Armstrong-Yoshitake, Inc. GD-30 설치 및 유지 관리 지침

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Installation for Steam Service

Installation for Air Service

This bulletin should be used by experienced personnel as a guide to the installation of the Model GD-30 and GD-30S

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.

1. An Armstrong Inverted Bucket Steam Trap is

recommended to drain condensate at the inlet of the

Pressure Reducing Valve (PRV). A Liquid Drainer is

recommended for air service.

2. An Armstrong Y-Strainer (20-100 mesh, depending on

system dirt) should be installed before the PRV to

reduce the chance of dirt fouling.

3. Pressure gauges should be installed before and after

the PRV.

Model GD-30, GD-30S

Pressure Reducing Valve

Installation and Maintenance Instructions

Installation Instructions

4. If system cannot be turned off to service PRV then

piping a by-pass line with a high quality globe valve

around the PRV will allow manual system operation

while the PRV is being serviced.

5. Do not install quick opening or closing valves down-

stream of the PRV.

6. Install the PRV with the flow in the direction of the

arrow on the body.

Bulletin No. AY-764-B