Linde Polymer Tec Co.,Ltd. is one of the most experienced manufacturers and suppliers of rod hydraulic buffer seals in China, also supports customized service. Please feel free to buy high quality rod hydraulic buffer seals for sale here from our factory.
What are Rod Hydraulic Buffer Seals
Rod Hydraulic Buffer Seals are always used in conjunction with other rod seals such as U-seals or Y-seals to form a tandem configuration. Its seal helps cool temperatures, prevents excess heat from being transferred to the seal, and reduces the heat generated by the piston rod seal during operation. Provide sufficient lubrication for piston rod seals or other main seals to enhance gap extrusion resistance.
Advantages at a glance
- No adhesion to the sliding surface.
- Effective in relieving any pressure built up in the hydraulic system.
- Excellent abrasion and wear resistance.
- Providing secondary sealing to reduce the influence of the pressure spikes.
- Improving the rod seal life.
- Leak-free performance.
- Resistant against high temperature and pressure.
- Low compression set.
- The unique design of static and dynamic lips for superior performance.
Rod Hydraulic Buffer Seal
The hydraulic buffer seal, mounted on the pressure side of the piston rod seal, is designed to improve the durability of the piston rod seal by venting the pressure back to the system side. The main parts of the buffer seal are the static lip, dynamic lip, radial slots, and radial channels. The static lip of the seal is optimized with high flexibility to relieve the interstage pressure. The dynamic lip can minimize friction and backpressure under high-pressure conditions. The radial slots of the buffer seal are designed to reduce the risk of blow-by. The radial channels, a vital element in the whole seal structure, facilitate back-pumping and relieve the pressure.
In harsh conditions, machines or equipment often encounter dramatic swings in pressure, shock loads in temperature, or side loads which affect the operation of the hydraulic system. This factor presents a significant and demanding challenge for the buffer seal. The buffer seals LINDE Seals offers are especially suitable for heavy-duty, agricultural machinery, mobile, and industrial hydraulic applications, including bulldozers, earth-moving equipment, cranes, dump trucks, motorized shovels, boom extension cylinders, wheel loaders, etc.
Factors to Consider When Selecting Rod Hydraulic Buffer Seal
■ Working environment: It is important to understand the working environmental conditions in which the seal will be used. For example, consider temperature range, pressure requirements, media type (liquid or gas), presence of chemicals, and possible corrosion or wear.
■ Pressure and Load: Consider the pressure and load the seal needs to withstand. Select seals of appropriate material and design to meet the required pressure and load requirements and to prevent leakage and seal failure.
■ Material selection: Select sealing materials suitable for specific operating conditions. Common sealing materials include rubber, polyurethane, polytetrafluoroethylene (PTFE), etc. According to the requirements of the medium, temperature, and chemical substances, select materials with good wear resistance, corrosion resistance, and high-temperature resistance.
■ Dimensions and dimensional tolerances: Ensure that the seal size selected matches the requirements of the hydraulic or pneumatic cylinder and meets the relevant dimensional tolerance requirements.
product information
| Material Description | NBR, FKM rubber, and so on |
| Available Color | Yellow, black, and so on |
| Material Strength | This is used in combination with rod packing to absorb the impact and fluctuating pressures at high loads, to isolate high-temperature fluids, and to improve the durability of the packing. It has a specially shaped slit at the sliding lip that can leak backpressure and eliminates the pressure between the rod packing and the buffer ring. It is usually used with general petroleum hydraulic fluid oil. |
| Temperature | -55~+120℃ |
| Speed | 1m/s |
| Pressure | ≤50MPa |
| Applied Device | Mobile hydraulic equipment / standard cylinder/presses/excavators |
| Medium | Mineral oil-based hydraulic fluids, barely flammable hydraulic fluids, water, air, and others. |
Technical Data
| Max Gap E | E≤0.8mm | E≤0.4mm | E≤0.25mm | |
| Order Example for standard version: | ||||
| Diameter d=100mm | ||||
| Installation Dimension table based on Metric Size(mm) | ||||
| d f8 | D+0.2 | L+0.2 | H | |
| 40~190 | d+16 | 6.3 | 6 | |
| 200~220 | d+21 | 8 | 7.7 | |
*Special reminder, if you need or are interested in this product, don't hesitate to contact us and provide the corresponding drawing dimensions so we can better help you.
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