Description Description The Haskel 28201 check valve is a high-performance valve designed for applications that require high pressure and corrosion resistance. The valve is made of 316 stainless steel and has a 1/4 NPT female port. The valve can handle pressures up to 15000 psi (1000 bar) on the inlet side and 10000 psi (690 bar) on the outlet side. The valve has a spring-loaded poppet that prevents backflow and ensures reliable sealing. The Haskel 28201 check valve is ideal for use with oxygen, nitrogen, helium, hydrogen, and other gases. State of California Proposition 65 WARNINGCancer and Reproductive Harm - www.P65Warnings.ca.gov. Literature & Docs Accessories