Industrial Solenoid Valve-Normally Open Features
A solenoid valve is an electromechanically operated valve. The valve is controlled by an electric current through a solenoid: in the case of a two-port valve the flow is switched on or off; Solenoid valves are the most frequently used control elements in fluidics. Their tasks are to shut off, release, dose, distribute or mix fluids. They are found in many application areas. Solenoids offer fast and safe switching, high reliability, long service life, good medium compatibility of the materials used, low control power and compact design.It is often the plunger-type actuator.
Action movement of normally open solenoid valve: when the coil is electrified, it will generate magnetic force to drive the valve core, the gas circuit is cut off. Once the electricity of the coil is cut off, the gas circuit is connected, this is also the "inching".
When the solenoid valve needs to open for a long time, the duration is longer than the closing period, and the continuous opening time is not so long, the normally open type should be selected. Or used in gas alarming system, the normally open gas emergency cut-off solenoid valve with manual opening shall be selected.
The normally open solenoid valve is widely used in homemade systems of dyeing, textile, printing and dyeing, food, medicine, cigarette, cement products, petrochemical engineering, metallurgical and other departments.
The specific installation location of solenoid valve should be determined according to the specific conditions of different gas pipelines. But the following principles should be followed:
1. The solenoid valve should be installed behind the cut-off valve.
2. The solenoid valve must be installed horizontally, and upper valve body should be upwards.
3. The solenoid valve should be installed in a position that is convenient for repair and maintenance. Ensure that it can be easily connected with the combustible gas alarm. Professionals should use special tools to install emergency shut-off valves.
4. After the installation of solenoid valve, the installation personnel should use special leakage detecting instrument or suds to check whether the connection between the solenoid valve and the gas pipeline is leaking, so as to ensure safe delivery and use.
Main technical parameters
1.Applicable gases: natural gas, liquefied petroleum gas, artificial gas and other non-corrosive gases .
2.Rated voltage: AC220V±10%V.
4.Output method:electric closing type
5.Cut off time: <1 second.
6.Operating temperature (environment): - 20 ℃ ~ 60 ℃.
7.Nominal diameter: DN15-DN500
8.Nominal pressure: 1.6 Mpa.
9.Maximum working pressure:≤0.6MPa
10.Explosion-proof mark: ExmbII T6
11.Outlet length: One meter
12.Sealing material: NBR
13.Valve body material: aluminum alloy and cast steel (DN250-DN500)
1.Encapsulation Explosion: Fundamentally eliminate sparks, more stable and reliable;
2.Open valve mode: manual reset, to avoid accidents;
3.Maintain the way: can open the valve and off the valve state stable operation that is bistable;
4.Valve closed method: Power-off automatic valve closing, external control signal automatic and manual valve closing
5.Off valve speed: within1 seconds to cut off the gas source;
6.Strong earthquake off valve: In case of strong vibration, the valve can be closed;
7.Independent decompression: when the pressure difference between the front and rear valves is too large, turn on the atmospheric valve before opening the valve, so that the gas will not be discharged into the atmosphere and the hidden danger is eliminated.
8.Zero pressure difference valve closing: the valve closing action can be realized when the front and rear pressure difference is 0, so as to avoid the non action of valve during micro leakage
9.Sealed form: Multi-stage sealing;
10.External iron core: iron core placed in the gas environment, can effectively prevent the adsorption of impurities to seal failure;
11.Sealing features: the more pressure the more tight seal, the valve can be guaranteed in more stable working conditions;
12.Reliable action: can maintain more than 10 years of effective action.