Alfalaval 741 Series User manual

ESE03384-ENUS2 1810
Original manual
Instruction Manual
Series 741, 761, 762 & 771 Air-Actuated Valves

Table of contents
The information herein is correct at the time of issue but may be subject to change without prior notice
1. Safety .................................................................................................... 4
1.1. Important information ............................................................................. 4
2. Introduction ............................................................................................ 5
2.1. About this manual ................................................................................ 5
3. Maintenance ........................................................................................... 10
3.1. Valve Disassembly ................................................................................ 10
3.2. Valve Component Inspection .................................................................... 12
3.3. Valve Assembly ................................................................................... 13
3.4. TR and TR2 Stem/Seat Assembly .............................................................. 14
3.5. Type 10, 20, and 30 Actuator ................................................................... 15
3.6. Type 80 Actuator .................................................................................. 17
3.7. Type 15 And 25 Actuator ........................................................................ 18
4. Spare Parts ............................................................................................. 22
4.1. 741/761 Divert Valve ............................................................................. 22
4.2. 741/761 Shut Off Valve .......................................................................... 24
4.3. 761 Reverse-Acting Valve ........................................................................ 26
4.4. 761 Y-Body Valve ................................................................................. 28
4.5. 762 Kettle Valve ................................................................................... 30
4.6. 762 Tank Outlet Valve ............................................................................ 33
4.7. 762 Tangential Valve .............................................................................. 36
4.8. 771S Divert Valve ................................................................................. 38
4.9. 771S Reverse-Acting Valve ...................................................................... 40
4.10.771S Throttling Valve ............................................................................. 42
4.11.Type 15 25 Valve Actuators ...................................................................... 44
4.12.Diaphragm Actuators with Siemens Positioner 771S Series 1” .............................. 46
4.13.Diaphragm Actuators with Siemens Positioner 771 1-1/2” to 3” Valves .................... 48
4.14.736-X Swap Valve Short Stroke Stems ......................................................... 50
4.15.736-X Swap Valve Long Stroke Stems ......................................................... 52
4.16.736TR-X Swap Valve Short Stroke Stems ..................................................... 54
4.17.736TR-X Swap Valve Long Stroke Stems ...................................................... 56
4.18.736TR2-X Swap Valve Short Stroke Stems .................................................... 58
4.19.736TR2-X Swap Valve Long Stroke Stems .................................................... 60
5. Spares Dimensions ................................................................................... 62
5.1. Tank and Kettle Valve Flange, Ferrule, Tank Pods Dimensions and Part Numbers ........ 62
5.2. Actuators .......................................................................................... 65
5.3. 761/741 TR Shut-Off TR/TR2 Stems ........................................................... 65
5.4. 700/800 LP Shut-Off Stems ..................................................................... 70
5.5. 700/800 Spherical Shut-Off Stems (replaced by “LP” stems) ................................ 71
5.6. 700/800 Spherical Stems (Replaced by “LP” stems) ......................................... 72
5.7. 700 RA “LP” Stems ............................................................................... 74
5.8. 700/800 LP Divert Stems ........................................................................ 76
5.9. 761/741 Spherical Divert LS (Long Stroke) Stems ............................................ 79
5.10.Bonded TR & TR2 Kettle/Tank Outlet/Tangential Valve Stems ............................... 80
3

1 Safety
Always use Alfa Laval genuine spare parts.
The warranty of Alfa Laval products is dependent on the use of Alfa Laval genuine spare parts.
1.1 Important information
Safety is very important! DO NOT attempt to modify any Alfa Laval product. To do so could create unsafe conditions and void
all warranties. DO NOT place any Tri-Clover product in an application where general product service ratings are exceeded.
The following DANGER, WARNING, and CAUTION signs and their meanings are used within these instructions.
Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. The word Danger is
used in the most extreme cases.
Indicates that special procedures must be followed to avoid damage to the valve.
Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. May also be used to
alert against an unsafe operating or maintenance practice.
CAUTION
Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
4

2 Introduction
2.1 About this manual
This manual is for standard valve assemblies and actuators. A separate service manual is available for the control top module
option. All 700 series valves are compatible with the optional control top module that can provide valve position feedback with
limit switches or proximity sensors, and an integrally mounted solenoid air control valve. Refer to the Control Housings Service
Manual (CTASM) for more information on maintenance and components of the control top module.
