Piston Seals
SW/PS-074
SW/PS-077
SW/GL-754
U-CUP PISTON SEALS
| PRESSURE | MATERIALS | FEATURES | APPLICATIONS |
|---|---|---|---|
| 5500-6000 PSI | PU | Rectangular seal | Mobile |
| Temperature Range | Nitrile | Scrapper lip | hydraulic |
| Range | Viton | Improved stability | Agricultural |
| (50)-+250˚ F | EPDM | Improved wear resistance | General |
| VELOCITY | Industrial | ||
| 3.2 Feet/Sec (0.7 feet/sec for asymmetrical U-Cup) | Low pressure sealing |
GLYD RING
| PRESSURE | MATERIALS | FEATURES | APPLICATIONS |
|---|---|---|---|
| 5000 PSI | Bronze | Low friction | Mobile hydraulic |
| Temperature Range | PTFE | Long service life | Agricultural |
| (65)-+400˚ F | Carbon Graphite PTFE | General Industrial | |
| VELOCITY 3.2 Feet/Sec | Moly PTFE | Heavy duty |
T SEAL
| PRESSURE | MATERIALS | FEATURES | APPLICATIONS |
|---|---|---|---|
| 5000 PSI | Nitrile | Square seal for stability | Retrofit standard industrial O ring grooves |
| Temperature Range | Viton | Low pressure sealing | |
| (65)-+400˚ F | EPDM | Anti extrusion rings | |
| VELOCITY 0.4 Feet/Sec | NBR NYLON PTFE | Dynamic sealing surface |
PISTON SEALS
| PRESSURE | MATERIALS | FEATURES | APPLICATIONS |
|---|---|---|---|
| 5000-5500 PSI | PU | Square seal for stability | Mobile hydraulic |
| Temperature Range | NBR | Energized seal | Agricultural |
| (50)-+250˚ F | O ring grooves | Heavy duty vacuums | |
| VELOCITY | Low pressure seal ability | Heavy duty hydraulic | |
| 0.3-0.7 Feet/Sec | Forklift | ||
| Forklift Standard hydraulic cylinders | |||
| Cranes Stabilizer Presses |
O Rings
O-Rings are often used as reciprocating seals in hydraulic and pneumatic systems. While best suited for short stroke, relatively small diameter applications, O-Rings have been used successfully in long stroke, larger diameter applications. O-Rings are used to prevent the passing of air or fluid. In other words, O-Rings are used to keep fluid or air IN or OUT of a defined space.
TYPES OF WIPER SEALS
| PRESSURE | MATERIALS | FEATURES | APPLICATIONS |
|---|---|---|---|
| 5000-5500 PSI | NBR PU EPDM |
Hardness Tensile strength |
Mobile hydraulic Agricultural |
| Temperature Range | EPDM NEOPRENE |
Elongation Resistance to fluid |
General industrial Medium duty cycle |
| (20)-+200˚ F | VITON PTFE | Compression force High temperature effect | High duty cycle |
Back-up Rings
Back-up Rings or anti-extrusion rings are thin rings that are that are designed to prevent O-Ring extrusion under pressure. They fit in the gland between the seal and the clearance gaps to provide zero clearance. These are used when the fitting clearance between the sealing surface of the O-Rings is large enough to allow the O-rings to extrude all certain working pressure. A number of materials can be used for Back-up rings , but PTFE has the benefit of a very low friction in dynamic applications.
| PRESSURE | MATERIALS | FEATURES | APPLICATIONS |
|---|---|---|---|
| 5000-5500 PSI | NBR PU |
Prevents seals from extruding through spaces while under pressure | Mobile hydraulic |
| Temperature Range | VITON | Agricultural General industrial |
|
| (40)-+240˚ F | PTFE | Medium duty cycle High duty cycle |
Assembly Suggestion
Incorrect seal assemblies cause damage to the lips and other parts of the seal, during the assembly process the following factors must be taken into consideration.
- All parts must be clean, without contamination, metal score marks, welding splatter or any kind of defect.
- Avoid using pointed and sharp metal tools and avoid keeping the seal in a deformed position for long periods of time.
- All seals and connecting parts must be lubricated before assembly using the same compatible fluid that will be used in the hydraulic system.
- The seal must not come into contact with corners, holes wrongly beveled or threads during assembly.
- Check the dimensions, roughness and beveling shape properly.