High Quality Compact Seal-DDAS

I. Performance and use

The DDAS combination seal is a double acting piston seal consisting of three parts: an elastomer A, two support rings B and two guide rings C. Elastomer A has a special section with three sealing lips against the cylinder wall (dynamic seal). The middle lip is thicker and plays the main sealing role, the other two lips play a secondary sealing role. The bottom side is close to the bottom of the piston groove (static seal) and has a relatively large contact surface. Support ring B is placed on both sides of A for positioning. It supports the elastomer A and prevents radial sealing gap of A. Support ring B is stepped and has a number of bumps on the side in contact with the sealing element to prevent the seal from rotating during operation. Guide ring C is rectangular in shape and is mounted on the piston to guide and absorb axial forces. Several axial grooves are cut in the top and bottom of the guide ring to allow the pressure oil to flow through the guide ring so that the elastomer A can feel the full working pressure and quickly release the pressure when changing direction. This is a good way to prevent a continuous overpressure in front of the elastomer A.

The DDAS combination seal material gradually increases in hardness from the inside to the outside and, depending on its characteristics, acts as a seal, a support and a guide respectively.DDAS combination seal is a self-tightening double acting seal. In the initial state, the elastomer A deforms to produce a radial preload force that increases with system pressure, resulting in a full sealing force that seals even when the system is not under pressure.

DDAS combination seal is an integral seal with only - one groove for the sealing and guiding element. It is fitted with closed grooves, one for each piston. The compact seal construction results in a short overall length of the piston (cylinder), reducing machining costs and providing excellent resistance to backlash. The elastomer does not twist during operation and has a reasonable leakage and reduced friction. Mainly used for piston and hydraulic cylinder sealing. Such as: bulldozers, excavators, loaders, cranes, etc.      

Hot Tags: high quality compact seal-ddas, China, suppliers, manufacturers, factory, customized, wholesale, upi seals, ring back up, kzt seals, buna o rings, hydraulic o rings, o ring seal