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HT-1220-250-VALVE
cissoko
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The HT-1220-250 Cylinder Valve is a heavy-duty, high-flow 3/3-way pneumatically operated hydraulic tipping valve engineered specifically for large commercial dump trucks and tractor-trailer tippers. Optimized for multi-stage telescopic cylinders, this valve integrates pressure relief, directional reversing, and lowering speed adjustments into a single high-strength housing. Its core advantage is its structural positioning; when mounted directly onto the cylinder inlet port, it serves a critical dual role as both an operational control valve and an integrated safety hose-burst protection valve
Proportional Lowering Control: Interlocks directly with a pneumatic cabin joystick. By adjusting air pilot pressure, the spool delicately meters return oil flow, allowing operators to infinitely vary the dump body's descending speed from a slow creep to a full dump.
Hose-Burst Safety Function: By fastening the valve directly to the SAE oil inlet of the tipping cylinder, it bypasses the need for high-pressure hoses between the valve and the actuator. If a primary pump feed hose bursts during tipping, the valve isolates the cylinder volume, stopping the heavy vehicle bed from crashing down.
Premium Heavy-Duty Build: The valve block is cast from high-grade vermicular graphite cast iron, offering immense wear resistance and thermal stability under immense dynamic pressure spikes.
Advanced Chemical Sealing: Features upgraded fluororubber (FPM/Viton) O-rings that resist extreme high temperatures, chemical degradation, and micro-permeability across harsh mining and construction environments.
Adjustable Slow-Down Limit: Features an integrated mechanical adjustment screw on the housing block allowing service technicians to calibrate the maximum baseline lowering speed to prevent operational accidents
| Parameter | Range / Value | Metric & Imperial Units | Notes |
|---|---|---|---|
| Max. Pump Flow Capacity | 220 | L/min (approx. 58 US gpm) | High-flow passage design meets the demand for fast lifting of multi-stage cylinders on heavy-duty dump trucks. |
| Maximum Relief Pressure | 250 | bar (approx. 3625 psi) | Factory preset pressure limit of the safety relief valve to protect cylinders and the system from overpressure damage. |
| Pneumatic Pilot Pressure | 6.0 ~ 12.0 | bar (approx. 87 ~ 174 psi) | Perfectly matches the air supply pressure of standard on-board air brake systems for all heavy commercial vehicles and trucks. |
| Pilot Start Pressure | 0.6 ~ 1.0 | bar (approx. 8.7 ~ 14.5 psi) | Low response air pressure at which the pneumatic directional spool starts slight displacement for delicate proportional speed reduction. |
| Max. Tank Backpressure | 10 | bar (approx. 145 psi) | Maximum continuous backpressure allowable at port T (return port) during continuous operation. |
| Hose-Burst Protection | Yes (Direct Mount Type) | Integrated Safety | Directly mounted at the cylinder inlet port. The valve will instantly lock the cylinder if the inlet hose bursts suddenly. |
| Adjustable Slow-Down Limit | Yes (Mechanical Screw Adjustment) | Mechanical Adjuster | The valve is equipped with a travel limit screw, allowing technicians to forcibly limit the maximum lowering flow rate. |
| Housing Material | Vermicular Cast Iron | Vermicular Cast Iron | Features excellent fatigue resistance, wear resistance and dimensional structural stability under high pressure. |
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.
HT-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 has a maximum flow capacity of 220 L/min (approx. 58 US gpm), designed to handle big-displacement systems requiring rapid tipping cycle times. It features a factory-preset maximum relief valve pressure of 250 bar (3625 psi) to protect large multi-stage telescopic cylinders from over-pressurization.
The valve housing is outfitted with an adjustable slow-down limit screw. This built-in mechanical stopper allows fleet mechanics to mechanically calibrate and lock the maximum baseline lowering speed of the dump bed. This provides a critical safety backup that prevents the bed from dropping too quickly, even if an operator pulls the cabin joystick to the maximum descent position.
Yes, we support OEM and customization, including nameplate, packaging, and specific performance requirements. Send us your drawings or specifications for evaluation.
HT-1220-250 Valve 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.
