Bolt-design bonnet castings for pressure-critical operations
At Super Quali Cast, we produce investment castings for bonnet applications that support type A and B fire safety valves for use in pressure-critical and hazardous environments. As reliable bonnet castings manufacturers, we supply fire-safe valve components, including bonnet investment castings, to domestic and international valve manufacturers and OEMs.
We make our bonnets using the lost wax precision investment casting process. It ensures tight tolerance, excellent geometry, and superior surface finish while lowering machining and milling costs.
Our Manufacturing Process of Bonnet Investment Castings
Molding and Investing
Creating molds in-house, attaching them to a runner, and introducing the wax pattern tree into a ceramic slurry—up to eight times.
Dewaxing
Placing the ceramic shell into an autoclave to melt the wax and return a hollow cast ready for pouring.
MTC and Pouring
Testing the metal for purity, issuing an MTC, and gravity pouring the liquid metal into the ceramic shell.
Heat Treatment
Introducing knocked-out components into a pre-heated furnace to improve material strength and hardness.
CNC Machining
Face milling and ancillary machining for establishing tight tolerances and smooth sealing surfaces.
Final Inspection
Inspecting components visually and with universal testing machines to comply with industry standards, particularly ASME B16.34.
Technical Specifications of Our Bonnet Castings
| Specification Area | Details |
|---|---|
| Development & Sampling | 25-40 days |
| Casting Process | Investment Casting, Lost Wax Casting |
| Material Grades | Stainless Steel, Iron, Nickel-based Alloys |
| Industry Standards | ASME B16.34, API 600, API 602 |
| Shell Building Media | Ceramic, Stucco |
| Casting Weight Range | 0.003 kg up to 90 kg (Stainless Steel) |
| Maximum Dimensions | 1950 mm |
| Minimum Wall Thickness | 3.3 mm |
| Casting Tolerances | ISO 8062, ISO 8062-3, CT4 to CT7 |
| Heat Treatment Options | Normalizing, Quenching, Tempering |
| Surface Treatment Options | Powder Coating |
Note: Certain technical specifications, such as wall thickness, are subject to change depending on the material used and applicable standards.
Why Choose Super Quali Cast as Your Bonnet Castings Manufacturers
As experienced bonnet castings manufacturers, we deliver bonnet investment castings that meet performance, quality, and global compliance requirements for critical valve applications.
Proven Experience in Bonnet Investment Castings
Exhaustive experience in casting various valve components for challenging environments. This helps us better understand your needs while also meeting functional and design requirements.
Advanced Manufacturing Capabilities
End-to-end bonnet investment castings from 3D prototyping to application-ready components. Our state-of-the-art ISO 9001 facility enables our engineers to move quickly from prototyping to production at volume using the material of your choice.
Material & Application Versatility
Leading bonnet castings manufacturers proficient in working with a wide range of casting metals and materials. Our components align with application-specific expectations, exceed industry standards, and routinely support demanding service conditions.
Quality, Testing & Global Supply Readiness
We issue and share an MTC certification, highlighting the details of in-house tests and support for third-party testing. We comply with established international standards and regularly export to the US, the UK, Canada, Brazil, the Middle East, Japan, and the rest of Asia-Pacific.
Applications of Bonnet Castings
Our bonnet castings play a critical role in pressure-sensitive, fire-critical operations. As a countermeasure against fire hazards, our bonnet castings find application in:
- Automobile: Installed at multiple nodes in the production process, including the body shop and paint booths.
- Railways: Deployed in sheds, maintenance depots, and workshops.
- Petroleum and Gas: Placed at multiple junctions along the delivery network.
- Chemical Processing: Installed near pump houses and distillation columns.
- General Engineering: Positioned in multiple areas, including forging floor and machining shops.
About Super Quali Cast: Background & Capabilities
Super Quali Cast delivers precision investment castings for bonnet with strong manufacturing capabilities, global supply experience, and compliance with international standards.
- Decades of Experience: Investment casting valve components for more than four decades for diverse industries.
- Focused Manufacturing: Lost wax casting valve components for railways, pump parts, automobiles, and more.
- Global Reach: Supplying domestic and international industrial valve manufacturers and OEMs in the UK, the US, Europe, Canada, and Latin America. We also ship to businesses in the Middle East, Japan, and the rest of Asia-Pacific.
- End-to-End Capabilities: Prototype-to-production under one roof. Each step in the manufacturing process is handled in-house.
- Production Scale & Compliance: Annual production exceeding 2400 metric tonnes and compliance with multiple domestic and international standards, including PED, AD 2000-MERKBLATT W0, IBR.
Discuss Your Bonnet Investment Casting Requirements.
Get in touch with our experts to learn more about material types, 3D prototyping, and production readiness.
Frequently Asked Questions
Are your bonnets pressure tested?
Our bonnet castings are produced in an IBR-rated facility and, as such, are pressure tested.
What materials do you use for manufacturing bonnet castings?
We primarily use stainless steel. However, we also work with iron and nickel-based alloys, based on what you want and if it makes better industrial sense.
Are your bonnets meant to be bolted or screwed?
Our bonnets are designed to be bolted, not screwed.
Do you support custom designs?
Yes, we support custom designs for complete product-application fit.
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