Enerpac MITT Series User manual

Document Number: L4473
Document Revision: D
Document Revision Date: 28 Feb 2022
Document Language: ENGLISH EN
Operation and Maintenance Manual
Mechanical Isolation & Test Tools
Enerpac MITT Series
To reduce the risk of injury, user must read and understand this document before use.

For other languages go to www.enerpac.com.
Para otros idiomas visite www.enerpac.com.
Para outros idiomas consulte www.enerpac.com.
L4473_d
MITT SERIES
MECHANICAL
ISOLATION
AND
TEST TOOLS
Contents
1.0 INTRODUCTION ......................................................................................................................................... 1
2.0 SAFETY ....................................................................................................................................................... 1
3.0 FEATURES AND COMPONENTS............................................................................................................... 3
4.0 PREPARATION ............................................................................................................................................ 4
5.0 OPERATION ................................................................................................................................................ 5
6.0 MAINTENANCE......................................................................................................................................... 12
7.0 TROUBLESHOOTING ............................................................................................................................... 13
8.0 TECHNICAL DATA .................................................................................................................................... 17
9.0 TOP LEVEL ASSEMBLIES........................................................................................................................ 24
10.0 REPAIR PARTS LIST................................................................................................................................. 27
11.0 APPENDIX A - TOOL AND STANDARD PRESSURE GUIDE .................................................................38

L4473_d 1
1.0 INTRODUCTION
Overview
The Enerpac™ Mechanical Isolation and Test Tool
(MITT) is a dual purpose tool that provides a safe,
reliable and cost-eective means for the localized
isolation and pressure testing of piping. When installed
and functioned properly, the MITT creates a positive
vapor barrier to allow hot work to safely take place and
verifies the integrity of a newly welded or formed joint
through pressure testing.
The tool’s isolation function is as a Vapour
Barrier ONLY. Not to be used as a pressure plug.
There are two design types of the tool, single bolt and
multi bolt, that cover a size range from ¾” to 40”.
• Single bolt: ¾” to 2”
• Multi bolt: 3” to 40”
Custom tools and larger sizes are available upon
request, but may follow a unique set of instructions.
This document will detail the safe installation and
operation procedures required to be undertaken to
ensure the correct and safe deployment of the MITT,
in order to conduct localized isolation and weld testing.
Tools shall only be used by trained and
competent personnel.
Delivery Instructions
Upon delivery, all components must be inspected for
damage incurred during shipping. If damage is found,
the carrier should be notified at once. Shipping damage
is not covered by the Enerpac warranty.
Warranty
• Enerpac guarantees the product only for the
purpose for which is intended.
• Refer to the Enerpac Global Warranty document
for terms and conditions of the product warranty.
Any misuse or alteration invalidates the warranty.
• Observe all instructions as communicated in this
manual.
• Modification to any part of the equipment outlined
in this manual shall not be attempted, as it will
invalidate the warranty and can lead to serious
injury or death.
• When replacement parts are needed, use only
genuine Enerpac replacement parts.
Part Replacement
Check the Repair Parts Sheet (RPS) section of this
document, to order replacement parts when required.
WARNING
WARNING
2.0 SAFETY
Read all instructions carefully. Follow all recommended
safety precautions to avoid personal injury as well
as damage to the product and / or damage to other
property. Enerpac cannot be responsible for any
damage or injury from unsafe use, lack of maintenance,
or incorrect operation. Do not remove warning labels,
tags, or decals. In the event of any questions or concerns
arising, contact Enerpac or a local Enerpac distributor
for clarification.
If you have never been trained on high-pressure
hydraulic safety, consult your distributor or service
center for information about Enerpac Hydraulic Safety
Courses.
This manual follows a system of safety alert symbols,
signals, words, and safety messages to warn the user of
specific hazards. Failure to comply with these warnings
could result in death or serious personal injury, as well
as damage to the equipment or other property
The Safety Alert Symbol appears throughout
this manual. It is used to alert you to potential
physical injury hazards. Pay close attention
to Safety Alert Symbols and obey all safety
messages that follow this symbol to avoid the possibility
of death or serious injury.
Safety Alert Symbols are used in conjunction with certain
Signal Words that call attention to safety messages or
property damage messages and designate a degree or
level of hazard seriousness. The Signal Words used in
this manual are DANGER, WARNING, CAUTION, and
NOTICE.
Indicates a hazardous situation that, if not
avoided, will result in death or serious personal injury.
Indicates a hazardous situation that, if not
avoided, could result in death or serious personal injury.
Indicates a hazardous situation that, if not
avoided, could result in minor or moderate personal
injury.
Indicates information considered important,
but not hazard related (e.g. messages related to property
damage). Please note that the Safety Alert Symbol will
not be used with the signal word.
DO: an illustration showing how the tool should
be used.
DON’T: an illustration showing an incorrect way
to use a tool.
DANGER
WARNING
CAUTION
NOTICE

