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    Ball type check valves are produced inthree sizes: 10-32, 1/8" NPT and 1/4"NPT. They are available in both brassand stainless steel and are suitable foruse with liquids or gases. Free flow occursin one direction only; reverse flowis prevented.All valve seats are metal to metal construction.Minor amounts of seat leakage can beexpected. See General Specifications.
Unit of Measure


N/A Brass

Ball Material

N/A Buna-N

Seal Material

N/A Viton

Nominal Orifice Size

N/A 31


N/A 0.02

Cracking Pressure

N/A 125 psig

Maximum Temperature

N/A 180 ºF

Maximum Operating Pressure Gauge

N/A 125 psig

Connection A

N/A 10-32 UNF Male

Connection B

N/A 10-32 UNF Female

Seat Leakage

N/A 6 SCCM (max.) air flow at greater than 50 psi differential

Orifice Diameter

N/A 0.031 in

Width Across Flats (Hex)

N/A 5/16 in

Total Length

N/A 0.485 in

Air Flow at 25 psig

N/A 20 cm³/min

Air Flow at 100 psig

N/A 40 L/min


  • All metal construction option
  • Long life operation
  • Low cost