GESTRA PK 40 Sample Cooler | High-Performance Steam Sampling

GESTRA PK 40 Sample Cooler | High-Performance Steam Sampling

For the safe operation of steam boilers the analysis of boiler water, boiler feedwater and condensate is of great importance. Accurate and true analytical findings require correct sampling methods and properly working analytical instruments.

A water sample can be taken from a steam boiler, a steam regenerator, a feedwater tank or a condensate receiver tank.

For example, if hot uncooled boiler water is taken from a steam boiler for analytical purposes, the risk of accidents for operating personnel will be higher and errors in the water analysis due to flashing will occur. Some of the uncooled boiler water flashes off as flash steam and, as a conse- quence, the density of the sample will appear higher and does not represent the true salt content (TDS value) of the boiler water. The increased concentration of non-volatile solids in the sample results in an incorrect water analysis and, consequently, excessive boiler blowdown. The GESTRA sample cooler PK 40 is designed to safely cool down the boiler water sample to a reference temperature of 25 °C. As a result a true sample is obtained and the TDS value, pH value and oxygen content truly corresponds to the boiler water. The PK 40 is supplied as an assembled unit ready for installation.

All continuous blowdown valves BA(E)… from GESTRA are equipped with a sampling valve to which the sample cooler PK 40 can be connected.

The pressurised boiler water, boiler feedwater and conden- sate flows through a high-pressure needle valve and through the cooling coils of the sample cooler PK 40. Completely demineralised water (make-up water) flows in the opposite direction through a ball valve and then through the housing into the cooling water discharge line of the PK 40. At maxi- mum cooling water flowrate the high-pressure needle valve reduces the amount of boiler water coming from the steam boiler until the reference temperature is reached and can be read off the water sample thermometer of the PK 40. The reference temperature is in compliance with the accredited state of the technical art. This representative boiler water sample can now be used for analysis and is drawn from the sample outlet. The sampling and the chemical analysis of the dissolved solids must be in accordance with the perti- nent rules and regulations.

PK 40 (standard):

Constructed in high-alloy stainless steel 1.4571, supplied as assembled unit ready for installation and fitted with ball valve, high-pressure needle valve and water sample thermometer. The housing is completely welded, the cooling coils cannot be removed.

PK 40 (for laboratories):

Suitable for sampling applications where the sampling point and the analysis facilities are in separate rooms (e. g. in test laboratories). Design as standard version but the unit is completely assembled, interconnected and mounted on a supporting plate.

Efficiency

1.5 kW with water samples at 200 °C

with 7 l/h sampling flowrate referered to 25 °C

The cooling capacity of the sample cooler PK 40 decreases as the temperature of the cooling water increases.

Materials

Housing and cooling coils: 1.4571 Needle valve:             1.4571

Ball valve:                       1.4408

Surface treatment

Outside: passivated and pickled

(optionally: with electropolishing) Inside: passivated and pickled

Pressure/Temperature Ratings

Max. service pressure for housing: 10 bar Max. service temperature for housing: 100 °C Max. service pressure for cooling coils: 40 bar

Max. service temperature for cooling coils: 260 °C

Mechanical connection (standard version) Sampling inlet:          Progressive ring fitting 8 mm Sampling outlet:     Tube Æ 8 x 1

Cooling water inlet: G ½ Cooling water outlet: Tube ¾” Thermometer:             G ½

Mechanical connection (version for laboratories)

Sampling IN :

progressive ring fitting 12 mm

Sampling OUT :

progressive ring fitting 12 mm Cooling water IN:              G ½ A Cooling water OUT:  G ½ A Thermometer:            G ½

Weight

approx. 8 kg

approx. 20 kg (version for laboratories)

GESTRA PK 40 Sample Cooler | High-Performance Steam Sampling

GESTRA: The Ultimate Solution for Industrial Steam & Fluid Control Systems

Introduction to GESTRA PK 40 Sample Cooler

The GESTRA PK 40 Sample Cooler is a premium industrial cooling solution designed for safe, accurate, and reliable sampling of steam and water in power plants, chemical facilities, refineries, and industrial boiler systems. Engineered in Germany with precision and durability in mind, the PK 40 ensures that high-temperature process media is cooled efficiently before analysis, protecting both personnel and sensitive measuring instruments.

If you are looking for a high-quality sample cooler with maximum reliability and long service life, the GESTRA PK 40 is the industry-proven choice trusted worldwide.

1. Precise and Reliable Sample Cooling

The GESTRA PK 40 Sample Cooler is specifically designed to reduce high-temperature steam or water samples to a safe and measurable temperature. This guarantees accurate laboratory and online analysis without altering the chemical composition of the sample.

2. Robust Stainless Steel Construction

Manufactured using high-grade stainless steel, the PK 40 offers:

  • Excellent corrosion resistance
  • Long operational lifespan
  • Optimal performance in harsh industrial environments

This makes it ideal for continuous operation in power generation and process industries.

3. Compact and Efficient Design

The compact design allows easy installation in limited spaces, while its efficient heat transfer system ensures rapid cooling with minimal cooling water consumption.

  • Designed for steam and water sampling systems
  • High thermal efficiency for consistent cooling performance
  • Durable stainless steel body
  • Low maintenance requirements
  • Easy integration into existing sampling panels
  • Engineered for industrial safety standards

The GESTRA PK 40 Sample Cooler is widely used in:

  • Power plants (coal, gas, biomass, geothermal)
  • Industrial boiler systems
  • Chemical and petrochemical industries
  • Oil & gas refineries
  • Food and beverage processing plants
  • Pharmaceutical manufacturing
  • Water treatment facilities

Its versatility makes it a critical component in any professional sampling system.

By using the GESTRA PK 40 Sample Cooler, you gain:

✔ Accurate and repeatable sample measurements
✔ Increased safety for operators
✔ Extended lifespan of analytical instruments
✔ Reduced operational risk
✔ Compliance with industrial quality standards

These benefits directly contribute to higher efficiency and lower long-term costs.

GESTRA is a globally recognized manufacturer specializing in steam and condensate management solutions. With decades of engineering expertise, GESTRA products are known for their precision, reliability, and innovation. The PK 40 Sample Cooler reflects GESTRA’s commitment to quality and performance excellence.

  • Genuine GESTRA products
  • Competitive pricing
  • Professional technical support
  • Fast response and reliable service
  • Suitable solutions for industrial and power plant applications

We help ensure you get the right sample cooler for optimal system performance.

The GESTRA PK 40 Sample Cooler is the ideal solution for industries that demand accuracy, safety, and durability in steam and water sampling. With its superior engineering, efficient cooling performance, and trusted brand reputation, it stands as one of the best sample coolers available on the global market.

👉 Contact us today to get pricing, technical consultation, or a customized solution for your sampling system.

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