2L4473_d
2.1 Safety Precautions
Failure to observe and comply with the following
precautions could result in death or serious personal
injury. Property damage could also occur.
• Read and completely understand the safety
precautions and instructions in this manual before
operating the Mechanical Isolation and Test Tools
or preparing them for use. Always follow all safety
precautions and instructions, including those that
are contained within the procedures of this manual.
• Tools are not rated to hold back pressure - never
allow build up of pressure behind the tool, as this
can result in the tool ejecting and causing serious
bodily injury or death.
• Ensure all hydraulic components are rated to a
minimum safe working pressure of 5,000PSI.
• Do not overload equipment.
• Never exceed the safe maximum test pressure of
the pipe to be tested.
• Wear personal protective gear when operating
hydraulic equipment. Always wear eye protection.
Safety equipment such as dust mask, non-
skid steel-toed safety shoes, hard hats, gloves
or hearing protection (used as appropriate) will
reduce personal injuries.
• Applying pressure to a damaged hose may cause it
to rupture. Immediately replace worn or damaged
parts. Use only genuine Enerpac parts from
approved distributors or service centres. Enerpac
parts have been engineered and manufactured to
be fit-for-purpose.
• To minimise risk of personal injury keep hands
and feet away from the tool and workplace after
installation and torque operations are complete.
• Do not handle pressurised hoses; escaping
medium under pressure can penetrate the skin,
causing serious injury. Seek medical attention
immediately if oil penetration is suspected.
• Only pressurize complete and fully connected
hydraulic systems. Do not pressurize systems that
contain unconnected couplers.
• Always remain out of the line of fire of the tool after
installing the tool and actuating the seals.
• Always vent process vapors downwind at least 30
feet away to prevent risk of volatile atmosphere in
the hot work zone.
• During isolations, pressure between seals must be
verified/monitored regularly to ensure vapor barrier
is still in place.
• During isolations, pressure upstream of tool must
be verified / monitored constantly to ensure no
pressure build up.
• Never attempt to connect or disconnect hoses
while the system is pressurized.
• Becertainthatallhosecouplingsarefully connected
at both the pump and tool fittings before applying
any hydraulic pressure. If the couplings are not
fully connected, medium flow will be blocked, and
the tool could be subjected to excessive hydraulic
pressures. Catastrophic failure of tool could result.
WARNING
• Never apply more hydraulic pressure to any tool,
hose, fitting or accessory than the maximum
allowable pressure as stated in the manufacturer’s
specifications. The system operating pressure
must not exceed the pressure rating of the lowest
rated component in the system.
• Be sure the operator has completed safety induction
training, specific to the work surroundings. The
operator should be thoroughly familiar with the
controls and the proper use of the tool.
• The operator must be of at least the minimum age
required by applicable local regulations, laws and
the facility standard operating procedures.
• Never strike the tool while it is pressurized or under
load. Components under pressure may become
dislodged, allowing them to become dangerous
projectiles. Dislodged tools may result in loss of
seal / isolation and cause flammable or volatile
conditions.
• Avoid striking the tool at any time, even when it
is not pressurized or under load. Striking the tool
could cause permanent damage to components.
Failure to observe and comply with the following
precautions could result in minor or moderate personal
injury. Property damage could also occur.
• Inspect all ports, ensure they are clean and free
from obstruction.
• Ensure components are protected from external
sources of damage, such as excessive heat, flame,
moving machine parts, sharp edges and corrosive
chemicals.
• Take care to avoid sharp bends and kinks in
hydraulic hoses. Bends and kinks can cause
severe back-up pressure and cause hose failure.
Protect hoses from dropped objects; as a sharp
impact may cause internal damage to hose wire
strands. Protect hoses from crush risks, such
as heavy objects or vehicles; crush damage can
cause hose failure.
• Do not lift equipment by the hoses or couplers.
Use only the designated carrying handles.
• Equipment must only be serviced by a qualified
technician. For repair service, contact the Enerpac
Authorized Service Centre in your area.
• Rope o working area and place warning signs.
• Hot surfaces can be a major source of ignition.
Enerpac has designed and constructed the
MITT series tools to minimize the possibility of
an incendiary spark that may be caused by the
impact of aluminium components with corroded
steel. However, to reduce the chance of an
incendiary spark, use of the tools with corroded
steel structures or components should be avoided
whenever possible. Be especially careful to avoid
accidental impacts with the tools and corroded
steel.
CAUTION
NOTICE

L4473_d 3
3.0 FEATURES AND COMPONENTS
3.1 Single Bolt Configuration
Figure 1: Single Bolt Component Overview (Patent pending)
6
1 2 34
7
5
9 9
4
8
3.2 Multi-Bolt Configuration
5
1
2
3
6
4
7
8
8
Figure 2: Multi-Bolt Component Overview (Patent pending)
Key:
1. Nut
2. Washer
3. Collar
4. Spacer
5. Annular Ring
6. Mandrel
7. Seal Set
8. Internal Seal
9. Backing Rings
Key:
1. Back Plate
2. Front Plate
3. Annular Ring
4. Washer
5. Nut
6. Seal Set
7. Pipe
8. Backing Rings

4L4473_d
4.0 PREPARATION
4.1 Pre-Job Considerations
MITT components / assemblies may require lifting.
Ensure that there is adequate lifting equipment,
accessories and competent personnel to perform the
task.
All lines to be worked on should be blinded and vented
before any work begins. Lines must be depressurized
and monitored for pressure build up with a low pressure
gauge (0-15 psi recommended) prior to beginning work.
It is recommended that primary blinding/blocks/
isolations are of the double block and bleed type.
At no time should any person be allowed to
stand in the line of fire (open end of the pipe) while the
tool is installed in the line.
Figure 3:
High Risk Area
Low Risk Area
Low Risk AreaLow Risk Area
Low Risk Area
Low Risk AreaLow Risk Area
High Risk Area
Line of Fire Risk Areas
Once installed in a line, the tool shall be
monitored continually to assure no pressure build up
occurs behind the tool. Never leave a tool installed in
a line unattended while hot work is taking place in the
immediate job area.
Weld beads should be ground down to meet piping
specifications and piping edges must be deburred to
prevent seal damage as excessive weld beads may
prevent the tool from successful insertion in the pipe.
Prior to installation of the MITT tool, the immediate
installation area – including where the seals will land
– must be cleaned of any residual product, scaling or
corrosion.
4.2 Tool Preparation
4.2.1 Tool and Seal Selection
Select the appropriate tool to match the pipe diameter
and wall thickness as measured on location. Select
seals and seal backing rings (as needed) appropriate to
the pipe schedule and test pressure required. Refer to
Appendix A: Tool Standard Pressure Guide for selection.
Ensure the seal matches the tool size specification.
Before use, the seals and tool must be visually inspected
for any significant wear, damage, or issues with bonding.
It is recommended that an extra set of seals is available
for replacement as needed. Seal longevity is dependent
WARNING
WARNING
on test pressures, extrusion gap and pipe conditions
but may typically last between 5 and 10 uses.
Reference Appendix A: Tool Standard Pressure Guide
for tool / seal compatibility.
4.2.2 Gauge Selection
Adequately ranged pressure gauges are required for the
proper function of each port of the MITT during isolations
and pressure tests. Refer to the Operation sections for
appropriate gauge selection for each function (5.1 for
isolations and 5.2 for pressure testing).
4.2.3 Fittings
Selected fittings must be rated to the max pressure
capability of the pump being used.
Through-port vents are to remain as
threaded connections ONLY. Quick-disconnect fittings
of any type or style are NOT permitted to be used on
any through-port vent connections.
4.2.4 Lubricating studs / washers
Lubricating the studs and washers helps to transmit
the torque load to the seals. See below guidance for
lubricating the stud and washer. Section 8 provides
both lubricated and unlubricated torque values.
Caution must be taken to ensure the
lubricant does not come into contact with the seals
or tube ID. Failure to properly apply the lubricant on
the shaft threads and washers may cause incomplete
torque transmittal resulting in decreased pressure
holding capacity.
• Single bolt tool
Liberally spread lubricant over both sides of the washer
and on the threads of the stud shaft.
Figure 4: Single bolt tool
• Multi bolt tool
Liberally spread lubricant over both sides of all washers
and on the threads of all stud shafts.
Figure 5: Multi Bolt Tool
CAUTION
CAUTION
Stud
thread washer
Stud
thread
washer