IMPORTANT: Throughout this manual, instructions for all valves have been grouped by body type. Refer below to find your valve
body type before continuing to any of the following sections.
SERIES 761 • 741 • 771 VALVES
Shut Off
10, 30, 90
Divert & Reverse Acting
21, 23, 27, 41, 43, 47
Elbow & Kettle
21, 22, 29, 31, 33, 35, 57, 58
Series 762 Shut Off
13, 47, 48, 49, 50, 51, 52, 123
SERIES 762 VALVES
5

2 Introduction
General Information - 761/741 SHUT OFF DIVERT REVERSE ACTING SHUT OFF
Series 761 Available Valve Styles
Each Alfa Laval Inc. Air-Actuated Valve is identified by a model number. The model number consists of five groupings
or coding as shown below:
Sample Valve Part Number:
761 -10M -20L -2-316L
1234 5
1 Valve Series
761 -Molded rubber seat(s)
761TR -PTFE Snap-On seat(s)
761TR2 -PTFE Snap-On seat(s)
2 Body Style/Port Connection*
10M -Lower tee/Tri-Clamp®
21M -Lower tee, Upper tee/Tri-Clamp
23M -Lower cross, Upper tee/Tri-Clamp
27M -Upper tee/Tri-Clamp
30M -Lower cross/Tri-Clamp
41M -Lower cross, Upper tee/Tri-Clamp
43M -Lower cross, Upper cross/Tri-Clamp
47M -Upper cross/Tri-Clamp
3 Actuator Types
10L -Long stroke, normally open
10S -Short stroke, normally open
20L -Long stroke, normally closed
30L -Short stroke, normally closed
30M -Long stroke, air both ways
30S -Short stroke, air both ways
80S -Mid-Position
4PortSize(tubeOD) 1, 1 1/2", 2", 2 1/2", 3", 4"
5 Material 316L Stainless Steel
*“M” designated standard Tri-Clamp port connection. Other port connections are available upon application, e.g. Tri-Weld®, designed by
“W”. Specify the type of port connection required when ordering replacement bodies below.
6

2 Introduction
General Information - 771 THROTTLING
Series 761 Available Valve Styles
Each Tri-Clover Air-Actuated Valve is identified by a model number. The model number consists of five groupings or coding as
shown below:
Sample Valve Part Number:
771S-10M -20 -2-316L
123 45
1ValveSeries
771S -Short Stroke
2 Body Style/Port Connection*
10M -Lower tee/Tri-Clamp®
21M -Lowertee,Uppertee/Tri-Clamp
27M -Upper tee/Tri-Clamp
30M -Lower cross/Tri-Clamp
3 Actuator Types
10 -Normally open
14D -Normally open (positioner) Diaph
14P -Normally open (positioner) Piston
20 -Normally closed
15 -Diaphragm (normally open)
24D -Normally closed (positioner) Diaph (reverse acting only)
24P -Normally closed (positioner) Piston
25 -Diaphragm (normally closed) (Reverse acting only)
4PortSize(tubeOD)
1, 1 1/2", 2", 2 1/2", 3", 4"
5 Material 316L Stainless Steel
*“M” designated standard Tri-Clamp port connection. Other port connections are available upon application, e.g. Tri-Weld®, designed by
“W”. Specify the type of port connection required when ordering replacement bodies below.
7

2 Introduction
General Information - 762 KETTLE • TANK OUTLET • TANGENTIAL
Series 762 Available Valve Styles
Each Tri-Clover Air-Actuated Valve is identified by a model number. The model number consists of five groupings or coding as
shown below:
Sample Valve Part Number:
762 -31M -20L -2-316L
1234 5
1 Valve Series 762
2 Body Style/Port Connection*
Kettle Valves
29M -90° Elbow-Flanged/Tri-Clamp
31M -90° Elbow/Tri-Clamp®
33M -45° Elbow-Flanged/Tri-Clamp
35M -45° Elbow/Tri-Clamp
Tank Outlet Valves
13M -90° Tee-Flanged/Tri-Clamp
21M -90° Elbow/Tri-Clamp
22M -90° Offset Front/Tri-Clamp
57M -90° Elbow-Right Offset/Tri-Clamp
58M -90° Elbow-Left Offset/Tri-Clamp
123M -90° Tee/Tri-Clamp
Tangential Valves
47M -90° Right Hand Outlet/Tri-Clamp
48M -90° Left Hand Outlet/Tri-Clamp
49M -90° Right Hand Outlet-Flanged/Tri-Clamp
50M -90° Left Hand Outlet-Flanged/Tri-Clamp
51M -Cross Body/Tri-Clamp
52M -Cross Body-Flanged/Tri-Clamp
3 Actuator Types
10L -Long stroke, normally open
10S -Short stroke, normally open
20L -Long stroke, normally closed
20S -Short stroke, normally closed
4PortSize(tubeOD) 2", 2 1/2", 3", 4"
5 Material 316L Stainless Steel
*“M” designated standard Tri-Clamp port connection. Other port connections are available upon application, e.g. Tri-Weld®, designed by
“W”. Specify the type of port connection required when ordering replacement bodies below.
