Graco SP1B.0056 SaniForce 1040, 1" High Sanitation Pneumatic Diaphragm Pump, SS Center, BN Seats, BN Balls, BN Diaphragms brand baileigh Built in relief valve helps reduce safer and more effective Built in relief valve helps reduce pressure in over inflated tires the Wren B valve is designed to withstand the demands of heavy duty use 3 Power Source Pneumatic Pump Ratio 1:1 Pump Type High Sanitation Seat Material 316 Stainless Steel Series 1040 HS Surface Finish 32 Ra Tri Clamp Connection Size 1 inch Type Pneumatic Diaphragm Pump Weight (lb) 55 Maximum Air Pressure (bar) 8 Maximum Air Pressure (kPa) 800 Maximum Flow Rate (L min) 155 Maximum Fluid Pressure (bar) 8 Maximum Fluid Pressure (kPa) 800 Maximum Solid Size (cm) 1 54 Fluid Passage Size (in) 1 Fluid Passage Size (mm) 25