Lip seal GGDI series

O-ringPAPTFE

The GGDI captive slide and O-Ring seal for inside sealing is a compact element for sealing piston rods. It can be used with mineral oils, water base fluids and in modified form with other fluids. The GGDI seal consists of 4 parts, a sharp edged sealing ring of PTFE -Compound, 2 L-shape support rings of POM (PA from Ø 400 mm), and an O-Ring as energiser. The L-shape 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 piston rod 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.