Parker / Autoclave Engineers FCD - Medium Pressure O-Ring Check Valves

Provide unidirectional flow and tight shut-off for liquids and gases with high reliability. When differential drops below cracking pressure*, valve shuts off. (Not for use as relief valve.)

Materials: 316 Stainless Steel: body, cover, poppet and cover gland. 300 Series Stainless Steel: spring Standard 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.

Cracking Pressure: 20 psi (1.38 bar) ±30%. Springs for higher cracking pressures (up to 100 psi (6.89bar)) available on special order for O-ring style check valves only.

Minimum operating temperature for standard o-ring check valves 0°F (17.8°C).
For low temperature option to -423°F (-252°C) add suffix LTTO (Low temperature spring & Teflon o-ring).

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: Special material check valves may be supplied with four flats in place of standard hex.

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.

Unit of Measure

Items	CXO4400 Medium Pressure O-Ring Check Valves	CXO6600 Medium Pressure O-Ring Check Valves	CXO9900 Medium Pressure O-Ring Check Valves	CXO12 Medium Pressure O-Ring Check Valves	CXO16 Medium Pressure O-Ring Check Valves
Fits Connection Type	N/A SF250CX	N/A SF375CX	N/A SF562CX	N/A SF750CX	N/A SF1000CX
Pressure Rating	N/A 20000 psi1378.93 bar
Orifice	N/A 0.125 in3.18 mm	N/A 0.218 in5.54 mm	N/A 0.359 in9.12 mm	N/A 0.516 in13.11 mm	N/A 0.688 in17.48 mm
Rated C_v	N/A 0.28	N/A 0.84	N/A 2.30	N/A 4.70	N/A 7.40
A - Length	N/A 2.94 in74.68 mm	N/A 3.12 in79.25 mm	N/A 4.18 in106.17 mm	N/A 5.50 in139.70 mm	N/A 6.63 in168.40 mm
B - Length	N/A 2.50 in63.50 mm	N/A 2.62 in66.55 mm	N/A 3.50 in88.90 mm	N/A 4.75 in120.65 mm	N/A 5.75 in146.05 mm
C - Length	N/A 0.38 in9.65 mm	N/A 0.47 in11.94 mm	N/A 0.53 in13.46 mm	N/A 0.62 in15.75 mm	N/A 0.72 in18.29 mm
D - Typical Hex	N/A 0.5 in12.70 mm	N/A 0.62 in15.75 mm	N/A 0.94 in23.88 mm	N/A 1.19 in30.23 mm	N/A 1.38 in35.05 mm
HEX	N/A 0.81 in20.57 mm	N/A 1.00 in25.40 mm	N/A 1.38 in35.05 mm	N/A 1.75 in44.45 mm	N/A 1.87 in47.75 mm
Tubing Engagement Depth	N/A 0.55 in14.0 mm	N/A 0.69 in17.6 mm	N/A 0.81 in21.0 mm	N/A 1.00 in25.4 mm	N/A 1.38 in35.0 mm