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Home > Products > Valves > Bellows-Sealed > High Purity Bellows Valves
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High Purity Bellows Valves

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Bellows Valves—BN Series

Swagelok® BN series bellows-sealed valves offer packless operation, with an all-metal seal to atmosphere and cleaning for high- and ultrahigh-purity systems.

BN Series Group

Specifications


Working Pressure
Temperature
Flow Coefficient
Body Material
Stem Tip Material
End Connections
• Type


• Size
Internal Volume

 

 

Vacuum to 500 psig (34.4 bar)
–40 to 200°F (–40 to 93°C)
0.30 and 0.70
316L stainless steel
PCTFE

Swagelok tube fitting, butt weld, tube weld, tube extension, VCR® face seal fitting, VCO® O-ring fitting
1/4 to 1/2 in.; 6 to 12 mm
0.18 and 0.27 in. 3 (2.9 and 4.4 cm 3 )

Features

Manual Valve Pneumatic Valve
BN Rotary Cutaway BN Rotary Cutaway
  • Valve
    • Full pressure rating in either flow direction for system versatility
    • Union bonnet construction for safety
    • Stem guiding outside of system fluid for clean operation
    • Precision-formed metal bellows for reliability
    • Nonrotating stem tip for increased shutoff cycle life.
  • Manual actuators—rotary or toggle handle
  • Pneumatic actuators—normally closed and normally open actuation modes
  • Panel mounting and bottom mounting.


High-Purity Bellows Valve Process Specifications

  • Standard, no process designator: Special Cleaning and Packaging (SC-11)
    • Special cleaning with non–ozone-depleting chemicals
    • Performed in specially cleaned areas; valves are individually bagged
    • 20 µin. (0.51 µm) average, machine finished.
  • Ultrahigh-purity, process designator P: Ultrahigh-Purity Process Specification (SC-01)
    • Ultrahigh-purity cleaning with a continuously monitored, deionized water, ultrasonic cleaning system
    • Performed in ISO Class 4 work areas; valves are double bagged and vacuum sealed in cleanroom bags
    • 8 µin. (0.20 µm) average, machine finished and electropolished.


Testing

Inboard helium leak tested to a rate of 4 × 10 –9 std cm 3 /s at the seat, envelope, and all seals.


Options and Accessories BN Multiport Valve

  • Muiltiport and elbow bellows valves and multivalve manifolds available.
  • Bonnet sniffer tubes allow monitoring of bellows integrity.
  • Indicator switches transmit a signal indicating open or closed position.
    • Factory assembled
    • Indicator switch kits
  • Polyimide stem tips are available in BN4 series bellows valves for temperatures up to 400°F (204°C) or where PCTFE is not compatible with the system fluid.
  • Toggle handles—seven colors are available.
  • Optional pneumatic actuator NPT inlet port.
  • Hose adapter kits allow for use of soft plastic or rubber tubing at the inlet of the pneumatic actuator.
BN Series with Bonnet Sniffer Tube BN Series with Indicator Switch BN Series with Polymide Stem Tip
Bonnet Sniffer Tube Indicator Switch Polyimide Stem Tip
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