Multitech Engineers
Condensate Treatment

Automatic Condensate Drains & Compressed Air Filters

Condensate accumulates at various points in the compressed air system, including bulk liquid separators, air receivers, refrigerated and deliquescent dryers, coalescing filters, and drip legs. This liquid must be regularly removed from the system to prevent harmful carryover. Automating this task improves system reliability. When selecting an automatic condensate drain, factors to consider are resistance to clogging or fouling, initial cost, utility requirements, and air loss (a measure of energy efficiency).

Internal Mechanical Float Drain

This drain fits within the housings of liquid separators and coalescing filters. When the liquid level within the housing rises to a set point, a float within the drain unseats from an orifice, allowing accumulated liquid to exit.


As the liquid level decreases the float re-seats on the orifice, stopping further liquid from leaving the housing. These drains are generally low cost and do not purge compressed air. Their drain orifices are susceptible to blockage and require regular cleaning.

External Mechanical Float Drain

This drain attaches to the exterior of the device being drained. The drain contains a liquid reservoir and a float. When the liquid level within the reservoir rises to a set point the float lifts, either unseating from a drain orifice or releasing air pressure from a diaphragm allowing liquid to exit. These drains exhibit no air loss but do require consistent maintenance to prevent blockages.

Ball Valve Timer Drain

This unit consists of an electric actuator with an adjustable timer and a ball valve. Compressed air is normally exhausted when the device actuates. A strainer is usually not needed

Electronic Level Sensing Drain

This device uses a capacitance senor within a liquid reservoir to control a solenoid and diaphragm valve. No compressed air is lost when the device actuates. Some models include an integral strainer to prevent blockage. Some models include fault and/or maintenance indicators.

Pneumatic Level Sensing Drain

This drain uses a mechanical float within a reservoir to control a pneumatic cylinder connected to a ball valve. No compressed air is lost when the device actuates. No strainer is required.

Compressed Air Filters

PRE FILTER

High-efficiency particulate filters for dust protection. Count Efficiency: 99,97 % at Most Penetrating Particle Size (MPPS = 0,06 micron).

FINE FILTER

Particulate filters for dust protection. Count Efficiency: 99,81 % at Most Penetrating Particle Size (MPPS = 0,1 micron).

CARBON FILTER

Activated carbon filter for removal of oil vapour an hydrocarbon odors with a maximum remaining oil content of 0,003 mg/m? (0,003 ppm). 1000 hour lifetime.