Bleed Valves and Purge Valves
Swagelok® bleed valves can be used on instrumentation devices such as multivalve manifolds or gauge valves to vent signal line pressure to atmosphere before removal of an instrument or to assist in calibration of control devices. Swagelok purge valves are manual bleed, vent, or drain valves. The knurled cap is permanently assembled to the valve body for safety.

Bleed Valves

Specifications Working Pressure Temperature Flow Coefficient Body Material Inlet End Connection •  Type •  Size

Up to 10 000 psig (689 bar)  –65 to 850°F (–53 to 454°C)  0.25 316 stainless steel, carbon steel, alloy R-405 Male NPT, male SAE, male ISO 1/8 to 1/2 in.

More Information
Download the Bleed Valves and Purge Valves catalog.
Find bleed valves in the product search.

Features

• Vent tube directs excess liquid or gas from system lines
• Chrome-plated stem threads and tip enhance valve life
• Back stop screw prevents accidental stem disassembly
• Compact for convenient installation

Testing
Every Swagelok bleed valve is factory tested with nitrogen at 1000 psig (69 bar). Seats have a maximum allowable leak rate of 0.1 std cm³/min. Shell testing is performed to a requirement of no detectable leakage with a liquid leak detector.

Cleaning and Packaging
Every Swagelok bleed valve is cleaned and packaged in accordance with Swagelok Standard Cleaning and Packaging (SC-10).

Options

• 316 SS/ASTM A276 or A479 bar handle
• SS/ASTM A269 barbed vent tube for use with soft plastic or rubber tubing at the valve outlet.

Purge Valves

Specifications Working Pressure Temperature Body Material Poppet, Ball Material Inlet End Connection •  Type •  Size

Up to 4000 psig (275 bar) –65 to 600°F (–53 to 315°C) 316 stainless steel, brass, carbon steel . 316 stainless steel Swagelok tube fitting, tube adapter, NPT, male SAE, male ISO 1/8 to 1/2 in.

More Information
Download the Bleed Valves and Purge Valves catalog.
Find purge valves in the product search.

Features 

• Vent hole bleeds excess liquid or gas from system lines
• Cap is crimped to valve body to prevent accidental disassembly
• Compact for convenient installation

Cleaning and Packaging
Every Swagelok purge valve is cleaned and packaged in accordance with Swagelok Standard Cleaning and Packaging (SC-10).

PTFE Ball Option 
The Swagelok purge valve with PTFE ball provides leak-tight shutoff with finger pressure and features a removable cap for easy ball replacement.