Water dischargers are components that automatically remove condensate - collected water - from steam and compressed air systems. This makes them an essential part of any efficient steam system. When steam condenses, it creates water that must be drained away to avoid energy loss, damage and disruption. A water discharger handles this task automatically and without the need for manual operation.

What is a water discharger?

A water discharger is a type of valve used to ensure that steam systems function optimally. It ensures that condensate is continuously removed without losing valuable steam. Water dischargers differ from regular valves in that they react to changes in pressure, temperature and density - and thus know when to open and close.

This function is particularly important in industrial installations where steam is used for heating, sterilisation or energy transfer, for example. Without effective condensate removal, you risk both energy waste and mechanical problems. With a water discharger in the system, pressure is maintained and components are protected against corrosion and water hammer.

How a water discharger works

A water discharger distinguishes between vapour and condensate using physical properties such as temperature and density. When condensate is detected, the discharger opens and drains the water away. When vapour is detected again, it closes automatically. This process happens continuously, without the need for electrical control or human intervention.

The system is simple and robust. By automatically reacting to changes in the medium, the discharger ensures that the steam quality in the system is always correct - and that condensate is never allowed to build up in pipes, valves or equipment.

Several types of water dischargers

There are several different types of water dischargers and the choice depends on the application, system pressure and operating conditions. The most common types are:

• Thermodynamic water dischargers
  Compact and robust. Suitable for high pressures and demanding conditions. Operates using pressure differences and changes in media velocity.
• Thermostatic water dischargers
  Responds to temperature differences. Ideal for systems with varying loads and low differential pressure. Provides smooth and controlled discharge.
• Mechanical water dischargers
  Works with floats or bellows mechanisms that respond to the liquid level in the discharger. Particularly suitable for high condensate volumes and stable operating modes.

Each type has its advantages, and it's important to choose the right one to achieve optimal operation and minimise energy loss.

Importance of proper water discharge

Efficient condensate removal is not just about energy optimisation - it's also about safety, lifetime and reliability. If condensate is allowed to accumulate in the system, it can lead to:

• Pressure drop and reduced efficiency
  Accumulated water in pipes and valves reduces system capacity and increases energy consumption.
• Corrosion and equipment damage
  Water in contact with metal leads to corrosion and damage to critical components over time.
• Water hammer and unplanned downtime
  Sudden changes in pressure caused by water pockets can damage valves, pumps and other parts of the system.

A properly sized and installed water discharger prevents these problems and ensures that the steam can be utilised efficiently and safely.

Alflow's solutions

At Alflow, we offer a range of high-quality water dischargers to suit many different types of steam systems and operating conditions. Whether you need a compact and durable solution for high pressure or a temperature-sensitive discharger for varying loads, we'll help you find the right one.

We don't just offer products - we also offer advice. Our experts have extensive experience in steam engineering solutions and will help you with:

• Choosing the right discharger for your application
• Optimise existing systems for better energy efficiency
• Ensure compliance with documentation and hygiene requirements - especially in food and pharma production

We understand the challenges that come with vapour and condensate - and we know how to prevent them.

FAQ

What is a water discharger?
A water discharger is an automatic valve that removes condensate (water) from steam systems without letting steam escape. It ensures energy efficiency, protects equipment and prevents operational disturbances.

How does a water separator work?
A water separator separates water from steam or compressed air using physical principles such as centrifugal force or filtration. It prevents moisture from reaching sensitive components.