Ningbo Zhonggao Rubber & Plastic Manufacturing Co., Ltd. is one of the most reliable manufacturers and suppliers of rubber sheet gaskets in China. The company has world-leading production equipment and strong manufacturing capabilities. Welcome to wholesale custom made rubber sheet gaskets from our factory.
Rubber Sheet Gaskets for Application-Specific Sealing
Rubber Sheet Gaskets provide flexible sealing between mating surfaces to help prevent leakage in piping, machinery, equipment, and industrial systems. Custom materials, dimensions, thicknesses, hardness, holes, cutouts, and profiles are available according to your application, drawing, or sample.
Technical Specifications
Rubber Material Selection
|
Material |
Operating Temperature |
Key Resistance |
|
EPDM |
-50°C to +150°C |
Water, Steam, Weather & Ozone |
|
NBR |
-40°C to +120°C |
Oil, Fuel & Hydraulic Media |
|
FKM |
-20°C to +200°C |
Oil, Fuel & Chemicals |
|
CR |
-40°C to +120°C |
Weather & Environmental Exposure |
|
Silicone |
-70°C to +220°C |
Wide-Temperature Flexibility |
Rubber Sheet Gasket Specifications
|
Parameter |
Specifications |
|
Gasket Type |
Flat Gasket, Full-Face, Ring-Type, Custom Profile |
|
Rubber Material |
EPDM, NBR, FKM, CR, Silicone |
|
Hardness |
40–90 Shore A, depending on material and application |
|
Operating Temperature |
EPDM: -50°C to +150°C; NBR: -40°C to +120°C; FKM: -20°C to +200°C; CR: -40°C to +120°C; Silicone: -70°C to +220°C |
|
Gasket Thickness |
0.5–10.0 mm* |
|
Inside Diameter (ID) |
15–600 mm* |
|
Outside Diameter (OD) |
30–700 mm* |
|
Bolt Hole Diameter |
10–40 mm* |
|
Bolt Hole Quantity |
4–24 holes* |
|
Mold Accuracy |
Within ±0.01 mm |
*Standard reference values. Actual specifications depend on the rubber material, specific compound, gasket design, dimensions, manufacturing process, flange conditions, and operating requirements.
Custom Rubber Sheet Gaskets
Rubber sheet gaskets can be customized according to your sealing interface, material requirements, and application conditions.
We can produce:
• Custom ID, OD, length, width, and thickness
• Ring, square, rectangular, oval, washer, and flange gaskets
• Irregular shapes, holes, slots, grooves, and cutouts
Material and hardness can be selected according to:
• Sealing media and fluid contact
• Operating temperature and pressure
• Required compression and conformability
• Static or dynamic sealing conditions
Available materials include EPDM, NBR, FKM, CR, and Silicone.
Dimensional tolerances can be specified for:
• Overall dimensions and thickness
• ID, OD, and sealing areas
• Hole size and position
• Profiles, cutouts, and other critical features
We can provide:
• Standard rubber sheet construction
• Fabric-reinforced rubber sheet options
• Reinforcement matched to mechanical and dimensional requirements
You can provide:
• CAD or technical drawings
• Dimensions and tolerances
• Material and hardness requirements
• Existing gasket samples
We can use these details to evaluate and develop the gasket according to your requirements.
Applications
Rubber sheet gaskets are available for suitable sealing applications across industrial equipment and fluid-handling systems.
• Pumps & Valves
• Piping Systems
• Industrial Machinery
• HVAC Equipment
• Automotive Systems
• Water & Wastewater Equipment
Manufacturing Capabilities & Methods
Supported by 20 production lines, 20,000+ molds, 40+ experienced technicians, and a monthly production capacity of up to 10 million rubber parts, we support prototype development, short-term production, and large-volume rubber gasket orders.
