Zero-loss (level-sensed) condensate drain

Capacitive sensor detects condensate level and opens a pilot-operated valve only long enough to expel liquid — no compressed air lost.

Also called: no-loss drain · capacitive level drain · electronic drain

How it works

A capacitive probe in the collection chamber signals the PCB when the chamber is full. The board energises a pilot solenoid that opens the diaphragm valve until the level probe clears, then closes before air escapes. An alarm contact is normally provided.

Coil resistance (typical, cold DC)

Typical values for the stated wattage class. Always compare against the coil tag. Open circuit = burnt winding; near 0 Ω = shorted turns.

Specifications

Alarm contact

Volt-free changeover, typically 1 A @ 250 VAC

Test button

Manual open for verification

Service

Clean probe and chamber annually; oil sludge blinds the sensor

Parts you can order

• BEKO Technologies

  BEKOMAT 31U

  BEKOMAT 31U

  $380 – $700
• BEKO Technologies

  BEKOMAT 32U

  BEKOMAT 32U

  $500 – $950
• JORC

  MINI MAG zero-loss drain

  MINI MAG

  $260 – $520
• BEKO Technologies

  BEKOMAT 14 CO

  BEKOMAT 14 CO

  $420 – $900
• nano purification

  Zero-loss condensate drain

  By model / capacity

  $250 – $600
• Kaeser

  ECO-DRAIN 31

  ECO-DRAIN 31 (order via Kaeser)

  $380 – $900
• Atlas Copco

  EWD / ED electronic water drain

  EWD 330 class — serial-driven

  $420 – $1,100
• BEKO Technologies

  BEKOMAT 16

  BEKOMAT 16 (BM16)

  $520 – $980
• BEKO Technologies

  BEKOMAT 32U

  BEKOMAT 32U

  $780 – $1,400
• Jorc

  MAG-11 zero-loss drain

  MAG-11

  $430 – $860
• Kaeser

  ECO-DRAIN 30

  ECO-DRAIN 30

  $560 – $1,100
• Atlas Copco

  EWD / ED zero-loss electronic drain

  EWD 330 family

  $600 – $1,200
• Parker (Finite / domnick hunter)

  Zero air-loss condensate drain

  PDZ / ZLD series

  $480 – $950
• Jorc

  PNEUMATIC / no-electricity zero-loss drain

  PNEUMATIC-MAG

  $420 – $890
• Generic / OEM

  Internal float drain (mechanical)

  Float drain, 1/2 in. NPT

  $25 – $120

Field test procedure

1. Press TEST: valve should open and close cleanly.
2. Sludge on the probe reads as permanently full (constant cycling) or permanently empty (no discharge). Clean the chamber first.
3. Check the alarm relay contact continuity if the machine reports a drain fault.

Symptoms & probable causes

• Alarm LED and no discharge
  Plugged inlet, frozen line, or a coated probe.
• Cycles every few seconds
  Probe fouled with oil/emulsion, or an internal seat leak.