L4473_d 5
5.0 OPERATION
Enerpac’s In-line Weld Test Tools feature double
block and bleed isolation. Once set in position these
tools provide a verified vapor barrier allowing hot
work activities to take place safely on-site. To test the
weld the same tool is repositioned over the weld area.
The weld test is typically undertaken using water as the
test medium, but can be undertaken using inert gas
where necessary.
MITT tools are actuated by applying torque to a single
fastener or multiple fasteners. Each style and size
requires dierent torque values and torqueing patterns.
The proper torque values shall be used for each tool and
can be found in Appendix A: Tool Standard Pressure
Guide.
Gauges must be selected properly to ensure safe
isolations.
• 0-100 PSI gauges shall be utilized to test/monitor
the integrity of the seals during positive pressure
isolations.
• 0-30 PSI, or lower, gauges installed on through-
port vent ports for the purpose of monitoring for
pressure build-up behind the MITT.
Prior to beginning work, ensure all tools and accessories
have been tested and/or calibrated and have valid test/
calibration labels.
Ensure each MITT has the proper fittings for each port
to mate with the ancillary equipment to be used during
operation.
During operation only use clean filtered water.
5.1 Isolations
To perform hydrodynamic isolations, MITT tools are
designed to be placed in piping upstream from the area
in which you want to perform any form of hot work.
The device seals and blocks one portion of the pipe
from the other, therefore isolating and containing the
work area from the rest of the piping system.
MITT tools are NOT to be used as a primary
means of creating an isolation point.
The devices have through-ports that are to remain open
for upstream gas and pressure monitoring. The purpose
of this port is to monitor upstream gas or pressure.
WARNING 1/2” tools (MITT050) do not have a through-
port due to the size of the tool. For these tools, it is
especially critical to have one or more upstream vents
which are monitored throughout the duration of the
isolation.
A hydrodynamic isolation requires the supply of a
continuous flow through the tool to dissipate the heat
from welding or stress relieving. The following shall
identify the basic steps required to accomplish a
hydrodynamic application of the Enerpac™ Isolation
Tool:
Note: Custom 3/4” - 4” hydrodynamic capable tools can
be ordered from Enerpac™.
5.1.1 Installation for Isolations
1. Install correctly chosen seals and seal backing
rings (if required) as per figures 1 and 2.
NOTICE
2. For isolations / vapor barriers, steel hard line
extensions shall be connected directly to the MITT
to transition past the heat aected zone due to
temperature limitations of flexible hose extensions
and better protect the lines against potential
abrasions. Flexible hoses can be connected to the
hard lines once past the heat aected zone.
3. Insert and position the tool in the pipe as far as
possible from the hot work area to ensure minimal
heat exposure to the seals – must be a minimum
of 6 inches, although 12 inches is recommended.
4. Ensure fill and vent fittings are positioned 6 o’clock
and 12 o’clock respectively to allow the test
medium to properly fill the tool cavity and bleed
o air.
5. Torque the tool nuts to compress the seals until
initial contact is made with the piping internal
diameter
• For single bolt tools, tighten using a cresent
wrench. Tighten the nut until the tool is stationary
and a seal is achieved. Care must be taken not to
exceed the max torque value specified in Section 8
of this manual. The nut must always be accessible.
• For single bolt tools, the tool shall be held as
concentric to the pipe as possible during torqueing
operation to aid correct seating of seals.
• For multi-bolt tool systems, a torque wrench
may be used to tighten the compression nuts to the
ASME PCC-1 Alternate Assembly Pattern #3.
6. Connect all the hoses and accessories as per
Figure 6 except for the isolation gauge. Fill the tool
until the test medium begins to seep out of the
upper fitting. Attach the isolation gauge.
7. If necessary torque the nuts to the value as detailed
in Section 8 following ASME PCC-1 Alternate
Assembly Pattern #3
8. Pressurize the tool and close the inlet valve to
verify hydrostatic seal can be maintained to the
required pressure. Recommended minimum of 50
PSI be held for duration of installation.
9. Attach pipe assembly, vent hose and low
pressure gauge to the through-port, per figure 4.
All threaded connections shall be wrapped with
Teflon tape. Route the attached vent hose a
minimum of 30 feet, downwind of the work area in
a safe location. Be mindful of any other potential
ignition sources when routing the vent hose.
NOTICE
Please note that 1/2” tools cannot
connect to a vent hose. For these tools, it is
especially critical to have one or more upstream
vents which are monitored throughout the duration
of the isolation.
The vent port shall:
• Have only approved hoses or fittings connected
to it
• Have all approved hoses or fittings arranged
such that inline vapors are always vented to
a safe distance and location away from the
isolation point
• Have an inline gauge connected to allow
continuous pressure monitoring, see figure 6.

