Name: Flowserve Valtek Mark One
Brand: Flowserve
Rating: 4 (1 reviews)

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Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611

Troubleshooting Chart

Problem Probable Cause Corrective Action

Stem motion 1. Overtightened packing 1. Adjust packing box nuts to slightly over finger-tight

impeded 2. Service temperature is beyond 2. Reconfirm service conditions and contact factory

operating limits of trim design

3. Inadequate air supply 3. Check for leaks in air supply or instrument signal

system; tighten loose connections and replace

leaky lines

4. Malfunctioning positioner 4. Refer to positioner maintenance instructions

Excessive 1. Improperly tightened bonnet 1. Refer to step 3 of “Reassembling the Body”

leakage flange bolting section for correct tightening procedure

2. Worn or damaged seat ring 2. Disassemble valve and replace or repair seat ring

3. Worn or damaged seat or 3. Disassemble and replace gaskets

bonnet gasket

4. Inadequate actuator thrust 4. Check for adequate air supply to actuator; if air

supply is adequate, reconfirm service conditions

and contact factory

5. Incorrectly adjusted plug 5. Refer to steps 8 - 10 of “Reassembling the Body”

section for correct plug adjustment

6. Improper flow direction 6. Refer to original specifications or contact factory

7. Improper handwheel adjustment 7. Adjust handwheel until plug seats properly

acting as a limit-stop

Inadequate 1. Improper plug adjustment, 1. Refer to steps 8 - 10 of “Reassembling the Body”

flow limiting stroke section for correct plug adjustment

2. Malfunctioning positioner 2. Refer to positioner maintenance instructions

3. Service conditions exceed trim 3. Verify service conditions and consult factory

design capacity

Plug slams 1. Incorrect plug adjustment 1. Refer to steps 8 - 10 of “Reassembling the Body”

allowing improper cushion of section for correct plug adjustment

air between actuator piston

and yoke

2. Inadequate air supply 2. Check air supply to actuator; repair leaks and

remove any restrictions in supply line

3. Trim sized too large for flow rate 3. Install reduced trim

Valve does 1. Incorrect flow direction 1. Reconfirm direction and, if necessary, correct flow

not fail in cor- direction through valve

rect position

Flowserve Corporation has established industry leadership in the design and manufacture of its products. When properly selected, this Flowserve product is designed to perform its

intended function safely during its useful life. However, the purchaser or user of Flowserve products should be aware that Flowserve products might be used in numerous applications

under a wide variety of industrial service conditions. Although Flowserve can (and often does) provide general guidelines, it cannot provide specific data and warnings for all possible

applications. The purchaser/user must therefore assume the ultimate responsibility for the proper sizing and selection, installation, operation and maintenance of Flowserve products.

The purchaser/user should read and understand the Installation Operation Maintenance (IOM) instructions included with the product, and train its employees and contractors in the safe

use of Flowserve products in connection with the specific application.

While the information and specifications presented in this literature are believed to be accurate, they are supplied for informative purposes only and should not be considered certified or

as a guarantee of satisfactory results by reliance thereon. Nothing contained herein is to be construed as a warranty or guarantee, express or implied, regarding any matter with respect

to this product. Because Flowserve is continually improving and upgrading its product design, the specifications, dimensions and information contained herein are subject to change

without notice. Should any question arise concerning these provisions, the purchaser/user should contact Flowserve Corporation at any of its worldwide operations or offices.

For more information about Flowserve, contact www.flowserve.com or call USA 972 443 6500

Regional Headquarters

1350 N. Mt. Springs Prkwy.

Springville, UT 84663

Phone 801 489 8611

Facsimile 801 489 3719

12 Tuas Avenue 20

Republic of Signapore 638824

Phone (65) 862 3332

Facsimile (65) 862 4940

Flowserve and Valtek are registered trademarks of Flowserve Corporation.

12, av. du Québec, B.P. 645