8

2 Introduction
General Information - 761 Y-BODY
Series 761 Available Valve Styles
Each Tri-Clover Air-Actuated Valve is identified by a model number. The model number consists of five groupings or coding as
shown below:
Sample Valve Part Number:
761 -90M -20L -2-316L
123 45
1ValveSeries
761 -Molded rubber seat(s)
761TR -PTFE Snap-On seat(s)
2 Body Style/Port Connection*
P0M -Y-Body/Tri-Clamp®
3 Actuator Types
10L -Long stroke, normally open
20L -Long stroke, normally closed
4PortSize(tubeOD) 1 1/2", 2", 2 1/2", 3", 4"
5 Material 316L Stainless Steel
*“M” designated standard Tri-Clamp port connection. Other port connections are available upon application, e.g. Tri-Weld®, designed by
“W”. Specify the type of port connection required when ordering replacement bodies below.
9

3 Maintenance
Always use Alfa Laval genuine spare parts.
3.1 Valve Disassembly
IMPORTANT: Check your air supply before installing this valve. Air-Actuated valves require clean, filtered air to operate properly.
Commonly used air compressors can pickup moisture/humidity in the air, dirt, and oil used in the compressor itself, and pass
them along throughout your system, if not filtered properly. While some newer air compressors are oil-free, many commonly
used are not. In the past few years, compressor manufacturers have switched from standard petroleum based lubricating oils to
SYNTHETIC OILS, as they are thought to make the compressor run more efficiently, and can be changed less often.
However, SYNTHETIC OILS, which can get into the air supply, can cause damage to valve bodies and solenoids, as well as other
processing equipment, by affecting the elastomers and/or plastics that come in contact with the air supply.
Special "coalescing" filter regulators and solenoid guards are commercially available to help avert this potential problem, and
remove oils and other damaging elements from the air downstream from the air compressor. These filters and other components
can be installed downline from the compressor, as well as on control panels, to help minimize the problem, by further cleaning
the air before it gets to your valves and system components. Filter elements should be changed at least once a year, as part
of your normal plant maintenance program.
IMPORTANT: Use C-137 Thread Lubricant actuators.
These lubricants have been formulated especially to ensure trouble free assembly of actuators. C137 is a non-USDA rated
lubricant that helps to prevent thread galling.
How to Use
Before reassembly of any actuator, apply a thin bead of C137 lubricant on the lower threads of the cylinder.
THE C137 LUBRICANT IS NOT INTENDED FOR USE ON VALVE STEM SEALS, BODY GASKET OR ANY PRODUCT CONTACT
SURFACE.
Alfa Laval offers C137 in 1 ounce tubes. For further information refer to your Actuator Service Bulletin, or contact your Alfa
Laval distributor.
To prevent personal injury, keep hands and tools out of and away from valve bodies and stems when applying or releasing air to
an actuator. The actuator stem assembly moves with extreme force and suddenness.
SHUT OFF & DIVERT VALVES
Apply 60 psig air to the air connection on yoke. This will lift the stem from the valve seat. (Normally Closed Valves Only).
Loosen clamp wing nut and remove clamp.
SHUT OFF
Separate the valve body from the valve bonnet and remove body gasket.
DIVERT
Separate the lower valve body from the upper valve body and remove body gasket.
SHUT OFF & DIVERT VALVES
Remove air supply to actuator.
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3 Maintenance
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DIVERT, ELBOW & KETTLE
Apply 60 psig air to the end cap. This will extend the plug away from the valve seat.
Separate the valve stem from the actuator stem. This is done by placing an open end
wrench around the valve stem flats and then turning counter clockwise. Once the
threads between the two stems disengage, pull stem away from the actuator until it
exits the body or bonnet.
