Rubber Gaskets

Enterprise Introduction

MN Rubber Seal is a direct manufacturer of rubber sealing products and custom-shaped rubber components. Our range includes O-rings, general-purpose seals, oil seals, gaskets, dust wipers, and non-standard parts made to customer drawings or samples.

We serve machinery, construction equipment, hydraulics and pneumatics, automotive components, water conservancy, electromechanical products, and industrial automation. Materials include NBR, silicone, FKM, EPDM, natural rubber, nylon, polymers, and polyurethane, selected according to temperature, fluid, pressure, movement, and wear requirements.

Our factory handles rubber compounding, compression and injection molding, cutting, finishing, and testing. From standard products to custom parts, we focus on stable quality, accurate manufacturing, and reliable delivery. Customers can provide drawings, samples, dimensions, material requirements, or application details for technical consultation, prototyping, and quotation.

Product Advantages

Rubber gaskets provide reliable sealing between mating surfaces to help prevent leakage, dust ingress, air loss and fluid contamination. From standard flat gaskets and thin sealing washers to precision seal rings and custom rubber packing seals, Minai supplies rubber sealing components for general equipment as well as demanding industrial applications.
With options including NBR, EPDM, FKM, silicone, polyurethane and other rubber materials, the sealing solution can be matched to the working medium, temperature, pressure and installation conditions.

Flat Rubber Gaskets

Flat rubber gaskets for static sealing on flanges, pipe fittings, equipment end faces and flat joints. Available in standard and customized sizes for general and precision sealing applications.

Flat Rubber Washers

Ultra-thin rubber washers designed for narrow installation gaps and flat contact surfaces, providing sealing, cushioning, insulation and anti-loosening performance.

Rubber Seal Rings

Elastic ring seals designed for groove-based, static and low-speed dynamic sealing in fluid, hydraulic and pneumatic systems.

Custom & Specialized Rubber Seals

Specialized sealing components for demanding equipment and high-temperature static sealing applications, with material and geometry options for different operating conditions.

Different sealing structures and materials suit different equipment and operating conditions. The following applications show where each rubber gasket type is commonly used.

Rubber Gaskets for Industrial Applications

Rubber Gaskets

Reliable Sealing Solutions for Diverse Industrial Equipment and Applications

Flange & Pipeline Sealing

Rubber sealing components are used at connected interfaces in piping systems to help prevent leakage of water, air, oil and other fluids. Selection depends on the sealing surface, connection structure, medium and operating conditions.

Hydraulic & Pneumatic Systems

Sealing components in hydraulic and pneumatic equipment need to withstand the specified pressure, fluid medium and movement conditions. Material compatibility, sealing geometry and dimensional accuracy are important factors during selection.

Pumps & Valves

Pump and valve assemblies require sealing at multiple connection and interface points. Rubber sealing components can be selected according to the fluid, temperature, pressure and installation structure of the equipment.

Automotive & Industrial Machinery

Rubber sealing components are used in mechanical assemblies where resistance to oils, vibration, wear and environmental exposure may be required. Different geometries and materials can be matched to the specific assembly.

Water, HVAC & Thermal Systems

Water, HVAC and thermal equipment require sealing materials compatible with their operating temperature, fluid and environmental conditions. Material selection is particularly important for water, steam and elevated-temperature applications.

Precision & Automated Equipment

Compact equipment and automated systems may require sealing components with controlled dimensions, tight tolerances or specialized geometries. Custom rubber components can be developed when standard sizes or profiles do not meet the assembly requirements.

Technical Comparison of Rubber Gasket Series

Product Series	Typical Materials	Hardness	Temperature*	Pressure*	Sealing Type	Typical Use
Universal Rubber Gasket	NBR, EPDM, Silicone	60–80 Shore A	-40°C to 120°C; special grades up to 200°C	0–40 bar*	Static	Flanges, pipe fittings, equipment interfaces
Round Flat Rubber Gasket	NBR, EPDM, FKM, Silicone, CR	40–85 Shore A	-50°C to 230°C*	≤10 MPa*	Static flat compression	Flanges, pipe fittings, equipment covers
Flat Rubber Sealing Washer	NBR, EPDM, Silicone, PU	40–90 Shore A	Material dependent	0–30 bar*	Static / low-pressure cushioning	Fasteners, fittings, precision equipment
Seal Ring Rubber	NBR, EPDM, FKM, Silicone, HNBR	Material dependent	Material dependent	Material dependent	Static / low-speed dynamic	Hydraulic & pneumatic systems
Round Rubber Ring	NBR, EPDM, Silicone, PU, polymers	Material dependent	Material dependent	Material dependent	Static / low-speed dynamic	Pumps, valves, machinery
Rubber Packing Seal	EPDM, NBR, Silicone, PU, special polymers, Nylon	40–90 Shore A	-60°C to 220°C*	0–50 bar*	Static / equipment sealing	Pumps, valves, machinery, customized equipment
Red Rubber Seal	Modified red rubber formulation	Material dependent	High-temperature application*	Application dependent	Static	Steam, HVAC, boilers, thermal equipment

