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Fisher™ Yarway™ 4300 TempLow™ Steam Desuperheater
Fisher Yarway 4300
For precise and economical control of steam temperature, the Fisher Yarway probe-type TempLow desuperheater automatically introduces cooling water into steam flow in response to a pneumatic or electric control signal.
Fisher™ Yarway™ 4300 TempLow™ Steam Desuperheater


Critical Service
Steam Condition
Flow Characteristics
Equal percentage, Linear, Modified Equal Percentage
Operating Temperature
High Temperature
Pressure Class
Shutoff Class
Class V (FCI 70-2)
Valve Size
NPS 1 / DN 25 x NPS 3 / DN 80
Valve Size Standard
Valve Type
Angle Valve
Other Configurations
Contact your local Emerson sales office to learn about additional specifications or options for this product.


  • Installation in straight, vertical, or horizontal pipe
  • Minimal headroom is required for mounting
  • Only standard connections are involved for all sizes: NPS 1 (DN 25) water, NPS 3 (DN 80) steam
  • Few components are required
  • No atomizing steam or pipeliners, which complicate installation are required
  • Only 15 feet (4 to 5 meter) of straight run piping downstream
  • Rapid evaporation of water is achieved to minimize the accumulation of water in the line
  • Control within 10°F (6°C) of saturation is possible
  • Hardened stainless steel nozzles minimize wear
  • Optimized spray pattern with variable capacity swirl nozzle technology allows for a wide operating range to achieve optimal mixing and quick vaporization at all flowing conditions.
  • Spray cylinder can be easily removed and replaced without having to replace the entire unit.