O-ring seal GGDA series

POMpartswall

The GGDA captive slide and O-Ring seal for outside sealing is a compact element for sealing cylinder pistons. It can be used with mineral oils and in modified form with water based fluids, fire resistant fluids, and compressed air. The GGDA seal consists of 4 parts, a sharp edged sealing ring of PTFE-Bronze-Compound, 2 L-shaped support rings of POM and an O-Ring as energiser. The L-shaped rings firmly support and guide the slide ring to ensure a tight seal at all times. The slide ring provides the sealing function, being pressed against the cylinder wall by the O-Ring energiser. Due to its excellent sliding characteristics, measurable wear cannot be detected even after millions of stroke cycles. When combined with cylinder tube surface finishes of Ra 0.1 -0.3 μm, static coefficients of friction are in the order of 0.05 to 0.07 at pressures up to 300 bar. At high speeds, this value increases to slightly above 0.1. This frictional characteristic means that smooth movement can be achieved even at low speeds. There is no stiction, no unacceptable heat generation, and above all no stick-slip effect.