HBY
PU
Cylinder
Rod Seal
High Pressure
O-Ring
Standard, Nonstandard
Accetable
Brown
3-7days
Piston Seal
Complete
TYS; MPI
Carton
40-190MM
Xiamen
3926901000
Product Description
HBY combined with rod seals, to absorb impact and surge pressure under heavy load in order to separate high temperature fluids and improve the service life of the seal element.
The main functions of the buffer seal in the hydraulic system include several aspects. First, it buffers the shock pressure or pressure fluctuations produced by the piston rod of the hydraulic cylinder, easing the backpressure. Second, the seal helps cooling down the temperature, prevents the overheat from transmitting to the seal, and reducing heat generated from the piston rod seal during operation. Third, it reduces the friction resistance caused by the piston rod seal in the hydraulic cylinder. In general, the buffer seal provides adequate lubrication to the piston rod seal or other main seals, and it can enhance the gap extrusion resistance. Thereby, it can extend the durability of the seal element.
Technical information
Max speed 0.5m/ s
Max pressure 21Mpa
Temperature range -45 110
MAT: NY+PU







The main functions of the buffer seal in the hydraulic system include several aspects. First, it buffers the shock pressure or pressure fluctuations produced by the piston rod of the hydraulic cylinder, easing the backpressure. Second, the seal helps cooling down the temperature, prevents the overheat from transmitting to the seal, and reducing heat generated from the piston rod seal during operation. Third, it reduces the friction resistance caused by the piston rod seal in the hydraulic cylinder. In general, the buffer seal provides adequate lubrication to the piston rod seal or other main seals, and it can enhance the gap extrusion resistance. Thereby, it can extend the durability of the seal element.
Technical information
Max speed 0.5m/ s
Max pressure 21Mpa
Temperature range -45 110
MAT: NY+PU
Code | Fucntion | Limited Condition | ||
Pressure (MPa) | Speed (m/s) | Temp. (ºC) | ||
SPGO | Piston Seals (Double Acting) | 40 | 5 | -45ºC +200ºC |
SPG | Piston Seals (Double Acting) | 35 | 1.5 | -30ºC +200ºC |
SPGW | Piston Seals (Double Acting) | 50 | 1.5 | -45ºC +200ºC |
GSD | Piston Seals (Single Acting) | 40 | 5 | -30ºC +200ºC |
DAQ | Piston Seals (Double Acting) | 40 | 2 | -30ºC +200ºC |
AQ5 | Piston Seals (Double Acting) | 40 | 2 | -30ºC +200ºC |
DAS | Piston Seals (Double Acting) | 40 | 0.5 | -30ºC +100ºC |
PG | Piston Seals (Double Acting) | 35 | 0.5 | -30ºC +100ºC |
MPA | Rod Seals (Single Acting) | 40 | 0.5 | -45ºC +120ºC |
MPB | Rod Seals (Single Acting) | 40 | 0.5 | -45ºC +120ºC |
MPR | Rod Seals (Single Acting) | 40 | 0.5 | -45ºC +120ºC |
MPS | Rod Seals (Single Acting) | 40 | 0.5 | -45ºC +120ºC |
HBY | Rod Seals (Single Acting) | 40 | 0.5 | -30ºC +110ºC |
HBTS | Rod Seals (Single Acting) | 40 | 3 | -30ºC +110ºC |
GSJ | Rod Seals (Single Acting) | 40 | 3 | -30ºC +110ºC |
GSI | Rod Seals (Double Acting) | 40 | 5 | -45ºC +200ºC |
DH-5 | Dust Sels | 2 | -40ºC +110ºC | |
DHS | Dust Sels | 2 | -40ºC +110ºC | |
GSZ5 | Dust Sels | 5 | -40ºC +110ºC | |
DKBI | Dust Sels | 3 | -30ºC +100ºC | |
DKBZ | Dust Sels | 3 | -30ºC +100ºC | |
RVA | Rod Var i Seals | 45 | 15 | -70ºC +260ºC |
GRS | Rotary Rod Seals | 30 | 1 | -30ºC +200ºC |
ROI | Rotary Rod Seals | 28 | 0.3 | -30ºC +100ºC |
BRT | Rod Seal Backup rings | 1 | -45ºC +200ºC | |
N4W | Piston Backup rings | 1 | -45ºC +120ºC | |
KZT | Dust Rings | 5 | -45ºC +200ºC | |
WR | Wear Rings | 1 | -45ºC +120ºC | |
RYT | Guide Tape | 5 | -45ºC +200ºC |
Sealing Component Storage Guidelines and Recommend-ed Shelf Life | |
Storage Recommendations: | |
Stock Control | Follow the First- In-First-Out (FIFO) princip le |
Optimal Temp. | Seals should be kept aw ay from heat sources like direct sunlight and heat-emitting objects . The maximum storage temperature is +32°C. Low temperatures w on't cause permanent damage to the seals but can make them brittle, leading to potential breakage if mishandled. Generally , the storage temperature for seals should not go below +10°C, and they should be brought to room temperature before installation. |
Avoid strong light | Surfaces should be shielded from direct sunlight and artificial light sources to prevent exposure to ultraviolet radiation. |
Moisture control | Special care should be taken during storage, and the ambient humidity should not exceed 65% . Some specific polyurethane seals that are sensitive to moisture should be stored in sealed containers |
Keep away from oxygen and ozone | Ozone and oxygen are harmful to seals . Seals should be stored in sealed containers . Any equipment that generates sparks should be kept aw ay from the storage containers . |
Keep away from | For seals to have a longer storage life, they should be kept aw ay from contaminants . The w arehouse should be kept clean. |
Avoid distortion | Large seals should be stored flat instead of hanging, as prolonged hanging can cause distortion. Seals should not be placed on hooks , nails , or metal plates . |
Recommended Shelf Life : | |
Compounds | Shelf Life |
FEPM | 7 Years |
EP,EPR,EPDM | 7 Years |
FKM | 7 Years |
NBR,HNBR,XNBR | 7 Years |
AU or EU | 10 Years |
TPCE | 10 Years |
PTFE | Unlimited |







