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Mpt-1220-250 Tipping Valves with Slow Drop Function

The MPT-1220-250 (also commonly referred to as the MPT-1220 or the compatible Hyva PT-1220 ) is a multi-functional integrated pneumatic tipping valve designed specifically for single-acting hydraulic cylinders in dump trucks.

Model:
Mpt-1220-250
Brand:
cissoko

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Product Description

PC-1220-250-1 Pneumatic 1 Way Directional Control Valve

Overview

The PC-1220-250 (usually the full model number is PC-1220-250-1 ) is a high-performance pneumatic 1-spool tipping valve/directional control valve , primarily used in the hydraulic systems of dump trucks, garbage compactors, loaders, and construction and agricultural machinery.

Features and Benefits

It greatly improves operational safety: especially in cases of uneven ground, narrow spaces, or when materials in the carriage are not completely unloaded, "slow descent" can avoid the risk of rollover caused by uneven material loading .
Extending vehicle hardware lifespan: The "descent control" function effectively absorbs and eliminates hydraulic shocks (water hammer effect) in the oil circuit, preventing the heavy-duty carriage from violently impacting the subframe , thereby protecting the main beam, cylinders, and bearings.
Precise unloading control: When laying gravel or asphalt at a construction site, the operator can activate the "slow descent" function while driving the vehicle to precisely control the tilt angle of the truck bed and achieve precise operation of laying materials at a uniform speed while driving .

Technical Data:

Rated pressure	Rated flow	Air pressure control	Working temperature	Working medium
25Mpa	220L/min	0.6~1Mpa	-20 to 80ºC	Antiwear hydraulic oil

Applications

1. Heavy-Duty Dump Trucks

When transporting heavy materials such as ore, coal, and wet soil, the center of gravity of the carriage is extremely high. With the slow descent function , the driver can smoothly lower the tens of tons of carriage back to its original position, preventing the carriage from damaging the main beam (frame) and avoiding the risk of overturning due to uneven material loading or uneven ground [made-in-china.com].

2. Road Construction Vehicles
When laying asphalt, gravel, or sand, trucks need to unload while driving. Using the slow-descent function , operators can fine-tune and precisely control the tilt angle and return speed of the truck bed, thereby achieving a refined operation of laying materials at a uniform speed while driving [made-in-china.com].

3. Semi-trailer end dumpers and long chassis end dumpers
Long-chassis semi-trailer dump trucks are most unstable when raised to their highest point, and are prone to overturning in windy conditions or on slightly tilted ground. The slow-descent function eliminates the shock (water hammer effect) caused by sudden hydraulic return, ensuring a safe and smooth descent of the long cargo box.

4. Municipal Waste Trucks
Commonly used in large-capacity compactor garbage trucks, hooklift garbage trucks, and sewage/vacuum trucks . When dumping high-density, viscous wet waste or waste liquid at landfills or unloading sites, the slow-descent function can precisely control the container's posture, preventing the liquid or heavy object from shaking excessively and causing danger.

5. Agricultural Tipping Trailers
Large agricultural grain or silage trailers use this valve on soft, uneven ground such as farms and fields to safely and slowly lower high-capacity silos while avoiding overhead power lines or obstacles.

Packaging & Delivery

Valve 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.

Mpt-1220-250 Valve FAQ:

1: How does the "Slow Drop" function of this MPT-1220-250 work?

A: It's achieved through pneumatic pilot proportional control. Its valve core design supports progressive opening . When used with the pneumatic control handle (air valve) in the cab, the angle at which the handle is pushed or pulled determines the air pressure input to the tipper valve, thus precisely controlling the hydraulic oil return speed. Pushing it less results in a slower descent of the truck bed; pushing it all the way down causes the truck bed to descend rapidly.

2: What is the difference between it and the PC-1220-250 valve mentioned earlier?

A: The core difference lies in the structural form and installation location.

The PC-1220-250 is an integrated explosion-proof self-unloading valve , typically mounted directly on a hydraulic cylinder. Its key selling point is the explosion-proof pipe safety locking feature.
The MPT-1220-250 is a standard Hyva-type self-unloading valve , which is typically mounted directly on the hydraulic tank or the truck chassis beam . Its key selling point is its integrated four-in-one function : lifting, stopping, rapid lowering, and fine-tuning slow lowering .

3: Why is the "slow descent" function so important for dump trucks? Can't they just descent quickly?

A: Rapid descent is extremely dangerous in certain heavy-load scenarios. If a heavily loaded wagon weighing tens of tons is lifted and then rapidly lowered, the enormous inertia will cause a violent impact on the vehicle's main beam, subframe, and hydraulic cylinders upon impact (water hammer effect). Furthermore, on soft ground or when materials inside the wagon have not completely adhered to the ground, rapid descent can easily cause a momentary imbalance, leading to a rollover . Slow descent completely eliminates these hazards.

4: Can the MPT-1220-250 directly replace the original Hyva PT-1220 valve?

A: Yes, they are 100% interchangeable. Whether produced by domestic manufacturers like Boxin Huasheng or Chengfeiyue, the MPT-1220-250 adopts internationally recognized standards in key parameters such as mounting hole positions, G1-inch inlet/outlet ports, air pipe connector size, and 220 L/min flow rate [bxhshydraulic.com, made-in-china.com]. It can serve as a seamless upgrade or cost-effective replacement for classic Hyva valves.

5: How to properly adjust the system pressure of the built-in relief valve of this valve?

A: The valve body has a dedicated pressure adjusting screw (usually protected by a lead seal or lock nut). Although the valve has a maximum pressure resistance of 250 bar, it is usually preset to a standard pressure according to customer requirements at the factory. If on-site adjustment is required, a hydraulic pressure gauge must be connected to the oil circuit . Loosen the lock nut, turn the adjusting screw clockwise to increase the pressure, and counterclockwise to decrease the pressure. Note that when adjusting the pressure, never exceed the maximum pressure limit of the system's oil pump and cylinder.

6. Do you provide OEM or customized services

Yes, we support OEM and customization, including nameplate, packaging, and specific performance requirements. Send us your drawings or specifications for evaluation.

Certifications & Quality Assurance

Valves 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.

FAQ

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.

2.What is your payment terms?

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.

3.Can you make my own brand on the products?

Of course we can. Just send me your logo we can make it for you.

4.What is our main export market?

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%).

Unedited footage of the Green Hydraulic Factory

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.

Unedited footage of the Green Hydraulic Factory3

All hydraulic pumps produced by Cissoko Hydraulic have undergone compliance testing, ensuring their quality and reliability.

Unedited footage of the Green Hydraulic Factory4

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.

Unedited footage of the Green Hydraulic Factory5

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.