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PT-1220-250
cissoko
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The PT-1220-250 is a heavy-duty, air-operated hydraulic tipping control valve designed primarily for dump trucks, tipper bodies, and multi-stage cylinder systems [Dump Truck PT/Ht 1220-250 Hydraulic Valve for Tipping, Hyva Tipping Valve Specifications Guide | PDF - Scribd]. It features a 3-way, 3-position (3/3) spool configuration with a pressureless bypass in neutral, meaning oil circulates directly back to the tank with minimal resistance when not lifting [Hyva PT Tipping Valve Specifications | PDF - Scribd]. Its standout mechanism is proportional lowering, which allows operators to safely adjust the descent speed of heavy, loaded tipper beds by modulating the pneumatic pilot control .
Pneumatic Proportional Lowering: An internal balancing spool connects to air controls for safe, modulated descent, preventing rapid frame drops.
Manual Speed Regulator: Includes an external adjustment screw for setting maximum lowering velocity independent of the pilot controller .
Versatile Mounting: Can be mounted directly to the hydraulic oil tank block or remotely on the chassis frame.
Adjustable Pressure Settings: Uses interchangeable cartridges to safely set maximum load limits [Tip Valve HT-SAE-1220-250-P1"-LC | Hyva], usually between 150 and 280 bar .
Robust Construction: Cast from high-density ductile iron to withstand high mechanical stresses.
| Parameter | Range / Value | Metric & Imperial Units | Notes |
|---|---|---|---|
| Nominal Flow Rating | 220 | L/min (approx. 58 US gpm) | High-flow design enables fast lifting of large multi-stage dump cylinders. |
| Max. Working Pressure | 250 | bar (approx. 3625 psi) | Maximum safe operating pressure the valve body can withstand under continuous stable operation. |
| Relief Pressure Range | 170 ~ 250 | bar (approx. 2465 ~ 3625 psi) | Built-in main relief valve allows precise on-site pressure adjustment based on actual tonnage requirements of the dump system. |
| Pneumatic Air Pressure | 6.0 ~ 10.0 | bar (approx. 87 ~ 145 psi) | Perfectly matches the air supply pressure of standard air brake systems for heavy trucks and various commercial vehicles. |
| Pilot Start Pressure | 0.6 ~ 1.0 | bar (approx. 8.7 ~ 14.5 psi) | Minimum air pressure to trigger slight displacement of the pneumatic spool, delivering ultra-smooth proportional micro-movement. |
| Control Method | Pneumatic Proportional | Pneumatic Proportional | Matches the proportional pneumatic handle inside the cab; the lowering speed and return flow are adjusted proportionally based on air pressure. |
| Hold Function | Yes (with integrated load check) | Integrated Load Check | When the control handle is set to neutral hold position, the cargo box can be locked at any height even with external pipeline impact. |
| Fluid Temp. Range | -25 ~ 80 | °C (-13°F to 176°F) | Equipped with low-temperature resistant, heavy-duty high-resilience sealing parts, suitable for cold northern mining areas and high-temperature southern construction sites. |
Applications
Heavy-Duty Rigid Dump Trucks (Tipper Trucks)
Acts as the primary control valve for 3-axle and 4-axle rigid tippers used in mining, quarrying, and excavation.
Controls the rapid lifting of aggregate loads (gravel, sand, stone) and ensures safe, smooth bucket lowering on uneven construction sites.
Commercial Semi-Trailers & Bulk Tipping Trailers
Manages the extensive oil volume required for large multi-stage telescopic cylinders on rear-dumping semi-trailers.
Enables precise proportional slowing when dropping long, high-capacity aluminum or steel grain and coal trailer beds.
Articulated Dump Trucks (ADTs)
Fits the compact chassis spaces of earthmoving articulated tippers, handling rapid duty cycles in rough off-road terrain.
Protects the articulated joint and main cylinders from structural stress during fast-paced material dumping.
Agricultural Dump Trailers & Silage Tippers
Controls heavy-duty farm tipping wagons and organic waste haulers that require steady, non-jerky lowering to prevent vehicle tipping on soft farm soil.