Remove air supply to actuator.
Stem
Flats
SHUT OFF
Separate bonnet from yoke by removing three bolts. Remove split bushing and o-ring
from valve bonnet.
Shut Off
DIVERT & ELBOW
DIVERT
Separate upper valve body from yoke by removing three bolts. Remove split bushing,
washer and o-ring from upper body.
ELBOW
Separate elbow valve body from yoke by removing three bolts. Remove split bushing,
sleeve and o-ring from body.
Separate yoke from actuator by removing four bolts. Remove green bushing retainer
and o-ring between yoke and actuator.
Divert & Elbow
SHUT OFF, DIVERT, ELBOW & KETTLE VALVES
Separate green end cap from actuator by removing all four bolts. Remove the two o-rings that are between the end cap and
actuator. Push the clear stem protector out of the end cap and remove o-ring. Pull off red indicator cap from actuator stem.
11

3 Maintenance
Always use Alfa Laval genuine spare parts.
3.2 Valve Component Inspection
VALVE BODY SEAT(s)
Inspect for nicks and scratches and other signs of excessive wear. Leakage past the seat(s) may result from these types of
irregularities.
VALVESTEM&SEAT(S)
Inspect rubber or PTFE seat(s) for signs of cracking, tearing, checking, or excessive wear. Note: Refer to the TR2-Seat
Replacement section for installation of TR Seats. Inspect stem finish for galling, nicks, or scratches. Leakage may result from
these irregularities.
SPLIT BUSHING
Inspect for signs of cracks, nicks, scratches or excessive wear on inside diameter. A worn bushing will not properly align
valve stem.
O-RING(S)
Inspect for cuts, abrasions, flat spots, or other damage that would cause leakage or ineffective cleaning.
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3 Maintenance
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3.3 Valve Assembly
CAUTION
To prevent personal injury, keep hands and tools out of and away from valve bodies and stems when applying or releasing air to
an actuator. The actuator stem assembly moves with extreme force and suddenness.
IMPORTANT: Replace all worn or damaged components as required. Spray stem and o-ring with Sanitary Lubricant. Make sure
all valve bodies are mated properly before securing with clamps. Tighten all clamps securely to assure proper alignment. When
disassembling and assembling valve, bench area should be clean to prevent marking and nicking of seats.
Place all three o-rings into green end cap grooves.
IMPORTANT: When installing largest diameter o-ring, start o-ring in
groove opposite air relief notch and work it in towards notch. Be careful
not to stretch o-ring.
IMPORTANT: 761-90 Y-Body and 4” Long Stroke Valves - stem
protector assembly consist of two pieces plus o-ring.
IMPORTANT: Determine valve operation (Normally Open or Normally
Closed). Push red indicator cap over actuator stem thread.
Place end cap assembly over the actuator stem with red cap. Align the
air port of the end cap with unthreaded thru hole in actuator.
Fasten end cap to actuator with four bolts and lockwashers.
Define the vent plug location and insert in either the end cap or yoke.
Red Cap
Norm. Open
Norm. Closed
Norm. Closed
Norm. Open
Vent
Shut Off & Divert
Elbow & R. Acting
Place o-ring into counter bore above air port on yoke.
Place green bearing retainer into bottom of actuator.
Place actuator onto yoke. Align yoke air port with unthreaded thru hole
in actuator.
Fasten with four bolts and lock washers.
Vent
Nylon Pin
SHUT OFF
Lubricate o-ring with Sanitary Silicone Spray. Insert o-ring and split
bushing into bonnet.
DIVERT AND ELBOW
Lubricate o-ring with Sanitary Silicone Spray. Insert o-ring into body,
place required washer or sleeve on top of o-ring, place split bushing on
top of this component. Fasten bonnet or body to yoke with three bolts
and lock washers.
IMPORTANT: Replace nylon lock before threading valve stem onto
actuator stem, see section TYPE 10, 20 & 30 Actuator.
Shut Off Divert & Elbow
DIVERT AND ELBOW
Apply 60psig air to actuator - (Normally Open Divert and Normally Closed Elbow Valves Only).
SHUT OFF, DIVERT, ELBOW & KETTLE
Push valve stem through bonnet until it meets the actuator stem. Partially thread valve stem onto actuator stem by hand until
nylon lock resistance is felt. Apply an open end wrench over the valve stem flats, turn clock wise and tighten until valve
stem meets actuator stem shoulder.
