Our check valves are mainly used for high pressure applications and workover equipments. They are usually installed in high pressure pipelines for preventing fluid flowing back. When fluid is pushed back, a retainer plate will automatically close.

Check valves, forged of high strength alloy steel based on US technologies, are fitted with unions on both ends for easy dismantlement. The retainer plate inside sulfidized with Buna-N has a good sealing effect and a longer service life under high pressure, for conventional or H2S environments.
 
The model of check valve available: D×F70-2"×2",D×F105-2"×2",D×F70-3"×3",D×F105-3"×3",rated: 10000psi(70MPa)~15000psi(105MPa).

Safety valves are overpressure protection devices for protecting personnel and equipment, and usually installed in HP operation line for cementing/fracturing pumps, pressure vessels and other equipment under HP and high displacement. The preset pressure value ranging 5000psi to 15000psi(35MPa to 105MPa) is adjusted through the top nut. When pumping pressure or operating pressure exceed the preset value, the safety valves will automatically open for pressure release. While the pressure is less than the preset value, they will be automatically closed.
 
The model of safety valve available: AQF02-105,AQF02-42,rated: 6000psi(42MPa)~15000psi(105MPa).
 
 Construction, connecting mode and size are same as SPM equivalent products;
 The butterfly spring inside can realize opening/closing of valves, therefore safety valves can protect people and equipment without shutting down relevant equipment. They are more reliable than shear type safety valves.