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10-1

Valtek Valdisk

Control Valves

Valtek No. 49020

GENERAL INFORMATION

The following instructions are designed to assist in unpacking,

installing and performing maintenance as required on Valdisk

rotary valves. Product users and maintenance personnel should

thoroughly review this bulletin prior to installing, operating, or

performing any maintenance on the valve.

Separate maintenance instructions cover additional features

(such as actuators, positioners, special accessories, fail-safe

systems, etc.) Refer to the appropriate Flowserve Installa-

tion, Operation, Maintenance Instructions when information

on installing, maintaining, troubleshooting, calibrating, and

operating Valtek

actuators or positioners is required.

To avoid possible injury to personnel or damage to valve

parts, WARNING and CAUTION notes must be strictly

adhered to. Modifying this product, substituting non-

factory parts, or using maintenance procedures other

than outlined could drastically affect performance, be

hazardous to personnel and equipment, and may void

existing warranties.

WARNING: Standard industry safety practices must be ad-

hered to when working on this, or any other, process control

product. Speciﬁcally, personal protective and lifting devices

must be used as warranted.

Note: Selecting the proper fastener material is the responsibility

of the customer. Typically, the supplier does not know what

the valve service conditions or environment may be. Valtek's

standard body bolting material is B7/2H. B8 (stainless steel) is

optional for applications above 800

F and with stainless steel

or alloy body valves. The customer therefore must consider

the material's resistance to stress corrosion cracking in addi-

tion to general corrosion. As with any mechanical equipment,

periodic inspection and maintenance is required. For more

information about fastener materials, contact your local Valtek

representative or factory.

Unpacking

1. While unpacking the valve, check the packing list against

the materials received. Lists describing the valve and

accessories are included in each shipping container.

2. When lifting the valve from the shipping container, posi-

tion lifting straps to avoid damage to tubing and mounted

accessories. Valves up through 14-inch may be lifted by

the actuator lifting ring. On larger valves, lift the valve

using lifting straps or hook through the yoke legs and

outer end of the body.

3. In the event of shipping damage, contact your shipper

immediately.

4. Should any problem arise, contact your Valtek representa-

tive.

Rev. 04/10

1 2 3 4 5 6 7 8

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Pagina 1 - Control Valves

10-1Valtek ValdiskControl ValvesValtek No. 49020GENERAL INFORMATIONThe following instructions are designed to assist in unpacking, installing and perf

Pagina 2 - Installation

10-2 WARNING: Keep hands, hair, clothing, etc. away from the rotating disc and the seat when operating the valve. Failure to do so could cause s

Pagina 3 - Removing Valve From Line

10-3PREVENTIVE MAINTENANCEAt least once every six months, check for proper operation by following the preventive maintenance steps outlined below.

Pagina 4 - Removing Actuator From Body

10-4Figure 2: Body AssemblyNOTE: Item numbers correspond directly to the valve's bill of material. Refer to it for speciﬁc part numbers.Body(Ite

Pagina 5 - Reassembling the Body

10-5insert the shaft through the body, bearings and disc. 5. Position the disc in the body, making sure it will rotate in the proper direction with

Pagina 6 - Contact factory

10-610. All seat conﬁgurations with screw/clip retainers require a gasket (item #55) installed in the appropriate groove. This is accomplished by pr

Pagina 7 - Remounting Actuator to Valve

10-78588938887801091175183508352122611215520/22123124vided on the end of the shaft and on the lever arm should be aligned. 2. Bolt the actuator yok

Pagina 8

10-8Failure Probable Cause Corrective ActionValve moves to failure 1. Failure of actuator O-ring 1. Replace actuator stem O-ringposition, excess

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