Hydraulic piston seals
Hydraulic Piston Seals & Ram Seals for Pressure Separation
Piston seals manage pressure between the piston and cylinder bore. Fitofit supports single and double acting applications, extrusion control, and material choices for demanding duty cycles.
Selection guide
Use cases, failure modes, and material direction.
This page is written to make the enquiry more useful, not just list a product name.
Applications
- Single acting cylinders
- Double acting cylinders
- Mobile hydraulics
- Industrial hydraulic presses
Common issues
- Internal bypass leakage
- Pressure cycling damage
- Extrusion gap issues
- Heat and media mismatch
Materials
PU / PTFE / NBR
Final selection depends on pressure, speed, temperature, media, and hardware condition.
Enquiry checklist
Send these details for faster selection.
Product family or seal location
Drawing, sample, or groove dimensions
Pressure, speed, and temperature
Fluid/media and operating environment
Related seal families
A better seal choice often includes companion components.
FAQ
Common questions before enquiry.
What causes piston seal bypass?
Bypass can come from wear, extrusion, incorrect groove fit, bore damage, pressure spikes, or a material mismatch.
Do piston seals need wear rings?
Wear rings often help control side load and protect the sealing interface in hydraulic cylinders.
Engineering support
Need piston seals matched to your application?
Share the product family, dimensions, pressure, temperature, media, drawing, or sample photo. Fitofit will help narrow the right direction.