SEALS

Piston seals are used as part of a hydraulic cylinder to seal in liquid. They are a vital part of a hydraulic cylinder and ensure the prevention of fluid movement across the head of the cylinder. The piston seals allow the build up of pressure on one side of the piston that powers the extension and retraction of the cylinder rod.

Piston Seals are often crafted from highly durable and malleable plastics, polyurethane and elastomers as they can withstand heat that is generated, depending on the material grade, and can consistently provide a stable and reliable seal.

Rod seals work in conjunction with other seals in the cylinder (often the wiper seal) to prevent the internal fluid leaking out from the hydraulic cylinder.

Rod seals are completely static and installed into the housing of the cylinder to seal in fluid as the rod manoeuvers within the cylinder.

Wiper seals often work in tandem with the rod seals and can be single or double acting when used in a hydraulic or pneumatic application. The wiper seal can be referred to as the scraper seal and is a vital element of a hydraulic or pneumatic cylinder.

The wiper seal is necessary to protect the interior from moisture and exterior debris. Wiper seals may, depending on the specific design, also act as a secondary barrier to catch any oil or fluid that has passed through the main seal.

Rotary seals are also referred to as oil seals. They are responsible for closing the space between the stationary and moving parts present in mechanical components. Every type of rotating equipment requires a rotary seal to work correctly as they encircle and seal the rotary element of the machinery. They are also used to control the flow of necessary lubricants through the machinery and also prevent the lubricants from leaking out from the bearings.

Guide rings act to control the centring of shafts or rods in their cylinders and have a key function in helping to prevent friction and wear in mating steel parts. The guide rings that support and separate functioning parts of a seal system can be machined by Cheshire Seals to normal engineering standards. These may be made in a variety of materials to match the operating environment.

In some applications it is necessary to provide a back-up ring to support the seal where it could be distorted under pressure. By supplying back-up, the seal can be made to operate at significantly higher pressures. Cheshire Seals may help with details of materials and design in the use of back-up seals in engineering applications.

The application of seals is many and varied. If, for example an historic or unusual machine is being rebuilt or is a new machine for an exceptional application, the company can work with the customer to create a new design and drawing that can be exported directly to the computer-controlled lathes and milling machines.

Cheshire Seals and Components produces high quality seals that work perfectly with your machinery and are long wearing, durable and dependable.