6L4473_d
The vent port shall not:
• Be blocked o by any means
• Be modified in any way
• Be blocked by debris
• Have any connections that do not allow vapor
to vent properly to a safe distance and location
away from the isolation point
• Ever be used as a port to introduce pressure
behind the tool
Should the vent port be blocked by debris, the
debris shall be cleared in a manner so as to not
damage the threads.
Should the threads be damaged in any way, the
tool shall not be used.
Once the seal has been proven hydrostatically,
connect a supply hose to the inlet (lower) fitting
on the Enerpac™ MITT and open the inlet valve.
Quick disconnect connections are NOT
permissible for any portion of the through-port monitor
assembly.
For multi-bolt hydrodynamic isolations
the front of the MITT must be packed with insulation
to protect from radiant heat for any heat treatment
processes. Improper shielding may result in tool and
seal damage potentially catastrophic to the function of
the isolation/vapor barrier.
10. Open the discharge valve suciently to establish
a flow through the Isolation Tool while maintaining
a pressure within the Tool cavity (monitored at the
inlet).
11. The flow through the Tool will need to be enough
to prevent overheating of the Seal. Discharge flow
from the Tool should be no more than warm to the
touch.
12. Both inlet and outlet pressures must be monitored.
A decrease in the outlet pressure and flow without
a corresponding decrease in the inlet pressure can
indicate a problem with the seals.
At no time should the isolation installer(s) or
any other personnel perform hot work without a gas test
and without authorization from the installer.
5.1.2 Reactivate an Unattended Isolation
An isolation shall never be left unattended,
but in the event that a technician must approach an
unattended isolation, the following steps shall be
followed:
1. Installing technician to request a gas test prior to
entering the area.
2. Installing Technician to visually inspect Enerpac
Isolation gauges and seal for condition.
3. Seals must be reverified, as per section 5.1.1, step
8.
4. Adjustments to the Tool are to be made until a new
isolation seal is proven.
5. The Isolation Installer will notify the customer
representative that it is safe to begin hot work in
the area. They will monitor the isolation while work
is in progress and until the work has been stopped
or has been completed.
WARNING
NOTICE
CAUTION
WARNING
5.1.3 Monitoring Isolations
To monitor the isolation while work is being performed,
ensure the following:
• While the tool is installed, at no time can parts (vent
gauges or hoses) be removed. Welders and Pipe
fitters may request to have the venting apparatus
temporarily removed so that they can perform their
work and have easier access to the work. This
practice is strictly forbidden.
Constant monitoring is required to ensure
there is no back pressure build -up.
Removing the venting assembly negates the
use of the MITT as an isolation / vapor barrier and likely
creates a volatile and/or flammable atmosphere.
• Only trained installers are authorized to monitor
isolation.
• No hot work can be performed in the aected area
unless isolation tool seal is checked and monitoring
of Isolation Tool gauges occurs.
• Loss of pressure shown on the pressure gauge
represents one seal has failed. Work is to be
stopped immediately until the Isolation seal is re-
checked and proven.
• Increase of pressure shown on the pressure gauge
represents an increase of temperature of the pipe.
If pressure is increased too high, it is possible one
of the seals may leak. Reduce the pressure to
maintain a pressure between 20-50psi.
• Pressure increase on vent gauge represents a
build-up of upstream pressure / product behind
the Isolation Tool. Work is to stop immediately, and
area cleared until upstream pressure is reduced to
acceptable levels, prior to continuing work in the
area.
• At NO TIME shall any personnel be standing or
monitoring gauges directly in front of the isolation
tool. All workers are to remain o to the side and
out of the “LINE OF FIRE.”
• When an Isolation Tool is left unattended, a
warning sign MUST be placed in the area to alert
any personnel that a Enerpac™ MITT is in place.
• Once the weld has been completed and cooled
down, the isolation can be removed.
5.1.4 Removal of an Isolation
1. Notify operations that an isolation needs to be
removed
Verify that there is no back pressure or
product behind the tool
Prior removal of any equipment, ensure that
a representative from the safety department is present
with a gas monitor to monitor for any flammable/noxious
gases during the subsequent steps.
2. Loosen and remove the vent gauge, vent hose,
and vent pipe.
3. Bleed o the pressure from the annulus.
4. Remove the inlet and outlet hoses.
5. Gradually loosen nuts evenly to prevent stud
overload/damage. After several passes on
NOTICE
DANGER
DANGER
DANGER

L4473_d 7
loosening the studs, the tool will gain clearance
from the pipe and can be removed. If needed, use
a twisting motion while pulling to aid in removal.
5.2 Pressure Testing
Mechanical Isolation & Test Tools are designed to be
installed into the pipe to perform a localized hydrostatic
test in a specific weld area. Each tool contains two
parallel seals with a test chamber located in between
them. The tool must be inserted into the pipe such that
the seals straddle the weld.
Prior to beginning, pressure gauges must be selected to
match the specific test application. Assure the selected
gauge has a current calibration certificate. Proper
gauge selection shall preferably have dials graduated
over a range of approximately double the intended test
pressure. In no case should the upper limit of the gauge
be less than 1-1/2 times that pressure, nor more than
4 times the test pressure. Refer to the table below for
recommended selection criteria.
Gauge Range
(PSI)
Suitable for Tests
From To
0-30 7.5 20
0-60 15 40
0-100 25 66
0-160 40 106
0-200 50 133
0-300 75 200
0-600 150 400
0-1000 250 666
0-2000 500 1333
0-5000 1250 3333
0-10000 2500 5333
1. Install correctly chosen seals and seal backing
rings (if required) as per Appendix A: Tool and Seal
Index Table.
2. Insert and position the MITT tool such that the
weld being tested is centered between the two
Seals, if possible.
3. Ensure fill and vent fittings are positioned 6 o’clock
and 12 o’clock respectively to allow the test
medium to properly fill the tool cavity and bleed
o air.
4. Torque the tool nuts to compress the seals until
initial contact is made with the piping internal
diameter.
• For single bolt tools, tighten using a crescent
wrench. The nut must always be accessible.
• For multi-bolt tool systems, a torque wrench
may be used to tighten the compression nuts
to the ASME PCC-1 Alternate Assembly
Pattern #3.
5. Once the initial actuation is complete (the primary
torque value is achieved), allow 5 minutes for
relaxation of the seals. Check the torque applied
prior to flooding the test chamber.
6. To introduce test medium into the cavity of the
weld test tool, there are unique steps for single-
bolt and multi-bolt tools to purge the air from the
test chamber.
• For single-bolt tools:
i. Lightly actuate the seals until they fully make
contact with the pipe ID.
ii. Connect the test manifold, test gauge and other
ancillaries, as normal
iii. Fill the test chamber and begin to build pressure
untiltheairisexpelledwherethepipeIDandseals
make contact
iv. Once the test medium begins to seep out, stroke
the pump a few more times until only the test
mediumisleaking.Thisisreferredto“burpingthe
tool” to purge the air from the test chamber.
v. Close the valve on the test manifold.
vi. Lightly tighten the compression nut to make
further pipe wall contact.
• For multi-bolt tools:
i. Connectahosefromthepumptothelowerfitting
and fill until medium begins to seep out of the
upper fitting, then attach all hoses.
7. Install selected pressure gauges via quick
disconnects.
8. Tighten fasteners to within the specified torque
range in 25% increment steps of the desired
torque until the desired torque value is achieved.
Note: Some pressure may build up within the
test cavity due to the compression of the area. If
pressure buildup is greater than 10% of the desired
test pressure, bleed the test cavity via the relief
valve of the pump to zero and continue to torque.
Repeat if necessary.
• Torquing while under pressure of the test medium
may cause one, or both, of the seals to roll from
outside the seal retaining area. Should this occur,
the seals will be damaged, unable to retain test
pressure, and will cause the Enerpac MITT to
become stuck within the pipe.
• For applications with lower pressures and/or higher
extrusion gaps, lower torque values are acceptable
and often preferred to prevent seal extrusion.
• For applications with higher test pressures and
seal backers are not available, extra care may
be required to torque the studs and pressurize to
intermediate levels and longer intermediate hold
times (still via ASME PCC-1 Alternate Assembly
Patterns) as this will help to solidify the seals.
9. Once the desired torque value has been achieved,
pressurize the test cavity in 25% increments of the
prescribed test pressure. At each increment, stop
and hold the pressure for the minimum of 1 minute.
If possible, visually inspect the tool, looking for
puddling of test medium or other signs of a leak
occurring.
10. After the test pressure has been held for the
specified amount of time and the Customer /
Inspector confirms that their requirements have
been satisfied, release the pressure to zero and
recover test medium.

8L4473_d
11. Disconnect gauge and pump hose assemblies.
12. Loosen the fasteners. Note that with multi-bolt
tools to loosen no more than 3 turns per fasteners
to evenly unload the torque and not overload a
single stud.
13. Remove the tool from the pipe.
14. Visually inspect seals to determine if they are in
good condition for further use or must be replaced.
15. Safely package the MITT tool for transport and
storage in a way to prevent damage.

