Classification and Connection Forms of Vacuum Pressure Valve

July 26, 2022

Vacuum Pressure Valve is a valve with an operating pressure below the standard atmospheric pressure.

Connection form: sleeve flange connection and threaded connection.

Classification: vacuum ball valve, vacuum butterfly valve, vacuum gate valve.

Product classification: vacuum stop valve, vacuum diaphragm valve, vacuum solenoid valve, vacuum CPVC Safety Valve, vacuum gear plate valve, vacuum plug panel valve,Breather Valve, vacuum valve, vacuum filling valve, etc.

Common connection forms:

1. Flexible sleeve flange connection:

This is the most used form of connection in the Pressure Vent Valve. According to the shape of the binding surface, it can be divided into the following types:

1) Smooth type: used for valves with low pressure. The processing is more convenient.

2) Conump: high working pressure, can use medium hard washer.

3) Tenon and groove type: usable plastic deformation of the large Rubber Gasket, widely used in corrosive media, the sealing effect is good.

4) trapezoadder groove type: use oval metal ring as a gasket, used in the working pressure of 64 kg / cm 2 valve, or high temperature valve.

5) Lens type: the Viton Gasket is a lens shape, made of metal. For high pressure valve with working pressure of 100 kg / cm 2, or high temperature valve.

6) O-ring type: this is a new kind of flange connection form, it is developed with the emergence of various rubber O-rings, and developed, it is more reliable in the sealing effect than the general flat Sealing Gasket.

2. Thread connection:

It is a simple connection method, commonly used in small valves. There are two more cases:

1) Direct seal: internal and external threads play direct sealing. In order to ensure no leakage at the connection, lead oil, wire hemp and PTFE are often filled; the PTFE raw belt is widely used; this material has good corrosion resistance, excellent sealing effect, easy use and preservation, can be completely removed, because it is a non-adhesive film, much better than lead oil and wire hemp.

2) Indirect seal: the force of screw thread rotation is transmitted to the Valve Gasket between the two planes to seal the washer.

3) Quick unloading flange connection: use the clamp to seal the sealing O-ring and the valve body flange, to achieve a better seal.

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Mr. Zheng

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