Tri-Clover 741 Series Manuale utente
761VSM
Tri-Clover®
Air-Actuated Valves
Series 741, 761, 762, & 771
Service & Installation Manual
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CONTENTS
Thank you for purchasing a Tri-Clover Product!
This manual contains disassembly and assembly instructions, maintenance procedures, and a
complete parts list for all 761, 741, 762, 771 Air Actuated Valves, designed and manufactured by
Tri-Clover, Inc., Kenosha, Wisconsin.
READ THIS MANUAL
carefully to learn how to service these valves. Failure to do so could
result in personal injury or equipment damage.
SAFETY
IMPORTANT SAFETY INFORMATION ................................................................................................. 3
INTRODUCTION
ABOUT THIS MANUAL ........................................................................................................................ 4
MAINTENANCE
VALVE DISASSEMBLY ......................................................................................................................... 5
VALVE DISASSEMBLY ......................................................................................................................... 6
VALVE COMPONENT INSPECTION ................................................................................................... 7
VALVE ASSEMBLY ............................................................................................................................... 8
"TR" STEM/SEAT ASSEMBLY ............................................................................................................ 10
TYPE 10, 20, AND 30 ACTUATORS ...................................................................................................11
TYPE 80 ACTUATOR ......................................................................................................................... 13
TYPE 15 AND 25 ACTUATOR ............................................................................................................ 15
PARTS LIST
761/741 SHUT OFF • DIVERT • REVERSE ACTING SHUT OFF ...................................................... 18
771 THROTTLING .............................................................................................................................. 21
762 KETTLE • TANK OUTLET • TANGENTIAL .................................................................................. 24
761 Y-BODY ........................................................................................................................................ 27
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SAFETY
DANGER
WARNING
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 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.
IMPORTANT SAFETY INFORMATION
The SAFETY LABEL below is placed on every valve. Do not remove any labeling on any Tri-Clover
product. Immediately replace any label that is missing.
WA R N I N G
SPRING UNDER LOAD
DO NOT ATTEMPT TO CUT ACTUATOR OPEN
REFER TO SERVICE BULLETIN
Part Number 38-228
WA R N I N G
HAZARDOUS VOLTAGE
DISCONNECT POWER
BEFORE SERVICING
Part Number 38-294
WA R N I N G
SPRING UNDER LOAD
ACTUATOR CYLINDER MAY EJECT WITH SUFFICIENT FORCE TO
CAUSE SERIOUS INJURY. REMOVE ACTUATOR FROM VALVE BEFORE
DISASSEMBLING ACTUATOR. REFER TO SERVICE BULLETIN.
Part Number 38-264
(for diaphragm actuator)
Safety is very important!
DO NOT attempt to modify any Tri-Clover 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.
!
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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.
INTRODUCTION
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
ABOUT THIS MANUAL
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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. One source that we are aware of is Wilkerson Corp. of Englewood, Colorado (telephone
303-761-7601). 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 only C-137 Thread Lubricant and OCP-VI Seal Lubricant on Tri-Clover®
actuators.
These lubricants have been formulated especially to ensure trouble free assembly of Tri-Clover®
actuators. C137 is a non-USDA rated lubricant that helps to prevent thread galling. OCP-VI is USDA
H2 rated and is an excellent lubricant for the piston.
How to Use
Before reassembly of any Tri-Clover®actuator, i.e. 761, 361, 161, etc., apply a thin bead of C137
lubricant on the lower threads of the cylinder. Lightly coat the O.D. of the piston packing and felt ring
with OCP-VI. On actuators with valve positioners, place a light bead of C137 on the lower threads of
the positioner housing.
THE C137 LUBRICANT IS NOT INTENDED FOR USE ON ACTUATOR PISTON SEALS, STEM
THREADS, OR ANY OTHER UNSPECIFIED USE.
Tri-Clover now offers OCP-VI in 1/4and 8 ounce tubes and C137 in 1 ounce tubes. For further
information refer to your Tri-Clover®Actuator Service Bulletin, or contact your Tri-Clover distributor.
MAINTENANCE
VALVE DISASSEMBLY
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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.
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.
SHUT OFF
Separate bonnet from yoke by removing three bolts. Remove split
bushing and o-ring from valve bonnet.
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.
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.
MAINTENANCE
VALVE DISASSEMBLY
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.
Shut Off Divert & Elbow
Stem
Flats
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MAINTENANCE
VALVE COMPONENT INSPECTION
3
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.
3
VALVE STEM & SEAT(S)
Inspect rubber or PTFE seat(s) for signs of cracking, tearing, checking, or excessive
wear. Note: Refer to the
TR-Seat Replacement
section for installation of TR Seats.
Inspect stem finish for galling, nicks, or scratches. Leakage may result from these
irregularities.
3
SPLIT BUSHING
Inspect for signs of cracks, nicks, scratches or excessive wear on inside diameter. A
worn bushing will not properly align valve stem.
3
O-RING(S)
Inspect for cuts, abrasions, flat spots, or other damage that would cause leakage or
ineffective cleaning.
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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 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 lock
washers.
Define the vent plug location and insert in either the end
cap or yoke.
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.
MAINTENANCE
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.
VALVEASSEMBLY
IMPORTANT: Replace all worn or damaged components as required. Spray stem and o-
ring with Tri-Clover L-1011 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.
Vent
Red Cap
Norm. Open
Norm. Closed
Norm. Closed
Norm. Open
Vent
Shut Off & Divert
Elbow & R. Acting
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SHUT OFF
Lubricate o-ring with Tri-Clover L1011 Sanitary Silicone Spray.
Insert o-ring and split bushing into bonnet.
DIVERT AND ELBOW
Lubricate o-ring with Tri-Clover L1011 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
.
MAINTENANCE
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.
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.
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MAINTENANCE
"TR" STEM/SEAT ASSEMBLY
REMOVAL OF PTFE SNAP-ON SEAT
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.
INSTALLATION OF REPLACEMENT PTFE SNAP-ON SEAT
Tri-Clover’s 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.
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.
Cut here
to remove
seat.
Lip Straight
Edge
Push Tab Here Up
Tri-Clamp or Bevel Seat
Ferrule to be same size
as valve
Shoulder
Lower Portion
Tri-Clamp or Bevel Seat
Ferrule to be same size
as valve
Upper Portion
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