L4473_d 9
5.3 MITT Ancillary Kit Instructions
Overview
The Enerpac™ Mechanical Isolation and Test
Tool Ancillary Kit (MITTAK) is a kit that contains all
components required to safely and properly function
MITT series tools for isolations and pressure tests. Each
kit is split into the subassemblies laid out below. Some
subassemblies will require assembling the components
Figure 6:
Isolation Gauge
Through-Port Vent Assembly
with Gauge Monitor
Through-Port Vent Hose
Vapour Monitor
Hose
Extensions
Test/ water
Header assembly
for Isolation. (See Fig 8)
Test
Pump
(MP350 / MP-10T)
Isolation Arrangement
* 1/2” tools (MITT050) do not have a through-port vent, and therefore require constant monitoring on the nearest
upstream vent
Figure 7:
Test Gauge
Hose
Extensions
Test/ water header
assembly
(see Fig 8)
Test
Pump
(MP350 / MP-10T)
Test Arrangement
*
Enerpac’s recommended MITT system
setup should be used in all applications that allow it.
There are other industry-accepted components and
methods for integrating ancillaries with the MITT series
tools; however Enerpac must review and approve the
use of dierent components and system arrangements
incorporating the MITT series tools prior to use.
NOTICE
All ancillary components should be sourced
from Enerpac to ensure suitability. Any components not
sourced from Enerpac must, at a minimum, be properly
rated to the application medium and pressures. Not
following these recommendations can result in serious
injury.
WARNING
prior to mobilizing to the worksite. The below section
illustrates how to safely assemble and connect each
subassembly and how to integrate with the MITT tools
to perform safe isolations and pressure testing.

10 L4473_d
MITTAK Subassemblies
All subassemblies must be tightened as per Figure 6 and Figure 7 in accordance with standard hand tightening
specifications. All threaded connections require Teflon tape or thread sealant.
*Note the MITTAK Ancillaries Kit does not include the pump. To source a pump from Enerpac, please order
components listed in Table 2.
Table 1: Parts List for MITTAK Ancillaries Kit*
Part No Top Level Description Qty Sub-Components
Qty
(Sub-
components per
Assembly)
Qty
(Total
Sub-
components per
MITTAK)
CM4 Industrial Storage Case, 4.5 ft³ 1 - - -
DM1249900 Test/Water Header Assembly 2
1/4” Inline ball valve 1 2
1/4” High-Flow QC (plug - male threads) 2 4
1/4” Tee (Female x female x male) 1 2
1/4” High-Flow QC (coupler - male threads) 1 2
DM1250900 1/4” High Flow QC w/Hex Plug 2 1/4” High-Flow QC (coupler - female threads) 1 2
1/4” Hex-Socket Plug 1 2
DM1251900 Test Pressure Hose Fittings 4 1/4” High-Flow QC (coupler - female threads) 1 4
1/4” High-Flow QC (plug - female threads) 1 4
DM1252900 Hand Tools 1
1/2” Drive Adjustable Torque Wrench - 20 to 150 ft.-lbs. 1 1
1/2” Drive Socket Extension - 20” Long 1 1
9/16” Point Alloy Combination wrench 1 1
1-1/16” x 1/2” Drive 6 PT Deep Hand Socket 1 1
9/16” x 1/2” Drive 6 PT Deep Hand Socket 1 1
1/2” x 1/2” Drive 6 PT Deep Hand Socket 1 1
DM1253900 1/4” Pipe Extension - Water Assembly 4
1/4” High-Flow QC (coupler - female threads) 1 4
1/4” Schedule 80 Pipe Nipple x 20”L 1 4
1/4” High-Flow QC (plug - female threads) 1 4
DM1254900 Gauge Case w/Gauges Assembly 1
2” Dial Steel Case Multipurpose Gauge (0-30 PSI)* 2 2
2” Dial Steel Case Multipurpose Gauge (0-100 PSI)* 2 2
Protective Storage Case 1 1
5 1/4” High-Flow QC (coupler - female threads)
DM1255646 Vent Hose 2 50ft. Air hose with 1/4” NPT Male Fittings 1 2
DM1414900 Vent Pipes Assembly 2
1/8” x 24” Schedule 40 Black Steel Welded Pipe Nipple 1 2
3/8” x 24” Schedule 40 Black Steel Welded Pipe Nipple 1 2
3/4” x 24” Schedule 40 Black Steel Welded Pipe Nipple 1 2
1/4” x 1/8” NPT 3000 lb Forged Steel Reducer Coupling 1 2
3/8” x 1/4” NPT 3000 lb Forged Steel Reducer Coupling 1 2
3/4” x 1/4” NPT 3000 lb Forged Steel Reducer Coupling 1 2
1/4” Male NPT x 1/4” Female NPT Steel Street Tee 3 6
H9206Q Hydraulic Hose with 1/4” NPT Male
Fittings - 5800 PSI Rated - 6ft. Long 4 - - 4
G2514L
Hydraulic Pressure Gauge, 2.50 in. Face,
Lower Mount, Glycerine Filled, 1,000
maximum PSI
1 - - 1
G2515L
Hydraulic Pressure Gauge, 2.50 in. Face,
Lower Mount, Glycerine Filled, 2,000
maximum PSI
1 - - 1
G2517L
Hydraulic Pressure Gauge, 2.50 in. Face,
Lower Mount, Glycerine Filled, 6,000
maximum PSI
1 - - 1

L4473_d 11
Items which are not included in the MITTAK Ancillaries Kit, but can be supplied if required, are listed below.
Table 2: Parts List for Pump, Hose and Reservoir Integration
Part No Top Level Description Qty
MP350 Multifluid Hydraulic Hand Pump, two speed, 350 bar 1
MP-10T Reservoir Kit 1
H9206Q Hose, 6ft, 1/4” NPT 1
424126-131280 Reducer bushing from to 3/8” NPT male - female 1/4” NPT 1
0482836 1/4” high-flow Quick Connect female threads 1
To view the below assembly (DM1249900 with plug or DM1249900 with gauge) within the complete Isolation or Test
Arrangement, see figures 6 and 7.
Figure 8:
Isolation arrangement.
(DM1249900 with plug)
See Figure 6
Test arrangement.
(DM1249900 with gauge )
See Figure 7
1
2
3
4
2
5
DM1249900 - Test/Water Header Assembly Overview
Key:
1. 1/4” Inline ball valve
2. 1/4” High-Flow QC (plug - male threads)
3. 1/4” Tee (female x female x male)
4. 1/4” High-Flow QC (coupler - male threads)
5. DM1250900 (which includes 1/4” QC female
and 1/4” hex socket plug)

