About Haining Chaoyue Seals Co., Ltd.
20+ Years of Industry Experience in Precision Rubber Sealing Solutions
Haining Chaoyue Seals Co., Ltd. is a manufacturer specializing in the development and production of rubber sealing products, protective rubber components, and customized sealing parts.
With more than 20 years of experience in the rubber sealing industry, we work with customers requiring both standard sealing components and application-specific rubber parts. Our product range covers O-rings, flange gaskets, rubber buffers, rubber stoppers, VA/VS water seals, protective sleeves, and various customized rubber components.
Our manufacturing capabilities support projects from initial product requirements and drawing review through mold development, rubber formulation selection, production, inspection, and mass delivery.
Rather than focusing only on standard catalog products, we also provide customized rubber sealing solutions based on customer drawings, dimensions, operating conditions, material requirements, and application environments.
What We Manufacture
Standard Rubber Sealing Products
Our standard product range includes:
Different products can be manufactured according to specified dimensions, material requirements, hardness, sealing structure, and application conditions.
For customers who already have established specifications, drawings, samples, or part numbers, we can manufacture components according to the supplied technical requirements.
Custom Rubber Seals and Components
Many sealing applications cannot be solved with standard dimensions or conventional sealing profiles. Different equipment structures, installation methods, temperatures, pressures, media, and movement conditions can require a customized rubber component.
Chaoyue Seals supports customized rubber parts based on:
The development process can include drawing evaluation, material selection, mold design, sample production, dimensional inspection, and subsequent mass production.
This makes our manufacturing service suitable for OEM and replacement-part requirements where dimensional consistency and application compatibility are important.
Rubber Material Selection
Material selection directly affects the service life and sealing performance of a rubber component. Different rubber compounds have different resistance to temperature, oils, chemicals, weathering, compression, and other operating conditions.
We work with a range of elastomer materials, including:
| Material | Typical Characteristics | Common Considerations |
|---|---|---|
| NBR | Oil and fuel resistance | Hydraulic and pneumatic applications |
| EPDM | Weather, ozone and water resistance | Water systems and outdoor applications |
| FKM | High-temperature and chemical resistance | Oils, fuels and demanding industrial environments |
| HNBR | Improved mechanical and temperature resistance | Automotive and industrial sealing |
| Silicone | Wide temperature range and flexibility | Food, medical and general sealing applications |
| FVMQ | Fuel and chemical resistance | Aerospace and specialized applications |
| FFKM | High chemical and temperature resistance | Semiconductor and demanding chemical environments |
| FEPM | Chemical and heat resistance | Specialized industrial applications |
The appropriate compound depends on the actual working environment rather than simply the product name. When reviewing a customized sealing requirement, factors such as temperature, pressure, contact medium, movement, compression, installation method, and expected service conditions should be considered together.
Manufacturing and Production Capability
Our production process is organized around the complete manufacturing cycle of rubber sealing components.
This integrated process allows technical requirements to be reviewed before mass production and helps reduce dimensional or material-related problems during the manufacturing stage.
Our production workshop is equipped for the molding and processing of different rubber components, while our mold resources support both standard and customized product development.
In-House Mold Resources
Mold development is an important part of customized rubber seal manufacturing.
For non-standard rubber components, mold geometry directly affects dimensions, parting lines, flash, deformation, and the consistency of the finished component.
Chaoyue Seals maintains a dedicated mold warehouse and manages molds used for customized rubber products. This allows production requirements to be coordinated with mold resources throughout the product development and manufacturing process.
For repeat orders, mold information can also be managed as part of the production process to support subsequent manufacturing requirements.
Quality Control
Rubber sealing components are often installed inside equipment and may not be visible after assembly. Therefore, dimensional accuracy, material consistency, and production control are important factors when selecting a sealing component manufacturer.
Our quality control process focuses on:
- Product dimensions
- Rubber material specifications
- Hardness requirements
- Visual appearance
- Surface defects
- Flash and molding condition
- Product consistency
- Customer-specific inspection requirements
For customized products, inspection criteria can be established according to the customer's drawings, technical specifications, samples, or agreed quality requirements.
The specific inspection items and acceptance criteria can be defined according to the product structure and application.
From Prototype to Mass Production
Our manufacturing service is designed to support different stages of product development.
Prototype and Sample Production
For new rubber components, customers can provide drawings, samples, or technical specifications for initial evaluation. Sample production can then be arranged after the product structure and manufacturing requirements are confirmed.
Small-Batch Production
Small-batch production can be used for product validation, equipment testing, or initial market requirements before moving into larger production volumes.
