Multi Nozzle Spray

The Kiekens Multi Nozzle Spray (MNS) Desuperheater (Attemperator) is suitable for use in VHP/HP/MP/LP steam pressure applications. The stainless-steel version of the MNS is often deployed in processes that involve extreme cold gases like cryogenic LNG. This versatile Desuperheater is custom designed and built and can easily be harmonized with other parts of your installation.

Multi Nozzle Spray (MNS) Desuperheater / Attemperator

The Kiekens Multiple Nozzle Spray (MNS) Desuperheater controls the steam temperature by regulating the cooling water flow through a variable number of spray nozzles in operation.

They key feature of the Attemperator is an integrated water control valve, which obtains a stable conditioned desuperheated steam flow temperature against a negligible steam side pressure drop.

Reasons to choose the Desuperheater Nozzle of Kiekens

  • Custom design
  • Easy to install
  • Lifetime up to 30-40 years
  • Low to zero maintenance requirements
  • Lowest cost of ownership
  • Large desuperheating range

Functionality of the Kiekens Multi Nozzle Spray (MNS) Desuperheater

The Kiekens Multi Nozzle Spray Desuperheater controls steam temperature by regulating the cooling water flow through a variable number of spray nozzles in operation. The Desuperheater Nozzle is built to your specifications. This means the (Kv/Cv) value and the number of nozzles – 6 at the least, 9 at the most – will be calculated according to your specific process conditions. The Kiekens MNS is installed perpendicular in your pipeline system and can be coupled to an actuator and positioner of your preference. Installation is easy and does not require any specific tools.

They key feature of the Kiekens MNS Desuperheater is an integrated Temperate Control Valve (TCV), which secures a stable conditioned desuperheated steam flow temperature against a negligible steam side pressure drop. The cooling water flow is regulated inside the desuperheater body. Therefore, the liquid pressure remains constant, independently of the number of spray nozzles (Kv/Cv) in operation. Control of the spray nozzle opening is achieved by positioning the piston that is operated directly by the actuator, which is mounted onto the Desuperheater.

Applications of the Multi Nozzle Spray Desuperheater

The Kiekens MNS Desuperheater is suitable for use in VHP/HP/MP/LP steam applications, such as power plants. The stainless-steel version of the Kiekens MNS is resilient to cryogenic temperatures and is therefore commonly used in LNG receiving, storage and regasification terminals.

Desuperheater Nozzle Design

Are you interested in a Desuperheater Nozzle design? Just navigate to the desuperheater design calculation page and fill in the contact form. You will receive a (budget) proposal for the Kiekens Desuperheater custom made to your wishes and conditions.

A Kiekens MNS desuperheater can be provided with an actuator/positioner/airfilter combination of any brand specified.

Nozzle spray head of insertion type desuperheater in a custom specified spool piece.

Characteristics and specifications of the Multi Nozzle Spray (MNS) Desuperheater / Attemperator

Design Codes ASME B16.34, ASME I, , ASME B31.1, ASME B31.3
Certification Europe – PED 2014/68/EU, Russia – CU TR, India – IBR
Piping Codes & Standards ANSI, DIN-standard, BSi British Standard, JIS or any other internationally accepted standard
Accessories Pneumatic, electric or hydraulic actuators and custom accessories can selected and mounted on top of the desuperheater.
Material - Body Various kinds of forged/pipe steel: from carbon to low/high alloy steel up to special materials such as Incoloy
Material - Spray Nozzle Forged Stainless Steel AISI 410
Pipe connections Flanged connections
Installation Position Vertical, horizontal up to 90°
Steam Flow range 500 kg/h to 500T/h
Injectionrate Over 20%
Temperature range Up to 570°C, depending on the material selection
Pressure range Up to 250 bar, depending on type and material selection
Pressure Class ANSI 150# - 2500# DIN PN 1-400
Steam pipe diameter 6” – 50”
Water side turndown ratio 45:1
Steam side turndown ratio Determined by the minimum steam velocity
Lifetime 25 years

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