The Difference Between Electric Valve and Stainless Steel Solenoid Valve

Difference between electric valve and solenoid valve: Plastic solenoid Valve is the solenoid coil power after the generation of magnetic force to attract over the pressure to overcome the spring to drive the valve core action, a solenoid coil, simple structure, cheap price, can only realize the switch; Electric valve is through the motor to drive the valve stem, drive the valve core action, the electric valve is divided into (turn off the valve) and the regulating valve. Close the valve is a two-bit operation, that is, fully open and full close, the regulating valve is installed on the electric valve positioning device, through the closed-loop adjustment to make the valve dynamic stability in a position.

1. Switch form: The Plastic solenoid Valve is driven by the coil and can only be opened or off. The operation time is short. The drive of electric valve is generally a motor, open or close action to complete a certain time to simulate, can be adjusted.

2. Nature of the work: Brass Solenoid Valve generally circulation coefficient is very small, and the working pressure difference is very small. For example, the general 25 caliber Stainless Steel Solenoid Valve circulation coefficient is much smaller than the 15 caliber electric ball valve. The Plastic solenoid Valve is driven through the solenoid coil, which is relatively easy to be damaged by the voltage impact. Equivalent to the role of the switch, is to open and off 2 roles. Electric valve drive is generally a motor, more resistant to voltage impact. Stainless Steel Solenoid Valve is fast open and fast close, generally used in small flow and small pressure, requiring the switch frequency of a large place of electric valve vice versa. The opening degree of the electric valve valve can be controlled, the state is open, closed, half open and half close, can control the flow of the medium in the pipe and the solenoid valve can not meet this requirement. Stainless Steel Solenoid Valve general power can be reset, electric valve to this function needs to add a reset device.

3. Applicable process: Solenoid valve is suitable for some special process requirements, such as leakage, special fluid media, the price is more expensive. Electric valve is generally used for adjustment, there are also switching volume, such as: fan coil end. Selection skills: the solenoid valve selection methods can have many, but are based on the working conditions and environment of the Stainless Steel Solenoid Valve and customer requirements. Solenoid valve classification mode is more, such as according to the working principle, according to the media attributes, according to the environmental working conditions, and according to the PTFE solenoid valve material classification. Different types of solenoid valve type selection skills:

一：Corrosion resistance solenoid valve according to the fluid parameters of the PVC solenoid valve selection: material, temperature group

1. Corrosive fluid: should choose corrosion-resistant solenoid valve and all stainless steel; eat ultra-clean fluid: should choose food-grade stainless steel solenoid valve.

2. High temperature fluid: to choose the high temperature-resistant electrical materials and sealing materials made of the electromagnetic valve, and to choose the piston structure type.

3. Fluid state: large to gaseous, liquid or mixed state, especially when the diameter is greater than DN25 order must be distinguished.

 4. Fluid viscosity: usually below 50cSt, if this value is exceeded, a high viscosity solenoid valve should be selected.

二：Gas solenoid valve select solenoid valve according to pipeline parameters: diameter specification (i. e. DN), interface mode.

1. Determine the diameter (DN) size according to the field pipe internal diameter size or flow requirements.

2. Interface mode, generally> DN50 should choose the flange interface, and DN50 can be selected freely, according to the user needs.

三：Water solenoid valve according to the pressure parameter selection of solenoid valve: principle and structure varieties.

1. Nominal pressure: This parameter has the same meaning as other general valves, and is determined according to the pipe nominal pressure.

2. Working pressure: if the working pressure is low, the principle of direct or step by step must be adopted; and the minimum is 0.04Mpa when the minimum working pressure difference is above 0.04 M p a.

四：Normally closed solenoid valve, normally open solenoid valve, or sustainable power supply solenoid valve .

1. If the opening time is short or the open and close time is not much, choose the constant closed type.

2. However, some working conditions used for safety protection, such as furnace and kiln flame monitoring, can not be often opened, and the long-term power supply type should be selected.

五：High temperature solenoid valve electrical selection: voltage specifications should be as far as possible to choose the inlet solenoid valve is more convenient.

六：Stainless steel solenoid valve selects auxiliary functions according to the environmental requirements: explosion-proof, check back, manual, waterproof fog, water shower, diving.

1、Explosive environment: the solenoid valve of the corresponding explosion-proof grade must be selected.

2. When the fluid in the pipe has a backflow phenomenon, the solenoid valve with check function can be selected.

3. When the field manual operation of the solenoid valve is required, the manual function solenoid valve can be selected.

4. Water-proof and dust proof should be selected for outdoor installation or dust (the protection level is above IP54).

5. Diving solenoid valve must be used for the fountain (the protection level is above IP68).

6. When the solenoid valve needs to be open for a long time, and the excess closure time lasts, the normal open type should be selected.