Valve Casting

Valve Casting – Category Overview
Valve casting is our upstream core business. We specialize in providing stainless steel and special alloy valve castings to valve manufacturers and engineering companies, covering Investment Casting, Sand Casting, and Vacuum Casting processes.

We are a factory, not a trading company — every process from wax pattern making, shell building, pouring, heat treatment, to rough machining is completed in-house. We deliver precision castings, not blanks. Our castings are dimensionally accurate, internally sound, and fully traceable, ready to enter the finishing lines of our customers.

FAQ

Material Coverage

Stainless Series: CF8 / CF8M / 304 / 316L
Duplex Series: 2205 / 2507 / 254 SMO
Special Alloy Series: Hastelloy C276/B3, Inconel 625/718, Monel 400/K500, Titanium Gr.2/Gr.5, Zirconium Zr 702/Zr 705, Nickel Aluminum Bronze C95800/C95500, Alloy 20
Carbon Steel: WCB / LCC (complementary)

Casting Processes

Investment Casting — In-house wax patterns, dimensional accuracy CT6-8, surface roughness Ra≤6.3μm, ideal for small-to-medium stainless steel and special alloy valve castings
Sand Casting — Suitable for large bore valve castings and carbon steel castings
Vacuum Casting — Dedicated to high-purity special alloys (Hastelloy, Inconel, Titanium, Zirconium) with material density ≥99.5%, internal defects well below ASTM E446 Grade I
Casting Types: Valve bodies, bonnets, discs, seat rings, balls (ball valves), gates (gate valves), discs (butterfly valves), plugs (globe valves), tees/cross fittings

Delivery Conditions

As-Cast
Riser Removed + Shot Blasted
Solution Annealed
Rough Machined — Machining allowance adjustable per customer requirements
Finished Machined — Fully machined to drawing specifications
Size Range: 0.5kg – 1000kg per piece (Investment Casting), up to 5000kg (Sand Casting)

Testing Capabilities

Spectrographic Analysis — Per melt batch, 100% traceable
UT Inspection — 20% sampling, 100% available for critical orders
RT Inspection — Per order requirements
PT Inspection — Surface defect detection
Dimensional Inspection — CMM
Hardness Testing — Per batch
Certificates: ISO 9001, EN 10204 3.1/3.2, CE, EAC
Applications: Petrochemical valve castings, oil & gas pipeline valve castings, power plant valve castings, seawater valve castings, chemical process valve castings, general industrial valve castings

Production Highlights

In-house wax pattern production for consistent dimensional accuracy and reliable lead times
Dedicated vacuum casting line for high-end special alloy castings with density ≥99.5%
Spectrographic analysis per melt batch with composition deviation controlled within ±5% of standard range
UT sampling per batch, 100% inspection available for critical orders with full reports
Casting traceability to melt batch number — full traceability from raw material to finished casting
Machining allowance per customer requirements — standard allowance 2-4mm per side