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When should this valve be replaced
Optimized Power Output: Provides 40VA of power
ensuring perfect alignment with original Sterling QV series heater brackets
ensuring a perfect mechanical and electrical fit
McDonnell & Miller 193 Controller Els PW 17895 When should this valve beThe McDonnell & Miller 193 (Part Number 163400) provides heavy duty combination low water cut off and pump control for commercial and industrial steam boilers. Engineered for high pressure systems with a 150 PSI maximum pressure rating, this unit features dual snap acting SPDT switches to ensure precise differential control and reliable burner shut down. The proportional action of the float mechanism maintains tight water level tolerances, preventing
