Parker check valves feature stainless steel poppets with soft seats in sizes 200 through 800/1020. Available in brass, steel and stainless steel in sizes 1/8 through 2 inch. Thread types include NPT, SAE, BSPT and BSPP. Choose from many different cracking pressures. Colorflow brand Parker flow control valves for your hydraulic metering applications are also readily available.