*Temperature and pressure values are reference ranges only. Actual performance depends on material formulation, hardness, dimensions, sealing structure and working conditions.

Material	Key Characteristics	Suitable Conditions
NBR	Good oil and fuel resistance; good mechanical performance	Oils, fuels, hydraulic systems and general industrial sealing
EPDM	Good water, weather, ozone and aging resistance	Water, outdoor equipment, HVAC and steam-related applications
Silicone	Wide temperature flexibility; good weather resistance	High/low-temperature applications, appliances and food-contact applications where suitable grade is required
FKM	High oil, fuel and temperature resistance	Demanding industrial environments involving heat, oils or selected chemicals
HNBR	Improved heat, oil, ozone and mechanical resistance compared with standard NBR	Higher-demand sealing applications
Polyurethane (PU)	Good wear resistance and elasticity	Dynamic or wear-prone applications

Why Choose Minai for Rubber Gaskets?

Integrated Rubber Sealing Manufacturing

Hengshui Minai Rubber & Plastic Technology Co., Ltd. integrates R&D, customization, manufacturing, sales and after-sales service for rubber sealing products. The company produces standard seals as well as non-standard and special-shaped components based on customer drawings, samples or application requirements.

Production Capability

Manufacturing Capability
Equipped with rubber compounding, molding, cutting, finishing and testing facilities, we control key processes from materials to finished products.

Customized Rubber Seals:

500+ self-owned molds

15 million pcs/month capacity

3–7 days sampling

7–25 days mass production

Supports small-batch sampling, pilot runs and mass production.

R&D & Customization Capability

Minai's customization capability covers material selection, hardness, dimensions, colors and special-shaped structures. Customers can provide CAD, PDF or STEP drawings, samples or dimensional requirements for development and production.

Customization Workflow

Drawing / Sample

Material Selection

Mold Developmen

Sampling

Testing

Mass Production

Quality & Certifications

Hengshui Minai Rubber & Plastic Technology Co., Ltd.

ISO 9001 Quality Management System

Production processes are managed under ISO 9001, with batch traceability and documented quality control from raw materials to finished products.

Supporting Global OEM & Industrial Supply

Minai has supplied rubber sealing products to customers in 50+ countries, supporting more than 300 cooperative customers across machinery, hydraulics, automotive, water conservancy, electronics and other industrial sectors. The company supports both standard product supply and OEM/ODM projects, from sampling and customization to batch production.

Service Guarantee

Pre-Sales Support

Application consultation, material selection and quotation based on drawings, samples or technical requirements.

Engineering & Sampling

Support for CAD/PDF/STEP drawings, sample copying, non-standard dimensions and special-shaped sealing components. Sampling can be arranged for customized projects.

Production Control

Material, dimensions, molding, trimming and finished-product inspection are controlled throughout the production process, with ISO 9001-based quality management and batch traceability.

Delivery Support

Standard products, small-batch samples, pilot production and mass production are supported according to project requirements.

After-Sales Support

Technical guidance, quality issue response and continued supply support are provided for long-term cooperation.

Need a Rubber Gasket for Your Application?

Whether you need a standard rubber gasket or a custom sealing component, Minai can help match the material, dimensions and sealing structure to your working conditions.

Send us your drawing / sample / dimensions / application requirements.

Our engineering team can review your requirements, recommend a suitable material and sealing structure, and provide a customized quotation.

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Send Inquiry Now

Hengshui Minai Rubber & Plastic Technology Co., Ltd. is one of the most professional rubber gaskets manufacturers and suppliers in China, featured by quality products and good price. If you're going to buy advanced rubber gaskets made in China, welcome to get quotation from our factory. Welcome to contact us for customized service and OEM/ODM service.