DAS Style Compact Seals
(5 Piece Seal) *Unless Specified
The DAS style compact seals are self-acting double-acting seals. The radial forces acting on the elastic rubber sealing element after installation are superimposed by the system pressure. This results in a total sealing contact force which increases as the system pressure rises. Even when no system pressure is present, good sealing is achieved. A wide mounting surface also provides additional protection against shifting or twisting of the sealing element.
Applications:
The DAS compact seal is used as a sealing element for pistons and hydraulic cylinders for reciprocating motion such as earth moving machines, hydraulic excavators, cranes, forklift trucks, hydraulic tailgates, agricultural machines, etc.
Materials:
The inner sealing element is made of nitrile rubber (NBR), or Viton® (FKM) on select sizes, which is extremely wear-resistant and has a low compression set and high tensile strength. The material has a hardness of approximately 75 Shore A. The back-up rings are made from polyester elastomer with protective and additional lubricating additives, and the material is known for its high strength and heat resistance. The guide-rings are made of thermoplastic material reinforced with glass fibres and additional additives. This material is characterized by high pressure resistance and good resistance to alternating thermal stresses.
Advantages:
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Closed groove, one piece piston.
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Short-overall length of the piston.
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Only one groove for seal and guidance.
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Low cost production of the piston.
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Free selection of piston material.
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High resistance to gap extrusion.
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No twisting or turning of the elastic sealing element.
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Good leakage values.
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Snap-on assembly possible.
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Can be used to replace many other compact seal design.
Operating Ranges:
Pressure Range: up to 40MPa (400 bar)
Temperature Range: -40°C - +110°C (-40°F - +230°F) *Capable of higher temperature with use of Viton® sealing element*
Speed: up to 0.5 m/s
Operating Media: Hydraulic fluids and lubricants based on mineral oils.