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Summary of Contents for Ralston Instruments QTHP
- Page 1 EN Hydraulic Hand Pump (QTHP, XTHP) Operation Manual For all models of QTHP, XTHP Hydraulic Hand Pumps...
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Page 3: Table Of Contents
Table of Contents Specifications ................2 Requirements................3 Hydraulic Hand Pump Overview ..........4 Important Safety Notices ............5 Setting Up ..................6 Calibration ..................14 Venting System ................17 Storage and Transport ..............18 Maintenance ................20 Troubleshooting ................21 Support ..................23... -
Page 4: Specifications
10,000 PSI / 700 bar / 70 MPa Media Compatibility Alcohol, Antifreeze, Ethylene Glycol, Hydraulic Oil, Mineral Oil, Petroleum Based Oil, Windshield Washer Fluid Seal Materials Buna-N, Teflon Teflon, Viton Fine Adjustment Resolution 0.1 psi / 0.7 mbar / 70 pa (QTHP and XTHP) -
Page 5: Requirements
* ralstoninst.com/adapters What you need to use your Hydraulic Hand Pump: 1. Wrenches 2. Thread Tape 3. QTHP Pump - Quick-test adapter (included), XTHP Pump - Quick-test XT adapter (included) 4. Device Under Test 5. QTHP Pump - Quick-test hose (included), XTHP Pump - Quick-test XT hose (included) 6. -
Page 6: Hydraulic Hand Pump Overview
1. Liquid Reservoir Vent Plug with integral pressure relief valve 2. Liquid reservoir 3. Fluid Return Hole 4. Outlet port: QTHP pump - Male Quick-test, XTHP pump - Quick-test XT 5. Fine Adjust Piston 6. Bleed Valve 7. Priming Piston (XTHP pump only) -
Page 7: Important Safety Notices
Important Safety Notices Important Safety Notices WARNING: Do not exceed Maximum Working Pressure for this product or damage may result. WARNING: Do not open vent valve if there is pressure from the process on the pump or liquid reservoir can shatter or explode. WARNING: Device under test should be isolated from the process, vented and vent valve closed prior to use. -
Page 8: Setting Up
Setting Up Fill included bottle with one of the recommended fluids: • Ralston Calibration Oil • Hydraulic Oil • Light Motor Oil • Transmission Fluid • Water Acceptable Fluids (Drain and flush pump when not in use): • Antifreeze • Alcohol... - Page 9 Connecting Reference Gauge Male NPT Reference Gauge 1. Reference Gauge with NPT male connection 2. QTHP pump - NPT female Quick-test adapter, XTHP pump - NPT female Quick-test XT adapter...
- Page 10 Male BSPP Reference Gauge 1. Reference Gauge with BSPP male connection 2. BSPP Washer 3. QTHP pump - BSPP female Quick-test adapter, XTHP pump - BSPP female Quick-test XT adapter...
- Page 11 Female NPT Pressure Reference Gauge 1. Reference Gauge with NPT female port 2. QTHP pump - NPT male Quick-test adapter, XTHP pump - NPT male Quick-test XT adapter 3. QTHP Pump - Quick-test hose, XTHP Pump - Quick-test XT hose...
- Page 12 Connecting Device Under Test (DUT) ¼ – ¾ 0.25 – 0 .75...
- Page 13 QTHP Pump hand pump until fluid comes out of the end of the pressure hose. XTHP Pump priming piston until fluid comes out of the end of the pressure hose.
- Page 14 Isolate the Device Under Test (DUT) from the process and vent DUT prior to connecting to it.
- Page 15 Repeat step 6 while connected to the Device Under Test until no bubbles escape the Fluid Return Hole.
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Page 16: Calibration
Calibration Prepare the Pump for Calibration Open Bleed Valve. Set Fine Adjust Valve to 50% of travel. 100% Close Bleed Valve tightly. - Page 17 Increase Pressure Test point Pump to just below test point. Fine-adjust to exact test point. Let pressure reading stabilize. This may take several minutes. Repeat steps 1 and 2 for each test point up-scale.
- Page 18 Decrease Pressure Test point Fine-adjust to exact test point. Repeat for each test point down-scale.
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Page 19: Venting System
Venting System When finished testing, open the bleed valve and vent the remaining pressure from the system. -
Page 20: Storage And Transport
Storage and Transport... - Page 21 If using water, alcohol, Ethylene Glycol or other non-lubricating fluid in the pump, then drain that liquid and fill the pump at least up to the check-valves with a light weight oil prior to long-term storage. * Ralston Hydraulic Hand Pump Carrying Case (QTHP-0275). Sold separately.
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Page 22: Maintenance
Maintenance Maintenance Interval Every 300 uses or 3 months Maintenance Procedure • Clean and lubricate the Inlet and Outlet Check Valves with a light-weight oil. • Lubricate the Quick-test fittings by squirting 2 ml of oil inside the connection. • Lubricate the threads on the fine adjust piston with a graphite-based grease, such as Dow Corning G-n Metal Assembly Paste (or equivalent). -
Page 23: Troubleshooting
The pump will not prime. If the pump will not prime, then follow the instructions below: 1. Remove the inlet check valve plug (QTHP) or the primer assembly (XTHP). 2. Inspect the inlet check valve O-ring for debris or damage. Clean/replace/ lubricate as needed. - Page 24 The process connection leaks. If the process connection leaks, then you may have used too much thread tape. 1. Disconnect from the device under test. 2. Remove the thread tape. 3. Use only 2–3 turns of thread tape. 4. Reconnect to the device under test. If the issue was not resolved by these troubleshooting instructions, then please contact support listed on page 23.
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Page 25: Support
Support Hours: 8:30 am – 5:00 pm EST Phone: 1 440-564-1430 • Toll Free: 1 800-347-6575 (US and Canada) Web: ralstoninst.com/support Email: support@ralstoninst.com Parts and Service: ralstoninst.com/QXHP... - Page 26 Notes...
- Page 28 Hydraulic Hand Pump (QTHP, XTHP) Operation Manual For all models of QTHP, XTHP Hydraulic Hand Pumps ralstoninst.com Hours: 8:30 am – 5:00 pm EST Phone: 1 440-564-1430 Toll Free: 1 800-347-6575 (US and Canada) Support: ralstoninst.com/support • Parts and Service: ralstoninst.com/QXHP Email: support@ralstoninst.com...
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