Emerson A31A Instrukcja Obsługi Pobierz pdf (Strona 4)

Cryogenic-Rotary Valve

Instruction Manual

Form 5482

February 2005

Figure 2. Maximum Pressure/Temperature Ratings

CLASS 150, KEL‐F SEAL CLASS 300, KEL‐F SEAL

C0759-1 / IL

KEL-F

A4132-1 / IL A3715-2 / IL

Preparing for Installation

CAUTION

To avoid damage to the valve disc

during installation, the valve must be

in the fully-closed position. If the Type

A31A Cryogenic valve is equipped with

a fail-open actuator, remove the

actuator before installing the

valve/actuator assembly or cycle the

valve into the fully closed position.

Then, take appropriate steps to ensure

that the actuator does not cause the

valve to open during installation.

1. The Type A31A Cryogenic valve is normally

shipped as part of an assembly with an actuator and

other accessories. If the valve and actuator have

been purchased separately or if the actuator has

been removed for maintenance, properly mount the

actuator and adjust valve/actuator travel and all

travel stops before inserting the valve into the line.

Follow the instructions in this manual for Adjusting

Travel stops. Also, refer to a separate actuator

instruction manual for detailed actuator mounting

and adjustment procedures.

2. If not previously removed, remove the protective

end covers from the valve and inspect the valve

body to be certain that it is free of foreign material.

Also, be certain that adjacent pipelines are free of

any foreign material, such as pipe scale or welding

slag that could damage the valve seating surfaces.

1 2 3 4 5 6 7 8 9 ... 23 24

Brak uwag

Emerson A31A Instrukcja Obsługi Strona 4