Vacuum Valves Manufacturers

Vacuum valve refers to the valve whose working pressure is lower than the standard atmospheric pressure, adjust the air flow, cut off or connect the pipeline

Vacuum Valves：Vacuum ball valve，Vacuum stop valve, vacuum diaphragm valve, vacuum solenoid valve, vacuum safety valve, vacuum baffle valve, vacuum plug valve, vacuum charging valve, etc.

Looper flange connection

This is the most commonly used connection form in valves. According to the shape of the joint surface, it can be divided into the following types:

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

2) Concave convex type: the working pressure is high, and medium hard washer can be used.

3) Tenon and groove type: gasket with large plastic deformation can be used. It is widely used in corrosive media and has good sealing effect.

4) Trapezoidal groove type: oval metal ring is used as gasket, which is used for valves with working pressure ≥ 64kg / cm2 or high-temperature valves.

5) Lens type: the gasket is lens shaped and made of metal. Used for high-pressure valves with working pressure ≥ 100kg / cm2, or high-temperature valves.

6) O-ring type: This is a relatively new type of flange connection. It is developed with the appearance of various rubber O-rings. It is more reliable than ordinary flat washers in sealing effect.

Threaded connection

This is a simple connection method, often used for small valves. There are two situations:

1) Direct sealing: internal and external threads directly play a sealing role. In order to ensure no leakage at the joint, it is often filled with lead oil, linen and polytetrafluoroethylene raw material tape; Among them, PTFE raw material belt is widely used; This material has good corrosion resistance, excellent sealing effect, convenient use and storage, and can be completely removed during disassembly, because it is a non sticky film, much better than lead oil and linen.

2) Indirect sealing: the force of thread tightening is transmitted to the gasket between the two planes, so that the gasket plays a sealing role.

Quick release flange connection

Clamp the sealing O-ring with the valve body flange to achieve better sealing.