12 L4473_d
5.4 Special Instructions
This document is designed to address standard uses
and scenarios for localized piping isolation and testing.
There may be limited circumstances where variations
to our standard procedures or tools are required in
order to complete work satisfactorily. Some of these
circumstances may include post weld radiographic
testing, nitrogen purging, or other more unique
scenarios.
In any cases that require job-specific tool design
changes and/or procedural changes, these must be
developed with and approved by Enerpac’s engineering
department.
6.0 MAINTENANCE
6.1 Inspection, Maintenance and Storage
Periodically check all MITT components for loose
connections or damage. Before every application, all
components and seals must be inspected to ensure
that they are fit for use.
• Leaks in hose, tubing or fitting connections will not
allow a proper seal and therefore pressure cannot
be maintained. These will need to be retightened,
repaired or replaced prior to use.
• Any gouges in aluminum body material, especially
on the sealing surfaces of the annular ring, front
and back plates, or seal backing rings, may
prevent proper functionality of the tool. If unsure
as to the impact of the damage, a practice test can
be carried out or contact your local Enerpac repair
center.
• Seals must be free of cuts, indentations and/or
grooves due to damage from improper transport or
previous testing. All of these will result in diculty
sealing and require seal replacement.
Periodically check that all orifices are free of debris
and/or other obstructions (tubing, fittings, fill and vent
ports). Obstructions can result in improper venting and
pressure build-up that can become dangerous.
Store and transport MITT tools in the vertical position
(resting on the back plate) and ensure they are properly
secured to the pallet or crate that they are being
transported in.
Seals must be stored in a covered, low-light area to
minimize UV ray damage. Shelf-life for seals in exposed
conditions can be as little as 6 months, while properly
stored seals can last up to 24 months.
MITT equipment must only be serviced by a
qualified Enerpac technician. For repair service, contact
the Enerpac Authorized Service Center in your area.
NOTICE

L4473_d 13
7.0 TROUBLESHOOTING
7.1 Hydrostatic Isolation Tool
Fault Possible Cause Corrective Action
Loss of hydrostatic
pressure.
Eect: The tool will still
maintain an isolation via
the remaining Seal but
the extra safety factor
provided has been lost.
Hydrostatic barrier is
lost. Medium is leaking
from the tool through the
hose assembly or either
through the front or back
seal.
1. Stop any hot work
2. Investigate the source of pressure loss. If the medium is leaking
from:
• hoses, fittings or assembly, then either re-tighten fitings or reseal
the fittings with Teflon tape in order to acheive a positive seal.
• the front of the seal: Re-establish pressure if possible or adjust the
front seal until a positive pressure is achieved. Additional torque
may be required to the fasteners.
• neither of the above, the back seal is bad: Re-establish pressure if
possible. Additional torque may be required to the fasteners.
3. If unable to maintain positive pressure using the above
methodology:
• stop all work
• clear area
• reinstall following the tool installation procedure.
Back pressure indicated
on through-port vent
gauge.
Eect: The tool is now
operating as a plug,
instead of the isolation
and venting tool as
designed.
There is an increase in
pressure in the venting
assembly of the isolation
tool. Either the vent
system has been plugged
or the pressure building
up behind the tool faster
than it can be vented
from the venting system.
If any pressure is noted on the vent gauge, immediately:
1. Stop all work
2. Clear area. Remain out of line of fire at all times.
3. Report problem to operations
4. Keep area clear until the problem is identified and solved.
5. Only re-enter area when operations has reported that it is safe to
do so (may require gas test, a new permit, and additional PPE).
6. When returning, check isolation tool to ensure it is still intact and
gauges are reading proper pressures.
Pressure or vacuum on
isolation tool.
Eect: If the pipe is
venting, potentially
dangerous gases may
be released into the
area. Caution is needed
and extra PPE may be
required. If the piping
is under vacuum, the
surrounding air is drawn
into the pipe.
Thermal expansion and
cooling can occur on
piping when the pipe
heats up or cools down.
For example, when the
pipe heats up during
the day, the heat builds
up pressure in the pipe
which is then vented out
of the isolation vent hose.
During the evening, when
the pipe cools, it can
create a vacuum in the
pipe and draw air into the
vent hose to create an
equilibrium.
When removing an isolation, first remove the vent gauge and check to
determine if the pipe is either:
• under pressure, and venting out of the pipe
• under vacuum, drawing into the vent pipe
• under equilibrium, neither venting or drawing
1. If the pipe is under pressure, vent to a safe area, until equilibrium is
reached, before loosening tool. Additional venting may be required
upstream of the MITT installation point - contact facility operations
for assistance.
2. If the pipe is under vacuum, remove venting assembly and allow
equilibrium to be reached before loosening the tool. Additional
venting may be required upstream of the MITT installation point -
contact facility operations for assistance.
3. If the pipe is under equilibrium follow normal procedures.
The MITT tool is dicult
to remove after an
isolation.
Eect: Damage to the
tool and seals upon
removal.
The seals may have rolled
over the front and/or
back plates and become
wedged between the tool
and the pipe wall.
The root weld pass is too
large / protrudes into the
pipe.
• For rolled seals, bump the tool a little further into the pipe to
loosen the seal compression and then try to remove. If this
does not work, the tool can be disassembled and removed
one section at a time
• For a large root weld pass, the tool must be pushed a little
further into the pipe and reinstall the isolation per standard
operating procedure prior to grinding flush the weld bead.

14 L4473_d
7.2 Hydrodynamic Isolations
Fault Possible Cause Corrective Action
Back pressure indicated on
through-port vent gauge.
Eect: The tool is now operating
as a plug, instead of the isolation
and venting tool as designed.
There is an increase in pressure in
the venting assembly of the isolation
tool. Either the vent system has been
plugged or there is pressure building
up behind the tool faster than it can be
vented from the venting system.
If any pressure is noted on the vent gauge:
1. Do not turn o the water.
2. Stop all work.
3. Clear area. Remain out of line of fire at
all times.
4. Report problem to operations
5. Keep area clear until the problem is
identified and solved.
6. Only re-enter area when operations has
reported that it is safe to do so (may
require gas test, a new permit, and
additional PPE).
7. When returning, check isolation tool to
ensure it is still intact and gauges are
reading proper pressures.
Loss of hydrodynamic flow.
Eect: The tool will still maintain
an isolation via the remaining
Seal, but the extra safety factor
provided by Vital technology
has been lost. Additional
hazards may be introduced
into the work area. These
can include steam and water.
The steam is a potentially
dangerous heat hazard that can
cause severe burns. The water
can create slip hazards, or in
the presence of electricity (heat
treating elements), can create a
shock hazard.
In all cases, you must continue
to pump water through the
tool until the pipe system has
cooled. If the flow of water to
the tool is stopped, the tool
Seal system can melt / burn, the
tool can be damaged, and the
heat will not be safely isolated,
creating a potentially dangerous
environment.
Hydrostatic/Hydrodynamic barrier
is lost. Medium is leaking from tool,
through the hose assembly, the front
Seal or back Seal.
1. Contact operations, the customer and
the stress relieving personnel. They will
determine the next steps to be taken
and whether the work will continue or
not. In all cases, the water must be left
on until the tool has cooled suciently.
2. Do not turn o the water.
3. Investigate the source of pressure loss.
4. If the medium is leaking from hoses,
fittings, or assembly and it is safe to do
so, either re-tighten fittings or re-seal
the fittings with Teflon tape in order to
achieve a positive seal.
5. If the medium is leaking from the back
seal, continue with the heat treating or
stress relieving. Notify operations that
water is leaking into the line in the event
the line is moisture sensitive. Continue
to pump water through the tool.
6. If the medium is leaking from the front
seal, significant steam will be generated
and the heat-treating process will be in
jeopardy. Immediately:
• Do not turn o the water (this is the
instinctive reaction)
• Clear area

