DeZurik PEC 5450 Handbuch - Seite 9

Blättern Sie online oder laden Sie pdf Handbuch für Kontrolleinheit DeZurik PEC 5450 herunter. DeZurik PEC 5450 18 Seiten. Eccentric valves

Closed Position

Because of the eccentric action of this valve, the closed position of the valve is dependent upon the

pressure drop expected when the valve is closed.

To adjust the valve closed position, follow these steps:

1. Relieve pipeline pressure.

Moving parts from accidental operation of power actuator can cause personal injury or

equipment damage. Disconnect and lock out power to actuator before servicing.

2. If the actuator is powered, disconnect and lock out the pneumatic, hydraulic, or electrical power

to prevent accidental operation of the actuator.

3. Back off the actuator closed position stop as described in the Actuator Instructions.

4. Close the valve with the torque specified in the Actuator Instructions.

Note: This torque is the amount required to seat the plug for a given pressure drop across the valve. To

avoid excessive plug and seat wear caused by over torquing, use the actual pressure drop across the

valve when determining correct closing torque.

5. After the valve has been closed using the correct amount of torque, set the actuator closed

position stop to limit actuator travel at this position.

This valve does not require routine lubrication.

If disassembled, lubricate the plug journals with a lubricant that is compatible with the flow media. For

most applications, use one of these nickel based compound lubricants.

- Bostik Never-Seez (recommended)

- Keystyone No-Weld #1 (alternate)

The orientation of the plug can be determined by the 1/2 inch wide cast lug on the plug stem. This lug is

directly above the centerline of the plug face.

To stop packing leakage, tighten the gland nuts uniformly until the leak stops.

Note:

Do not continue tightening after leak stops. If the leak cannot be

stopped by tightening the gland nuts, replace the packing.

April 2015

3650-7200 PEC Eccentric Valves

Page 9

DeZURIK

D10019