Alfalaval Tri-Clover 741 Series Bedienungsanleitung

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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 Alfa Laval, 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 ...............................................................................................5

INTRODUCTION

ABOUT THIS MANUAL........................................................................................................................6

MAINTENANCE

VALVEDISASSEMBLY ........................................................................................................................7

VALVEDISASSEMBLY ........................................................................................................................ 8

VALVE COMPONENT INSPECTION...................................................................................................9

VALVEASSEMBLY ............................................................................................................................ 10

"TR" STEM/SEAT ASSEMBLY........................................................................................................... 12

TYPE 10, 20, AND 30 ACTUATORS..................................................................................................13

TYPE 80 ACTUATOR......................................................................................................................... 15

TYPE 15 AND 25 ACTUATOR ........................................................................................................... 17

PARTS LIST

761/741 SHUT OFF • DIVERT • REVERSE ACTING SHUT OFF .................................................... 20

771 THROTTLING.............................................................................................................................. 22

762 KETTLE • TANK OUTLET • TANGENTIAL................................................................................. 24

761Y-BODY........................................................................................................................................ 26

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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

maintenancepractice.

CAUTION

Indicates a potentially hazardous situation which, if not

avoided,

could

result in death or serious injury.

IMPORTANTSAFETYINFORMATION

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.

WARNING

SPRING UNDER LOAD

DO NOT ATTEMPT TO CUT ACTUATOR OPEN

REFER TO SERVICE BULLETIN

Part Number 38-228

WARNING

HAZARDOUS VOLTAGE

DISCONNECT POWER

BEFORE SERVICING

Part Number 38-294

WARNING

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

ABOUTTHISMANUAL

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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. 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

yournormalplantmaintenanceprogram.

IMPORTANT: Use C-137ThreadLubricant 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.

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.

THE C137 LUBRICANT IS NOT INTENDED FOR USE ON VALVE STEM SEALS, BODY GASKET

ORANYPRODUCTCONTACTSURFACE.

Tri-Clover offers C137 in 1 ounce tubes. For further information refer to your Tri-Clover®Actuator

Service Bulletin, or contact your Alfa Laval distributor.

MAINTENANCE

VALVEDISASSEMBLY

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SHUTOFF&DIVERTVALVES

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.

SHUTOFF&DIVERTVALVES

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

anopenendwrench aroundthevalve stemflatsand thenturningcounter

clockwise. Oncethethreadsbetweenthetwostemsdisengage,pullstem

away from the actuator until it exits the body or bonnet.

Remove air supply to actuator.

SHUTOFF

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.

SHUTOFF,DIVERT,ELBOW&KETTLEVALVES

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

VALVEDISASSEMBLY

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.

DIVERT

ELBOW

SHUT OFF

Shut Off Divert & Elbow

Stem

Flats

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MAINTENANCE

VALVECOMPONENTINSPECTION

✓✓

✓VALVEBODYSEAT(s)

Inspect for nicks and scratches and other signs of excessive wear. Leakage past

the seat(s) may result from these types of irregularities.

✓✓

✓VALVE STEM & 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.

✓✓

✓SPLITBUSHING

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

ineffectivecleaning.

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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: Replaceall worn or damaged componentsas 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.

Vent

Red Cap

Norm. Open

Norm. Closed

Norm. Open

Vent

Shut Off & Divert

Elbow & R. Acting

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