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P6BS Bellows Seal Valve
Brand: Phoenix PrecisionThe bellows seal valve is designed with a metal bellows between the stem and body as the primary seal, which provides a hermetical metal boundary to the process eliminating two leaking paths compared to traditional packed seal valves.
Zero fugitive emission is achieved by this configuration. A standard Grafoil™ backup packing and a backseating valve stem provide additional safety.
Various bellows seal valve types are available, including needle, block and bleed and double block and bleed.
The bellows valve is designed, built and tested in accordance with MSS-SP 130 Bellows Seals for Instrument Valves.
Features- Metal bellows seal is the primary seal
- Backseat and Grafoil packing
- Integral stem-ballows-cartridge welding assembly
- Unique locking device with non-rotating stem
- Monitoring port (1/8” FNPT) on bonnet (optional)
- Hydrotested at 150% of rated pressure (shell test). Nitrogen gas tested to 1,200 psi
- Seat tightness (zero leakage) verified to 110% of rated pressure. Nitrogen gas tested to 900 psi
- Integral double block and bleed valve body configuration
- 8 RMS stem finish
- Non-rotating stem design with ceramic ball tip
- Bellows design cycle, vacuum and helium tested
- Pressure component materials sourced from the US, Canada or Europe
Specifications
Brand
Rating
- For Valve: 800 psi @ 100 °F
- For 150# Flange: 275 psi @ 100 °F
- For 300# Flange: 720 psi @ 100 °F
Stem
- Non-rotating Ceramic Ball Tip Stems for All Blocks and Bleed
Bore Size
- 3/8"