Model QZ-9 mud pump is a horizontal triplex single acting piston pump complying to API standard. Main Specification: xxxxx Power input: 1000HP 2. Stroke Length: 9" 3. Max. RPM: 130 4. Gear Ratio: 4.48:1 5. Jack shift speed: 582 6. Piston load: 101,550Lbs 7. Weight:44,052Lbs 8. More detail specification is available upon request.