Ningbo Zhonggao Rubber & Plastic Manufacturing Co., Ltd. is one of the most reliable manufacturers and suppliers of heat exchanger rubber gaskets in China. The company has world-leading production equipment and strong manufacturing capabilities. Welcome to wholesale custom made heat exchanger rubber gaskets from our factory.
Heat Exchanger Rubber Gaskets
Heat exchanger rubber gaskets are sealing components designed for plate heat exchangers to prevent fluid leakage and cross-contamination under specified temperature, pressure, and cleaning conditions. They are available in different rubber compounds, hardnesses, profiles, attachment methods, thicknesses, and dimensions to match specific heat exchanger plates, sealing configurations, and operating requirements.
Technical Specifications
Rubber Material Selection
|
Rubber Material |
Key Performance |
|
EPDM |
Water, Ozone & Weather Resistance |
|
NBR |
Oil & Fuel Resistance |
|
FKM |
Heat & Chemical Resistance |
|
CR |
Weather & Aging Resistance |
|
Silicone |
Wide Temperature Capability |
Heat Exchanger Rubber Gasket Specifications
|
Parameter |
Specification / Reference |
|
Available Materials |
EPDM, NBR, HNBR, FKM |
|
Operating Temperature |
EPDM: -50 to +150°C; NBR: -40 to +120°C; HNBR: typically -40 to +150°C*; FKM: -20 to +200°C |
|
Hardness |
Shore A 40–90* |
|
Tensile Strength |
≥7 MPa* |
|
Elongation at Break |
≥200%* |
|
Compression Set |
≤20–30% @ 70°C × 22h* |
|
Gasket Thickness |
0.5–50 mm* |
|
Typical Pressure Reference |
Up to 2.5–10 MPa depending on material, gasket design, and operating conditions* |
|
Manufacturing Processes |
Compression molding, transfer molding, injection molding, die cutting |
|
Mold Accuracy |
Up to ±0.01 mm |
|
Compression Set |
≤20–30% (70°C × 22 h)* |
|
ID |
10–500 mm* |
|
OD |
15–550 mm* |
|
Gasket Thickness |
0.5–50 mm* |
|
Recommended Compression |
15–30% |
|
EPDM Volume Resistivity |
≥10¹⁵ Ω·cm* |
|
Mold Accuracy |
Up to ±0.01 mm* |
* Reference values are typical industry ranges or material-level references. Actual gasket performance depends on the rubber compound, hardness, gasket profile, plate design, compression, process fluid, temperature, pressure, and cleaning conditions. Final specifications should be confirmed against the approved drawing and application requirements.
Custom
Heat exchanger rubber gaskets can be customized according to your equipment model, gasket drawing or sample, sealing profile, dimensions, rubber compound, attachment method, and operating conditions.
We can provide:
• EPDM
• NBR
• HNBR
• FKM
Material selection can be reviewed against the actual process fluid, concentration, temperature, and cleaning conditions before production.
Material compound and hardness can be selected according to:
• Temperature requirements
• Process fluid and concentration
• Chemical compatibility
• Operating pressure
• Static sealing conditions
• Certification requirements
The recommended rubber compound can be evaluated based on the actual heat exchanger fluid and operating environment.
We can manufacture heat exchanger gaskets to match your plate and sealing configuration, including:
• Custom length, width, and thickness
• Cross-section and gasket profile
• Port dimensions
• Hole positions
• Sealing grooves and cutouts
• Specified dimensional tolerances
You can provide:
• CAD or technical drawings
• Gasket dimensions and tolerances
• Heat exchanger plate information
• Original gasket samples
These details can be used to develop the gasket for accurate plate and groove fit.
Heat exchanger gaskets can be produced to match different attachment designs, including:
• Clip-on / clip-in
• Glue-in
• Loc-in
• Other customer-specific designs
The attachment method can be matched according to:
• Plate groove design
• Existing gasket construction
• Heat exchanger model
• Customer drawings
This helps ensure the gasket is properly positioned during assembly and remains compatible with the original plate design.
Gasket specifications can be reviewed according to your actual working conditions, including:
• Process fluid and concentration
• Normal and maximum temperature
• Operating pressure
• CIP and cleaning conditions
• Steam exposure
• Thermal cycling
• Pressure cycling
These operating conditions help determine the suitable rubber compound, hardness, gasket profile, and sealing configuration for the application.
We support custom gaskets for:
• OEM part numbers
• Original gasket replacement
• Heat exchanger models
• Plate models
• Replacement maintenance requirements
• New equipment
• Customer-designed gasket configurations
You can provide an existing gasket, plate model, drawing, or part number for specification review and gasket development. Samples can be produced for approval before mass production to support fit verification and repeat orders.
