Hydraulic Seal Bronze PTFE Filled Piston Seal Oring DPT
DPT
Quantity:
1. Application and properties
Suitable for double-acting sealing of reciprocating motion piston, especially for fast-response cylinders in control
cylinders, servo cylinders, machine tools and construction machinery.
It has a low friction coefficient, wear resistance, and a long service life. It can work with or without lubrication and can be used for non-oil lubrication cylinder seals.
The adaptability to working media and working temperature range can be changed by replacing the material of the O-ring. Can be used in special working conditions such as extremely high speed, extremely low speed, micro-stroke, etc.
Suitable for integrated pistons and the installation groove is small, which is conducive to design cylinder size
Complies with the standards of GB/T 15242.1-94 and GB/T 15242.3-94.
Good extrusion resistance and can adapt to larger installation clearances.
Different cross-section products can be selected according to the actual working pressure value. Generally, the larger the working pressure, the larger the cross-section product should be selected.
This seal is particularly suitable for frequent and rapid directional changes in hydraulic cylinder applications
2. Standard material
Sealing ring: filled PTFE
O-Ring: NBR / FKM
3. Working conditions
Working Conditions | ||||
Diameter Range | Pressure Range | Temperature Range°C | Speed | Medium |
8～2000mm | 0～40MPa | -30～100(NBR) -20～160(FKM) | 1.5m/s | Hydraulic oil, flame retardant liquid, water |
4. Related Dimensions:
The maximum values of R1 are shown in the table below.R2=0.5～1;C=(0.5～1.0)L；The specific values are selected according to the section size of the seal. The remaining values are listed in the table below:
| Bore Diameter | Groove Diameter | Groove Width | Radius | Radial Clearance e | O-Ring | ||||
| D | Cross- | ||||||||
| Section | |||||||||
| Standard Application | Light Application | Heavy Duty Application | d | L | R1 | 10 MPa | 20 MPa | 40 MPa | d2 |
| 8～14.9 | 15～39.9 | — | D-4.9 | 2.2 | 0.2 | 0.3 | 0.2 | 0.15 | 1.78 |
| 15～39.9 | 40～79.9 | — | D-7.5 | 3.2 | 0.3 | 0.4 | 0.25 | 0.15 | 2.62 |
| 40～79.9 | 80～132.9 | 15～39.9 | D-11 | 4.2 | 0.5 | 0.4 | 0.25 | 0.2 | 3.53 |
| 80～132.9 | 133～329.9 | 40～79.9 | D-15.5 | 6.3 | 0.6 | 0.5 | 0.3 | 0.2 | 5.33 |
| 133～329.9 | 330～669.9 | 80～132.9 | D-21 | 8.1 | 1 | 0.6 | 0.35 | 0.25 | 6.99 |
| 330～669.9 | 670～999.9 | 133～329.9 | D-24.5 | 8.1 | 1 | 0.6 | 0.35 | 0.25 | 6.99 |
| 670～999.9 | — | 330～669.9 | D-28 | 9.5 | 2 | 0.7 | 0.5 | 0.3 | 8.4 |
| >1000 | D-38 | 13.8 | 2.5 | 1 | 0.7 | 0.3 | 12 | ||
5. Marking method:
Mark it with the dimensions of Installation groove
For example: The Standard DPT T series Piston seal φ100 marking DPT100×84.5×6.3
6.Installation Dimensions:
Refer to GSF Installation Dimension table
