Ashcroft V02 User manual

Installation and Maintenance Instructions for
V02 Monoflange
© Ashcroft Inc. 2020, 250 East Main Street, Stratford, CT 06614-5145, USA, Tel: [phone], Fax: [phone], www.ashcroft.com
All sales subject to standard terms and conditions of sale. v02_monoflange_i&m_ (I&M008-10282)_RevA_09-24-20
of 21
TABLE OF CONTENTS:
1 DESCRIPTION...................................................................... 1
1.1 Intended use ................................................................. 1
1.2 Information about the pressure equipment ............... 1
1.3 Monoflange types......................................................... 1
2 TRANSPORTATION AND STORAGE .................................. 2
3INSTALLATION..................................................................... 2
3.1 Installation conditions.................................................. 2
3.2 Connecting the manifold valve.................................... 2
4 PRIOR TO OPERATION ....................................................... 2
5OPERATION ......................................................................... 2
5.1 General information ..................................................... 2
5.2 Operating conditions.................................................... 2
5.3 Operation ...................................................................... 2
6MAINTENANCE.................................................................... 2
6.1 Resaling of the packing .............................................. 2
6.2 Maintenance and repair............................................... 2
V02 Style MN
1 DESCRIPTION
1.1 Intended use
Monoflanges are used for connecting measuring devices and
to equalize or shut off differential pressure in chemical plants,
power plants and similar facilities. The allowable operating
pressure depends on the temperature of the medium and
on the materials and sealing used. Refer to the respective
pressure-temperature diagrams for this pressure.
Use beyond these limits and any unauthorized modifications
can result in catastrophic valve assembly failure, causing
damage or injury. Any use of this product outside of the
recommendations provided by Ashcroft Inc. will void the
warranty and relieve the manufacturer and/or Ashcroft Inc. of
all liability.
Material Suitability
Ensure that the materials used for the wetted parts of the
monoflange are suitable for the media used. The manufacturer
cannot be held responsible for damage to the monoflange
caused by corrosive or reactive media. Failure to comply with
these precautions can endanger the user and cause damage to
the piping system
1.2 Information on the pressure equipment
The allowable operating pressure depends on the temperature
of the medium and on the materials and sealings used. This
can be found in the corresponding catalog sheet or drawing.
Note: It is possible that the stem sealing, packing and O-ring
occur on a combined basis with the different valve seats.
1.3 Monoflange types
Process-Monoflanges: have one "OS&Y-Needle Valve" as
primary isolation and - depending on the type - one "Needle
Valve" for venting and one "Needle Valve" as secondary
isolation valve.
V02 Style MG
Pictured with Anti-
-Tamper key attached.
Monoflanges are shipped
with unit anti-tamper
keys detached from the
valve head.

Installation and Maintenance Instructions for
V02 Monoflange
© Ashcroft Inc. 2020, 250 East Main Street, Stratford, CT 06614-5145, USA, Tel: [phone], Fax: [phone], www.ashcroft.com
All sales subject to standard terms and conditions of sale. v02_monoflange_i&m_ (I&M008-10282)_RevA_09-24-20
of 22
Instrument-Monoflanges: All valves are needle valve type.
Process-and Instrument-Monoflanges are available in three
different types BLOCK, BLOCK & BLEED and DOUBLE
BLOCK & BLEED.
2 TRANSPORTATION AND STORAGE
The monoflange must be depressurized before removal from
system and before storage or transportation. It should be
stored in its original packaging to avoid contamination or
damage. Upon receipt, anti-tamper keys are unattached to the
valve head unit.
3 ASSEMBLY
3.1 Installation requirements
The following installation conditions apply to the monoflanges:
Monoflanges are to be installed in such a way that employees
or third parties are not endangered.
The safety distances required by the relevant national statutory
provisions applicable in the country
of installation are to be observed.
Monoflanges must be installed or mounted in such a way:
- they are accessible for any necessary inspection and are
clearly visible;
- the labeling is clearly legible;
- operation of the monoflanges is possible from a safe
distance.
Monoflange must be protected from outside mechanical
influences to protect it from damage. Monoflange must be
protected from tampering by unauthorized persons.
3.2 Connecting the monoflange
Monoflanges must be connected via the inlets and outlets
provided. Additional introduction of forces or bending
moments applied to the connection pieces via piping
connections can damage the assembly and connection fittings
and must be avoided. Both form and cleanliness of threads
must be checked before assembly. Piping or fitting
connections must be made up tight. A thread tape or sealant
should be used for threaded pipe joints.
Weld seams on connections must be welded and tested
in compliance with valid approved welding methods. Steel
welded connections must be painted after welding in order to
avoid corrosion. Mating flanges should be checked to ensure
correct size and rating for flanged connection. Flanges should
be assembled using correct gasket or seal ring and bolted as
specified in ASME B16.5.
4 PRIOR TO OPERATION
Commissioning should not be carried out until the monoflanges
- have been correctly installed in the system and
- have been checked for correct assembly, installation
conditions and safe function.
The test before commissioning is provided by the system
operator to arrange. In the list countries
applicable national regulations are to be observed.
5 OPERATION
5.1 General information
Monoflanges with OS&Y Needle Valve and Needle
Valve are used to shut off media that can be
poisonous, explosive, irritating, very hot or very
cold. Any assembly and maintenance work must be
carried out by experienced and trained personal.
The generally valid regulations on health and safety as well
as accident prevention must be observed in addition to this
operating manual and the operating instructions for the system
and measuring instruments that are used.
For example oxygen operation.
The valve must only be operated by competent and authorized
personal.
5.2 Operating conditions
Refer to the monoflange drawing for the permissible operating
conditions.
5.3 Operation
Valves on the monoflange are actuated with
T-handle or socket wrench. Valves are closed
clockwise. The closing torque is approximately
3 Nm (2.2 foot-pounds).
Valves are fitted with a metal back seal between the
needle and the bonnet. This means that the valve head units
must always be completely open. This back seal is pressure-
supported. The higher the system pressure, the greater the
force with which the needle is pressed into the back seat.
Do not apply any increased closing torque when the needle is
in the back seat position. This is unnecessary and could cause
damage to the stem-needle connection.