Product Details
- Product Name:All-Welded Check Valves
- Materialof the Valve body: 316L，316L VAR
- Inlet Size:1/4”,1/2”
- Variousend connection Types:Rotatable Female VCR Metal Gasket Face Seal Fitting,Integral Male VCR Metal Gasket Face Seal Fitting,Rotatable Male VCR Metal Gasket Face Seal Fitting,Fractional Tube Butt Weld,Metric Tube Butt Weld
Features
- Internally threadless and all-welded design
- Forward flow starts at less than 2 psig (0.14 bar) pressure differential
- Valve closes with less than 2 psig (0.14 bar) back pressure
- Standard surface roughness finished to an average of Ra 20 μin. (0.5 μm)
- or electropolished to Ra 10 μin. (0.25 μm) optional
- Variety of end connections available
Application:
Ultra-High Purity and High-Cleanliness Systems
Semiconductor Manufacturing: Gas lines for wafer processing, etching, and CVD/PVD processes
Biopharmaceuticals: Media, buffer solutions, and Water for Injection (WFI) systems
Analytical Instruments: Ultra-high purity carrier gas and reagent flow paths for chromatographs and mass spectrometers
Demanding Media and Sensitive Processes
Corrosive/Reactive Gases: Transport of specialty gases such as chlorine, fluorine, silane, and ammonia
Toxic or Hazardous Chemicals: Prevention of backflow-induced contamination or safety incidents
Systems Requiring Extremely Low Leak Rates: Helium leak-tight standards to ensure sealing reliability
Low-Pressure Differential and Precision Flow Control
Low-Pressure Gas Distribution: Laboratory gas lines and calibration gas systems
Precision Analytical Equipment: Instrument inlets requiring stable, low-disturbance flow
Pressure-Fluctuation-Sensitive Systems: Extremely low cracking pressure (<2 psig) and reseal pressure ensure process stability
High Reliability and Long Service Life Requirements
All-Welded, Threadless Design: Completely eliminates potential leakage points and particle generation from threads
Electropolished Option (Ra 0.25 µm): Maximizes reduction of surface adsorption and retention, facilitating purging
VAR (Vacuum Arc Remelt) Material Option: Suitable for applications requiring the highest material purity (e.g., semiconductor front-end processes)
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