Charging Valve, Capillary & Wave Tube Supply from Ningguo Kingcool
As a Air-Conditioner Parts-Charging Valve & Capillary & Wave Tube Manufacturers, we match product configuration to the application, operating limits, interfaces and acceptance criteria defined for each project.
Ningguo Kingcool Import and Export Co., Ltd supplies Charging Valve & Capillary & Wave Tube as part of our air-conditioner parts range, alongside compressors, control components, motors and refrigeration accessories. We combine manufacturing of metalized polypropylene film capacitors with sourcing and supply of HVAC and appliance parts, giving project teams a single point for split-system, window, commercial refrigeration and service applications.
Our range is built for wholesalers, OEM assembly lines, maintenance contractors and distributors who need consistent fit, stable refrigerant flow and repeatable brazing quality across production batches. We work from the working pressure, refrigerant type, tube diameter and assembly method of each project to confirm the correct configuration before quotation.
What We Supply in This Category
This category covers the small but critical components that control refrigerant charging and pressure drop in air-conditioning and refrigeration circuits. Each item is selected by connection size, material and the circuit position it serves.
- Charging valves — service and process ports for evacuating and charging split systems, packaged units and condensing units.
- Charging hoses — flexible connection lines used with manifolds and charging equipment during installation and service.
- Capillary tubes — copper restrictor tubes that meter refrigerant between condenser and evaporator in small refrigeration systems.
- Wave tubes / bellows elements — corrugated metal tubes used for pressure and temperature sensing in HVAC control and monitoring.
- Connecting copper pipes — cut-to-length copper tube assemblies for air-conditioner piping and capillary connections.
Application Fit Across Air-Conditioning and Refrigeration
Charging valves and capillary tubes sit at the boundary between installation quality and system performance. A capillary tube sets the refrigerant mass flow for a given pressure difference, so its internal diameter, length and cleanliness directly affect evaporating temperature and compressor load. Charging valves must hold pressure after service and resist vibration and thermal cycling at the service port.
Wave tubes and bellows elements convert pressure or temperature change into measurable movement. In HVAC equipment they appear in pressure switches, expansion valve sensing elements and monitoring instruments. We match the corrugation profile, wall thickness and end connection to the sensing range and medium of the application.
Product Range and Application Matching
| Product | Typical Circuit Position | Key Selection Data | Common Applications |
|---|---|---|---|
| Charging valve | Suction or liquid line service port | Connection thread, valve core type, refrigerant compatibility | Split A/C, condensing units, packaged systems |
| Charging hose | Service connection to manifold or vacuum pump | Working pressure, hose length, end fitting, burst rating | Installation, evacuation, field service |
| Capillary tube | Between condenser and evaporator | Inner diameter, length, copper grade, end form | Refrigerators, freezers, small A/C units |
| Wave tube / bellows | Pressure or temperature sensing element | Corrugation count, material, stroke, connection interface | Pressure switches, expansion valves, instruments |
| Connecting copper pipe | Interconnecting pipework and capillary assemblies | Outer diameter, wall thickness, temper, cut length | A/C installation, repair, OEM sub-assembly |
Materials, Dimensions and Critical Specifications
Copper remains the standard material for capillary and connecting tubes because it combines ductility, thermal conductivity and reliable brazing. Wave tubes and bellows use copper, brass, stainless steel or alloy depending on the medium and required corrosion resistance. We confirm the following data before releasing a quotation:
- Refrigerant type (R32, R410A, R134a, R600a and similar) and system working pressure.
- Tube outer diameter, inner diameter, wall thickness and cut length tolerance.
- End form: flare, solder cup, spin weld, threaded port or plain cut.
- Surface condition and cleanliness requirements for capillary bore.
- Valve core material, thread standard and cap style for charging valves.
Configuration Options and Customization
We support both catalogue supply and project-specific configuration. For capillary tubes, length and bore can be adjusted to match the required pressure drop and cooling capacity. For charging valves, we can supply different thread sizes, valve core types and protective caps to suit the service equipment used in your market.
Wave tube and bellows elements can be configured by corrugation geometry, effective length, end fitting and material grade. When a customer supplies a drawing or sample, we confirm the critical dimensions and propose the closest production route before order confirmation.
Quality Control and Acceptance
Our capacitor production uses high-precision slitting and winding equipment with in-process testing, and the same discipline of dimensional and functional checking applies to the parts we source and supply. For this category, acceptance typically covers:
- Dimensional inspection of bore, length, thread and end form.
- Visual inspection for burrs, oxidation, dents and blocked capillary bore.
- Pressure or leak testing of charging valves and hose assemblies where specified.
- Material verification for copper grade and surface finish.
- Sampling plan agreed with the customer for batch release.
Installation, Maintenance and Serviceability
Capillary tubes are brazed or soldered into the circuit and require a clean, dry bore to avoid restriction. Charging valves should be capped after service to protect the valve core from dirt and moisture. Wave tubes should be installed without twisting or side load, because corrugation deformation changes the sensing calibration.
For maintenance and repair, we supply replacement capillary tubes, charging hoses and valve components so service teams can restore the original flow characteristics rather than substitute a different size. Spare parts are packed to protect tube ends and threads during transport.
Related Air-Conditioner and Refrigeration Parts
This category works alongside the rest of our Air-Conditioner Parts range, including Compressor units, control and protection components, and Refrigeration Parts for commercial and domestic systems. Customers building a complete service kit can combine charging valves, capillary tubes and connecting pipes with filters, fittings and tools from our wider PRODUCT catalogue.
Information We Use to Configure Your Solution
To prepare an accurate configuration and quotation, we need the following project inputs. Clear data at this stage reduces sample rounds and avoids mismatched flow characteristics.
- Refrigerant and system capacity or cooling duty.
- Required capillary bore and length, or the original part number and sample.
- Charging valve thread, core type and connection standard.
- Wave tube sensing range, medium and end connection drawing.
- Annual quantity, packaging preference and destination port.
- Any acceptance test, marking or documentation requirement.
Frequently Asked Questions
Can you supply capillary tubes matched to a specific cooling capacity?
Yes. We select bore and length from the refrigerant, condensing and evaporating conditions, and required mass flow. If you provide the original tube dimensions or a sample, we can match the flow characteristic and confirm the replacement specification.
What refrigerant types are your charging valves and tubes suitable for?
Our charging valves, copper tubes and capillary tubes are supplied for common refrigerants including R32, R410A, R134a and R600a. Material and seal selection is confirmed against the working pressure and refrigerant of your system.
Do you provide wave tubes and bellows in custom dimensions?
We configure wave tubes and bellows by corrugation profile, effective length, material and end fitting. A drawing or sample with the sensing range and connection interface allows us to propose a production-ready specification.
How are the parts packed for export?
Capillary tubes and connecting pipes are packed to protect ends and prevent bending, while charging valves and hoses are packed to protect threads and seals. Packaging can be adapted to your handling and storage requirements.
Can we combine this category with other HVAC parts in one order?
Yes. As a China-based supplier of air-conditioner and refrigeration parts, we support one-stop procurement across capacitors, compressors, control components, motors, fittings and tools, consolidating shipments for distributors and project buyers.
