Flowserve Valtek Mark One Three-way Control Valve Manuale Utente Scaricare il pdf (Pagina 1)

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

Valtek Three-way

Control Valves

Valtek No. 49013

GENERAL INFORMATION

The following instructions are designed to assist in

unpacking, disassembling, reassembling and trou-

bleshooting Valtek

three-way control valves. Product

users and maintenance personnel should thoroughly

review this bulletin in conjunction with Installation, Op-

eration, Maintenance Instructions 1 (Mark One and Two

Control Valves) prior to installing, operating or perform-

ing any maintenance on the valve.

This publication does not contain information on Valtek

positioners. Refer to the appropriate Installation, Op-

eration, Maintenance Instructions for installing, main-

taining, troubleshooting, calibrating, and operating

Valtek positioners.

To avoid possible injury to personnel or dam-

age to valve parts, WARNING and CAUTION

notes must be strictly adhered to. Modifying

this product, substituting nonfactory parts, or

using maintenance procedures other than out-

lined could drastically affect performance and

be hazardous to personnel and equipment, and

may void existing warranties.

Three-way valves are used for either converging or

diverging service. For interchangeability, a standard

globe valve converts to a three-way valve with the

addition of a three-way adaptor, upper seat ring, two

upper seat gaskets, and a three-way plug. Its operation

is similar to a standard Mark One globe valve.

Unpacking

1. While unpacking the valve, check packing list against

the materials received. Lists describing valve and

accessories are included in each shipping container.

2. When lifting the valve from the shipping container,

position the lifting straps to avoid damage to the

tubing and mounted accessories. Valves provided

with a lifting ring (up to 6-inch) may be lifted by the

actuator lifting ring. On larger valves, lift the valve

using straps through the yoke legs or if provided,

lifting brackets bolted to bonnet stud.

3. In the event of shipping damage, contact your ship-

per immediately.

4. If any problems arise, contact your Flowserve

representative.

Troubleshooting

If difficulty is suspected with the control valve, check the

following:

1. Make sure the valve has a sufficient air supply.

2. Check for air leaks in the air supply, instrument signal

system, and positioner.

3. Make sure the packing isn’t too tight by lossening the

gland flange nuts and retightening to just over finger-

tight.

CAUTION: Do not overtighten the packing. This

can cause excessive packing wear and high stem

friction which may impede plug movement.

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

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Sommario

Pagina 1 - Control Valves

3-1Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611Valtek Three-wayControl ValvesValtek No. 49013GENERAL INFORMATIONThe following

Pagina 2 - Reassembling Three-way Valves

3-2Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 86112. Install new seat ring gasket, lower seat ring andretainer.3. Insert the plu

Pagina 3 - Figure 1:

3-3Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611Figure 1:Mark One Three-way Valve Body SubassemblyNOTE: Item numbers correspo

Pagina 4