Spectral chamber vent valveIt is a key component used to control gas flow in vacuum systems, and its function and operation need to be combined with high vacuum environmental requirements.
Core functions:
Pressure regulation:
By releasing excess gas or adjusting the flow rate, maintain the stability of the vacuum degree in the spectral chamber (usually requiring ≤ 1 × 10 ⁻⁸ Pa).
Security protection:
Prevent sealing failure or equipment damage caused by excessive pressure in the system.
How to operate the spectral chamber vent valve correctly:
Sealing performance testing:
Sealing performance is the key to safe operation. Before each use, check the air circuit connection to ensure there are no leaks. The detection methods usually include:
Soap water leak detection method: Use a cotton swab dipped in soap water to apply to each connection of the air circuit, and observe whether bubbles are generated. If air leakage is found, the components need to be replaced immediately.
Professional instrument testing: For high-purity gas systems, helium mass spectrometer leak detectors and other equipment can be used to ensure that the leakage rate meets the requirements.
Material selection:
The material directly affects the sealing and safety:
Avoid using copper/silver materials: It is strictly prohibited to use copper, brass, or silver spare parts in the acetylene gas circuit to prevent explosions.
Recommended material: High purity gas systems should use materials such as 316L stainless steel and undergo vacuum annealing treatment to reduce gas release rate. Valves should prioritize using unfilled bellows valves or ball valves to reduce the risk of gas pollution.