L4473_d 15
7.3 Pressure Testing - Hydrostatic Testing
Fault Possible Cause Corrective Action
Loss of or dropping hydrostatic
pressure
Eect: Hydrostatic test pressure
unable to be achieved and/
or held. It may be possible
to achieve and maintain test
pressure continuing to utilize
the pump for the prescribed
timeframe. Consult site QA/QC
whether maintaining pressure is
acceptable.
Hydrostatic pressure is lost or
dropping. Medium is leaking from
the tool through the hose assembly,
ancillaries or either through the front
or back seal.
1. Investigate the source of the pressure
loss.
If the medium is leaking from:
• Hoses, fittings or other ancillaries, then
either re-tighten or reseal the fittings
with Teflon tape in order to achieve a
positive seal. Replace any faulty or
damaged components as required.
• The front and/or rear seal:
Additional torque may be required.
Consult torque range for the tool
model, bleed any hydrostatic pressure
remaining to zero, apply additional
torque to the fasteners, repeat the
pressurization process.
2. If unable to achieve or maintain
hydrostatic test pressure:
• Uninstall MITT.
• Inspect the MITT seals and sealing
areas of both the tool and pipe ID for
defects. Replace and/or clean as
necessary.
• Reinstall as per the hydrostatic testing
process.
Air pocket trapped within the test
cavity.
1. Bleed any remaining pressure from the
test cavity.
2. Disconnect the test gauge and repeat
air purging per the installation process.
Ambient temperature fluctuations. 1. Evaluate near future weather conditions.
2. Discuss more favorable conditions and
scheduling with all relevant parties.
Mismatched pipe bores at seal/test
location.
1. Uninstall the MITT.
2. Identify the schedules / wall thicknesses
of both pipe bores for the application.
3. Choose the appropriate seals for each
pipe bore and arrange both on the MITT
accordingly to the application and tool
positioning.
4. Reinstall as per the hydrostatic testing
process.
Failure to obtain a leak tight test
area between the seals
Eect: Hydrostatic pressure
completely unable to be
achieved or built.
Incorrect tool size or seals selected to
suit the pipe bore.
1. Confirm nominal pipe size and schedule
/ wall thickness. Wall thickness
measurement may be required.
2. Choose correct MITT and seals.
3. Reinstall as per the hydrostatic testing
process.
Loose debris, mill scale, or excessive
rust in the pipe bore.
1. Uninstall MITT and inspect testing area.
2. Clean testing area of all debris, scale
and rust with a wire brush and solvent.
Wipe entire testing area dry / clean.
Consult asset owner for approval of
solvent types acceptable prior to use.
3. Reinstall as per the hydrostatic testing
process.

16 L4473_d
Hydrostatic Testing continued
Fault Possible Cause Corrective Action
Failure to obtain a
leak tight test area
between the seals
Eect: Hydrostatic
pressure completely
unable to be achieved
or built.
Internal weld bead or
pipe seam interfering
with one or both seals.
1. Uninstall MITT and inspect testing area and existing seal condition.
Replace seals if found damaged from the weld bead or pipe seam.
2. File or grind the weld bead or pipe seam to an acceptable level.
Every eort should be made to make it as flush as possible with
the pipe ID.
3. Clean testing area of all debris created from filing or grinding.
Wipe entire testing area dry / clean. Consult asset owner for
approval of solvent types acceptable, if used.
4. Reinstall as per the hydrostatic testing process.
Pipe is excessively
pitted or excessive
localized pipe wall
erosion exists.
1. Uninstall MITT and inspect testing area.
2. Clean testing area of all debris, scale and rust with a wire brush
and solvent. Wipe entire testing area dry / clean. Consult asset
owner for approval of solvent types acceptable prior to use.
3. In cases of wall erosion is suspected:
• A wall thickness reading must be taken to confirm appropriate
seals are being used.
• Consult the seal selection guide upon reviewing the wall thickness
reading and comparing findings to a pipe table.
• Consult Enerpac technical support, if required.
4. In cases where excessive pipe wall pitting is found:
• A lower durometer seal material may be required. This may cause
depreciated test pressure capabilities.
• Consult Enerpac technical support for seal selection and
availability.
Excessively out of
round pipe.
1. Uninstall MITT and inspect testing area.
2. Measure the high/low points of the pipe diameter.
3. Consult Enerpac technical support.
Seal(s) roll out of
retaining area.
Eect: Hydrostatic
pressure unable to
be achieved or built.
Seals lodge between
the pipe ID and MITT
OD, causing all or
part of the MITT to
become stuck in the
pipe.
Excessive torque
applied to MITT
fasteners.
1. Uninstall MITT and inspect seals for damage and/or grooving.
Replace damaged seals.
2. Consult and utilize appropriate torque range of the selected MITT.
Additional torque was
applied to MITT while
under hydrostatic
pressure.
1. Uninstall MITT and inspect seals for damage and/or grooving.
Replace damaged seals.
2. Consult and utilize appropriate torque range of the selected MITT.
• If additional torque is required during installation to seal a leak,
ALWAYS bleed the hydrostatic pressure to zero (0) prior to adding
the additional torque.
• Note that pressure build up will occur when adding torque
anytime test medium is present in the test cavity. This is due to
compression of the cavity when the addition torque is applied,
even when previously bled to zero (0). If pressure exceeds more
than 10% of the target test pressure, rebleed the hydrostatic
pressure. Repeat until the desired torque value is achieved.
3. Reinstall as per the hydrostatic testing process.
The MITT tool is
dicult to remove
after a pressure test.
Eect: Damage to the
tool and seals upon
removal.
The seals may have
rolled over the front
and/or back plates
and become wedged
between the tool and
the pipe wall.
The root weld pass is
too large / protrudes
into the pipe.
• For rolled seals, bump the tool a little further into the pipe to
loosen the seal compression and then try to remove. If this
does not work, the tool can be disassembled and removed
one section at a time.
• For a large root weld pass, the tool must be pushed a little
further into the pipe and reinstall the isolation per standard
operating procedure prior to grinding flush the weld bead.

