Hydraulic Seals
Hydraulic seals control pressurised fluid in reciprocating cylinders. They retain oil, exclude contamination, guide moving parts and help the cylinder convert fluid pressure into controlled linear motion.
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Hydraulic Rod SealsHydraulic rod seals are dynamic gland seals that retain pressurised fluid where a reciprocating rod leaves a cylinder. 
Hydraulic Piston SealsHydraulic piston seals are dynamic seals fitted around a cylinder piston to separate the two pressure chambers. 
Hydraulic Buffer SealsA hydraulic buffer seal is a primary rod-side seal placed ahead of the main rod seal to moderate pressure peaks. 
Snap-In Hydraulic Wiper SealsA snap-in hydraulic wiper seal is an elastic scraper fitted at the cylinder head to clean a retracting rod. 
Metal-Cased Hydraulic Wiper SealsA metal-cased hydraulic wiper seal is a rigid press-fit scraper with an elastomer or polymer wiping element. 
Hydraulic Guide Rings & Wear StripsHydraulic guide rings and wear strips are non-metallic bearing elements that centre rods and pistons inside cylinders. 
Chevron V-Packing SetsChevron V-packing sets are stacked sealing assemblies with multiple V-shaped rings between supporting adapters. 
Hydraulic Cylinder Static SealsHydraulic cylinder static seals are shaped rings used between stationary barrel, gland, cap or manifold interfaces. 
Hydraulic Cylinder Seal KitsHydraulic cylinder seal kits are matched collections of dynamic seals, static seals, wipers and guide elements for a particular cylinder rebuild. Questions about hydraulic seals
What dimensions are needed for a hydraulic seal quote?
Send the rod or bore diameter, groove diameter, groove width and seal height in millimetres. Add the cylinder function, fluid, motion direction and a clear cross-section photograph. An equipment drawing or readable part reference is useful when the gland cannot be measured.
How do I choose a hydraulic seal material?
Start with the hydraulic fluid, working temperature, pressure behaviour, sliding speed and exposure to dirt or water. Polyurethane suits many wear-intensive cylinder duties, while NBR, FKM (fluoroelastomer), PTFE and engineered plastics address different chemical, friction and extrusion needs.
Should a cylinder rebuild use a complete seal kit?
A complete kit is useful when all sealing and guiding elements are being renewed together. Confirm the exact cylinder identity and dimensions because visually similar cylinders can use different profiles. Inspect the rod, bore and grooves before fitting new seals, since damaged hardware can cause repeat leakage.