Description: Shear pin safety valve is used at the discharge part of the mud pump.JA-3 shear pin safety valve changes the discharging pressure by changing the position of the shear pin ,which is operation easy and work reliable. Features: 1. Opening and shutting neatly. 2. Piston's bearing pressure area is small. 3. To reposition simply. 4. Safety Valve may use for multifold mud pumps. 5. flange / screw thread connection 6. Max pressure:35Mpa