Reliable sealing performance is one of the most critical requirements in thermal oil systems. High fluid temperatures, gas formation, and demanding operating conditions can significantly affect pump performance and seal reliability. The Dickow NKX was specifically developed to address these challenges.

The NKX combines a mechanical seal with a patented fully automatic cooling and degassing system that operates without the need for external support systems. The technology ensures a continuous supply of cooled and de-aerated thermal oil to the seal area, helping maintain optimal operating conditions.

How the Dickow NKX Works

During operation, specially designed grooves on the shaft sleeve transport thermal oil into an integrated gas separator. Within the separator, gas and liquid phases are automatically separated.

The de-aerated thermal oil then passes through a cooling section where heat is removed from both the seal chamber and bearing area. An axial fan mounted on the shaft further enhances cooling performance and helps maintain low bearing temperatures.

The conditioned thermal oil continuously supplies the mechanical seal and circulates within the system. Meanwhile, separated gases are returned to the pump casing through a conveying thread and reintroduced into the main flow.

The result is a permanently operating closed-loop system that supports reliable and stable pump performance.

Key Benefits of the Dickow NKX

• Patented cooling and degassing technology
• Continuous supply of de-aerated thermal oil to the mechanical seal
• Enhanced protection against dry running conditions
• Reduced thermal stress on seals and bearings
• Fully automatic operation without external cooling or barrier systems
• Increased operational reliability in thermal fluid and hot oil applications

Video: How the Dickow NKX Works

Our latest animation explains the operating principle of the Dickow NKX and demonstrates how cooling, degassing, and mechanical seal protection are combined in an integrated closed-loop system.

Dickow Pumps has been delivering reliable pumping solutions for demanding applications in process industries, energy systems, chemical processing, petrochemicals, and decarbonization projects for decades. The NKX represents our commitment to operational reliability, engineering excellence, and long-term performance.

Liquid sulphur: Technical challenges and solutions

Liquid sulphur is indispensable across industries – yet its transfer is one of the most demanding challenges in process engineering. Even minor temperature fluctuations can lead to blockages, leaks or unplanned shutdowns. In our article published in Sulphur Magazine, we explain why only a holistic system approach ensures reliable operation – and how magnetic drive and submersible pumps contribute to maximum safety.

Liquid sulphur is a critical industrial feedstock, but its safe transfer is technically demanding. Alexander Hammer of Dickow Pumpen argues that reliable handling depends on a whole-system approach – integrating heating, piping, sealing, and operating procedures – with magnetic drive pumps highlighted as the safest option for leak-free transfer and submersible pumps as a strong fit for tank and storage applications.

IFAT in Munich is regarded as the world’s leading trade fair for environmental technologies – and this year once again confirmed its status as an international industry gathering. With around 142,000 visitors, 3,400 exhibitors from 60 countries and an exhibition area of 300,000 square metres, it provided an impressive platform for innovations in the fields of water, wastewater, recycling and sustainable urban development.

Under the motto ‘Innovations for a sustainable future – Made in Bavaria’, numerous Bavarian companies also showcased their work at the bayme vbm joint stand. The aim was to provide a strong platform, particularly for small and medium-sized enterprises, to forge contacts and tap into new markets.

In a recent technical article in *Chemical Engineering* magazine entitled ‘Robust Pumps Provide Greater Reliability’ by Joy LePree, which explores pump technology in chemical process engineering, key challenges such as aggressive media, the highest safety requirements and the desire for maximum plant availability are examined. Drawing on several interviews, including one with Alexander Hammer, Managing Director of Dickow Pumpen, the author examines how robust pump designs, seal-less magnetic drive pumps and intelligent monitoring systems contribute to greater operational reliability and predictable maintenance.

Creating Reliable Framework Conditions Instead of Trade Barriers: Dickow Pumpen in Dialogue with Member of Parliament Stephan Mayer

Business and politics in discussion on the competitiveness of mechanical engineering: Open markets instead of new barriers.

Dickow Pumpen GmbH & Co. KG discussed the implications of new trade barriers for the mechanical engineering sector with Member of Parliament Stephan Mayer (CSU). The meeting was initiated by a letter from Managing Director Alexander Hammer addressing the impact of U.S. tariffs on steel and aluminium derivatives. This was followed by an on-site visit to Waldkraiburg in early January. Discussions focused on the competitiveness of export-oriented medium-sized companies, additional tariffs and documentation requirements, as well as weakening market dynamics in European sales markets – particularly within the chemical industry.

Mission Decarbonization: How Dickow Pumpen enables the ramp-up of Sustainable Aviation Fuels

Aviation is under pressure: climate targets, rising costs, and dependence on fossil fuel supply chains demand new solutions. Sustainable Aviation Fuels (SAF) are considered key to decarbonization – provided they can be integrated into the infrastructure safely and economically. This is precisely where Dickow Pumpen's HZM series comes in.