The solenoid valve is a common component for controlling the flow of fluid or vapor. The solenoid is the tightly coiled spring inside the valve that produces a magnetic force field when an electric current passes through it. The valve is the metal that encloses the solenoid.
A pressure valve solenoid is a snap-acting valve. It responds to pressure quickly. It is either 'on' or 'off' and will never be in a neutral position.
The pressure valve solenoid starts or stops the flow of fluid or gas. Domestic appliances such as the air-conditioner, refrigerator, washing machine, dishwasher and the gas heating systems all have pressure valve solenoids to control the flow of water or air.
A pressure valve solenoid can be a one-way, two-way or a four-way valve. A two-way valve has one inlet and one outlet. It is either normally closed (NC) or normally open (NO). A three-way valve has three ports connecting to two openings, inlet and outlet. This valve can have three ports open at the same time, one closed and two open or all closed. A four-way valve has four or five pipe connections with one inlet and two outlets. Big industrial units use three-way or four-way valves to control fluid and gas flow.
- Photo Credit fuel valve image by Luis Bras from Fotolia.com coil image by Alison Bowden from Fotolia.com natural gas meter image by Tijara Images from Fotolia.com
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