Offshore Seals (Asia) Pte Ltd © 2010
Pneumatic & Hydraulic Seals
We manufacture a wide range of standard and custom sized seal for Pneumatic / Hydraulic cylinders.
These include :
Buffer Seals
Dust / Wiper Seals
Rod Seals
Piston Seals
Backup Ring
Wear / Guide / Slide Rings or Tapes
O-
X-
Vee Packing Seals
T-
Our unique machining facility enables us to customize the seal size to fit your equipment, plus minimum order of just 1 piece. We offer seals from 5 mm to 2500 mm in diameter.
Details on the part numbers and sizes or custom made seals not listed here are available on request.
Selection of a Seal
The selection criteria are generally the requirements, which have to be met by a seal.
- It must achieve the required degree of tightness.
- Be made from a material with adequate elasticity and dimensional stability to compensate for variations of the cylinder inner diameter.
- Be resistance to extrusion, even a large gap at high pressure.
- Must have good compatibility with the media throughout the working temperature range. A low swell is necessary.
- Must have a good sliding feature (low friction), high abrasion resistance and be easy to install and replace.
- The material should not wear and allow particles to enter the system.
In addition to these, there are other operating conditions, which affect our analysis.
Some of these are as follows :
- The system pressure. The seal must be able to operate at high pressures and still be tight at low pressures.
- The stress imposed by the variations of the pressure when working.
- The location of the equipment, outdoor or indoor.
- The working temperature range.
- The installation conditions.
- The length of stroke and frequency.
- The speed of movement.
- The expected friction, like stick slip behavior.
- The operating and stationary periods.
- Type and characteristic of seal materials.
- The media specification and compatibility with the material
These conditions have an effect on the performance of the seal service life, leakage, friction, wear and reliability. These are important and influence the selection of the optimum seal shape and material.
Installation of a Seal
Another important factor to consider in order to obtain the best performance of the seal is that the seal must be installed correctly. The sealing edge of the seal must be protected from damage during installation as they are the parts which perform the sealing contact point. Remember, seals are the parts that control the efficient working of the equipment and should be treated with care during installation.
Please contact us for more details on installation procedures.
