Standard or Nonstandard: Standard Structure: Check Pressure: HighPressure Material: A105LF2F5F11F22F304F304LF316F316LF51F55MONEL Temperature of Media: HighTemperature Media: Oil check valve is a valve to flow through it in only one direction.Check valves are two-port valves, generally are very small, simple, and/or inexpensive. Check valves work automatically and most are not controlled by a person or any external control; accordingly, most do not have any valve handle or stem. The bodies An important concept in check valves is the cracking pressure which is the minimum upstream pressure at which the valve will operate. Typically the check valve is designed for and can therefore be specified for a specific cracking pressure. Forged steel flanged end check valve150Lb~600Lb Standard Material Specification