Fisher™ Yarway™ 4300 TempLow™ Steam Desuperheater

The Fisher™ Yarway™ 4300 TempLow™ Steam Desuperheater, designed by Emerson, is a high-precision device engineered to reduce superheated steam temperature efficiently and reliably by injecting finely atomized water into the steam flow. This compact and robust desuperheater is built for high-performance temperature control in power generation, refinery, and process steam systems, ensuring optimal heat energy management and equipment protection. The 4300 TempLow™ utilizes a venturi-style design that provides excellent mixing and heat transfer characteristics between the injected cooling water and the steam. Its integrated atomizing nozzle system ensures uniform temperature reduction and prevents water droplet impingement, eliminating the risk of thermal shock or erosion downstream. Engineered for precise modulation and rapid response, the Fisher Yarway 4300 maintains stable outlet temperature control under varying load conditions, making it ideal for use in boiler bypass, turbine protection, and steam conditioning applications.

Technical Specification of Fisher™ Yarway™ 4300 TempLow™ Steam Desuperheater

Critical Service

Steam Condition

Flow Characteristics

Equal percentage, Linear, Modified Equal Percentage

Operating Temperature

High Temperature

Pressure Class

ASME

Shutoff Class

Class V (FCI 70-2)

Valve Size

NPS 1 / DN 25 x NPS 3 / DN 80

Valve Size Standard

NPS

Valve Type

Angle Valve

Material

Alloy

Other Configurations

Contact your local Emerson sales office to learn about additional specifications or options for this product.

Feature of Fisher™ Yarway™ 4300 TempLow™ Steam Desuperheater

• 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.