The BCV Series Brass Check Valve is available with inlet and outlet sizes of 1/4 inch and 3/8 inch Male and Female NPT threads, and 1/4 inch Male Flare. This Check Valve has no elastomer to create a seal. It will have a positive seal only at high back pressure, so there may be some leakage past the seat in low pressure applications. The cracking pressure on the 302 Stainless Steel spring is 1 psi (standard), 3.7, 5, 10, 14 and 18 psi. Maximum operating pressure is 2500 psi and the maximum operating temperature is 180˚ F.
The 490 Series seal options are Buna-N, EPDM and Viton®. The cracking pressure on the 302 Stainless Steel spring is 1/2 psi, 1 (standard), 3, 6, 10, 30, 40, 55 and 70 psi. The maximum operating pressure is 3000 psi and the maximum operating temperature is 180˚ F. These Check Valves are designed for high press applications.