Piston Seals · PGS
Operating Conditions
| Pressure | Up to 30 MPa with mineral oil (depending on seal material) |
| Speed | Up to 15 m/s with linear movements |
| Temperature | -45 °C to +200 °C. Depending on seal and O-Ring material |
| Media | Mineral oil and other fluids with very high lubricity depending on temperature, seal and O-Ring material compatibility |
| Clearance | The maximum permissible radial clearance Smax is shown in Installation Dimensions as a function of the operating pressure and functional diameter. |
Important Note : The above data are maximum values and cannot be used at the same time, e.g. the maximum operating speed depends on material type, pressure, temperature and gap value. Temperature range also depends on media.
Recommended Materials
The following material combinations have proven effective for short-stroke and/or high-frequency applications:
PGS in PS8WM
All round material for hydraulic applications with linear, short- stroke and/or high-frequency movements in mineral oils and fluids having high lubricating properties:
| O-Ring | NBR 70 Shore A | N |
| FKM 70 Shore A | V | |
| depending on medium and temperature | ||
| Set Code | PS8WMN or PS8WMV |
PGS in PS61B
For medium to heavy applications with linear, short-stroke and/ or high-frequency movements in mineral oils:
| O-Ring | NBR 70 Shore A | N |
| FKM 70 Shore A | V | |
| depending on medium and temperature | ||
| Set Code | PS61BN or PS61BV |
Materials for PGS
Installation Dimensions - Standard Recommendations
| Series No. | Bore Diameter DN H9 | Groove Diameter | Groove Width | |
| Standard Application | Available Range | d1 h9 | L1 +0.2 | |
| PGS | 8 - 14.9 | 8 - 140.0 | DN - 5.0 | 2.2 |
| PGS | 15 - 39.9 | 14 - 260.0 | DN - 7.5 | 3.2 |
| PGS | 40 - 79.9 | 22 - 480.0 | DN - 11.0 | 4.2 |
| PGS | 80 - 132.9 | 40 - 750.0 | DN - 15.5 | 6.3 |
| PGS | 133 - 329.9 | 110 - 750.0 | DN - 21.0 | 8.1 |
| Series No. | Radius | Radial Clearance Smax | O-Ring Cross Section | ||
| r1 max | 10 MPa | 20 MPa | 30 MPa | d2 | |
| PGS | 0.4 | 0.25 | 0.20 | 0.15 | 1.78 |
| PGS | 0.6 | 0.40 | 0.35 | 0.20 | 2.62 |
| PGS | 1.0 | 0.45 | 0.40 | 0.20 | 3.53 |
| PGS | 1.3 | 0.55 | 0.45 | 0.25 | 5.33 |
| PGS | 1.8 | 0.60 | 0.50 | 0.30 | 7.00 |
Ordering Guide
PGS complete with O-Ring, standard application:
| Series | PGS |
| Bore Diameter | DN = 80.0 mm |
| TMK Part No. | PGS0800063 |
PGS 0800 063 PS8WM N
1 2 3 4 5
| 1 | TMK Series No. |
| 2 | Bore Diameter x 10 |
| 3 | Groove Width x 10 |
| 4 | Material Code ( Seal Ring ) |
| 5 | Material Code ( O-Ring ) |
