Industrial seal is a sealing components that helps join systems, mechanisms or other materials together by preventing leakage (e.g. in a pumping system), containing pressure, or excluding contamination. Industrial seals cover a wide range of designs, materials, and pressure ratings.
Industrial Seals Types
· O-Rings
Let’s start with the O-ring. Almost every maintenance kit includes them, and for good reason. O-rings are small, inexpensive, and extremely versatile. They work in static sealing (like a flange joint) or dynamic sealing (like a hydraulic piston).
Materials: NBR is common for oil resistance; FKM handles higher temperatures and chemicals; silicone works well in low-temperature environments; and FFKM is the choice for extreme chemical resistance.
Performance: They can withstand pressures up to 35 MPa in many hydraulic systems, depending on groove design.
· Oil Seals
Whenever shafts rotate, oil seals are involved. Electric motors, transmissions, engines, and agricultural machinery all rely on them to keep lubricant in and contaminants out.
Designs: Single lip, double lip, and spring-loaded types.
Materials: NBR for standard use, FKM for high-heat, and ACM for automotive applications.
Hydraulic equipment lives or dies by its seals. A piston seal or rod seal failure means downtime and expensive repairs.
Applications: Excavators, presses, steel plant machinery.
Pressure: Often 40 MPa or more.
Materials: Polyurethane, PTFE, and NBR dominate.
· Pneumatic Seals
Pneumatic systems don’t face high pressure, but they do face constant motion. In robotics, automation, and valve control, a pneumatic cylinder may cycle tens of thousands of times per day.
Pressure: 0.3–1.0 MPa.
Materials: NBR to reduce friction and extend life.
Gaskets and Combination Seals
For large-scale equipment such as engines, ships, and turbines, gaskets and combination seals are common. A metal-rubber gasket, for instance, balances rigidity and flexibility, making it ideal for fluctuating thermal and vibration loads.
What Buyers Care About
From talking with distributors and wholesalers, three concerns come up repeatedly:
· Stock availability: Repairs can’t wait weeks; they need same-day or next-day delivery.
· Customization: Non-standard diameters, unusual materials, or special profiles are often required.
· Technical backup: Guidance on which material or structure to use saves both time and cost for end users.
About DEDE
With over three decades in sealing technology, DEDE has built both capacity and trust. The company operates an in-house manufacturing facility and is recognized as a leader in the sealing industry. Today, DEDE’s catalog includes O-rings, oil seals, hydraulic and pneumatic seals.
The service offering is built around three pillars:
· Standard seals in stock: covering more than ten thousand specifications, ready for urgent needs.
· Customization support: from material selection and design to full-scale production and testing.
· Technical expertise : helping clients optimize sealing performance, cut maintenance costs, and improve reliability.
DEDE products are exported to over 80 countries and the company is recognized as a Provincial Technology Innovation Center, Specialized Enterprise, High-Tech Enterprise, and a leading brand in regional industrial clusters. Partnerships with well-known global brands further underline its credibility.
Industrial seals might be small, but they decide whether a pump leaks, a gearbox overheats, or a robot arm keeps moving without interruption. O-rings, oil seals, hydraulic seals, pneumatic seals and gaskets all serve different roles, yet together they form the backbone of reliable machinery.
For distributors and resellers, the key is not only knowing which type fits where, but also working with a supplier who offers availability, customization, and real technical support. That’s where DEDE positions itself, we not just as a manufacturer, but as a long-term partner ensuring that machines in industries like automotive, hydraulics, energy, robotics, and heavy equipment run the way they should.