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3 Maintenance
Always use Alfa Laval genuine spare parts.
Place gasket in body groove and clamp together. Cycle valve at least 6 times. Operate all valves after assembly to be sure they
are operating correctly. Inspect all air line connections for leaks.
3.4 TR and TR2 Stem/Seat Assembly
REMOVALOFPTFESNAP-ONSEAT
1. Refer to valve disassembly section to remove stem / seat assembly from valve.
2. Using a knife, partially cut through the upper ring portion of Snap-On Seat, avoiding
contact with stainless steel stem. Grasp both cut ends of Snap-On Seat and force
apart for removal from Stem. Since there are no slots, the TR2 seat will require cutting
through sides and base of seat.
INSTALLATION OF REPLACEMENT PTFE SNAP-ON SEAT
The Alfa Laval replacement Snap-On Seats do not require heat or special tools for proper
installation. Snap-On Seats are installed by applying uniform pressure on all sides. Pressure
can be applied by using a Tri- Clamp or Bevel Seat ferrule the same size as the valve.
Due to the greater force required to instal the TR2 style seat, we recommend using a TR2
seat tool. This holds the seat more securely and can also be used on standard TR seat
installation. See parts list for tool numbers.
SHUT OFF VALVE OR LOWER SEAT OF DIVERT VALVE
1. Place Snap-On Seat on the lower portion of the stem.
2. Place assembly from Step 1 on Tri-Clamp or Bevel Seat ferrule, resting on a hard flat
surface such as a bench or table.
3. Apply firm even downward pressure on the stem until the Snap-On Seat hits the
shoulder of the stem and snaps into place.
4. . Examine seat assembly to be sure each individual tab is secure under the smaller lip
portion of the stem. Press tabs down with your fingers or a straight edge. Holding
Stem/Seat Assembly in one hand, rotate the Snap-On Seat. For proper CIP cleaning
the seat should turn freely on the stem.
5. Refer to valve assembly section for reassembly.
UPPER SEAT OF DIVERT VALVE
1. Place Snap-On Seat on the upper portion of the stem.
2. Place Tri-Clamp or Bevel Seat ferrule on top of assembly, resting on a hard, flat surface
such as a bench or table.
3. Apply firm, even, downward pressure of Tri-Clamp or Bevel Seat ferrule until Snap-On
Seat hits the shoulder of the stem and snaps into place.
4. Examine Seat Assembly to be sure individual tab is secure under the smaller lip portion
of the stem. Press tabs down with your fingers or a straight edge. Holding Seat
Assembly in one hand, rotate the Snap- On Seat. For proper CIP cleaning, seat should
turn freely on the Stem.
5. Refer to valve assembly section for assembly.
Cut here
to remove
seat.
Lip Straight
Edge
Push Tab Here Up
Shoulder
Lower Portion
Tri-Clamp or Bevel Seat
Ferrule to be same size
as valve
Upper Portion
Tri-Clamp or Bevel Seat
Ferrule to be same size
as valve
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3 Maintenance
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3.5 Type 10, 20, and 30 Actuator
INTRODUCTION
This section covers servicing of the following actuators: Type 10L - 10S (normally open), Type 20L - 20S (Normally Closed) Long
and Short, and Type 30L - 30S (Air Both Ways).
The 10 and 20 actuators are identical; with spring return operation. The change in description is for describing the mode of
operation when coupled to a valve. “10” defines normally open (air to lower) and “20” defines normally closed (air to close)
operation, but physically they are the same. Type 30 is a double acting actuator that is identical to the 10/20 except it does not
contain a spring. These actuators will require minimum maintenance over many years of service.
IMPORTANT:
Additional air supply must be relieved when product pressure is not present. Failure to do so will result in pressure damage
to the seat.
When using additional air loading it should exceed the minimum required by no more than 3 to 5 psig.
Valve Size *Add’l Air
Pressure
Add’l Air
Pressure
Maximum
Maximum
Product
Holding
Pressure
1 1 10 200
11/2 15200
2 2 10 150
21/2 320100
331/2 35 100
4h 530 100
4 1560100
WARNING
To prevent personal injury, do not attempt to cut the actuator open. The
actuator spring is compressed and under load.
Air pressure measured in psig.
*Additional air pressure required to hold against 10
psig product pressure.
