Bellows Valves, High-Purity

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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.

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)

More Information
Download the Bellows-Sealed Valves—BN Series catalog.
Download the BN Series Bellows Valve Technical Report.
Find high-purity bellows valves and high-purity bellows valves, multiport in the product search.

Other High-Purity Bellows Valves
High-pressure, pneumatically actuated bellows-sealed valves—HB series

Features

Manual Valve	Pneumatic Valve

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 ^–9std 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.

Bonnet Sniffer Tube	Indicator Switch	Polyimide Stem Tip

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TPED-compliant sample cylinders, valves, and rupture discs

Swagelok® TPED-Compliant Products
Swagelok offers sample cylinders, cylinder valves, and rupture disc units that are compliant with the Transportable Pressure Equipment Directive (TPED).

Swagelok® Tubing and Tube Supports
Tubing: Chemically-Cleaned and Passivated, Ultrahigh-Purity Stainless Steel, Medium-Pressure, Pre-Coned, Insulated, Jacketed, and Pre-Insulated Bundled.