Mass Production
Once product specifications, materials, molds, and inspection requirements have been established, the same manufacturing process can be applied to recurring production orders.
This production structure is suitable for OEM customers, equipment manufacturers, distributors, engineering companies, and industrial component buyers.
Custom Rubber Sealing Across Major Sectors
High-performance custom rubber sealing solutions by Chaoyue for demanding industrial applications.
New energy
High-integrity sealing solutions engineered for EV battery enclosures, hydrogen fuel cells, and wind turbines, offering superior flame retardancy, IP68 ingress protection, and thermal runaway containment.
Chemical industry
Ultimate chemical-resistant FFKM and PTFE seals designed to withstand aggressive acids, alkalis, and solvents, ensuring leak-free performance in toxic and hazardous media processing.
Transportation
Fire-retardant, low-smoke, and anti-vibration sealing profiles for high-speed rail and transit, compliant with EN 45545-2 standards to ensure passenger safety and long-term durability.
Automobile
Precision-engineered powertrain, FKM oil seals, and engine gaskets providing exceptional oil resistance, low compression set, and long-lasting mechanical endurance under high heat.
Electric power
Gas-tight SF6 switchgear seals and high-voltage transformer gaskets featuring zero-permeability and superior electrical insulation for power grid stability and reliability.
Communications
Rugged IP67/IP68 weather-proof and conductive EMI shielding rubber seals designed for outdoor 5G base stations, optical enclosures, and sensitive electronic hardware.
Aerospace
Mission-critical FVMQ and high-temp polymer seals built for extreme temperature swings, jet fuel immersion, and high-altitude pressure differential challenges.
Oil
Heavy-duty NORSOK M-710 compliant seals engineered to resist Rapid Gas Decompression (RGD), sour gas (H2S), and ultra-high pressure downhole conditions.
Construction
High-abrasion-resistant polyurethane (PU) piston and rod seals tailored for heavy-duty hydraulic cylinders subjected to impulse pressures, mud, and dust contamination.
Food industry
FDA and EC 1935/2004 compliant food-grade silicone and EPDM gaskets designed for hygienic CIP/SIP (Clean-In-Place) sterilization without media contamination.
Appliances
Eco-friendly RoHS/REACH compliant rubber components offering low noise, superior moisture sealing, and long service life for consumer home appliances.
Medical industries
High-purity, USP Class VI certified biocompatible LSR (Liquid Silicone Rubber) micro-seals engineered for precise, sterile fluid control in medical devices.
Why Work with Chaoyue Seals?
20+ Years of Manufacturing Experience
More than two decades of experience in rubber sealing products provides practical knowledge across standard and customized rubber components.
Standard and Custom Products
We manufacture both commonly specified sealing products and non-standard rubber components based on customer drawings, samples, and technical requirements.
Multiple Rubber Materials
Our material range includes NBR, EPDM, FKM, HNBR, Silicone, FVMQ, FFKM, FEPM, and other rubber compounds according to application requirements.
Mold and Production Integration
Mold resources, product development, and production are coordinated within the manufacturing process for customized rubber components.
OEM and ODM Support
Customers can provide drawings, samples, dimensions, or application requirements for customized rubber seal development.
Technical Communication
Our team can review product dimensions, material requirements, application conditions, and manufacturing requirements before production.
Our Manufacturing Approach
We believe that selecting a rubber seal should start with the actual application rather than simply choosing a material or product name.
For each customized sealing component, important parameters may include:
These factors determine whether a particular rubber compound and sealing structure are appropriate for the application.
Our role is to convert these requirements into manufacturable rubber components while maintaining the dimensional and material specifications agreed with the customer.
Working with Global B2B Customers
We work with customers requiring rubber sealing products for equipment manufacturing, industrial components, replacement parts, engineering projects, and customized OEM applications.
Whether you need a standard O-ring or a non-standard rubber component developed from an engineering drawing, our team can support the process from product specification review to production.
For new projects, customers can provide:
The more complete the technical information, the easier it is to evaluate the appropriate manufacturing process and product requirements.
Our Factory
Our manufacturing facilities include production workshops and dedicated mold storage resources supporting the development and production of rubber sealing components.
The production environment is organized to support the different stages of rubber product manufacturing, including mold preparation, molding, product processing, inspection, and packaging.
Our Certifications
Talk to Our Rubber Seal Manufacturing Team
If you are looking for a rubber seals manufacturer, custom rubber seal supplier, or OEM rubber components manufacturer, send us your drawing, sample, dimensions, or application requirements.
Our team can review the product structure, material requirements, and manufacturing conditions and provide feedback for your project.