INSTALLATION
Connect air supply to the 1/8-27 FNPT port(s) located on the green end cap or yoke. Air supply specifications: 60 to 80
psig for spring return (Type 10 & 20); 35 psig for double acting (Type 30). Refer to table at right if additional product holding
pressure is required on normally closed Type 20 actuators.
Bushing/Packing Replacement
Bushings guide the actuator stem while packings provide sealing around the stem. The bushing and packing should both be
replaced if one or the other fails. Even if only one end fails both ends of the actuator should be serviced. Disconnect and remove
actuator completely from valve before proceeding with the steps that follow, see Valve Disassembly.
Step 1
Remove end cap from actuator. Separate clear stem protector
from the end cap. Fasten the end cap without stem protector to
one end of the actuator.
CAUTION
To prevent personal injury, keep hands and tools out of and away
from valve bodies and stems when applying or releasing air to an
actuator. The actuator stem assembly moves with extreme force
and suddenness.
CAUTION
To prevent personal injury, do not attempt to remove the bushing
or packing without the endcap fastened to the actuator. The
packing and bushing will be forced out of the actuator under air
pressure and will be trapped by the end cap.
Air
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3 Maintenance
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Step 2
Apply 60 psig air to end cap. The packing and bushing will be
forced out of their counter bores, which will result in an air leak.
Step 3
Remove air supply once the bushing and packing are forced out.
Step 4
Remove end cap, bushing, and packing from the actuator and repeat at other end of actuator.
Step 5
Place red indicator cap over the actuator stem threads.
Step 6
Wipe stem clean. Lubricate new packings with C137 lubricant.
Step 7
Slide new packing over the red indicator cap/stem with the "v" side facing the actuator. Partially insert packing into smallest
counter bore using a flat tool to assist the outer lip DO NOT DAMAGE OR ROLL THE PACKING LIP DURING INSTALLATION.
Step 8
Remove the red indicator cap. Place bushing on top of the packing. Push on the bushing until outer flange is flush with
the actuator.
Step 9
Repeat to the other end of the actuator.
ACTUATOR STEM NYLON LOCK REPLACEMENT
The Nylon Locking Pin located in the middle of the stem thread keeps the valve stem from becoming loose due to vibrations.
After every disassembly, the nylon locking pin must be replaced. Punch out the old nylon pin with an 1/8 inch or smaller
diameter punch. Insert a new nylon locking pin.
ACTUATOR LUBRICATION
For optimum performance, lubricate once annually. Inject C137 or STP oil treatment into the unthreaded thru hole in each end of
the actuator. Roll actuator on a flat surface repeatedly to obtain uniform coverage of lubricant. Do not over lubricate. This is
not a remedy for actuator failure.
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3 Maintenance
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3.6 Type80Actuator
INTRODUCTION
Type 80 is a three position actuator that will require minimum maintenance. It is similar to the Type 10 & 20 spring return
actuators except for a mid position adjustment assembly. Installation, adjustment, maintenance, partial disassembly, and
assembly instructions are covered below.
INSTALLATION
Connect air supply to the two 1/8-27 FNPT ports. Each port is identified permanently to indicate operation. MID — air supply
causes actuator to extend to mid position. FULL — air supply causes actuator to extend fully. Air Supply Specification:
60 - 80 psig.
ADJUSTMENT
There is one adjustment and it sets the mid position stop. This stop determines the length of mid position stroke.
Step 1
Loosen four end cap bolts until plastic adjustment knob can be turned by hand.
Step 2
Turn plastic knob as described below for required action. COUNTERCLOCKWISE — Increase Stroke, CLOCKWISE — Decrease
Stroke.
Step 3
Tighten four end cap bolts.
BUSHING/PACKING REMOVAL
The valve end contains one bushing and packing identical to Type 10, 20, and 30 actuators. They are located on the valve
end of the actuator.
Step 1
Disassemble the actuator from the valve completely.
Step 2
Assemble the yoke to the actuator without the green bushing retainer. Assemble the valve stem to the actuator stem.
CAUTION
To prevent personal injury, DO NOT attempt to remove the packing and bushing without the valve stem threaded onto the
actuator stem. The stem is required because the packing and bushing will be forced out of the actuator under air pressure and
will be trapped by the valve stem.
Step 3
Apply 60 psig to the yoke. The packing and bushing will be forced out which will result in an air leak. Remove air supply
once the bushing and packing are forced out.
Step 4
Remove the valve stem & yoke.
