Key Technical Benefits Precise Calibration: Factory-set at -

preventing premature sensor failure and ensuring the standing pilot remains stable under varying gas pressures

eliminating the need for makeshift mounting solutions

and Day & Night

EWC Controls PRD 10" Pressure Regulating Damper Els PW 17895 Key Technical Benefits Precise Calibration:EWC Controls PRD 10" Pressure Regulating Damper Made in USA. Model PRD RD pressure regulating damper is a single blade, round variation of a barometric relief damper. This is the simplest, most economical way of bypassing excess static pressure in multi zone applications. Resistance is controlled by offsetting the arm and adjusting the weights. The arm can be inserted into either side of the damper for added versatility.