Ningguo Kingcool Import and Export Co., Ltd is a China-based Brass & Copper Fitting Manufacturers and a one-stop supplier of HVAC and refrigeration parts. We combine industry and trade, producing metalized polypropylene film capacitors while acting as an agent for air conditioner and refrigerator accessories.
Our brass and copper fitting range covers access valves, brass adapters, forged nuts, standard unions, ball valves and air conditioning valves in SAE sizes from 1/8 in to 1-1/8 in, supporting refrigeration, air conditioning and appliance assembly projects.
Our Position in the Brass & Copper Fitting Category
As a Refrigeration Parts-Brass & Copper Fitting Manufacturers, we match product configuration to the application, operating limits, interfaces and acceptance criteria defined for each project.
We supply brass and copper fittings as part of a broad refrigeration and HVAC parts portfolio. Our business model places each employee directly in contact with the market, so fragmented and personalized requirements are captured quickly and matched to the right product or configuration.
Because we also supply compressors, capacitors, copper tubes, control valves, filter driers and installation materials, fittings can be consolidated with other refrigeration components in a single order. This reduces the number of supply contacts a project manager or distributor needs to manage.
Product Range and Application Fit
The table below shows the brass and copper fitting types we offer, their SAE size coverage and the applications they serve.
| Product Type | Size Range | Typical Application |
|---|---|---|
| Access Valve | 1/8, 3/16, 1/4, 5/16, 3/8, 1/2 in | Service access on refrigeration and air conditioning systems |
| Brass Adapter | Out 1/4 x In 5/16; Out 5/16 x In 1/4 | Connecting different tube or port sizes |
| Forged Nut | 1/4, 5/16, 3/8, 1/2, 5/8, 3/4, 7/8 in | Flare and threaded connections in refrigerant lines |
| Standard Union | 1/4, 5/16, 3/8, 1/2, 5/8, 3/4, 7/8 in | SAE-standard joints for service and assembly |
| Ball Valve | 1/4, 5/16, 3/8, 1/2, 5/8, 3/4, 7/8, 1-1/8 in | Isolation and flow control in refrigerant circuits |
| Air Conditioning Valve | 1/4, 5/16, 3/8, 1/2, 5/8, 3/4, 7/8, 1-1/8 in | A/C line connections and service ports |
Materials and Critical Specifications
Brass and copper fittings for refrigeration service must resist vibration, thermal cycling and refrigerant exposure. Our fittings are produced in brass and copper to suit common refrigerant and oil combinations.
- Connection standard: SAE flare and thread forms for compatibility with widely used refrigeration tools and hoses.
- Size coverage: 1/8 in through 1-1/8 in depending on product type.
- Material: brass for adapters, nuts, unions and valves; copper for selected fitting bodies and tube connections.
- Sealing: machined seats and threads designed for leak-tight joints when correctly torqued.
Where a project requires a specific thread form, material grade or pressure rating, we confirm the requirement against the drawing or sample before quoting.
Configuration and Customization
Our brass and copper accessory production supports both standard parts and customized items. We can review customer drawings and produce samples for approval before series supply.
Standard Fittings
Access valves, adapters, forged nuts, unions, ball valves and A/C valves in listed SAE sizes.
Drawing-Based Parts
Custom brass and copper accessories produced from customer drawings or samples, with sample approval before batch production.
Combined Orders
Fittings consolidated with copper tubes, control valves, filter driers and other refrigeration parts for one-stop procurement.
Quality Approach and Acceptance
Our capacitor production uses high-precision slitting and winding equipment with real-time monitoring and automated warehousing. The same quality-first discipline applies to the brass and copper fittings we supply: incoming parts are checked against the agreed specification before shipment.
- Dimensional verification against the approved drawing or sample.
- Thread and seat inspection for SAE compatibility.
- Visual inspection for surface defects, burrs and contamination.
- Batch identification and packing checks before dispatch.
Acceptance criteria are agreed at the quotation stage so that the delivered fittings match the project requirement.
Integration with Refrigeration and HVAC Systems
Brass and copper fittings sit at the connection points of a refrigeration circuit. They must match the tube size, thread form and service access needs of the surrounding components.
We supply fittings alongside Refrigeration Parts such as copper tubes, control valves, filter driers and vibration absorbers, and alongside Air-Conditioner Parts including compressors, capacitors and control components. This lets a project manager source the full connection set from one supplier.
For distributors, the range is organized so that common SAE sizes can be stocked together with related installation materials and tools.
Installation, Maintenance and Serviceability
Correct installation of brass and copper fittings depends on clean threads, correct torque and compatible sealing methods. We supply fittings that are machined for standard SAE flare and thread connections, so they work with common refrigeration tools.
- Keep caps and plugs in place until installation to prevent contamination.
- Use the specified torque for the size and thread form.
- Replace damaged or over-torqued fittings rather than reusing them.
- Stock common sizes as service spares to reduce downtime.
We can supply replacement fittings and related components for after-sales and maintenance programs.
Information We Use to Configure Your Solution
To prepare a suitable fitting proposal, we need the following project inputs. This list keeps the quotation accurate and avoids mismatches at installation.
| Input | Why We Need It |
|---|---|
| Fitting type and size | Matches the connection point and tube diameter |
| Thread or flare standard | Ensures compatibility with existing ports and hoses |
| Material requirement | Confirms brass or copper grade for the application |
| Quantity and packaging | Sets batch size, packing and delivery scope |
| Drawing or sample | Required for custom or non-standard fittings |
| Destination and documentation | Prepares export packing and shipping documents |
Frequently Asked Questions
What brass and copper fitting sizes does Kingcool supply?
We supply access valves from 1/8 in to 1/2 in, forged nuts and standard unions from 1/4 in to 7/8 in, and ball valves and air conditioning valves from 1/4 in to 1-1/8 in. Brass adapters are available in Out 1/4 x In 5/16 and Out 5/16 x In 1/4 configurations.
Can Kingcool produce custom brass and copper fittings from drawings?
Yes. We review customer drawings and produce samples for approval before series supply. Custom work covers standard brass pipe fittings, copper joints and more complex structural accessories.
Are the fittings compatible with common refrigeration tools?
Our fittings use SAE flare and thread forms, so they are compatible with widely used refrigeration service tools and hoses. We confirm the specific thread or flare standard against your requirement before quoting.
Can fittings be ordered together with other refrigeration parts?
Yes. We supply brass and copper fittings alongside copper tubes, control valves, filter driers, compressors, capacitors and other HVAC parts, providing one-stop procurement for distributors and project managers.
What information is needed for a fitting quotation?
We need the fitting type and size, thread or flare standard, material requirement, quantity and packaging preference, plus a drawing or sample for custom items. Destination and documentation requirements are also confirmed at quotation stage.
How are the fittings packed for export?
Fittings are packed to protect threads and seats during transport, with batch identification and packing checks before dispatch. Export packing and shipping documents are prepared according to the destination and order scope.
