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
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.
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
Plumbing Heating & Industrial
Valves and Controls
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