API 7# Full Open Valve Seat for Mud Pump Product Description 1.Stem-guided Valves& Cross-arms Seats Stem-guided valve and cross-arms seat features an extra wide metal to metal seal on the valve flange. The serrated upper surface on the valve gives a longer non breathing seal between valve body and insert while the rigid seat cross-arms give greater strength and positibe sealing. 2.Three-wing valves and full open seats. Three-wing guided valves and full open seats features greater fluid flow than four wing valves, the unibody forged valve features greater strength than traditional welded wing valve. Innovative unibody valve design eliminates snap rings, plates or keepers providing reduced maintenance by snap-on valve inserts and easy installation. 3.Double angle O-ring valve The Double angle O-ring valve is made with a tough one-piece body to run more hours between change outs. Its made with carburized premium alloy steel to resist wear, provide a positive seal, and help protect against wash out or damage to the pump. Brand Model Emsco F-350 F-500 F-650 F-800 F-1000 FA-1300 FB-1300 FA-1600 FB-1600 Gardener Denver PZ-7 PZ-8 PZ-9 PZ-10 PZ-11 National 7-P-50 8-P-80 9-P-100 10-P-130 12-P-160 IDECO T-800 T-1000 T-1300 T-1600 Oil Well A-350 A-560 A-650 A-850 A-1100 A-1400 A-1700 China 3NB-350 3NB-500 3NB-800 3NB-1000 3NB-1300 3NB-1600 3NB-2200