HPK Rubber Piston Seal combines a modified nylon sealing ring with an elastomer energizer for excellent wear resistance, low friction, and high-pressure sealing performance. Ideal for heavy-duty hydraulic equipment operating under demanding conditions.
Item NO.:
HPKOrder(MOQ):
50Payment:
T/TProduct Origin:
ChinaShipping Port:
ShanghaiProduct Description
HPK Rubber Piston Seal is a robust composite sealing solution designed for heavy-duty hydraulic applications. It consists of a split modified nylon sealing ring and an elastomer energizer, combining excellent sealing performance with superior wear and extrusion resistance.
As a reliable double acting piston seal HPK, the seal delivers stable operation under high-pressure conditions and remains insensitive to pressure spikes. Its low breakaway and running friction ensure smooth cylinder movement without stick-slip, even at low speeds. The split-ring design also allows easy installation without special tools, making it an ideal choice for demanding hydraulic systems where durability and reliability are essential.
Technical Data
| Parameter | Value |
| Operating temperature | -30°C to +110°C |
| Working Pressure | ≤ 50 MPa |
| Surface speed | ≤ 1 m/s |
| Material | NBR+Nylon |
| Design type | NBR Piston Seal |
| Unit system | Metric |
Applications
HPK piston seal is widely used in heavy hydraulic equipment, hydraulic presses, construction machinery, mining equipment, and other high-load hydraulic systems. It is particularly suitable for applications operating under extremely high pressure, with working pressures up to 80 MPa and even higher in certain conditions.
Product Parameter Table
| Designation | Rod diameter | Housing groove diameter | Housing groove width | Primary sealing element |
| [mm] | [mm] | [mm] | ||
| HPK 32X21X4.2 M4000 | 21 | 32 | 4.2 | NBR+Nylon |
| HPK 40X29X4.2 M4000 | 29 | 40 | 4.2 | NBR+Nylon |
| HPK 50X39X4.2 M4000 | 39 | 50 | 4.2 | NBR+Nylon |
| HPK 55X44X4.2 M4000 | 44 | 55 | 4.2 | NBR+Nylon |
| HPK 60X49X4.2 M4000 | 49 | 60 | 4.2 | NBR+Nylon |
| HPK 63X47.5X6.3 M4000 | 47.5 | 63 | 6.3 | NBR+Nylon |
| HPK 63X44.7X7 M4000 | 44.7 | 63 | 7 | NBR+Nylon |
| HPK 70X59X4.2 M4000 | 59 | 70 | 4.2 | NBR+Nylon |
| HPK 75X54X8.1 M4000 | 54 | 75 | 8.1 | NBR+Nylon |
| HPK 80X59X8.1 M4000 | 59 | 80 | 8.1 | NBR+Nylon |
| HPK 80X64.5X6.3 M4000 | 64.5 | 80 | 6.3 | NBR+Nylon |
| HPK 85X64X8.1 M4000 | 64 | 85 | 8.1 | NBR+Nylon |
| HPK 90X69X8.1 M4000 | 69 | 90 | 8.1 | NBR+Nylon |
| HPK 90X74.5X6.3 M4000 | 74.5 | 90 | 6.3 | NBR+Nylon |
| HPK 95X74X8.1 M4000 | 74 | 95 | 8.1 | NBR+Nylon |
| HPK 100X84.5X6.3 M4000 | 84.5 | 100 | 6.3 | NBR+Nylon |
| HPK 105X84X8.1 M4000 | 84 | 105 | 8.1 | NBR+Nylon |
| HPK 110X94.5X6.3 M4000 | 94.5 | 110 | 6.3 | NBR+Nylon |
| HPK 115X94X8.1 M4000 | 94 | 115 | 8.1 | NBR+Nylon |
| HPK 120X99X8.1 M4000 | 99 | 120 | 8.1 | NBR+Nylon |
| HPK 125X104X8.1 M4000 | 104 | 125 | 8.1 | NBR+Nylon |
| HPK 125X109.5X6.3 M4000 | 109.5 | 125 | 6.3 | NBR+Nylon |
| HPK 130X109X8.1 M4000 | 109 | 130 | 8.1 | NBR+Nylon |
| HPK 135X114X8.1 M4000 | 114 | 135 | 8.1 | NBR+Nylon |
| HPK 140X119X8.1 M4000 | 119 | 140 | 8.1 | NBR+Nylon |
| HPK 145X124X8.1 M4000 | 124 | 145 | 8.1 | NBR+Nylon |
| HPK 150X129X8.1 M4000 | 129 | 150 | 8.1 | NBR+Nylon |
| HPK 160X139X8.1 M4000 | 139 | 160 | 8.1 | NBR+Nylon |
| HPK 165X144X8.1 M4000 | 144 | 165 | 8.1 | NBR+Nylon |
| HPK 170X149X8.1 M4000 | 149 | 170 | 8.1 | NBR+Nylon |
| HPK 175X154X8.1 M4000 | 154 | 175 | 8.1 | NBR+Nylon |
| HPK 180X159X8.1 M4000 | 159 | 180 | 8.1 | NBR+Nylon |
| HPK 190X169X8.1 M4000 | 169 | 190 | 8.1 | NBR+Nylon |
| HPK 200X179X8.1 M4000 | 179 | 200 | 8.1 | NBR+Nylon |
| HPK 210X189X8.1 M4000 | 189 | 210 | 8.1 | NBR+Nylon |
| HPK 220X199X8.1 M4000 | 199 | 220 | 8.1 | NBR+Nylon |
| HPK 230X209X8.1 M4000 | 209 | 230 | 8.1 | NBR+Nylon |
| HPK 240X215X8.1 M4000 | 215 | 240 | 8.1 | NBR+Nylon |
| HPK 250X229X8.1 M4000 | 229 | 250 | 8.1 | NBR+Nylon |
| HPK 270X249X8.1 M4000 | 249 | 270 | 8.1 | NBR+Nylon |
| HPK 280X255.5X8.1 M4000 | 255.5 | 280 | 8.1 | NBR+Nylon |
| HPK 300X272X9.5 M4000 | 272 | 300 | 9.5 | NBR+Nylon |
| HPK 320X292X9.5 M4000 | 292 | 320 | 9.5 | NBR+Nylon |
HPK Piston Seal
 |
|
| Material codes | M4000 |
| Pressure | High Pressure |
| Speed | Up to 1 m/s (3.2 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 |
 |
Temperatures above the recommended operating range: acceptable only with reduced pressure, speed, e-gap and/or with the use of a full-face anti-extrusion ring |
 |
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 |
| Additional information | → Double-Acting Piston Seal |
| Maximum values of application parameters (e.g. pressure, speed, temperature, e-gap) should not be applied continuously nor simultaneously. | |
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