Mud Pump Expendables factory Best-all four-web, center-guided valve has been one of the most popular valve styles in the oil field. It is the preloaded polyurethane insert secured with a threaded retainer plate with knock-off lugs for easy disassembly. This design enables drillers to change valve inserts quickly and minimizes downtime. The valve is best suited for low- to medium-pressure drilling operations because of the two-piece assembly of the valve body. The center-guided design enables the valve flange to be supported under pressure loads by the top of the center-support webs in addition to the seating taper on the inside of the valve seat. This allows for a large bearing area for the valve that minimizes stress and promotes a long service life. Our standard valve is offered with polyurethane inserts rated for 170掳 to 180掳F (77掳 to 82掳C) drilling-mud temperatures. We also offer a special high-temperature urethane compound as an option for high-temperature drilling conditions to 220掳F (104掳C) and higher. 100% interchangeable with Mission, Southwest, Bake SPD and other brands. Size available as below. API SIZEValveSeatInsertSpring API 5060152907061102703062400080055413389 API 5M060152907061102729062400080055413371 API 6060152808061102653062400106055413389 API 6M060152808061102604062400106055413421 API 7060155041061101507062400338055413397 API 7M060155041061102505062400338055413421Mud Pump Expendables factory website:http://www.bp-mudpump.com/mud-pump-expendables/