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Valve Type And Principle

Ningbo Fenfa Valve Co.,Ltd | Updated: Sep 07, 2017

Valve is used to control the water supply channel control facilities, due to the use of the distinction between the gate a lot of classification, the following for everyone to sort out and classify all the types of gate, we take a look.

1. Stop valve, its working principle is to rely on the valve stem pressure, so that the valve sealing surface and the valve seat sealing surface close to meet the closure effect.

2. Gate valve, its working principle is through the gate seal surface and the valve seat sealing surface with each other to achieve the effect of preventing the flow of media.

3. Ball valve, it works is to rely on rotating ball valve to make the valve open or closed.

4. Pressure reducing valve, mainly piston and spring film type two. Piston-type pressure relief valve works by the role of the piston to reduce the pressure to achieve the valve open or closed; spring thin film valve works is to rely on the spring and the film to carry out the pressure balance to achieve the valve opening or closing.

5. Check valve, its working principle is to rely on the impetus of the fluid itself to automatically open or close the valve.

6. Butterfly valve, its working principle is through the disc-shaped disc, around the seat of a shaft rotation, through the size of the angle to achieve the valve opening and closing.

7. Plug the valve, its working principle is to rely on the plug body around the centerline of the valve body rotation, in order to achieve the purpose of opening and closing the valve.

8. Thermodynamic trap, the working principle is when the equipment or pipe condensate into the gas barrier valve, the pressure chamber with the condensation of steam and reduce the pressure, the valve under the force is greater than the above force, So the valve will be raised, so that the valve remains open; when the equipment or pipeline steam into the trap, the steam than the condensate water viscosity is small, high flow rate, so the valve and the valve seat is likely to cause negative Pressure, while part of the steam into the transformer room, so that the valve quickly closed.

9. Bell-shaped float traps, the working principle is the trap in the trap is inverted, the beginning of the fall position, the control valve is open; when the equipment or pipeline in the cold air and condensate in the steam pressure driven into the hydrophobic Valve, then discharged by the control valve, when the steam and no discharge of a small amount of air gradually filled with the internal volume of the bucket, while the condensate continued to accumulate, bucket buoyancy due to the rise, so that the valve closed.

10. Float type trap, its working principle is when the equipment or pipe condensate in the steam pressure driven into the trap, gradually increased to close to filling the float, because the weight of the buoy more than the buoyancy and sink down , So that throttle valve open, otherwise closed.



Ningbo Fenfa Valve Co.,Ltd