Assembly in Action: Polymers Improve Valve's Reliability
The redesigned valve is used in humidifiers, pneumatic automation systems, beverage dispensers and other equipment. The valve's main components are a solenoid assembly, valve body and plunger. When the solenoid coil is energized, a spring load elastomer-tipped plunger is drawn away from an integral seat in the valve body, allowing fluid to flow through the unit.
The new valve solenoid assembly is encapsulated with Rynite PET thermoplastic polyester resin from DuPont (Wilmington, DE). Its coil bobbin is injection molded from Rynite PET or, for food or beverage equipment, Delrin acetal resin. The valve body is injection molded from Delrin.