A-31VR
Small Vacuum Regulating Valve

Applications:
Suitable for surgical equipment, lab or manufacturing processes, and other applications requiring accurate and sensitive vacuum regulation at low flows.

Size: 1/4" only

Features:
Furnished in forged brass, with neoprene seat and diaphragm. Two adjustable ranges of 2" to 16" and 10" to 30" mercury vacuum. All connections are 1/4" IPS. Standard valve is plain brass. Closely controls low capacity vacuum systems. The vacuum source is connected to the bottom of the valve, one side connection is for a gauge, the other side connects to the system in which vacuum is to be controlled. The sensitive top screw automatically adjusts the vacuum source to maintain the desired vacuum in the system.

Cut Sheet on A-31VR provided for your reference.

FRM-V
Vacuum Breaker Valve

Applications:
A small sized vacuum breaker for controlling vacuum in a system by admitting atmosphere when the vacuum level exceeds the valve setting.

Sizes: 1/8", 1/4", 3/8"

Features:
Features full adjustability through a top adjusting screw. The adjusting screw is turned clockwise for a higher setting and counterclockwise for a lower setting. Forged brass body, stainless steel valve seat and valve disc, stainless steel or rust-proofed steel pressure spring, and neoprene or bronze diaphragms. Adjustable spring range 2" to 30" mercury vacuum.

Cut Sheet provided for your reference.

D-51, D-52 Vacuum Regulating or Breaker Valves

Applications:
Designed for use where a predetermined vacuum is to be accurately maintained in a closed system (D-51 Vacuum Regulator) or by automatically admitting atmosphere when the vacuum level exceeds the valve setting (D-52 Vacuum Breaker).

Sizes: 1/2", 3/4", 1", 11/4", 11/2", 2"

Features:
Fully adjustable and furnished with bronze bodies, threaded connections and internal parts, neoprene-nylon diaphragms, stainless steel body seats and composition discs. Two ranges - 2" to 30" mercury.

Cut Sheet provided for your reference.