Municipal & Waste Management Vehicles
Powers large hook-lift containers and roll-off tipper systems where heavy bins must be slowly feathered down onto the truck frame during drop-off cycles.
PT-1220-250 valves are typically packaged securely to prevent damage during transit. The packaging includes:
Protective Wrapping: To safeguard the pump from environmental damage.
Custom Crates: For larger, heavier pumps, ensuring safe handling.
Documentation: Includes installation, maintenance instructions, and warranty details.
Delivery time depends on the model, customizations, and location but typically ranges from 2 to 6 weeks from the order date.
The valve features a high nominal flow rating of 220 L/min (approximately 58 US gpm), optimized for rapid tipping cycles on large multi-stage telescopic cylinders. It has a maximum working pressure capacity of 250 bar (3625 psi), with an integrated safety relief cartridge that can be field-adjusted between 170 bar and 250 bar to prevent cylinder over-pressurization.
The PT-1220-250 is engineered with a flat flange interface and integrated O-ring sealing groove, allowing it to be bolted directly to the side wall of the hydraulic oil reservoir. This tank-mount layout completely eliminates the large-diameter low-pressure return hoses normally routed from the valve back to the tank, drastically reducing leak points, saving chassis installation space, and allowing return oil to dump back into the reservoir with zero pipe resistance.
Yes, we support OEM and customization, including nameplate, packaging, and specific performance requirements. Send us your drawings or specifications for evaluation.
PT-1220-250 Valve are manufactured in compliance with international standards, ensuring high performance and reliability:
ISO 9001: Certified for quality management systems.
CE Certification: Ensures compliance with European safety, health, and environmental protection standards.
RoHS Compliance: Ensures the Valve does not contain hazardous materials.
Factory Testing: Every valve is rigorously tested for performance, pressure, and leak integrity before shipping.
1.What's our advantages?
Factory established in 2005;
With a great deal of production experience;
80+ employees become the professional team;
Constant updated ERP system ensure efficiency of work;
Sophisticated equipment ehanced the accuracy of products;
Professional salesmen provide the greast service;
With a large number of famous customers all over the world;
Great after-sales service;
With the long term cooperation with famous logistics and express company in China,provide the better goods service.
Small order/sample order,full payment in advance; Big orders send the first payment 30% before the production,and the balance before shippment.We'll show the photos of the products and packages before delivery.
Of course we can. Just send me your logo we can make it for you.
America(40.5%):USA, Canada, Argentina, Brazil
Europe(30.8%):Italy,Germany,England,Holland,Spain,Swiss,Finland,Russia,Poland.
Asia(23.5%):Korea,singapore,India,Turkey,Vietnam,Saudi Arabia,Syria, Israel,Lebanon.
Others(5.8%).
The Cissoko hydraulic pump manufacturing facility is a specialized industrial plant that focuses on producing hydraulic pumps and related components. These factories are equipped with advanced machinery and technology to fabricate high-quality pumps designed for a wide range of applications, from heavy equipment and machinery to automotive and industrial systems.
The production process typically involves precision engineering, where raw materials like metals and alloys are processed into pump components such as gears, pistons, cylinders, and seals. These parts are then assembled into fully functional hydraulic pumps, which are tested for performance and quality control to ensure reliability, efficiency, and durability under various working conditions.
Cissoko Hydraulic's manufacturing facilities for hydraulic pumps maintain stringent quality standards, often adhering to international certifications, to meet the expectations of customers in industries such as construction, agriculture, automotive, and manufacturing.
All hydraulic pumps produced by Cissoko Hydraulic have undergone compliance testing, ensuring their quality and reliability.
To meet the diverse needs of different industries, the Cissoko hydraulic offer customization options, such as specialized seals, materials, and pump configurations. These facilities often work closely with engineering teams to develop tailored solutions for specific applications, from high-pressure systems to low-flow, high-efficiency pumps.
Each pump undergoes a rigorous quality control process, where pressure tests and performance assessments are conducted to ensure that the pumps meet the required standards for flow rate, pressure capacity, and durability.
