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Profile: Connexion Developments Ltd offers brass solenoid valves, stainless solenoid valves and plastic solenoid valves. We are an ISO 9002 certified company. We specialize in all aspects of gas & liquid control, food process, LPG, gas, water control, acid, air applications, pneumatic process, petrol & diesel control valves in stainless steel, brass, plastic, nylon, & other materials and in all sizes from 1/8" BSP solenoid valves to 12" flanged solenoid valves. Our solenoid valves are used extensively in the food processing industry. Our pilot operated solenoid valves use the media pressure to open and close the valve by the using a small electric magnetic field to pull a small piston up against a spring, thus revealing a pilot hole in the diaphragm which causes it to lift under pressure from the media & allow for a passage through the solenoid valve. An assisted lift type of solenoid valve has a spring attached to this small piston which lifts the diaphragm off its seat, thus causing the valve to open even if there is no pressure from the media, or in the presence of a vacuum.