Control systems Desuperheaters
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Local regulations may restrict the use of this product to below the conditions quoted. In the interests of development and improvement of the product, we reserve the right to change the specification without notice. © Copyright 2023
TI-P605-10 TES Issue 5
DA Series Variable Area Desuperheaters
Desuperheater overview Hiter direct contact desuperheaters reduce the temperature of superheated steam to produce steam temperatures approaching saturation temperature. Spray water is injected directly into the steam, flashing into vapour by absorbing heat from the steam. The DA series desuperheater is designed to precisely and economically control the downstream steam temperature by injecting cooling water directly into the superheated steam flow. It consists of a single actuator and a spray control valve integrated into a single unit. Typical applications: - High turndown applications that are beyond the scope of fixed area desuperheaters. - To safely reduce the steam temperature to allow the operation of downstream process equipment designed for lower temperatures, maintaining a constant temperature for processes precise temperature control - To reduce the temperature of steam discharge from turbine by-pass systems on power plants for heat exchangers, dump stations etc. - To improve heat transfer of indirect contact heat exchangers- shell and tube, plate type, reactor heating jackets, etc.
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Features: - Easy installation - Low maintenance - Robust design
- Wide Cv range
- Rapid evaporation to minimise over spray
- Minimal steam pressure drop
- Flexible design options
Standard and approvals - Pressure rating and connections according to ASME B16.34 and ASME B16.5, EN12516-1 and EN1092-1. - The products listed comply with the requirements of The EU Pressure Equipment Directive/UK Pressure Equipment (Safety) Regulations and carry the / mark when so required. - Welding is in accordance with ASME IX. - Connections are sized to suit the process conditions. - Standard ASTM materials of construction include: carbon steel, stainless steel and chrome molybdenum steel. Special materials are available on request. Documentation and certification: Each Spirax Sarco DA will be supplied with the following documentation & certification pack: - Material traceability certificates to EN 10204 3.1 for body assembly, plug, stem, and nozzles - Quality certificate indicating hydrostatic test and seat leakage (Class IV) test results - Warranty terms & conditions NDT reports are available on request Class V leakage certification available upon request.
For up to date information on product compliance please visit: www.spiraxsarco.com/product-compliance
TI-P605-10 TES Issue 5
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DA Series Variable Area Desuperheaters
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