Looking at domestic and solenoid valve, so far:
Way from the action can be divided into three categories namely: direct-acting, kick, pilot;
From the valve on the different structures and materials as well as the difference between kick on the principle can be divided into: recoil diaphragm solenoid valve, solenoid valve piston recoil;
Pilot can be divided into: pilot diaphragm solenoid valve, pilot operated piston solenoid valve;
Seat and seal materials from sub-divided into: soft sealing solenoid valve, solenoid valve seal steel, semi-rigid closed solenoid valve.
A direct-acting solenoid valve
Principle: direct-acting normally closed solenoid valve, solenoid valve coils to produce electromagnetic suction lift, so stay away to open the valve seat seal off parts deputy opened; power, the electromagnetic force disappears, the spring force to close the device by pressing Close the valve on the seat. (Normally open to the contrary)
Features: In a vacuum, negative pressure, zero pressure when the normal work, DN50 any of the following can be installed, but the magnetic head and larger. Such as the introduction of our company¡¯s technology to produce HERION direct-acting solenoid valve can be 1.33 ¡Á 10-4 MPa vacuum.
Second, the recoil-type solenoid valve
Principle: Its principle is a direct-acting and pilot combination, solenoid valves to open the first auxiliary valve, main valve chamber under pressure greater than the pressure on the chamber pressure and solenoid valve using the valve open while the role of the ; power, the auxiliary valve with a spring force or push off pieces of media pressure, the valve will be shut down.
Features: zero pressure or hypertension can also be reliable, but power and larger, requiring vertical installation.
Third, the pilot solenoid valve
Principle: power, the electromagnetic force driving the pilot valve to open the pilot valve, main valve on the chamber pressure to drop rapidly in the main valve cavity to form the upper and lower pressure, the pressure to rely on media to promote the main valve off pieces on the move, the valve opens; power outage , spring force to close the pilot valve, inlet medium pressure quickly through the pilot hole into the main valve pressure chamber formed in the cavity, so that the main valve closed.
Features: small size, low power, but the medium pressure range is limited, must meet the pressure conditions.
3/2-way solenoid valve normally associated with single-acting pneumatic actuator supporting the use of two two position control: On - Off, Three is a three-channel ventilation, in general, a channel connected with the gas source, the other two channel 1 with the actuator inlet connection, a connection with the actuator exhaust port, the specific works can refer to a single-acting pneumatic actuator of the operating principle.
5/2-way solenoid valve is usually associated with double-acting pneumatic actuator supporting the use of two two position control: On - Off, Five-a five-channel ventilation, including one connected with the gas source, two with double role of the external air cylinder air inlet connection and out of rooms, two with internal air chamber and out the mouth after another, with reference to specific works can be double-acting pneumatic actuator works
In the gas (or liquid Road) on the run, two-way solenoid valve with an air intake (air intake connected source), a vent (air source supplied to the target device), a vent (usually installed a muffler, if you are not afraid of noise, then you can not install_@)¡£ 5/2-way solenoid valve with an air intake (air intake connected source), a positive action and a reaction out of holes to make holes (respectively to the target device a positive and negative action of the gas source), a positive action and an anti-vent action vents (installed muffler).
Automatic control equipment for small, 8 ~ 12mm tube is generally used in industrial plastic pipe. In electrical terms, two-way solenoid valve is usually a single electronic control (ie, single coil), 5/2-way double solenoid valve is usually controlled (ie, double coil). Coil voltage level commonly used DC24V, AC220V, etc. Divided into two three-way solenoid valve normally closed and normally open type two, normally closed type refers to the coil not energized when the gas is off, normally open type refers to the coil not energized when the gas is through. Normally closed 3/2-way solenoid valve action principle: to coil power, gas connected, once the coil power, gas will be disconnected, which is equivalent to "jog." Normally open 3/2-way single solenoid valve action principle: to coil power, gas off, when the coil power, gas will be connected, which is the "jog." 5/2-way double solenoid valve operation principle: action to the coil is energized, the gas line is connected to the action (positive action with air vent), even to positive action coil power is still connected to gas line action , and will be maintained until the coil is energized up to the counter-action. To the anti-action coil power, the gas line anti-actions on (there are reactionary to vent gas), even to the anti-anti-action action coil power, gas is still connected, will be maintained until the coil is energized to positive action to date . This is equivalent to "self-locking." Based on 5/2-way double solenoid valve of this feature in the design of mechanical and electrical control circuit when the PLC program or the preparation, allowing the solenoid valve coil moves 1 to 2 seconds on it, so you can protect the solenoid coil is not easily damaged .
Solenoid valve in fluid path system used to achieve liquid off the road or change direction of flow, it generally has an electromagnetic force in coil driven by sliding the spool, spool in a different position, solenoid valve access is different. There are several spool work location, called a few of the solenoid valve solenoid valve: the valve¡¯s interface is the channel number of solenoid valves, a few through the junction, called a few of the solenoid valve solenoid valve. Solenoid valve installed, generally all interfaces should be connected properly, the so-called working position refers to the spool position. Spool when the coil is not in a position of power in the coil is energized in the B position, the spool is in a different location on each interface, or play a role on or closed.
Two-way solenoid valve, three-valve solenoid valve means there are two, three openings; such as two two-way solenoid valve is into a (two channels, the most common common) two-way solenoid valve Control liquid is one into two (two are a normally open a normally closed); pneumatic reversing valve is entering and exiting an exhaust; entering and exiting a hydraulic oil return.
Home and abroad, from the principle of the solenoid valve is divided into three categories (ie: direct-action, step by step direct-acting, pilot operated), and from the valve on the different structures and materials with the principle difference is divided into six branch subclasses (direct-acting diaphragm structure, step by step re-sheet structure, membrane structure, leading, direct-acting piston structure, step by step direct-acting piston structure, the pilot piston structure).
