Pneumatic safety check valves automatically cut off the air flow when a drastic change in flow is detected. Safety check valves are recommended in most, and OSHA required in many, pneumatic tool to compressor applications. The valve senses the change in air flow and shuts off in the event of a surge in pressure to prevent hose whip. The valve resets automatically when the line is re-pressurized. Install at the source of the pneumatic supply line and each branch line between the air source and the tool. Each size is available in a variety of preset SCFM cut-off rates for compatibility with most pneumatic tools.
Not recommended for applications requiring 100 percent of available air supply
- Available from 1/4″ Through 3″
- Will not restrict air flow
- M NPT inlet X F NPT outlet (BSPP/BST by special order)
- Complies with OSHA Regulation 1926.302(b)(7)
- Maximum working pressure 250 PSI air service
- Solid bar stock brass body, stainless steel spring and roll-pin, Buna-N seals
- An anodized aluminum version is available in 90-100 SCFM cut off range in 1/2 and 3/4 sizes only
- Open ball valves slowly to prevent accidentally triggering the check valve from the sudden change in flow
*OSHA 29 CFR 1926.302(b)(1): Pneumatic power tools shall be secured to the hose or whip by some positive means to prevent the tool from becoming accidentally disconnected. Additionally 1926.302(b)(7) states: All hoses exceeding ½-inch inside diameter shall have a safety device at the source of supply or branch line to reduce pressure in case of hose failure.
*Check directly with any regulating agencies that oversee your workplace to ensure compliance
The check valve should be the same diameter as the hose that will be used, do not increase or decrease the hose size from the compressor or manifold after the check valve is installed. Do not use a check valve of a different size to reach a desired SCFM cut off range.
In order for us to assist in selecting a Pneumatic Safety Check Valve, please contact us with the following information:
•Hose Diameter (ID) • Operating pressure, SCFM of the compressor • SCFM draw of the air tool
WARNING: Cancer and reproductive harm. Visit www.P65warnings.ca.gov for additional information.
Per Section 1417 of the Safe Drinking Water Act (SDWA) use Lead free parts in all consumable water applications. Lead free refers to the wetted surface of pipes, fittings and fixtures in potable water systems that have a weighted average lead content = 0.25%. Source: California Health & Safety Code (116875). Vermont Act 193*171NLF