User Manual

ManualsBrandsLeslie Controls ManualsEquipmentCONTROL VALVES SINGLE PORTED DOS

Installation, Operation

and Maintenance

10/1.5.1

Rev. 0

CONTROL VALVES

SINGLE PORTED

CLASSES DL, DDL, DOS, DDOS

NOTE 1: Where noise is a factor follows recommendations for piping and fittings per 5/0.3.1.

TABLE OF CONTENTS

INSTALLATION

.............................................................................................................................. 2

VALVE POSITION ......................................................................................................................................... 2

PROBLEM PREVENTING PROCEDURES .......................................................................................................... 2

OPERATION

....................................................................................................................................... 2

MAINTENANCE

.............................................................................................................................. 3

REPLACING VALVE PLUG STEM PACKING ................................................................................................... 3

DISMANTLING..............................................................................................................................................3

TO INSTALL A COMPLETE SET OF PACKING ................................................................................................. 3

REMOVING ACTUATOR FROM VALVE BODY ASSEMBLY..............................................................................3

VALVES FITTED WITH CAGE TYPE TRIM (O IN CLASS) ................................................................................4

REPLACING SEAT RING(S)/INSERTS ............................................................................................................. 4

TO INSTALL SEAT RING(S)/INSERTS.............................................................................................................4

INSPECTION, CLEANING, REWORKING OR REPLACEMENT OF PARTS............................................................4

ORDERING PARTS ........................................................................................................................................4

CLEANING....................................................................................................................................................4

LAPPING IN VALVE PLUG AND SEAT RING(S)/INSERT ..................................................................................5

CONTROL VALVES FITTED WITH CAGE TYPE TRIM ..................................................................................... 5

REASSEMBLY- SINGLE PORTED CONTROL VALVES (DL TYPE) ...................................................................5

CAGE TYPE TRIM (DOS TYPE CTRIM PARTS) (SEE FIG. 3)........................................................................... 5

ADJUSTING ACTUATOR SPRING PRELOAD (STARTING PRESSURE)...............................................................6

SINGLE PORTED UNBALANCED CONTROL VALVES (DL, DOS TYPES) ........................................................6

SINGLE PORTED CONTROL VALVES (DDL, DDOS TYPES)..........................................................................6

ADJUSTED CONTROL VALVE FOR RATED TRAVEL.......................................................................................6

SINGLE PORTED UNBALANCED (DL, DOS TYPES) ......................................................................................6

SINGLE PORTED UNBALANCED CONTROL VALVES (DDL, DDOS TYPES) .................................................. 7

ACTUATOR MAINTENANCE REPLACING DIAPHRAGMS, STEM

SEALS, ETC.

....................................................................................................................................... 7

REASSEMBLY...............................................................................................................................................7

ALL ACTUATORS .........................................................................................................................................8

TO CHANGE VALVE ACTION FROM NORMALLY OPEN TO NORMALLY CLOSED OR VICE-VERSA ................ 8

12501 Telecom Drive, Tampa Florida 33637

Summary of content (12 pages)

