Check Valves High Pressure Check Valves Features & Benefits Prevents reverse flow which may cause damage to a pressure system Ball Seat Poppet offers metal-to-metal seat for rapid cycling or severe enviroments Soft Seat Poppet offer O-ring seat for fast shutoff and reliable seal Complete material traceability Can be manufactured to meet NACE MR-01-75 15K Check Valves - NPT Thread Our High Pressure Check Valves with NPT Thread connections rated for working pressures up to 15,000 psi. Available in Ball Seat Poppet and Soft Seat O-ring Poppet seals. 20K Check Valves - Medium Pressure Thread Our High Pressure Check Valves with Medium Pressure Thread connections rated for working pressures up to 20,000 psi. Available in Ball Seat Poppet and Soft Seat O-ring Poppet seals. 60K Check Valves - High Pressure Thread Our High Pressure Check Valves with High Pressure Thread connections rated for working pressures up to 60,000 psi. Available in Ball Seat Poppet and Soft Seat O-ring Poppet seals.