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Protects pressure gauges and other pressure instrumentation from sudden surges in flow due to operator error or line failure. This valve provides dependable, tight shut-off.

Materials: 316 Stainless Steel: body, cover and sleeve. O-Ring: Viton for operation to 500°F (260°C). Buna-N or Teflon available for 250°F (121°C) or 400°F ( 204°C) respectively; specify when ordering.

Vertical Installation: Since this type of check valve employs a non-spring loaded poppet, valve MUST be installed in VERTICAL position with arrow on valve body pointing UP. (cover gland up).

Resetting Valve: Equalize the pressure across the poppet. The poppet will drop and reset automatically.

Caution: While testing has shown O-Rings to provide satisfactory service life, both cyclic and shelf life may vary widely with differing service conditions, properties of reactants, pressure and temperature cycling and age of the O-ring. FREQUENT INSPECTIONS SHOULD BE MADE to detect any deterioration, and O-rings replaced as required.

Caution: See Tubing section for proper selection of tubing.
Note: For optional material see Technical Information.

Note: All check valves are furnished complete with connection components unless otherwise specified.

All dimensions for reference only and subject to change.
For prompt service, Autoclave stocks select products. Consult your local representative.
All general terms and conditions of sale, including limitations of our liability, apply to all products and services sold.
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Item #

Fits Connection Type

Pressure Rating


Rated Cv

Add To Cart/Request Quote
SWKO4400 N/A SW-250 N/A 15000 psi1034.19 bar N/A 0.188 in4.78 mm N/A 3 Request Quote
SWKO6600 N/A SW-375 N/A 15000 psi1034.19 bar N/A 0.250 in6.35 mm N/A 5 Request Quote
SWKO8800 N/A SW-500 N/A 10000 psi689.46 bar N/A 0.375 in9.53 mm N/A 10 Request Quote
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