Flowserve V901 VariCool Desuperheater Manual de usuario descargar pdf (Pagina 7)

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4 Trouble shooting

Defect

No.

Possible cause

Remedy

Spindle does not move

1.1

1.2

1.3

1.4

1.5

1.6

• no aux. energy supply (

pneumatic air or electrical power

) to actuator and accessories (

solenoid valve, filter reducing

station, positioner, limit switch

and special accessories )

• the fitted accessories do not

work

• the pneumatic actuator is

defective

• the electrical actuator is

defective

• excessive tightening of the

stuffing box packing

• Valve trim worn, stuck

• pneumatic actuators: check supply

line for leaks; check pressure (

usually 6 bar )

• electrical actuators: check power

supply (connections, circuit breakers,

voltage)

• see maintenance and operating

instructions of accessories

manufacturer

• contact customer service

departement or contract partner

• see maintenance and operating

instructions of actuator manufacturer

• loosen stuffing box packing nuts until

valve operates properly

Caution: make sure there are no leaks !

• contact customer service

departement or contract partner

Jolting spindle movement

2.1

2.2

2.3

• dirty spindle

• damaged spindle

• actuator not powerful enough

•

clean spindle with suitable cleaning

agent

• contact customer service department

or a contract partner

• compare actuator specs on the

rating plate with operation

specifications of the facility - if

incompatible, contact customer

service department or contract

partner

Spindle travel less than full

stroke

( 0 to 100% stroke )

3.1

3.2

3.3

3.4

3.5

• air supply pressure too low

• pneumatic actuators: bad hand

wheel position (hand wheel

emergency operation)

• electrical actuators: limit switch

misadjusted

• badly adjusted or defective

positioner

• foreign particles in valve seat,

damaged trim

• provide air at the pressure stated on

the rating plate

• take hand wheel to limit position

• readjust limit switch to actuator manu

facturer`s specifications

• readjust positioner to positioner

manu facturer`s specifications

• contact customer services

department or contract partner

1 2 3 4 5 6 7 8 9 10 11 12 ... 15 16

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