Industry: commercial refrigeration and HVAC
CNC machined valve bodies and fittings for commercial refrigeration
Commercial refrigeration needs brass, stainless, and copper-alloy valve bodies, headers, and threaded fittings machined to seal-tight tolerances with clean internal surfaces. Boyang supplies CNC-turned and milled refrigeration components with batch traceability and standard thread gauges.
Boyang machines brass, stainless, and copper-alloy valve bodies, headers, and threaded fittings for commercial refrigeration and HVAC subsystems. Typical parts include expansion-valve bodies, solenoid-valve manifolds, header fittings, and flare-connect fittings. Internal passages are machined to drawing requirements; external threads follow BSP, NPT, or SAE per the customer’s standard.
Compliance: NSF/ANSI 61 (lead-free brass) is available by arrangement with the appropriate brass grade (C27450 / C36300). Standard brass grades contain lead and are not NSF 61 certified.
Typical parts and use cases
| Part type | Typical requirement |
|---|---|
| Expansion-valve bodies | Brass CW617N (C36000 equivalent) or stainless; internal bore ±0.025 mm. |
| Solenoid-valve manifolds | Multi-port brass manifolds with NPT or BSP threads; pressure-test to spec. |
| Header fittings and distributors | Copper or brass; tube-connection ends machined to SAE flare or solder-cup dimensions. |
| Threaded adapter fittings | Brass or stainless; threads cut to BSP, NPT, or SAE J512. |
| Compressor mounting hardware | Steel or stainless; high-volume production. |
Material grades typically used
Common grades include:
brass-CW617Nbrass-C36000brass-C27450 (lead-free)stainless-316Lstainless-304copper-C12200
Capabilities used in this industry
- CNC turning
- CNC milling
- Threading (BSP, NPT, SAE)
- Internal-passage machining
- Pressure-test
- CMM inspection
Related case study
- Commercial refrigeration manufacturer — Brass valve body and stainless fitting machined for a refrigeration OEM.
Frequently asked questions
Can you supply lead-free brass valve bodies?
Yes, by arrangement. NSF/ANSI 61 lead-free brass (C27450 or C36300) is supplied with full mill certification.
What internal surface finish do you recommend for refrigerant passages?
Ra 1.6–3.2 (µm) is typical for machined bores. Tighter finishes (Ra 0.8) are achievable by arrangement with secondary honing or electropolishing.
Do you cut NPT, BSP, or SAE threads?
All three. Standard thread gauges (NPT, BSPT) are held in-house. Customer-supplied gauges are accepted by arrangement.
What is the minimum order quantity for a new refrigeration part?
For new parts, prototype runs of 20–100 pieces are routine. Production runs typically start at 200–500 pieces.
Can you pressure-test before shipment?
Yes. Hydrostatic and pneumatic leak-tests are available by arrangement; test pressure and acceptance criteria follow the customer specification.
Request a quotation for commercial refrigeration
Send drawings in STEP, IGES, or PDF with tolerances and inspection points. We respond with material options, lead time, and unit price within 2 business days.