The differential pressure regulator eliminates excessive pump head pressure, when most radiator valves are closed due to reduced demand, by controlling flow through a bypass line when the difference between supply/return exceeds the set point.
Install between supply and return sides of a hydronic system to stabilize pressure differential and reduce the effects of demand changes|Control maintains a constant differential between the two sides by opening a bypass whenever the difference between supply and return reaches the set point|Provides silent trouble free service|Easy installation requires no electrical hookup|Easy adjustment of pressure by turning regulating cap|Built-in differential pressure indicator|Brass valve body with thermoplastic and stainless steel parts|Diaphragm of EPDM
Honeywell Differential Pressure Regulator, 3/4 in Nominal, FNPT End Style, 85 psi Pressure, 230 deg F, 18 gpm Flow Rate, Brass Body, 3-3/8 in W x 6-1/4 in H Dimensions