Ideal For Hydraulic / Pneumatic Cylinders.
Hydraulic systems are sealed using a combination of specialized seals. The main tasks of hydraulic seals are to retain hydraulic fluids, to exclude solid or liquid contaminations, maintain rod and pistons alignment and to maintain the hydraulic pressure. In extreme cases, seals need to withstand high pressures, extreme temperatures and transverse forces within the cylinder. Thus in the application, the function of Hydraulic Seals goes far beyond preventing fluid leakage. Hydraulic piston seals prevent fluid from flowing across the cylinder head whereas the Rod seals prevent leakage of fluid from within the cylinder to the outside. This results in the pressure build-up on either side of the piston, making the Cylinder extends or retracts in the opposite direction. The Sliding bearing or the Wear ring accommodates side loads, prevents metal-to-metal contact and maintain the concentricity of the hydraulic seals. The external wiper or Scraper prevents penetration of dirt and foreign liquid into the hydraulic system and helps in keeping the contamination level to a minimum. Hydraulic cylinders also require static sealing solutions including O-rings and most often backup rings
PU Rod Seal / Piston Seal
The reciprocating rod seal is one of the most critical elements in hydraulic equipment. Rod seals for hydraulic cylinders seal the system pressure on the rod side of the cylinder against the atmosphere. The seals need to withstand high pressures during the stroke phase as well as the position holding operation of the cylinder. Rod seal or Gland seals as they are often called exist in a wide variety of different types. When choosing a rod seal, it is important to define the area of application and the seals need to be chosen as per their specification and design requirement. The individual profile design shows specific behaviors and performance which need to be in line with the application´s requirements. There are single or composite designs of rod sealing systems. A leaking rod seal can cause accidents, the operational problem as well as environmental pollution. In addition to normal wear and aging, this seal is directly affected by irregularities on the rod surface. These seals are at times subjected to high and low pressure, often in combination with alternating high and low temperature. We have chosen some of the most versatile seal designs to meet these demanding requirement specifications. In some systems, a secondary rod seal or buffer seal is also used to reduce the load on the primary rod seal.