Specifications Working Pressure Temperature Flow Coefficient Body Materials Stem Tip Materials End Connections •  Type •  Size Internal Volume

Up to 1000 psig (68.9 bar) –20 to 900°F (–28 to 482°C) 0.12 to 1.2 316 stainless steel, brass, alloy 400 316 stainless steel, PCTFE, cobalt-based alloy Swagelok tube fittings, tube butt weld, tube socket weld, butt weld, VCR® face seal fitting 1/4 to 3/4 in.; 6 to 12 mm 0.10 to 0.26 in.3 (1.6 to 4.3 cm3)

• Gasketed or welded body-to-bellows seals
• Stem tips for shutoff or regulating service

Regulating	Conical	Nonrotating spherical

• Bar, round, or toggle handle; pneumatic actuation also available.
• Precision-formed metal bellows provides reliable seal to atmosphere.

Testing
Every B series bellows valve is factory tested with helium for 5 s to a maximum leak rate of 4 × 10^–9 std cm³/s at the seat, envelope, and all seals.

Cleaning and Packaging

• Swagelok B series bellows valves with VCR end connections and all BK series valves are processed in accordance with Swagelok Special Cleaning and Packaging (SC-11) to ensure compliance with product cleanliness requirements stated in ASTM G93 Level C. Swagelok
• Swagelok B series bellows valves with other end connections are processed in accordance with Swagelok Standard Cleaning and Packaging (SC-10); special cleaning and packaging are available as an option.

Valve Options and Accessories

• Vacuum stem tip/adapters help eliminate gas pockets or trapped volumes.
• Polyimide stem tips provide soft-seat shutoff for temperatures up to 400°F (204°C) or where PCTFE is not compatible with the system fluid.
• Copper stem tips provide metal soft-seat shutoff for temperatures up to 400°F (204°C) or where PCTFE is not compatible with the system fluid.
• Colored toggle handles

Pneumatic Actuators 

• Normally closed, normally open, and double acting actuation modes
• Reliable piston design for enhanced cycle life 
• Low actuation pressures 
• Aluminum and stainless steel components
• 1 series actuator for BK series valves with brass, stainless steel, and alloy 400 bodies 
• 5 series actuator for BG, BK, and BW series valves with stainless steel and alloy 400 bodies—not for valves with brass bodies

Pneumatic Actuator Options and Accessories

BK series valve with 1 series actuator and indicator switch	B series  valve with 5 series actuator and microswitch

•   Indicator Switches
• Transmit a signal to an electrical device indicating either the open or closed position of a pneumatically actuated valve
• Factory assembled
• Indicator switch kits for field assembly.
• Microswitches
• Signal OPEN or CLOSED position of valve to panel or process controller
• Factory assembled
• Microswitch kits for field assembly

 
Maintenance Kits
Stem tip/adapter kits, bellows kits, and gasket kits are available for BG, BRG, BK, and BKT series valves. Download the Swagelok Bellows-Sealed Valve Maintenance Kits catalog.