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Steam Temperature Reduction Desuperheater by Direct Water Injection
This datasheet covers venturi-type multi-nozzle desuperheaters in WCB with SS316 internals for reducing superheated steam temperature by direct injection of atomised water in power, process, and steam distribution systems.
| Parameter | Specification |
|---|---|
| Size Range | DN50 to DN400 (2" to 16") |
| Pressure Rating | Class 300 / Class 600 |
| Body Material | WCB carbon steel with SS316 venturi liner and nozzle assembly |
| Nozzle Material | SS316 spring-loaded variable-area multi-nozzle array |
| Temperature Range | Steam inlet up to +540°C; outlet saturated to +250°C |
| Water Injection Pressure | Minimum 1.5 bar above steam pressure at injection point |
| Turndown Ratio | Up to 20:1 steam flow turndown with stable atomisation |
| End Connections | Flanged ASME B16.5, butt weld |
| Water Quality | Demineralised or condensate recommended; hardness < 0.1 ppm |
| Control | Separate temperature control loop with water injection modulating valve |
| Features | Multi-nozzle atomisation, spring-loaded variable area, venturi acceleration, low wetting length |
| Component | Material |
|---|---|
| Body | WCB carbon steel, sand cast, normalised, machined flange faces and nozzle mounting boss |
| Venturi Liner | SS316 investment cast venturi insert with polished internal surface for accelerated steam velocity |
| Nozzle Assembly | SS316 multi-nozzle manifold with spring-loaded variable-area pintle nozzles |
| Nozzle Springs | Inconel X-750 springs for high-temperature creep resistance and consistent nozzle opening pressure |
| Water Inlet | WCB or SS316 water inlet manifold with strainer and isolation valves |
| Gaskets | Spiral-wound SS316 + graphite for body/liner and flange joints |
| Internals | SS316 wear sleeves and guide bushings for nozzle alignment and erosion resistance |
| Test | Requirement |
|---|---|
| Test Standard | Hydrostatic shell test 1.5x design pressure; spray pattern witness test |
| Certification | CE, PED, ISO 9001, IBR |
| Standard | Description |
|---|---|
| Design Standard | ASME B16.34 / HEI 2624 / VDI 2173 |
The Desuperheater -- Venturi Type Multi-Nozzle WCB is designed, manufactured, and tested in accordance with applicable API / ASME / BS / ISO international standards. Compliance documentation and Material Test Certificates (EN 10204 3.1) are provided with every order.
Standard construction is carbon steel, stainless steel (CF8 / CF8M), and special alloy grades. Alternative and upgraded grades -- Duplex, Super Duplex, Inconel, Monel, Hastelloy, and NACE MR0175 trims for sour service -- are available on request.
It is offered in a range of sizes as per the technical specification with standard ANSI / ASME pressure classes (PN ratings on request). End connections include flanged (RF / RTJ), butt-weld, socket-weld, and screwed ends as per specification.
Yes. Supreme Valves India is an established exporter of industrial valves to Saudi Arabia (KSA), the UAE, Qatar, Kuwait, Oman, Bahrain, and across the Gulf. We provide sea-worthy export packing, EN 10204 3.1 / 3.2 certification, certificate of origin, and support for SABER / SASO conformity on KSA shipments.
Every valve undergoes hydrostatic shell and seat testing per API 598 / ISO 5208. Documentation includes EN 10204 3.1 MTC (3.2 on request), NDT reports, and fire-safe (API 607) or NACE MR0175 certification where applicable. Third-party inspection by TÜV, SGS, Bureau Veritas, or Lloyd's Register can be arranged.
Order quantities are flexible -- from single units for stocked items to bulk volumes for project requirements. Lead time depends on size, material, and quantity; please contact our team with your specification for a firm delivery schedule and quotation.