| Product Type | Hydraulic Tipping Value |
| Model Number | PT-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 |
The PT-1220 Proportional tipping valve is a high-performance hydraulic valve specifically engineered for heavy-duty dump trucks. It features a center-bypass spool design that allows proportional flow control during lowering via a pneumatic pilot valve. With integrated check and adjustable relief valves, it ensures reliable system protection under high-pressure conditions up to 25 MPa and flows of 220 L/min. The valve body is treated with an electrophoretic coating for superior corrosion and salt spray resistance. Suitable for open hydraulic systems with single-acting cylinders, it supports lift, neutral hold, and proportional lowering functions, providing precise and safe operation in challenging environments.
The PT-1220 enables proportional tipping valve in dump truck applications, allowing operators to precisely regulate the speed of the truck bed descent by adjusting the air pilot valve position. This significantly improves operational safety, especially on uneven terrain or during unloading in confined spaces. Unlike conventional valves that offer only on/off lowering, this proportional feature reduces hydraulic shock and load instability, meeting the critical industry demand for safe and controlled dumping cycles.
Equipped with a proprietary adjustable relief valve for hydraulic systems, this valve offers high opening pressure ratio, exceptional sensitivity, and strong contamination resistance. It provides reliable overload protection for single-acting cylinders up to 25 MPa, preventing failure under sudden shocks or extreme loads. This dump truck relief valve with high anti-pollution ability is essential for harsh environments such as mining and construction, where system durability and minimal downtime are top priorities.
The valve body features a uniform electrophoretic coating for salt spray resistance, drastically improving adhesion and corrosion protection compared to conventional finishes. This makes the valve especially suitable for dump trucks operating in corrosive environments such as coastal areas or winter road conditions where de-icing salts are used. The enhanced coating ensures long service life and reduces maintenance costs.
With a high flow capacity of 220 L/min and support for installation on the oil tank or other custom locations, this valve offers exceptional flexibility in system design. It is an ideal proportional valve for open hydraulic systems using single-acting cylinders, commonly found in heavy-duty mining and construction dump trucks. The high flow rating supports faster lifting cycles, improving vehicle productivity.
Q：Can this pneumatic tipping valve directly replace Hyva original valve? What’s the interchangeability?
A：Our PT series pneumatic tipping valve follows mainstream Hyva-type mounting dimensions, port positions and connection layout. It can be directly used as replacement for the original valve. Please confirm oil port size, air control interface and limit port before purchase.
Q：What is the rated working pressure? Does it have built-in overload pressure protection?
A：Rated working pressure is 250 bar. An integrated overflow valve is equipped inside the valve. It will release pressure automatically under overload conditions to protect the hydraulic pump and lifting cylinder from damage.
Q：What vehicles can this hydraulic tipping valve fit? Can it match your bidirectional hydraulic gear pump?
A：It is widely used for dump trucks, tippers, waste trucks and mining dumper. Perfectly matched with our FLYBY bidirectional hydraulic gear pump and PTO to form a complete tipper lifting hydraulic system.
Q：Do you accept sample orders? Can you support OEM custom logo? How long is the warranty?
A：Sample orders are available. OEM service including brand logo printing is supported. We provide 12 months warranty under correct installation and normal working conditions.
