Armstrong GD-10 설치 및 유지 관리 지침

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페이지 인쇄

Typical Piping For Air

Liquid

Drainer

Typical Piping For Steam

This bulletin should be used by experienced personnel as a guide to the installation of the Model GD-10, GD-10N and

GD-10F Pressure Reducing Valve. Selection or installation of equipment should always be accompanied by competent

technical assistance. You are encouraged to contact Armstrong International, Inc. or its local representative for

additional information.

Improper adjustment of the pressure reducing valve may cause hunting, scale problems, etc., and damage to the valve

itself. Adjust the valve as follows:

1. Close the gate valves before and after the pressure

reducing valve. Open the globe valve in the bypass line

and blow down the inlet piping. Adjust the opening of

the bypass valve so that the safety valve if used does

not blow. After blowing the system down, close the

bypass valve.

Model GD-10, GD-10N and GD-10F

Pressure Reducing Valve

Installation and Maintenance Instructions

Armstrong GD-10, 10F, 10N

Pressure Reducing Valve

Strainer

Globe

Valve

Strainer

GD-6

Minimum of 10 inlet

Pipe Diameters from

PRV to First Turn

TVS Trap

Start-Up and Adjusting Procedures

By-Pass

Minimum of 10 outlet

Pipe Diameters from

Last Valve or Fitting

By-Pass

Minimum of 20 outlet

Pipe Diameters from

PRV to First Turn

Note: Safety Relief Valve to be set at

10 psi higher or 90% higher than

the downstream pressure, whichever

is greater.

2. Loosen the lock nut and adjusting screw to relieve the

adjusting spring.

3. Slowly open the inlet side gate valve to the fully open

position, and partially open the outlet valve so only a

small amount of fluid can pass.

Bulletin No. AY-741-A

Safety Relief

Valve