An angle seat piston valve is a pneumatically-controlled valve with a piston actuator providing linear actuation to lift a seal
off its seat. The seat is set at an angle to provide the maximum possible flow when unseated. Angle seat piston valves are
particularly suited to applications where high temperatures and large flow rates are required, such as steam or water. When used
in reverse some models of angle seat piston valve will eliminate water hammer when operated.