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RTK Injection Cooler – Desuperheated Steam Cooler

Schroedahl Type DKM Small Desuperheater to Control the Temperature of Superheated Steam or Gas

Schroedahl Type DKM Small Desuperheater to Control the Temperature of Superheated Steam or Gas

Schroedahl Type DKV Desuperheater to Control the Temperature of Superheated Steam or Gas

Product Features

  • The spray water cooler (lance design) works with controlled nozzle technology for extremely effective steam cooling
  • Spray head with integrated high-performance nozzles.
  • Selectable control characteristics for precise temperature control
  • A large water vapour pressure difference Delta p is permitted
  • Excellent pressure atomization
  • Tight shut-off, no leakage in closed position
  • High control accuracy over the entire control range
  • Tightly closing metallic seat. No leakage in closed position and thus no emptying of the cooling water lines possible.
  • Contains the pressure injection nozzle, no additional control valves required
  • High operational reliability through the use of simple components, minimal wear and tear
  • Excellent control accuracy over the entire control range

Applications

  • For steam cooling in power plant applications and for general gas cooling applications with
    water injection

Nominal Diameter: DN 150-1200 / NPS 6-24

Pressure Class:  PN 15-250 / Class 150-1500

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Availability: In stock
SKU
SH00800W

Product Features

  • The spray water cooler (lance design) works with controlled nozzle technology for extremely effective steam cooling
  • Spray head with integrated high-performance nozzles.
  • Selectable control characteristics for precise temperature control
  • A large water vapour pressure difference Delta p is permitted
  • Excellent pressure atomization
  • Tight shut-off, no leakage in closed position
  • High control accuracy over the entire control range
  • Tightly closing metallic seat. No leakage in closed position and thus no emptying of the cooling water lines possible.
  • Contains the pressure injection nozzle, no additional control valves required
  • High operational reliability through the use of simple components, minimal wear and tear
  • Excellent control accuracy over the entire control range

Applications

  • For steam cooling in power plant applications and for general gas cooling applications with
    water injection

Technical Data

Nominal diameter DN 150–1200 / NPS 6-24
Pressure class PN 15–250 / Class 150–1500
Temperature (max.)

Up to 650°C / 1200°F

Housing material 1.0460 / A105
1.5415
1.7335 / A182F12CI.2
1.7383 / A182F22CI.3
1.4903 / A182F91
Housing type Forged
Media Superheated Steam, Gas
Flanges EN 1092-1, ASME B16.5, ISO 7005, JIS, JPI
Actuators Pneumatic, Electric, Hydraulic, Handwheel (for manual operation)
Number of stages (max.) 1
Number of controlled stages (max.) 1
Operating range (max.) 1:100

Function

Desuperheating (cooling) the steam can simply be achieved by injecting water into the steam flow. When injected, the water is evaporated by means of the desuperheater nozzles. Thereby the water absorbs heat and consequently the temperature of steam is reduced. The desuperheater type DKV is designed so that even at low injection water quantities an efficient spray of very fine droplets (mist) is obtained.

The nozzles in the sprayhead are designed to give the injection water a high velocity and a radial rotating movement under all conditions. This achieves a very fine atomization and consequently a rapid evaporation of the water.

The temperature sensor sends a control signal to the actuator, bringing the control spool into a stroke position corresponding to the characteristic curve. The cooling fluid is now admitted to the
injection nozzle and is accelareated at the nozzle insert.

In the nozzle chamber, the cooling medium is accelerated and rotated by means of a swirl insert, so that a spray of the finest atomization is produced when it exits into the steam line. Our high quality atomization of the cooling liquid is the basis of a good mixing from cooling fluid and steam at all load conditions. The position of the valve seat, just before the spray head, provides a tight shut-off in the closed position, so that dripping is prevented (the piston is lapped into the seat!). The small number of moving parts results in a reliable operation of the valve.