HHD Series Heavy Duty Hydraulic Cylinders

49 SPECIALS/Engineering Data Specifications and prices are subject to change without notice or incurring obligations. Tel: 352-373-3578; Fax 352-375-8024 • email: service@fabco-air.com OPERATING FLUIDS AND SEALS STANDARD SEALS Standard seals are what is normally provided unless otherwise specified. Seals provided are generally nitrile and intended for use with: air, mineral-based hydraulic oils and nitrogen within normal operating temperatures of -10°F to +165°F. P.T.F.E. back ups are used where required. LOADED LIP SEALS Loaded lip seal designs are pre-energized to help seal in low pressure applications. In high pressure applications the loaded seal expands even more to increase pressure on the sealing surface to ensure a bypass free seal. Loaded lip seals are an extremely durable, high compression seal design. FLUOROCARBON SEALS Provided when higher temperature service is intended. Used with some Phosphate Ester fluids (with exception of Skydrols) and many fire resistant formulas. Fluorocarbon seals can be operated within -10°F to +250°F. They may also be used to +400°F with shorter seal life expectancy. For applications over +250°F, cylinders must be ordered with the piston set screwed to piston rod. P.T.F.E. back ups will be provided as needed. HI-LOAD SEALS Seal combination of one or two bronze filled Teflon rings with elastomer expander underneath, with a pair of wear bands on the outer edges. This configuration is virtually leak-free under static conditions and compatible with high pressures. The configuration is also capable of handling high sideload applications. CAST IRON PISTON RINGS Offering the widest operating conditions in temperatures, pressures and fluids, this configuration can be used in many applications. Note: cast iron rings do allow a small amount of bypass that increases with bore size and pressures used. COMMON PISTON CONFIGURATIONS STANDARD PISTON U CUPS AND TEFLON BACK-UPS CAST IRON PISTON LOADED LIP PISTON LOADED U CUPS WITH ENERGIZER TEFLON BACK-UPS HI LOAD PISTON TEFLON GLIDE RINGS WITH ELASTOMER EXPANDERS ANDWEAR BANDS STEEL OR CAST IRON PISTON CAST IRON RING PISTON STEP CUT CAST IRON RINGS CAST IRON PISTON CAST IRON PISTON 12-7-16