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.
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", 1-1/4", 1-1/2", 2"