BUSHING / PACKING REPLACEMENT, NYLON LOCK REPLACEMENT AND LUBRICATION
IMPORTANT: The TYPE 80 actuator does not have a red indicating cap like the type 10, 20 or 30 actuator. Cover the actuator
stem threads with tape to protect the new bushing and packing from damage during assembly. See Type 10, 20, AND 30
Actuator Maintenance.
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3 Maintenance
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Disassembly
Step 1
Separate adjustment knob and cover plate by removing four bolts.
Step 2
Remove E-ring and unscrew adjustment nut from actuator stem completely.
Step 3
Remove spacer, end cap, bushing, retainer, and o-ring from actuator.
Assembly
Step 1
Lubricate o-ring with L1011 Sanitary Silicone Spray. Insert o-ring, retainer, and bushing into actuator.
Step 2
Install three o-rings into end cap. Place end cap over actuator stem aligning air port labeled MID with unthreaded thru hole in
actuator.
Step 3
Place spacer on top of end cap, screw adjusting nut on actuator stem, and install E-ring in groove on actuator stem.
Step 4
Align adjustment knob slots with adjustment nut. Slide cover over spacer.
Step 5
Place cover plate over adjustment knob and fasten with four bolts and lock washers.
3.7 Type 15 And 25 Actuator
INTRODUCTION
This actuator is a spring return diaphragm unit designed to utilizes a diaphragm for reduced friction. It can be completely
disassembled and rebuilt using Tri-Clover Replacement parts. Installation, maintenance, disassembly, and assembly instructions
are covered below.
INSTALLATION
Connect air supply to coupler. Air Supply Specifications: 35 - 50 psig (Normal)
DIAPHRAGM REPLACEMENT
The diaphragm can rupture. When it fails air will leak from the actuator vent plug. Follow the disassembly and assembly
instructions below.
IMPORTANT: The bushing and packing must be replaced if a diaphragm fails.
BUSHING/PACKING REMOVAL
The valve end contains one bushing and packing identical to Type 10, 20, and 30 actuators.
They are located on the valve end of the actuator.
Step 1
Disassemble the actuator from the valve completely.
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Step 2
Assemble the yoke to the actuator without the green bushing retainer. Assemble the valve stem to the actuator stem.
CAUTION
To prevent personal injury, DO NOT attempt to remove the packing and bushing without the valve stem threaded onto the
actuator stem. The stem is required because the packing and bushing will be forced out of the actuator under air pressure and
will be trapped by the valve stem.
Step 3
Apply 60 psig to the yoke. The packing and bushing will be forced out which will result in an air leak. Remove air supply
once the bushing and packing are forced are forced out.
Step 4
Remove the valve stem and yoke.
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3 Maintenance
Always use Alfa Laval genuine spare parts.
BUSHING / PACKING REPLACEMENT, NYLON LOCK REPLACEMENT AND LUBRICATION
IMPORTANT: The TYPE 15/25 actuator does not have a red indicating cap like the type 10, 20 or 30 actuator. Cover the
actuator stem threads with tape to protect the new bushing and packing from damage during assembly. See TYPE 10, 20,
AND 30 ACTUATOR MAINTENANCE.
DISASSEMBLY
Actuator spring is not contained. Although preload force is low, caution must
be used when spring force is released. Hand pressure must be applied to the
cylinder top restricting its travel. Completely remove the actuator from the valve
and follow the steps below.
1. Insert four bolts into bonnet and clamp into vise as illustrated in Figure 2
2. Remove air coupler adapter and nut by turning counterclockwise.
3. Remove actuator cylinder from bonnet by applying a strap wrench to the
cylinder and turn counter clockwise completely two times.
CAUTION
To prevent injury, apply constant hand pressure and unscrew completely. Spring
force will push the cylinder up when threads disengage. See Figure 2.
4. Pull cylinder assembly off the bonnet and remove spring.
5. Separate diaphragm assembly from cylinder by holding cylinder and pulling
on actuator stem.
6. Place diaphragm assembly into a vise and secure Inner Diaphragm Guide
as illustrated in Figure 3. Do Not over tighten. Remove stem by locating a
wrench around the flats and turn counter clockwise. Remove adapter and
nut. The nut may be removed by inserting a punch into the hole in its face,
and tapping nut counter clockwise.
7. Remove diaphragm assembly from vise and separate.
Figure 2
Figure 1
Figure 3
Hole
Apply constant
hand pressure
when unscrewing.
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