The Three-Way Diverter Valve Body is a multi-port pressure-containing component designed for pipeline flow switching in oil & gas, petrochemical, and process industries. With three flanged or threaded ports arranged in L-port or T-port configuration, this valve body must maintain seal integrity across multiple seating surfaces while withstanding system pressures up to ANSI Class 600 (100 bar). Ningbo Ruican manufactures this component using WCB (ASTM A216) carbon steel investment casting, delivering the complex internal port geometry, flange precision, and wall uniformity that pipeline valve OEMs require. The integrated CNC machining process ensures flange face flatness within 0.05mm and bore concentricity within 0.02mm.
Material Specifications
| Parameter | Specification |
|---|---|
| Material Grade | WCB (ASTM A216 / Grade WCB) Carbon Steel |
| Tensile Strength | ≥ 485 MPa |
| Yield Strength | ≥ 250 MPa |
| Elongation | ≥ 22% |
| Hardness | ≤ 187 HB |
| Heat Treatment | Normalizing at 920°C + Tempering at 620°C |
| Wall Thickness | 6.0–20.0 mm |
| Dimensional Tolerance | CT7 (ISO 8062) |
| Weight Range | 5.0–35.0 kg |
Manufacturing Process
- Wax Pattern Injection: Multi-cavity wax die for three-port body geometry with integral flanges
- Shell Building: 8–10 layer ceramic shell with mullite stucco for heavy-section casting integrity
- Dewaxing & Firing: Controlled autoclave dewaxing, shell firing at 1050°C
- Pouring: WCB carbon steel poured at 1590–1620°C with deoxidation (aluminum)
- Heat Treatment: Normalizing at 920°C for 1.5 hours, air cool; tempering at 620°C for 2 hours
- CNC Machining: 5-axis CNC for flange faces (Ra 3.2 µm, flatness 0.05mm), bore machining, seat pockets
- Pressure Testing: Shell test at 1.5× rated pressure, seat test at 1.1× rated pressure per API 598
- Surface Treatment: Fusion bonded epoxy (FBE) coating or hot-dip galvanizing per customer spec
- Inspection: CMM dimensional, radiographic (RT per ASTM E1030), magnetic particle, hardness
Key Features
- Multi-Port Geometry: Investment casting enables complex three-way internal porting without fabricated assemblies
- ASME B16.34 Compliant: Pressure-temperature ratings verified through hydrostatic testing per API 598
- Flange Precision: CNC-machined flange faces achieve 0.05mm flatness and Ra 3.2 µm finish for reliable gasket sealing
- Radiographically Verified: X-ray inspection per ASTM E1030 ensures internal soundness for pressure-containing service
- Normalized & Tempered: Heat treatment delivers uniform microstructure with 485 MPa tensile strength and 22% elongation
- Corrosion Protection: FBE or galvanized coating provides long-term protection in buried and exposed pipeline applications
Application Fields
- Oil & gas pipeline flow diversion
- Petrochemical process switching
- Steam distribution systems (ANSI Class 300–600)
- Water treatment plant flow control
- Power plant cooling water systems
- Slurry and mining process pipelines
Why Choose Ningbo Ruican
Ningbo Ruican’s 17+ years of WCB carbon steel investment casting, combined with IATF 16949 quality systems, delivers valve bodies that meet ASME B16.34 and API 598 requirements. Our multi-port casting capability eliminates weld seams and fabrication joints, improving structural integrity and reducing leak paths. We provide full material certification (3.1 EN 10204), NDT reports, and PPAP documentation for valve OEM qualification.
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