Condensate drains for compressed air systems

Our products

How an automatic condensate drain works

How an electronic condensate drain works

Frequently asked questions about condensate drains

Compressed air condensate drains

When compressed air is treated and distributed, condensate is produced at various points in the system. This occurs in the compressor, during filtration and drying. To prevent it from entering the compressed air line, condensate drains collect the polluted and environmentally harmful liquid. Accordingly, condensate drains have a major influence on compressed air quality and energy costs.

Our products

Condensate drains from FST keep energy consumption and costs as low as possible. Whether electronic, automatic, time-controlled or manual, FST sells condensate drain types for different compressed air applications and performance ranges. Condensate drainage is safe and efficient.

Condensate drain CDF – automatic & zero-loss

Automatischer Kondensatableiter der Baureihe CDF von Firma FST

The CDF automatic condensate drains remove condensate from the compressed air chain completely without losses. As standard, our customers combine these float traps with compressed air filters [link (internal): compressed air filters] in the wet area – i.e. in the area upstream of the compressed air dryer.

For small filter housings, these compressed air condensate drains can be mounted inside the filter housing to save space. For larger filter housings, they are mounted externally, below the filter housing.

Nom. volume flow

800–20.000 m³/h

Max. operating pressure

16 bar

Connection

M14; G ½”

To product data sheet

Condensate drain CDE-L – electronically level-controlled & zero-loss

Elektronischer Kondensatableiter CDE der Firma FST

Our innovative, electronically level-controlled condensate drain CDE-L goes one step further: It automatically and continuously monitors the condensate produced and discharges it completely loss-free.

This advanced condensate separator is equipped with an electronic drain valve, level sensor, alarm function, automatic cleaning function and other practical features as standard.

Nom. volume flow

250–30.000 m³/h

Max. operating pressure

16 bar

Connection

G ½”–G 1”

Voltage

230 V, 50–60 Hz

To product data sheet

Condensate drain CDE-T – electronically & time-controlled

Automatische Kondensatableiter CDE-T der Firma FST

Practical, even with operating pressures above 16 bar, our CDE-T time-controlled condensate drain separates condensates from the compressed air in fixed cycle and valve opening times. Drains of this series are usually connected externally to the condensate outlet of the compressed air filter or pressure vessel.

Nom. volume flow

2.500–48.000 m³/h

Max. operating pressure

16–500 bar

Connection

G ¼”–G 1”

Voltage

230 V, 50–60 Hz

To product data sheet

Condensate drain CDM – manual & reliable

Manuelle Kondensatableiter CDM der Firma FST GmbH

Our manual condensate drain CDM, is a simple drain valve that is operated by hand. Today, so-called manual drains are mainly used for venting pressurised housings or for manual moisture control in places without condensate.

FST manual condensate drains have a particularly slow opening behaviour. This prevents injuries caused by compressed air escaping abruptly.

Max. opearting pressure

16–350 bar

Connection

M14–G 1”

To product data sheet

Are you looking for a condensate drain made of stainless steel, for higher operating pressures or with different connections? Before deciding on a condensate drain for compressed air treatment, our experts will be happy to advise you personally.

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See Operating Manuals

All product data sheets

Prices for condensate drains

Working principle of condensate drains for compressed air systems

Different types of condensate drains have different functions. Below, we explain the function of the automatic condensate drain CDF140, and the electronic condensate drain CDE-L.

How an automatic condensate drain works

With the automatic condensate drain of the FST series CDF140, a float rises or sinks depending on the level in the condensate collection chamber. This opens or closes a mechanical drain valve. This way, the condensate is drained off.

Advantages & features

As an automatic condensate drain for compressed air, the CDF140 does not require electricity. Large cross-sections prevent blockages due to particle accumulation and reduce turbulence of the condensate.

[Translate to English:] Schaubild Funktionsweise automatischer Kondensatableiter

[Translate to English:] Schaubild Funktion automatischer Kondensatablass

How an electronic condensate drain works

With the CDE-L electronic condensate drain, the mode of operation is different.

This advanced condensate separator is connected to the condensate outlets of the pressurised housing from the outside. The condensate flows into a stainless steel collection chamber where it is stored. An electronically controlled sensor then monitors the level and activates the drain valve at a predetermined level. The condensate then flows off.

As soon as the sensor at the bottom of the collection chamber no longer detects any liquid, the valve closes – without releasing valuable compressed air into the environment.

Advantages & features

Regardless of whether the condensate consists of oil or water, no calibration of the level sensor is necessary. In case of error messages, the innovative system emits an alarm – in some models even under dry contact. In addition, an integrated dirt sieve prevents blockages.