Ningbo Ruican manufactures the plug valve bonnet using investment casting for water, oil, gas and process pipelines. The Stainless Steel CF8M construction gives the part the strength and corrosion behavior demanded by modern industrial piping and flow control applications. Tight-tolerance CNC machining, surface treatment and final inspection are completed in-house, so buyers receive a ready-to-assemble component with EN-compliant certification and full batch traceability.
Specifications
| Parameter | Value |
|---|---|
| Material | Stainless Steel CF8M (316) |
| Casting Process | Investment Casting |
| Weight Range | 0.05 – 15 kg |
| Dimension Tolerance | ISO 8062 CT5-CT7 |
| Surface Treatment | Shot blasting + passivation |
Key features
- As-cast tolerance ISO 8062 CT5-CT7 with CNC machining to drawing tolerances
- Stainless Steel CF8M melt with furnace-number traceability for every batch
- Surface finished by shot blasting + passivation
- One-stop service: casting, machining, drilling, tapping and coating
- Low-to-mid volume OEM/ODM production with stable lead times
Applications
- Power plant and marine piping
- Water supply and drainage pipelines
- Oil and gas transmission lines
- Chemical and process industries
- HVAC and fire-protection systems
Quality & compliance
Valve components are cast to ASTM A216 / A351 / EN 1563 as applicable, under ISO 9001. Seat faces and sealing areas are machined to tight tolerance, pressure-relevant castings can be hydrotested, and all heats are traceable.
FAQ
What is the MOQ for plug valve bonnet?
MOQ starts from 50-100 pcs depending on size and process. Sample batches and prototype castings are welcome for validation.
What tolerances can you hold on the plug valve bonnet?
As-cast tolerance follows ISO 8062; critical faces are CNC machined to drawing tolerance, typically IT7-IT9.
Can you provide material certificates?
Yes. Each batch ships with EN 10204 3.1 material certificates and full heat-number traceability.
Need a quote for plug valve bonnet? Send your drawing to sales@cnsandcasting.com or WhatsApp +86 137 7712 4360 for a fast RFQ response from Ningbo Ruican.
