Spring Check Valve Material of Construction T316L Stainless Steel Tube Size 3/4 in Connection Clamp Surface Finish 20 RA ID Overall Length 3 1/2 in Max Pressure 145 psi Cracking Pressure 1 to 3 psi Temp Range 0 to 200 Degrees F Mounting Position Vertical Seat Material Viton Spring Material T316 Stainless Steel Standards FDA Class VI Seats Certification 3A