NBR FKM Rubber Seal ED Rings Factory for Oil Resistant Hydraulic 

Our ED Rubber Seal Rings are high-performance NBR and FKM sealing components designed for hydraulic fittings, pneumatic connectors, hydraulic plugs, adapter fittings, and threaded oil ports. These oil-resistant hydraulic sealsprovide reliable axial static sealing and excellent leak prevention under high pressure. Compared with traditional O-rings, ED sealing rings feature a specialized sealing profile that helps maintain sealing stability in demanding applications. Available in NBR and FKM rubber materials, these hydraulic seal rings offer excellent oil resistance, wear resistance, compression resistance, and dependable sealing performance. We provide custom ED seal rings, hydraulic rubber seals, and pneumatic sealing rings in various sizes and specifications, ensuring accurate dimensions, easy installation, and long-lasting performance for industrial fluid power systems.

Advantages:

1. Minimal mechanical deformation of the cross-section
2. No relative movement during pressure cycles
3. Long-lasting, excellent sealing performance
4. Working pressure up to 60 MPa

ED O-Rings Detail Specifications

ED Rings Size Measurement

Measure exact inner diameter, outer diameter and thickness by vernier caliper or digital caliper before purchase.

DIN3869 ED Axial Static Seal Ring

• ID = Inner Diameter
• OD = Outer Diameter
• T1 / T2: Thickness at both ends of the chamfer
• 120° ±5°: Angle of the sealing chamfer, characteristic design of ED seal rings

The ED ring relies on this pair of 120° chamfers for axial static sealing at hydraulic thread ports, with a maximum pressure resistance of 60 MPa.

NBR and FKM ED Rings Feature

Black Rubber NBR ED Rings :

Resists high and low temperatures, flexible, waterproof and oil proof

Green Fluororubber FKM ED O-rings: 

Pressure-resistant, efficient sealing, anti-twisting, wear-resistant

NBR rubber ring :

Waterproof & Oilproof

Working Temperature ：

NBR: -30°C ~ 120°C

FKM: -30°C ~ 220°C，can up to 240℃

FKM ED O-Ring :

Anti-Twist & Wear Resistant

Stable Structure, Long Lifespan
Mature Process, Durable & Cost-Effective

Application Fields

NBR ED Seal Ring With excellent oil resistance, it is suitable for conventional oil-water working conditions such as automobiles, ships, general hydraulic equipment and general engineering machinery. It works well in ambient-temperature mineral oil environments with high cost performance, widely used in ordinary industrial sealing applications.

FKM ED Seal Ring It features high temperature resistance, acid & alkali resistance, corrosion resistance and aging resistance. It is suitable for harsh working conditions including chemical equipment, special hydraulic systems and high-temperature machinery. It can withstand higher temperature and corrosive media, ideal for scenarios requiring reliable sealing performance.

Quality & Inspection

• Appearance & Dimension ：Check surface defects, ID, OD and cross-section
• Mechanical Properties：Shore A hardness, tensile strength, elongation at break, tear strength
• Compression：Reflect resilience under pressure, critical for long-term leak-proof sealing
• Fluid Resistance & Aging ：NBR for mineral oil; FKM for high temp & chemicals; aging & low temp brittleness test
• Sealing Performance ：Hydrostatic leakage test, temperature cycling & pressure pulse test

Order Process

Inquiry — Send us the model, size, material and quantity
Quotation — Confirm price, sample, lead time and solution
Place Order — Confirm the PI and pay the deposit
Production — Standard or custom manufacturing with full QC
Inspection & Delivery — Inspected, packed and shipped with tracking
After-sales Support — Warranty and ongoing technical assistance

Packing & Payment & Shipping

• Package:We provide standard cartons, pallets and wooden cases. Custom packaging such as custom logo print is available upon request to protect goods well for different shipments.
• Payment Methods:Multi-currency settlement (CNY, USD, EUR, etc.). Multiple payment options including T/T, PayPal. Local bank transfer is available for some countries for faster transactions.
• Shipping Ways:We offer international express, air freight, sea freight and railway transport. You can also appoint your own forwarder for flexible delivery arrangements.

Our Product Range

As a professional rubber seal manufacturer, we provide reliable sealing solutions for hydraulic, machinery and industrial equipment. Our main products cover O-rings, ED rings, lip oil seals, gaskets, flat washers and solid rubber balls and special shaped rubber seals. We support OEM & ODM, with flexible customization on size, material and shape to meet your unique requirements.

• O-rings: standard series and custom sizes
• ED Rings: hydraulic flat face sealing rings
• Oil seals: rotary shaft and lip seals
• Gaskets, washers & flat seals: molded or die-cut
• Rubber balls: solid rubber balls from 1mm to 500mm, custom available
• Custom special-shaped rubber seals: made to your drawing or sample
• OEM & ODM services available, flexible customization on size, color, hardness, material and shape to meet your unique requirements