solenoid valves category
① direct-acting solenoid Valve
Principle: the power, the electromagnetic coil to produce the electromagnetic
force the closure of parts brought from the seat, the valve opens; power, the
electromagnetic force disappears, spring off pieces of pressure on the seat, the
valve closes.
Features: in the vacuum actuator, negative pressure, zero pressure
can work, but the path is generally not more than 25mm.
② distribution of direct-acting solenoid Valve
Principle: it is a direct-acting and pilot – a combination of principle, when no differential pressure of the inlet and outlet, the power, the electromagnetic force directly to the pilot valve and main valve closure of parts in turn lift the valve opens. When the inlet and outlet reaches the start pressure, electricity, electromagnetic force pilot valve, main valve cavity pressure rise on chamber pressure drop, which use differential pressure to the main valve is pushed upwards; power failure, the pilot valve with a spring force or medium pressure to promote off, move down, so that the valve is closed.
Features: zero pressure or vacuum actuator, high pressure, also can be action, but the power is larger, the requirements must be mounted horizontally.
③ Pilot solenoid Valve
Principle: power, electromagnetic force pilot hole open on the chamber pressure fell rapidly, close the pieces around the formation of low and high differential pressure, fluid pressure to promote off pieces to move up, the valve opens; power failure, the spring force pilot hole to close the inlet pressure of rapid chamber through the bypass hole off valve formed around a high pressure differential, the fluid pressure to promote the closure of parts moving down, close the valve.
Features: higher maximum fluid pressure range can be freely installed (to be customized) but must meet the fluid pressure conditions.
Should be considered in the use of some of its features, such as media characteristics, ambient temperature, operating frequency, power and other factors.
The basic characteristics of the solenoid valve
Security: do not pay attention to safety will lead to disaster!
Corrosive media: the king should use plastic solenoid valve and all stainless steel; isolation diaphragm for highly corrosive media must be selected. Cases the CD-F. Z3CF. Neutral media should use the copper alloy for the valve solenoid valve of the shell material, otherwise, the valve housing desquamation often rust, especially the action does not frequent occasions. Ammonia can not be used with the valve copper.
Explosive environment: You must choose the appropriate proof grade products, the open-air installation or dust occasions should use waterproof, dust-proof varieties.
More products of valves
