ASTM A995 4A Check Valve

An ASTM A995 4A check valve is an automatic non-return valve cast from premium duplex stainless steel (CD3MN / UNS J92205), designed to permit one-way flow while providing immediate backflow prevention. The grade 4A metallurgy features a balanced ferritic-austenitic microstructure that delivers roughly double the yield strength of conventional 316L stainless steel alongside exceptional resistance to chloride pitting, crevice corrosion, and stress corrosion cracking. Driven entirely by line kinetics, the internal swing, piston, or tilting-disc assembly automatically lifts under forward pressure and slams shut against a hardfaced seat when the fluid decelerates. Desalination plant contractors and marine engineering networks can eliminate chloride pitting and secure reliable non-return performance by sourcing certified ASTM A995 4A check valves directly from leading manufacturers in China via our advanced B2B commercial platform.

About 8 results

ASTM A995 4A Swing Check Valve, BS 1868, 10 IN, 2500 LB, RTJ

ASTM A995 4A Swing Check Valve, 26 Inch, CL 150 LB, Flanged

ASTM A995 4A Swing Check Valve, CL 300 LB, 3 Inch, Flanged

ASTM A995 4A Swing Check Valve, CL 300 LB, 24 Inch, Flanged

API 6D Check Valve, ASTM A995 4A, 6 Inch, Class 300 LB, RF

Swing Flex Check Valve, ASTM A995 4A, 8 Inch, 900 LB, BW End

ASTM A995 4A Swing Check Valve, BS 1868, API 6D, 6 IN, CL300

ASTM A995 4A Swing Check Valves, API 6D, 4 Inch, 2500 LB, RF