L4473_d 17
8.0 TECHNICAL DATA
Key to Table Symbols
Pressure between seals up to this value can be achieved with optional seal backing rings and higher shore hardness seals. In-field conditions may not
allow these pressures to be achieved. Always ensure weld test pressure used never exceeds safe pipe loading. Refer to the MITT Series - Seal Selection
Guide document in Appendix A for capabilities at each pipe schedule and recommended seals and seal backing rings.
 This tool comes standard with seal backing ring for this pipe schedule; to meet pressure capability requirement.
§Pressure capability of tool at pipe schedule in factory conditions. In-field conditions may not allow these pressures to be achieved. Always ensure weld
test pressure used never exceeds safe pipe pressure loadings.
UM
LM
Unlubricated Maximum Torque value
Lubricated Maximum Torque value
 If sealing cannot be achieved using the information provided, contact Enerpac for further recommendations
8.1 Single Bolt Specifications (0.5” - 2”) ***
SingleBoltMITTRepresenta
B
A
Figure 9: Single-Bolt Representation
Part No.
Nominal
Pipe
Size
[DN]
Pipe
Schedules
Covered
[mm - wall
thickness]
OD
(A)
in
[mm]
Standard
Pressure
Rating
(Out of
the box) §
PSI [bar]
Tool
Max.
Pressure
Rating

PSI
[bar]
Stud
Nut
Washer
Size
(Qty)
Max
Torque
per
Stud
ft.lb
[Nm]
Pressure
Port Size
(ASME)
Seals
included
with Tool
Seal Backers
included
with Tool
Overall
Length
(B)
in
[mm]
Weight
LBS
[KG]
MITT050A
1/2”
5
.515”
[13]
< 425
4500
[310.2]
0.3125
(1)
LM:25
[33.9]
UM:30
[40.7]
Female
1/8”
NPT
MITT050ASTD-40SK
MITT050AXS-80SK
-14
[356]
1.4
[0.635]
10 < 425 1.4
[0.635]
STD/40 500
1.4
[0.635]
XS/80 2000
1.4
[0.635]
MITT050B 160 .425”
[10.8] 4000 MITT050B160SK -1.1
[0.49]
MITT075A 3/4”
[20]
5 [1.65]
0.699
[18]
< 425[29.3]
4500
[310.2]
0.375
(1)
LM:25
[33.9]
UM:30
[40.7]
Female
1/8”
NPT
MITT075ASTD/40SK
MITT075AXS/80SK MITT075ASTD/40BR 14
[356]
1.656
[0.751]
10 [2.11] 1150 [79.2]
STD/40 [2.87]
XS/80 [3.91] 3300 [227.5]
MITT075B 160 [5.56] 0.58
[15]
4500
[310.2] MITT075B160SK - 1.525 [0.692]
MITT1A
1” [25]
5 [1.65]
0.924
[23]
1150 [79.2]
4500
[310.2]
0.375
(1)
LM:25
[33.9]
UM: 30
[40.7]
Female
1/8”
NPT
MITT1ASTD/40SK MITT1ASTD/40BR
14
[356]
1.875
[0.850]
10 [2.77] 1150 [79.2]
STD/40 [3.38]
1.6
[0.73]
MITT1B XS/80 [4.55] 0.690
[18]
MITT1BXS/80SK
MITT1B160SK
MITT1BXS/80BR
MITT1B160BR
160 [6.35]
MITT125A 1-1/4”
[32]
5 [1.65]
1.13
[29]
< 425[29.3]
3350
[230.9]
0.625
(1)
LM:55
[74.5]
UM: 60
[81.3]
Female
1/4”
NPT
MITT125ASTD-40SK
MITT125AXS-80SK MITT125ASTD/40BR 14
[356]
2.906
[1.318]
10 [2.77] 425 [29.3]
STD/40 [3.56]
XS/80 [4.85] 3350 [230.9]
**
2250[155.1]
**
2250[155.1]
**
3375[232.6]
**
4500[310.2]
**
2250[155.1]

18 L4473_d
Part No.
Nominal
Pipe
Size
[DN]
Pipe
Schedules
Covered
[mm - wall
thickness]
OD
(A)
in
[mm]
Standard
Pressure
Rating
(Out of
the box) §
PSI [bar]
Tool
Max.
Pressure
Rating

PSI
[bar]
Stud
Nut
Washer
Size
(Qty)
Max
Torque
per
Stud
ft.lb
[Nm]
Pressure
Port Size
(ASME)
Seals
included
with Tool
Seal Backers
included
with Tool
Overall
Length
(B)
in
[mm]
Weight
LBS
[KG]
MITT150A 1-1/2”
[40]
5 [1.65]
1.36
[35]
425 [29.3]
4500
[310.2]
0.625
(1)
LM:55
[74.5]
UM: 60
[81.3]
Female
1/4”
NPT
MITT150ASTD-40SK
MITT150AXS-80SK -14
[356]
4.050
[1.837]
10 [2.77] 1150 [79.2]
STD/40[3.68] 2250 [155.1]
XS/80 [5.08] 3375 [232.6]
MITT150B 160 [7.14] 1.088
[28]

4500 [310.2] MITT150B160SK MITT150B160BR 3.438
[1.559]
MITT2A
2” [50]
5 [1.65]
1.817
[46]
425 [29.3]
3375
[232.6] 0.625
(1)
LM:55
[74.5]
UM: 60
[81.3]
Female
1/4”
NPT
MITT2ASTD-40SK
MITT2AXS-80SK -
14
[356]
5.375
[2.438]
10 [2.77] 1150 [79.2]
STD/40[3.91] 2250 [155.1]
XS/80 [5.54] 3375 [232.6]
MITT2B
160 [8.74] 1.437
[36]
4500
[310.2]
MITT2B160SK
MITT2BXXSSK MITT2B160BR 4.319
[1.959]
XXS [11.07]
Internal Seals: MITT050A - MITT050B (1/2”) MITT050AINTSK
MITT075A - MITT1B (3/4” - 1”) MITT075-1AINTSK
MITT125A - MITT2B (1-1/4” - 2”) MITT1.25-2INTSK
**
4500[310.2]
**
4500[310.2]
Single Bolt Specifications (0.5” - 2”) continued ***