HVAC Valve Core
Product Overview
Our HVAC Valve Core is designed for refrigerant service systems used in air conditioning and heat pump equipment. Its metal body and rubber sealing component work together to support secure sealing at the valve interface and help prevent refrigerant leakage.
Available for OEM applications, the valve core can be specified according to the required dimensions, interface design, and operating conditions.
Product Structure
Metal Body: Houses the valve core components and provides the threaded mounting interface.
Valve Pin: Opens the valve when depressed to allow refrigerant flow.
Return Spring: Returns the valve pin to its closed position when released.
Rubber Sealing Element: Helps prevent refrigerant leakage when the valve is closed.
Sealing Materials and Technical Specifications
We offer CR, EPDM, NBR, HNBR, and FKM elastomer options for HVAC valve core applications.
|
Specification |
Details |
|
CR Temperature Range |
-40°C to +120°C |
|
EPDM Temperature Range |
-45°C to +150°C |
|
NBR Temperature Range |
-40°C to +70°C |
|
HNBR / FKM Temperature Range |
Confirmed according to the selected compound |
|
Rubber Hardness |
Specified by material grade and application requirements |
|
Dimensional Tolerance |
Defined by the approved product drawing |
|
Working Pressure |
Confirmed for the specific valve core design |
Refrigerant Compatibility
NBR, HNBR, and FKM may be considered for applications involving R-22, R-134a, and R-410A. Compatibility depends on the specific elastomer compound and lubricant.
Confirm material compatibility with the intended refrigerant and lubricant before finalizing material selection.
Compression Set and Sealing Performance
Compression set measures the permanent deformation of rubber after prolonged compression. Excessive compression set can reduce sealing contact and increase the risk of leakage over time.
Performance Evaluation: Assess the rubber's ability to recover after prolonged compression.
Operating Conditions: Consider operating temperature and long-term compression requirements.
Material Selection: Evaluate CR, EPDM, NBR, HNBR, and FKM compounds according to the intended application.
Testing: Assess compression set under specified temperature, compression level, and test duration.
OEM Customization and Product Selection
We provide OEM HVAC valve core solutions based on customer drawings, samples, or technical specifications. Product selection and customization are based on the following requirements:
Dimensions and Interface: Core dimensions, thread specifications, mating port dimensions, and connection requirements.
Sealing Material: CR, EPDM, NBR, HNBR, or FKM, selected according to refrigerant compatibility and operating conditions.
Operating Conditions: Refrigerant type, lubricant, operating temperature, and working pressure.
Sample Approval: Prototype sampling and dimensional verification before mass production.
Production and Supply: Manufacturing according to approved drawings and material specifications, with repeat-order support and customized packaging.
To evaluate your requirements, please share your product drawing or sample, refrigerant and lubricant type, operating temperature, and working pressure. Our team can review the specifications and recommend a suitable valve core configuration.
Quality Control and Batch Traceability
Material Inspection: Rubber and metal component inspection.
Dimensional Inspection: Critical dimensions, threads, and interface fit.
Visual Inspection: Cracks, burrs, and surface defects.
Leakage Testing: Sealing performance verification.
Functional Testing: Valve pin movement and return action.
Batch Traceability: Material batches, production records, and inspection results.
Final Inspection: Product specifications, quantity, and packaging.
FAQ
Q: Can an HVAC valve core be reused after removal?
A: No, install a new valve core after removal because the existing seal may not reseal reliably in a different position.
Q: What can cause a valve core to leak after installation?
A: Dirt on the valve seat, damaged sealing elements, incorrect installation, or overtightening can cause refrigerant leakage.
Q: Is a service port cap necessary after installing a valve core?
A: Yes, use a cap with an intact gasket to provide secondary sealing and protect the service port from contamination.
Q: Can a valve core be replaced while the refrigeration system is pressurized?
A: Yes, but only with a valve core removal tool rated for pressurized service and operated by qualified technicians following the applicable safety procedures.
Q: How can buyers confirm that a replacement valve core fits an existing service port?
A: Match the original part number or verify the thread type, interface dimensions, core design, and pin configuration before ordering.
Q: What should be checked after replacing a valve core?
A: Verify correct installation and pin height where applicable, then perform a leak test using a method suitable for the refrigerant and the equipment manufacturer's requirements.
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