Manufacturing Methods
Die Cutting
Suitable for:
• Flat rubber sheet gaskets
• Repeated profiles and custom shapes
• Medium- to high-volume production
• Consistent dimensions and edge profiles
CNC Cutting
Suitable for:
• Prototypes and sample development
• Low-volume production
• Complex or irregular gasket profiles
• Designs requiring flexible modifications
Punching & Precision Cutting
Our production equipment supports precision cutting and punching for custom gasket dimensions, holes, slots, and profiles, with the process selected according to material, thickness, geometry, and order volume.
Tooling & Mold Development
We support:
• Custom mold design and manufacturing
• Sample- or drawing-based mold development
• OEM production with customer-provided molds
• Tooling for repeat and high-volume production
Zhonggao reports 20,000+ molds and mold-making capability based on customer samples or design drawings.
Prototype to Mass Production
We support:
• Prototype and sample development
• Short-term production
• Mass production
• Repeat-order manufacturing
Sample production is typically 3–15 days, while confirmed production orders generally require 10–30 days depending on project requirements and production arrangements.
Sample Approval & First Article Process
Drawing → Tooling → Prototype → Sample → Inspection → Approval → Mass Production
Quality Control
Raw Material Inspection
Rubber materials are checked against approved material and hardness requirements before production.
Dimensional Inspection
ID, OD, thickness, hole dimensions, profiles, and other critical dimensions are inspected against the approved drawing and tolerances.
Physical & Performance Testing
Testing can include hardness, tensile strength, elongation, compression set, aging, and other specified properties according to material and application requirements.
Visual & Workmanship Inspection
Finished gaskets are checked for cracks, voids, contamination, surface defects, and unacceptable cutting or edge conditions.
Batch Traceability
Material and production information can be maintained by batch or lot to support quality tracking and repeat orders.
Production Consistency
Approved drawings, material specifications, tooling, and inspection requirements provide controlled references for repeat production.
Zhonggao's quality system includes dedicated QC personnel, laboratory testing equipment, raw-material inspection, and finished-product inspection, with IATF 16949, ISO 9001, ISO 14001, and ISO 45001 certifications.
B2B Order Support
The supply process can be arranged around the buyer's approved specifications, production quantity, delivery schedule, packaging requirements, and repeat-order needs.
- MOQ Discussion
- Production Scheduling
- Lead Time Confirmation
- Custom Packaging
- Product Labeling
- International Shipment
- Repeat-Order Support
FAQ
Q: What Are Rubber Sheet Gaskets Used For?
A: Rubber Sheet Gaskets are used to create a flexible sealing interface between mating surfaces in piping, pumps, valves, machinery, HVAC equipment, automotive systems, and water-handling equipment.
Q: Can Rubber Sheet Gaskets Be Used for Flange Connections?
A: Yes. Rubber Sheet Gaskets can be manufactured for compatible flange connections in different sizes, shapes, hole patterns, and thicknesses according to the flange design and operating conditions.
Q: What Is the Difference Between a Rubber Sheet Gasket and an O-Ring?
A: A Rubber Sheet Gasket is typically cut from rubber sheet material for flat sealing surfaces, while an O-ring uses a circular cross-section for sealing a groove. The suitable design depends on the joint configuration and available sealing space.
Q: Are Rubber Sheet Gaskets Suitable for Static Sealing?
A: Yes. Rubber Sheet Gaskets are commonly used for static sealing between fixed mating surfaces where the selected rubber material, gasket dimensions, compression, and operating conditions are compatible.
Q: How Should Rubber Sheet Gaskets Be Stored Before Installation?
A: Store rubber sheet gaskets in a clean, dry environment away from direct sunlight, ozone sources, excessive heat, and chemicals. Avoid deformation or compression during storage to help maintain the gasket's original dimensions and sealing properties.
Q: What Shipping Methods Are Available for Rubber Sheet Gaskets?
A: Shipping can be arranged by sea, air, express, or other suitable methods according to order quantity, delivery requirements, destination, and shipment schedule.
Request a Custom Rubber Sheet Gasket Quote
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