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    Weizhong Company adheres to the business philosophy of "Quality First, Customer Supreme, Honest and Trustworthy, and Active Innovation".

Elastic rubber seals
We are a professional elastomer seal manufacturer dedicated to providing customers with high-performance, high-precision, customized rubber sealing solutions. Our products include O-rings, X-rings, gaskets, oil seals, and door and window seals, among other types. They are widely used in automotive, aerospace, hydraulics, medical equipment, and industrial machinery. Leveraging our advanced material knowledge and proven process technology, we ensure that each seal performs exceptionally well in demanding environments.
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Elastic Rubber Seals, Custom Gaskets & O-Rings for Industrial Machinery and Equipment


Product Overview

We are a professional elastomer seal manufacturer dedicated to providing customers with high-performance, high-precision, customized rubber sealing solutions. Our products include O-rings, X-rings, gaskets, oil seals, and door and window seals, among other types. They are widely used in automotive, aerospace, hydraulics, medical equipment, and industrial machinery. Leveraging our advanced material knowledge and proven process technology, we ensure that each seal performs exceptionally well in demanding environments.


Technical Specifications

Category

Parameter

Details / Typical Values

Material Types

Primary Elastomers

NBR (Nitrile), FKM (Fluoroelastomer/Viton), VMQ (Silicone), EPDM, CR (Neoprene), AU/EU (Polyurethane)


Special Formulations

FDA, USP Class VI, UL94, ROHS, REACH Compliant grades available

Physical Properties

Hardness (Shore A)

30° to 90° (Standard Range), Customizable outside this range


Tensile Strength

5 MPa to 25 MPa (Varies significantly by material; e.g., FKM & Polyurethane are high-strength)


Elongation at Break

150% to 600% (Standard Range)


Compression Set (22 hrs @ 70°C)

10% to 40% (Excellent recovery; varies by material and formula)


Tear Strength

10 kN/m to 45 kN/m (Die B or C)

Thermal & Environmental

Standard Service Temperature

-60°C to +230°C (Material Dependent: Silicone/FKM: Wide Range, NBR: -40°C to +120°C)


Fluid Resistance

NBR: Oils, Fuels; FKM: Broad Chemicals, Oils; EPDM: Steam, Water; VMQ: Hot Air


Weather & Ozone Resistance

Excellent for EPDM, FKM, Silicone; Good for NBR (with additives)

Dimensions & Standards

Standard Types

O-Rings (AS568, ISO 3601), X-Rings, Gaskets, Weather-strips, Custom Profiles


Cross-Section / Wall Thickness

0.5 mm to 20 mm (Customizable based on design)


Tolerances

Standard to Precision Grade available (per ISO 3302, AS568)


Cord / Strip Length

Standard 50 meters/roll or 100 meters/roll, Custom lengths available

Performance & Compliance

Industry Standards

ISO 9001, IATF 16949 Quality Management


Certifications

FDA 21 CFR 177.2600, USP Class VI, UL 94 HB, ROHS 3 (Select Grades)


Color Availability

Black (Standard), Custom colors available (Red, Blue, White, etc.)


Key Product Highlights

· Excellent Sealing Performance: Providing stable compression set, ensuring a tight seal even after long-term use, effectively preventing leaks. Precise dimensional control and smooth flash finish ensure easy installation and reliable sealing.

· Wide Range of Materials and Media Resistance

Nitrile (NBR): Excellent oil resistance, suitable for petroleum-based hydraulic fluids and fuels.

Fluorocarbon (FKM/Viton): High-temperature and chemical resistance, suitable for extreme environments.

Silicone (VMQ): Broad temperature resistance, non-toxic and odorless, suitable for food, medical, and high-temperature applications.

Ethylene Propylene Diene Monomer (EPDM):    Excellent weather resistance, ozone resistance, and steam resistance.

Chloroprene Rubber (CR): Excellent weather resistance and flame retardancy, suitable for outdoor equipment.

· Exquisite Craftsmanship and Customization Capabilities

Proven compression molding, injection molding, and extrusion processes enable the manufacture of everything from standard parts to complex, custom-shaped parts.

Strong custom development capabilities allow us to provide one-stop services, from material selection and mold design to product manufacturing, tailored to your operating conditions (pressure, temperature, media) and drawings.

· Strict Quality Control

We conduct quality inspections throughout the entire process, from raw material receipt to finished product shipment.

Our products comply with quality management system standards such as ISO 9001 and IATF 16949, and we offer relevant material certifications (such as UL, FDA, and ROHS).


Why Choose Us?

1. Team of Technical Experts: We not only sell products, but also provide technical selection support based on in-depth materials science to help you solve complex sealing challenges.

2. Fast Response and Delivery: Our flexible supply chain and production planning ensure fast prototyping and stable delivery, helping you shorten project cycles.

3. Competitive Pricing: Large-scale production and meticulous management ensure we provide high-quality products at competitive prices.

4.Global Service Experience: Our products have been exported to numerous countries and regions worldwide, and we are deeply familiar with the standards and requirements of various markets.


Main Applications

· Automotive: Seals for engines, transmissions, fuel systems, and brake systems.

Hydraulics and Pneumatics: Seals for hydraulic cylinders, pistons, valves, and fittings.

· Aerospace: Precision seals for fuel systems, oil systems, and air management systems.

· Medical Devices: Sterile and biocompatible seals for infusion pumps, ventilators, and diagnostic equipment.

· Food and Beverage: Seals for FDA-compliant delivery pipelines and filling equipment.

· Electronic and Electrical: Thermal and environmental seals for heat sinks and connectors.

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