Combination Seals Manufacturer In China
2026-07-10
Many hydraulic sealing problems cannot be solved by a single seal alone. In most hydraulic cylinders, rod seals, piston seals, wiper seals, guide rings, O-rings, and backup rings work together as a complete sealing system to prevent leakage, reduce friction, and improve equipment reliability.
At DEF Seals, we manufacture combination seals and provide custom hydraulic sealing solutions for industrial equipment worldwide. Instead of selecting individual seals by product name, we recommend evaluating the entire sealing system according to operating conditions, equipment structure, and service requirements.
What Are Combination Seals?
Combination seals refer to a group of sealing and guiding components designed to work together within one hydraulic system.
A typical hydraulic seal kit may include:
- Rod seals
- Piston seals
- Wiper seals
- Guide rings or guide tape
- O-rings
- Backup rings
- Other auxiliary sealing components
Each component performs a different function, but together they help improve sealing performance, reduce wear, and extend equipment service life.
How To Select Combination Seals？
Choosing the right combination seals requires evaluating the complete working environment instead of selecting one seal independently.
Key factors include:
- Working pressure – Higher pressure may require reinforced sealing structures and backup rings.
- Operating speed – Seal design and materials should minimize friction and heat generation.
- Temperature – Materials should match both continuous and peak operating temperatures.
- Hydraulic media – Different fluids require different material compatibility.
- Contamination – Dust, mud, and abrasive particles influence wiper seal selection.
- Side load – Proper guide components help reduce uneven wear and improve stability.
- A system-based selection approach helps achieve longer service life and lower maintenance costs.
Common Materials For Combination Seals
Material selection has a direct impact on sealing performance and durability.
DEF Seals offers combination sealing solutions using materials such as:
- PTFE for low friction and chemical resistance
- PU for excellent wear resistance
- NBR for general hydraulic applications
- FKM for high-temperature environments
- UPE for enhanced wear performance
- PEEK for demanding high-pressure applications
The appropriate material depends on pressure, temperature, media, and operating conditions rather than a single performance requirement.
Typical Applications
Combination seals are widely used in:
- Hydraulic cylinders
- Construction machinery
- Mining equipment
- Injection molding machines
- Metallurgical equipment
- Agricultural machinery
- Marine hydraulic systems
- Other industrial hydraulic equipment
Different industries require different sealing configurations based on their operating environments.
Information Required For Custom Hydraulic Seals
To recommend suitable custom hydraulic seals, our engineering team typically reviews technical information instead of product names alone.
Providing the following details helps speed up project evaluation:
- Assembly drawing
- Component drawing
- Existing seal samples
- Equipment or cylinder model
- Working pressure
- Operating temperature
- Hydraulic media
- Quantity requirements
Complete technical information allows engineers to recommend a more reliable sealing solution.
Why Choose DEF Seals?
As an experienced combination seals manufacturer in China, DEF Seals supports OEM customers and industrial equipment manufacturers with customized sealing solutions.
We provide:
- Custom hydraulic seal manufacturing
- Material selection support
- Drawing- and sample-based production
- Engineering technical assistance
Our team focuses on providing practical sealing solutions based on real operating conditions to improve equipment reliability and service life.
A reliable hydraulic sealing system depends on how every sealing component works together. By selecting the right combination of rod seals, piston seals, guide products, and auxiliary seals, manufacturers can reduce leakage, improve durability, and lower maintenance costs.
If you are looking for a professional combination seals manufacturer, DEF Seals can provide custom hydraulic sealing solutions based on your drawings, samples, and application requirements.
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Contact Us
Add：Dinghao Automatic Incubation Park, South China Industrial Park, Liaobu Town, Dongguan City, Guangdong Province
Zip: 523410
Fax：0769-83260340
Email：defseals@defseals.com