PRESSURETROL. RANGE .5 TO 9PSI (.1 TO .6 KG/CM2) WITHOUT LUG

- Maximum Safe Operating Pressure (psi) 20 PSI - Maximum Safe Operating Pressure (kPa) 137 kPa - Recommended minimum set point is differential setting plus 1 1/2 PSI. - Electrical Ratings0.25 A @ 0.25 to 12 Vdc; 120 Vac, Resistive: 8.3A; 240 Vac, Resistive: 8.3A; 277 Vac, Resistive 7.2A - Operating Humidity Range (% RH) 95% RH, non-condensing - Temperature Ratings 150 F - Maximum Ambient - Sensor Element Stainless Steel diaphragm - Operating Range (psi) 0.5 psi to 9.0 psi Adjustable - Operating Range (kPa) 3 kPa to 62 kPa Adjustable - Differential Pressure Range (psi) 1 to 5 psi Adj. - Differential Pressure Range (kPa) 7 to 35 kPa Adj. - Switching Action Makes at set point on pressure fall; Breaks at set point plus differential on pressure rise - Pressure Surge (max. psi) 50 PSI - Pressure Surge (max. kPa) 345 kPa - Adjustable Scale Range (psi) 0.5 psi to 9 psi - Adjustable Scale Range (kPa) 3 kPa to 62 kPa - Pilot Duty Ratings 150 VA @ 277 Vac - Switch Type SPST snap-acting switch - Pipe Connection 1/4 in. female pipe threads Features - The PA404A is a pressure actuated high limit, safety control for steam heating boilers. It breaks an electrical circuit to shut down the burner if steam pressure rises above a safe level. - Each model contains an SPST MICRO SWITCH snap-acting switch. - Sensitive pressure-actuated diaphragm expands or contracts with pressure variations, moving a lever mechanism which operates the snap switch. - A screw on top of the case allows set point adjustment without removing the cover. - Differential is adjusted by means of a dial located inside the case. The PA404 is a series 40 (2-wire, SPST) pressuretrol controller for use in 24, 120, 240 or 277 volt control circuits or in self powered (millivoltage) applications.