Applications
The right heat exchanger rubber gaskets are not selected based on size or material alone. Actual gasket material and design requirements depend on the heat exchanger model, plate configuration, process fluid, temperature, pressure, and cleaning conditions.
- HVAC & Refrigeration
- Food & Beverage Processing
- Industrial Process Equipment
- Chemical Processing
Heat Exchanger Gasket Manufacturing
Zhonggao operates a 5,000 m² factory with 40+ technicians, 20,000+ molds, 20 production lines, and monthly production capacity of up to 10 million rubber parts, supporting custom gasket development from prototype to mass production.
Sample Approval Process:
Drawing → Sample → Customer Approval → Mass Production
Quality Control for Consistent Heat Exchanger Gaskets
Raw Material & Compound Control
Rubber materials are checked against the approved compound, material specification, hardness requirements, and applicable raw-material batch records before production to verify material conformity.
Dimensional Inspection
Critical gasket dimensions, profiles, thickness, port areas, hole positions, and other specified features are inspected against the approved drawing, specifications, and applicable tolerances.
Physical & Performance Testing
Applicable hardness, tensile strength, elongation, compression-set, and other physical or performance properties are tested according to the approved product requirements and relevant test methods.
Batch Traceability
Material batches, production records, inspection results, and shipment records are maintained as applicable to support traceability from incoming material through finished gasket delivery and repeat orders.
Drawing & Specification Revision Control
Once a gasket specification is approved, production follows the approved drawing, material specification, revision requirements, and applicable inspection criteria to maintain consistency across repeat production.
Finished Product Inspection
Finished heat exchanger gaskets are checked against approved specifications before packing, including dimensions, profile, appearance, and other customer-defined requirements that may affect installation or sealing.
Zhonggao's quality system includes 6 dedicated QC inspectors, laboratory testing equipment, and raw-material and finished-product inspection, with IATF 16949, ISO 9001, ISO 14001, and ISO 45001 certifications supporting controlled production and consistent repeat orders.
B2B Ordering & Supply Support
Heat exchanger rubber gasket orders are supported from drawing or sample review through sampling, mass production, inspection, shipment, and repeat production.
- Flexible MOQ: discussed according to gasket size, design complexity, tooling, production process, and order quantity.
- Sample & Prototype Support: 3–15 days for fit and specification approval before mass production.
- Mass Production: 10–30 days after order specifications are confirmed.
- Repeat Orders: Approved drawings, material specifications, and production records support consistent quality and specifications across repeat orders.
FAQ
Q: How Do I Know If a Heat Exchanger Gasket Needs to Be Replaced?
A: Common replacement indicators include visible cracking, hardening, swelling, permanent deformation, leakage, gasket displacement, or reduced sealing performance during operation or maintenance.
Q: How Long Do Heat Exchanger Rubber Gaskets Typically Last?
A: Gasket service life depends on the rubber compound, process fluid, temperature, pressure, cleaning conditions, and operating cycles, so replacement intervals should be determined from actual operating conditions and gasket condition rather than a fixed service period.
Q: Can Heat Exchanger Gaskets Be Replaced Without Changing the Plates?
A: Yes. Replacement gaskets can generally be supplied for existing heat exchanger plates when the gasket profile, dimensions, attachment method, and plate configuration can be accurately matched.
Q: What Causes Heat Exchanger Gaskets to Fail Prematurely?
A: Premature gasket failure can result from unsuitable material selection, excessive temperature or pressure, chemical attack, incorrect installation, over-compression, thermal cycling, or repeated pressure fluctuations.
Q: How Should Heat Exchanger Gaskets Be Stored Before Installation?
A: Gaskets should generally be stored in a clean, dry environment away from direct sunlight, ozone sources, excessive heat, oils, chemicals, and mechanical deformation to help preserve their sealing properties before installation.
Q: Can You Supply Gaskets for Discontinued or Older Heat Exchanger Models?
A: Replacement gaskets can be evaluated for older or discontinued equipment using an original gasket, plate information, drawing, dimensions, or other available technical references to establish the required specification.
Q: What Information Should I Provide When Requesting a Heat Exchanger Gasket Quote?
A: Useful information includes the heat exchanger model or plate model, original gasket or drawing, dimensions, rubber material, process fluid, operating conditions, quantity, and any applicable technical or packaging requirements.
Q: What Shipping Methods Are Available for Heat Exchanger Rubber Gaskets?
A: Heat exchanger rubber gaskets can be shipped by express, air freight, sea freight, or other suitable transportation methods, depending on order quantity, delivery requirements, destination, and shipment urgency.
Custom Heat Exchanger Rubber Gaskets for Your Project
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