Heavy-duty solenoid valves feature true union end connections and are designed so No Pressure Differential is required for reliable operation. Problems such as sticking and "chattering" are eliminated and downstream restrictions caused by nozzles, flowmeters, and other equipment will not affect performance. The valve’s unique coil design results in lower coil operating temperatures and a 100% continuous duty rating. A molded polyester housing protects the coil assembly and electronics from harsh corrosive environments, and an easy to replace one-piece seal cartridge and plunger assembly allow the valve to quickly be put back in service.