Jacketed Ball Valve -- Steam Tracing WCB
Steam Jacketed Full-Bore Valve for Temperature-Sensitive and Solidifying Media
Document No.SV-DS-BAL-013
RevisionRev A
DateMay 2026
ManufacturerSupreme Valves India, Ahmedabad, Gujarat, India
This datasheet covers steam jacketed ball valves in WCB with welded half-pipe jacket for molten sulphur, phthalic anhydride, hot oil, polymer, and asphalt service where media solidification must be prevented.
Technical Specifications
| Parameter | Specification |
|---|
| Valve Size Range | DN15 to DN200 (1/2" to 8") |
| Pressure Rating | PN40 / Class 300 process side; PN16 / Class 150 jacket side |
| Body Material | WCB carbon steel with welded half-pipe steam jacket |
| Ball Material | SS316 full-bore ball, mirror polished |
| Seat Material | PTFE or PEEK high-temperature seats |
| Stem Material | SS316 anti-blow-out stem with double O-ring seals |
| Packing | PTFE/graphite V-ring packing with live-loading gland |
| Gaskets | Spiral-wound SS316 + graphite for flange joints |
| Jacket Connections | 1/2" or 3/4" NPT or flanged steam inlet and drain connections |
| Temperature Range | -29°C to +250°C process; +200°C jacket steam limit |
| End Connections | Flanged ASME B16.5 / BS EN 1092-1 with jacketed flanges |
| Features | Integral steam jacket, full bore, drainable jacket, low torque, extended bonnet option |
Materials of Construction
| Component | Material |
|---|
| Body | WCB carbon steel with welded half-pipe steam jacket surrounding body and end flanges for uniform heat distribution |
| Jacket | SS304 or carbon steel half-pipe welded to body, hydrotested at 1.5x jacket design pressure |
| Ball | SS316 full-bore solid ball, mirror polished, vent hole drilled to prevent cavity pressure trapping |
| Seats | PTFE standard seats; PEEK high-temperature seats for hot oil and molten sulphur above 200°C |
| Stem | SS316 anti-blow-out stem with double O-ring seals and PTFE/graphite V-ring packing set |
| Packing | PTFE/graphite V-ring packing with Belleville spring live-loading for constant compression |
| Gaskets | Spiral-wound SS316 + graphite for process flange joints; same for jacket flange connections |
Testing & Inspection
| Test | Requirement |
|---|
| Test Standard | API 598 / ISO 5208 / jacket hydrotest at 1.5x jacket pressure |
| Certification | CE, PED, ISO 9001 |
Applicable Standards
| Standard | Description |
|---|
| Design Standard | ASME B16.34 / API 608 / ISO 17292 |
Notes
- Jacket is hydrotested at 1.5x jacket design pressure before welding to body; do not weld additional fittings to jacket in field.
- Steam supply pressure must not exceed jacket rating (PN16 / Class 150); overpressure will deform half-pipe and cause leaks.
- Drain connection must be at lowest point of jacket to ensure complete condensate removal; pitch pipe 1:100 towards drain.
- For molten sulphur service, specify steam jacket with condensate drain and steam trap to maintain 135-145°C valve temperature.
- Extended bonnet with packing cooling fins is recommended for service above 250°C to protect stem packing and actuator.
