Key Technical Specifications
| Product Type |
Hydraulic Tipping Value |
| Model Number |
4MPT-1220 |
| Rated pressure |
25Mpa |
| Rated flow |
220L/min |
| Air pressure control |
0.6~1Mpa |
| Working temperature |
-20 to 80℃ |
| Working medium |
Anti-wear hydraulic oil |
Product Advantages & Applications
1. Precision Slow Lowering Control for Enhanced Safety and Cleanliness
Our dump truck control valve is engineered with a dedicated slow lowering function. This critical feature allows for ultra-slow, controlled descent of the dump body, which is essential for operational safety and material preservation. When unloading sensitive or fine materials like sand, gravel, or agricultural products, this precise hydraulic control prevents sudden shifts, reduces material spillage, and minimizes dust generation. This is a vital dump truck safety feature for worksites in populated areas or environmentally sensitive locations, protecting both your assets and the surrounding environment.
2. Robust Safety Mechanisms for Maximum System Reliability
The 4MPT-1220 is designed with system integrity as a priority. It incorporates a non-return valve to securely hold the dump body in any raised position, preventing hazardous accidental lowering. The integrated, adjustable relief valve provides reliable overload protection for your entire heavy-duty dump truck hydraulic system. By allowing you to set a precise maximum pressure, it safeguards expensive components like the hydraulic pump and cylinder from damage due to shock loads or excessive pressure, significantly reducing downtime and maintenance costs.
3. Superior Corrosion Resistance for Demanding Environments
We understand that mining and construction equipment operates in punishing conditions. The valve body is treated with a high-quality electrophoretic coating, offering exceptional adhesion and superior resistance to corrosion and chipping. This enhanced protection ensures long-term, reliable performance and extends the service life of hydraulic valves, even when exposed to moisture, chemicals, and abrasive dust. This durability makes it the ideal mining and construction equipment component, reducing failure rates and total cost of ownership.
4. High-Flow Design for Unmatched Operational Efficiency
With a high rated flow of 220 L/min, this high-flow hydraulic control valve delivers powerful and fast lifting performance. In fast-paced industries like quarrying or bulk transport, time is money. The rapid cylinder extension enabled by this valve translates directly into shorter cycle times and increased productivity. This high-flow capability ensures that even under full load, your tipper truck operates at peak efficiency, maximizing your return on investment.
Selection Notes
Please confirm below parameters in advance to ensure proper matching with your dump truck hydraulic system:
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Pump Flow RateConfirm the actual output flow of your hydraulic gear pump. This valve fits for recommended flow:220L/min. Excessive flow will cause over‑heat and poor response; insufficient flow leads to slow lifting speed.
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Working Pressure & PTO OutputCheck system working pressure and PTO output speed. Rated working pressure: 20MPa. Make sure your PTO‑driven pump does not exceed the valve max pressure rating.
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Port Size & Thread SpecificationVerify thread size of inlet, outlet and return port. Match with your existing pump, cylinder and hose fittings to avoid thread mismatch and leakage.
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Mounting Installation SpaceMeasure available mounting space on chassis. Check mounting hole position, overall dimension, pipeline layout space, ensure no interference with surrounding chassis components.
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Application ScenarioMainly for medium‑size dump trucks / tipper trucks. Confirm your truck tonnage and lifting cylinder specification. Not for heavy‑duty oversize tipper without validation.
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Tank Capacity SuggestionSuggested hydraulic tank capacity: 60‑120L. Too small tank will result in high oil temperature during frequent lifting cycles.
FAQ
Q：Can I use this 4MPT‑1220 valve to directly replace my old tipping valve? What should I check first?
A：Yes, it is a common replacement part for many medium‑duty dump truck tipper systems. Before replacement, please double‑check 3 key points:
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Confirm control mode: this is pneumatic air‑operated valve, it cannot directly replace manual‑hand lever type tipping valve if your truck has no air supply circuit.
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Compare port thread size and mounting hole dimension. Mismatched thread or mounting pitch will cause leakage or installation failure.
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Match system working pressure. Our rated pressure is 20MPa, do not use for systems running over‑pressure.
If you send me photos of your original valve nameplate, I can help you quick‑verify compatibility.
Q：What pump flow and PTO speed does this tipping valve support? What will happen if flow is too high or too low?
A：The recommended operating flow range is 40‑80 L/min, rated pressure 20MPa.
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If pump flow is lower than 40L/min：lifting & lowering speed will be very slow, especially under full cargo load.
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If pump flow exceeds 80L/min：valve will overheat, internal spool suffers rapid wear, and oil leakage risk increases greatly.
Please select matched gear pump and set reasonable PTO output speed. Do not run PTO at maximum engine RPM continuously during tipping operation.
Q：My dump truck lifts slowly or cannot hold position after installing this valve. Is the valve defective?
A：Not always a valve quality problem. Please check these points step‑by‑step:
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Check whether system pressure is correctly set. Low relief pressure causes weak lifting capacity.
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Verify hydraulic tank volume. Too small tank causes aeration of hydraulic oil, resulting in position‑dropping. Recommended tank capacity:60‑120L.
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Inspect gear pump wear and cylinder internal leakage. Worn pump or seal failure of cylinder also brings slow lifting and sinking.
Only if above items are confirmed normal, we will proceed with valve‑related inspection & after‑sales support.