PAGE 1
Installation, Operation and Maintenance 10/1.5.1 Rev. 0 12501 Telecom Drive, Tampa Florida 33637 CONTROL VALVES SINGLE PORTED CLASSES DL, DDL, DOS, DDOS TABLE OF CONTENTS INSTALLATION ..............................................................................................................................2 VALVE POSITION .........................................................................................................................................2 PROBLEM PREVENTING PROCEDURES .............
PAGE 2
Illustration Index Figure 1 - Typical Installation .........................................................................................................................3 Figure 2 - Typical Control Valve Station for Control of Compressible Fluids at 25% or Less of Inlet Pressure .................................................................................................................................................................3 Figure 3 - Cage Trim (DOS Type) ..................................
PAGE 3
bonnet or paint it other than dull black, otherwise its heat emitting efficiency will be impaired and packing will be submitted to excessive temperature. INSTALLATION Valve Position (see Fig. 1) CAUTION! Install control valve in the highest horizontal line of piping, in an accessible location and with arrow on side of valve body in direction of fluid flow. Control valve may be placed in any position, but upright is preferable for ease of maintenance.
PAGE 4
diaphragm. Rated travel is shown by position of travel indicator on valve stem relative to travel indicator scale on yoke. 3. Manually operate control valves fitted with manual operating devices through rated travel to check freedom of movement. 4. Place control valve in operation in accordance with instructions furnished with control pilot or other operating device.
PAGE 5
Removing Actuator from Valve Body Assembly Valves Fitted with Cage Type Trim (O in Class) Direct Acting Actuator: (See Fig.3) Trim components are: Seat retaining guide/cage (48), seat ring/insert (51) and seat ring/insert gasket (50). Body gasket (47), seat retaining guide/cage (48), valve plug guide and throttling sector will come out along with valve plug. Disassemble parts when removing valve plug from bonnet. Loosen valve plug stem nut (29).
PAGE 6
All Leslie control valves are made of the finest material obtainable, time-tested and backed by over 100 years of know-how. Machining is done by an expert craftsmen and each valve is inspected and service tested before shipment to you. Use of other than genuine Leslie parts may impair their ability to serve you. Leslie parts are held to very close tolerance to eliminate field machining and grinding on valve and seat ring/inserts or reaming on (valve plug guide bushings).
PAGE 7
valve plug stem when lapping. Weight of parts is sufficient to cause lapping action. Reassembly- Single Ported Control Valves (DL Type) 4. Place lapping compound on valve plug face. (See Fig. 4) 5. As lapping progresses lift valve plug off seat occasionally and rotate 45° to keep compound evenly distributed. 1. After all parts have been cleaned and prepared for reassembly, place gasket (47) on bottom cap (flange) (48). 6. Remove all traces of compound after lapping. 2.
PAGE 8
3. Place new gasket (50) in recess in valve body. spring must be sufficient to provide the 3 psig preload plug force required to close the valve. 4. Follow with seat ring/insert (51), with valve plug seating face toward bonnet end of body. 5. Position seat retaining guide (48) on seat ring/insert. If preload adjustment is made with no pressure in valve body, when the control valve is placed in operation, additional compression must be placed on the actuator spring to provide valve closure force.
PAGE 9
plug away from seat ring/insert(s). Then turn valve plug stem one full turn out of actuator stem threads until valve plug just contacts seat ring/insert again. Dismantling – SIZES 35, 55, 85, 135 (See Fig. 8) Direct Acting (See Page 9, Valve Action) Remove bolts/nuts (23/22), upper diaphragm case (20) and old diaphragm (21).
PAGE 10
Reassemble spring adjuster (40), washer (39), actuator spring (36), top spring seat (30) to actuator stem (35) (If they have been removed). Replace assembled parts in yoke (34). Place stem seal collar (31) on actuator stem (35). Reassemble spacer (33) to yoke in 135R. Position stem seal collar (31) on actuator stem (35). In sizes 55R, 85R and 135R place bead of stem seal in recess of stem seal collar. In 35R and 135R actuators reassemble lower diaphragm base (21) to yoke (34).
PAGE 11
travel. For more detailed instruction consult general instruction pertaining to the particular type of control valve. SOME IMPORTANT NOTES FLAT SHEET RUBBER MATERIAL Flat sheet rubber material may be used in 55R, 85R and 135R actuators as emergency replacement material but for guaranteed results it should be replaced at the earliest opportunity with the LESLIE ROLLING ACTION DIAPHRAGM designed specifically for these actuators. When flat material is used in emergency preform as described below.
PAGE 12
It is solely responsibility of system designer and user to select products and materials suitable for their specific application requirements and to ensure proper installation, operation and maintenance of these products. Assistance shall be afforded with selection of materials based on technical information supplied to Leslie Controls Inc.; however, system designer and user retain final responsibility.