Flowserve WK70 Series Manuel d'utilisateur télécharger pdf

Worcester Controls

CAUTION: Flowserve recommends that this product be stored

indoors prior to installation, in an environment suitable for human

occupancy. Avoid areas where exposure to relative humidity above

85%, acid or alkali fumes, radiation above normal background,

ultraviolet light, or temperatures above 1200°F/below 400°F may

occur. Do not store within 50 feet of any source of ozone.

A. INSTALLATION

1. WK70/WK74 valves may be installed for flow or vacuum in either

direction. Use care to exclude pipe sealants from the valve cavity.

Valves with upstream relief hole in ball (V3 option) are directional

(one-way) valves.

2. Weld End Valves:

Prior to welding or brazing, ENSURE ALL JOINT SURFACES ARE

CLEAN, to prevent contamination. Valves with XBO pipe ends can

be welded in the line without disassembly of the valve.

3. CAUTION:

a. With the exception of valve seats, no fluoropolymer parts are

reusable.

b. Special care should be taken to avoid scratching the

fluoropolymer seals during installation. Light lubrication of

these seals can help to prevent damage.

c. WK70/WK74 valves and repair kits have been assembled,

cleaned, and packaged for ultra-high purity systems. Caution

should be used to maintain the cleanliness of the valve parts.

d. WK70/WK74 valves are factory assembled with NO

lubrication.

B. OPERATION

1. Valve operation consists of turning the handle a quarter-turn

clockwise to close and a quarter-turn counter-clockwise to open.

The valve is open when the handle and/or stem flats are in line

with the pipeline. WK70/WK74 valves may be automated (used

with actuators).

2. These valves will provide bubble-tight shut-off when used in

accordance with Worcester’s published pressure/temperature

chart.

3. It is not good practice to leave a ball valve partly open (throttling

operation) without knowledge of the pressure drop and flow at

that position.

4. Media that can solidify, crystallize or polymerize should not be

allowed to stand inside ball valve cavities.

5. Torque Requirements - Operating torque requirements will vary

depending on the length of time between cycles, line pressure,

type of valve seats, or the media in the piping system. For a

detailed analysis of valve torque requirements, refer to the

Worcester Actuator Sizing Manual.

C. MAINTENANCE

Tighten the retaining nut if leakage is visible in the stem area.

CAUTION: Over-tightening stem nuts results in high operating

torque and shorter stem seal life. Follow proper stem adjustment

procedure below.

For Manual Valves (with two stem nuts):

1. Tighten retaining nut (lower nut) clockwise until Belleville washers

are “bottomed-out” flat.

2. Back off the retaining nut

6 of a turn.

3. Tighten handle nut securely to lock retaining nut in place.

For Automated Valves (with one self-locking stem nut):

1. Tighten self-locking stem nut until Belleville washers are “bottom-

out” flat.

2. Back off nut

3 of a turn. NOTE: The self-locking nut requires a

good amount of effort to tighten. Ensure that Belleville washers

are fully compressed flat before backing off.

12630-B

Tube Bore Clean Valves

2" – 2" WK70 and

2" – 2" WK74

Installation, Operation and Maintenance Instructions

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Résumé du contenu

Page 1 - Worcester Controls

Worcester ControlsCAUTION: Flowserve recommends that this product be storedindoors prior to installation, in an environment suitable for humanoccupanc

Page 2 - D. REBUILDING

Flow Control DivisionWorcester ControlsD. REBUILDINGa WARNING: BALL VALVES CAN TRAP PRESSURIZED FLUIDSINSIDE THE BALL CAVITY WHEN CLOSED.If the valve

Page 3 - VALVE ASSEMBLY

Flow Control DivisionWorcester ControlsAUTOMATEDMANUALSTEMSELF–LOCKING NUTBELLEVILLE WASHERS–4STEM SEAL(.030 POLYFIL)STEM SEAL(.050 POLYFIL)STEM SEAL(

Page 4

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