HPB Double-Acting Piston Seal adopts PU+NBR combination structure, wear-resistant bidirectional piston seal for medium-high pressure hydraulic cylinders. Fit agricultural & construction machinery, custom sizes & materials available.
Item NO.:
HPBOrder(MOQ):
50Payment:
T/TProduct Origin:
ChinaShipping Port:
ShanghaiProduct Description
HPB piston seal is a double-acting composite seal consisting of a polyurethane sliding ring and an O-ring that serves as a preload element. It is suitable for applications involving hydraulic oil in hydraulic cylinders.
This piston seal offers excellent dynamic and static sealing performance. The sliding ring and O-ring can be flexibly selected from different materials based on the specific fluid medium and operating temperature, meeting diverse operating conditions.
Its unique annular design ensures uniform radial pressure distribution, effectively preventing seal displacement and extrusion, and maintaining a reliable seal even under high-pressure shock conditions.
Technical Data
| Parameter | Value |
| Operating temperature | -30°C to +120°C |
| Working Pressure | ≤ 25 MPa |
| Surface speed | ≤ 0.5 m/s |
| Material | PU + NBR |
| Design type | Double Acting Piston Seal |
| Unit system | Metric |
Advantages
Polyurethane sliding rings offer exceptional wear resistance, significantly extending seal service life.
Maintains excellent sealing performance in both dynamic and static conditions, adapting to a wide range of operating conditions.
The O-ring combination design features a small axial dimension, making it suitable for small, compact hydraulic cylinders.
Simply press it in from the outer diameter; no special tools are required. Apply lubricant before installation to complete the process.
Product Parameter Table
| Designation | Rod diameter | Housing groove diameter | Housing groove width | Primary sealing element |
| [mm] | [mm] | [mm] | ||
| HPB 40X29X4.2 M6112 | 29 | 40 | 4.2 | PU + NBR |
| HPB 45X34X4.2 M6112 | 34 | 45 | 4.2 | PU + NBR |
| HPB 50X39X4.2 M6112 | 39 | 50 | 4.2 | PU + NBR |
| HPB 55X44X4.2 M6112 | 44 | 55 | 4.2 | PU + NBR |
| HPB 60X49X4.2 M6112 | 49 | 60 | 4.2 | PU + NBR |
| HPB 63X52X4.2 M6112 | 52 | 63 | 4.2 | PU + NBR |
| HPB 65X54X4.2 M6112 | 54 | 65 | 4.2 | PU + NBR |
| HPB 70X59X4.2 M6112 | 59 | 70 | 4.2 | PU + NBR |
| HPB 75X64X4.2 M6112 | 64 | 75 | 4.2 | PU + NBR |
| HPB 75X59.5X6.3 M6112 | 59.5 | 75 | 6.3 | PU + NBR |
| HPB 80X64.5X6.3 M6112 | 64.5 | 80 | 6.3 | PU + NBR |
| HPB 90X74.5X6.3 M6112 | 74.5 | 90 | 6.3 | PU + NBR |
| HPB 95X79.5X6.3 M6112 | 79.5 | 95 | 6.3 | PU + NBR |
| HPB 100X84.5X6.3 M6112 | 84.5 | 100 | 6.3 | PU + NBR |
| HPB 105X89.5X6.3 M6112 | 89.5 | 105 | 6.3 | PU + NBR |
| HPB 110X94.5X6.3 M6112 | 94.5 | 110 | 6.3 | PU + NBR |
| HPB 115X99.5X6.3 M6112 | 99.5 | 115 | 6.3 | PU + NBR |
| HPB 120X104.5X6.3 M6112 | 104.5 | 120 | 6.3 | PU + NBR |
| HPB 125X109.5X6.3 M6112 | 109.5 | 125 | 6.3 | PU + NBR |
| HPB 130X114.5X6.3 M6112 | 114.5 | 130 | 6.3 | PU + NBR |
| HPB 135X114X8.1 M6112 | 114 | 135 | 8.1 | PU + NBR |
| HPB 140X119X8.1 M6112 | 119 | 140 | 8.1 | PU + NBR |
| HPB 145X124X8.1 M6112 | 124 | 145 | 8.1 | PU + NBR |
| HPB 160X139X8.1 M6112 | 139 | 160 | 8.1 | PU + NBR |
| HPB 165X144X8.1 M6112 | 144 | 165 | 8.1 | PU + NBR |
| HPB 180X159X8.1 M6112 | 159 | 180 | 8.1 | PU + NBR |
| HPB 185X164X8.1 M6112 | 164 | 185 | 8.1 | PU + NBR |
| HPB 200X179X8.1 M6112 | 179 | 200 | 8.1 | PU + NBR |
| HPB 210X189X8.1 M6112 | 189 | 210 | 8.1 | PU + NBR |
HPB Piston Seal
 |
|
| Material codes | M6112 |
| Pressure | High Pressure |
| Speed | Up to 0.5 m/s (1.6 ft/s) |
| Temperature range |  |
 |
Extreme low temperature range: may be intermittently exposed (e.g. cold start-up) without seal damage, but seal performance may be compromised while in this range |
 |
Temperatures below the recommended operating range: seal performance depends on system design (precision guiding arrangement recommended) |
 |
Recommended operating temperature range for this profile and material |
 |
|
 |
Extreme high temperature range: only occasional short-term exposure (e.g. cylinder in curing oven of a powder coating process) |
| Dimension standards | Designed to fit standard housing dimensions according to ISO 5597:2010. |
| Size list | → Metric |
| Maximum values of application parameters (e.g. pressure, speed, temperature, e-gap) should not be applied continuously nor simultaneously. | |
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