Ball and spring check valve
Product Announcement from Pneuline Supply, Inc.
Plastic Check Valve made from nylon, polypropylene or Kynar with springs of 1/2,1, 2, 3, 5 PSI. Springs are 302 stainless with a 316 stainless ball. Optional is a hastelloy spring and PTFE ball for polypro. Seals of EPDM, Buna and Viton. Barb sizes of 1/8, 3/16 and 1/4 inch, 1/8 and 1/4 MNPT outlet is optional. Mix and match barb ends.