Steam Jacketed Control Valve for High Temperature
Integrated Steam Jacket · DN25–DN300 · PN16/PN40 · Up to +425°C
Reguvale's steam-jacketed control valve keeps viscous or freeze-prone media (heavy oil, bitumen, sulphur, molten polymer, chocolate) hot enough to flow, even when the line is idle. An integral steam or thermal-oil jacket wraps the body and bonnet so the process fluid never drops below pour-point.
The valve itself is a heavy-duty globe or cage-trim design in WCB carbon steel with SS316 / Stellite trim and metal-to-metal seat for sustained +425°C duty. Multi-spring pneumatic diaphragm or electric-motor actuators deliver the modulating stroke. The jacket accepts saturated steam or thermal-oil supply and is fully drainable for safe shutdown.
Standard sizes DN25–DN300 in PN16 / PN40 cover most refinery, petrochemical and food-process duty. Higher pressure ratings, alloy bodies and bellows seals are quoted on request.
Key Features
Prevents Solidification
Integral steam / thermal-oil jacket keeps heavy oil, bitumen, sulphur and molten polymer above pour-point during idle periods.
High-Temperature Trim
SS316 / Stellite-faced plug and metal seat handle sustained +425°C without seat softening or galling.
Field-Serviceable
Plug, seat and packing can be replaced without breaking the steam jacket connection.
Drainable Jacket
Jacket is fully drainable on shutdown, eliminating water-hammer risk and freeze damage.
Pneumatic or Electric
Multi-spring diaphragm or reversing-motor actuator; positioner-ready for 3-15 psi / 4-20 mA.
Heavy-Duty Body
WCB carbon steel body with full-length stainless or hard-facing on all wetted surfaces for long service life.
Technical Specifications
| Parameter | Specification |
|---|---|
| Body Material | WCB Carbon Steel (std) / SS316 / Alloy on request |
| Plug / Trim | SS316 / Stellite Faced / 17-4PH |
| Seat Material | SS316 / Stellite (metal-to-metal) |
| Jacket | Carbon steel, factory-tested to 4 bar steam |
| Body Type | Globe, single-seat high-temperature |
| Size Range | DN25 – DN300 (1" – 12") |
| Pressure Rating | PN16 / PN40 (ANSI 150 / 300 on request) |
| End Connection | Flanged (ISO 7005-2 / ASME B16.5) |
| Flow Characteristic | Equal-Percentage / Linear |
| Actuator Type | Pneumatic diaphragm / Electric motor |
| Control Signal | 3-15 psi / 4-20 mA / On-Off |
| Positioner | YT-1000 / YT-1050 / Smart digital |
| Temperature | Up to +425°C (process) |
| Jacket Pressure | Saturated steam up to 4 bar (higher on request) |
| Standards | IEC 60534 / GB/T 4213 / ANSI/ISA-75 |
| Certification | ISO 9001:2015, SGS MTC available |
Frequently Asked Questions
Why do I need a steam jacketed control valve?
When the process fluid solidifies, gels or becomes too viscous to flow when cold (heavy oil, bitumen, sulphur, chocolate, molten polymer), a steam jacket keeps it hot enough to move - even when the line is idle.
What goes in the jacket - steam or thermal oil?
Either. Low-pressure saturated steam (up to 4 bar) is most common; thermal oil is used for higher temperatures or where steam is not available.
Can I field-service the trim without breaking the jacket?
Yes. The plug, seat ring and packing can all be replaced with the jacket connection undisturbed.
Applications & Use Cases
Heavy Oil & Bitumen
Refinery transfer lines, storage-tank discharge and pipeline pumping stations.
Petrochemical
Polymer melt, hot-resin and high-viscosity intermediate service.
Sulphur & Chemicals
Molten sulphur, pitch and other freeze-prone chemicals.
Food & Confectionery
Chocolate, caramel and fat-blending lines requiring constant temperature.
