A valve with a stem that may be mechanically actuated to three different positions by rotary or linear motion. In the first position, the valve disk is located and locked against the seat permitting no fluid flow through the valve. In the second position, one side of the valve disk is located against the seat permitting movement of the disk in a manner that will allow a flow of fluid in one direction through the valve. In the third position, the valve disk is lifted from the seat to allow a flow of fluid in either direction through the valve. The valve disk may be spring loaded. See also valve, lift-check and valve, stop-check.
Classification: Check valves of copper having a pressure rating of 850 kpa or over
NSN 5925-00-089-6131
NSN 5975-00-471-0625
NSN 5960-01-539-1956
NSN 5960-00-284-5845
NSN 6650-01-086-1270
NSN 5999-01-292-6294
NSN 5930-01-258-2801
NSN 5990-01-433-3786
NSN 5855-00-147-2508
NSN 6620-01-315-1857
NSN 6220-01-297-6149
NSN 5965-00-007-7863