ZM Series Modular Zero Air Loss Condensate Drains
Serviceable in minutes. Sealed for years.
Level-sensed electronic drains built on a modular chassis. A level sensor triggers discharge on demand and the valve closes while liquid still seals the port, so no compressed air escapes. Sensor, controller and valve lift out separately, the tank carries its own air-balance port, and every model reports a fault on two volt-free contacts at once.
Models: ZM-10E to ZM-600V · 9 models · Condensate management
- 0 % Compressed air loss
- 16 bar Max working pressure
- 600 m³/min top capacity
- 2 Alarm contacts, N.O. + N.C.
Key specifications
| Working pressure | 0 – 16 bar |
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| Condensate temperature | +1 to +60 °C |
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| Top capacity | 600 m³/min |
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| Air lost per discharge | None — closes under liquid |
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| Alarm contacts | N.O. and N.C., volt-free |
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| Protection | IP 65 |
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| Supply | 24 V AC/DC, 110 V AC, 220 V AC |
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| Models | 9, from ZM-10 to ZM-600V |
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Why this range
- Valve closes under a water seal — no purge, no over-run, no blow-by
- Three modules — controller, sensor, valve — each replaceable on site without removing the drain
- Machined air-balance port from ZM-25 upwards prevents air-lock
- Self-cleaning discharge mode, then alarm on N.O. + N.C. volt-free contacts
- V models with translucent tank show the condensate level across the plant room
Models and technical data
The range
| Model | Character | Compressor | Dryer | Filter | Discharge | Weight | Typical duty |
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| ZM-10E | Economy | 10 | 20 | 100 | 12 L/h | 0.6 kg | Filters, small dryers — no alarm |
| ZM-10 | Modular | 10 | 20 | 100 | 12 L/h | 0.6 kg | Filters, small dryers, point drains |
| ZM-25 | General purpose | 25 | 50 | 250 | 30 L/h | 1.2 kg | Coolers, separators, receivers |
| ZM-50 | Cast tank | 50 | 100 | 500 | 65–70 | 2.1 kg | Aftercoolers, heavy slug loading |
| ZM-100 | Cast tank | 100 | 200 | 1000 | 90–100 | 2.3 kg | Larger plant rooms, central dryers |
| ZM-50V | Visible level | 50 | 100 | 500 | 65–70 | 2.6 kg | As ZM-50, level visible |
| ZM-100V | Visible level | 100 | 200 | 1000 | 90–100 | 2.9 kg | As ZM-100, level visible |
| ZM-200V | High volume | 200 | 400 | 2000 | 200–240 | 3.2 kg | Large receivers, multi-compressor |
| ZM-600V | Very high volume | 600 | — | — | 480–560 | 8.0 kg | Central plant, air separation |
Model number = recommended compressor capacity in m³/min. V = visible level tank.
Technical data — standard models
| Parameter | ZM-10E | ZM-10 | ZM-25 | ZM-50 | ZM-100 |
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| Character | Economy | Modular | General | Cast tank | Cast tank |
| Working pressure | 0–16 bar | 0–16 bar | 0–16 bar | 0–3 / 3–16 bar | 0–3 / 3–16 bar |
| Max. discharge volume | 12 L/h | 12 L/h | 30 L/h | 70 / 65 L/h | 100 / 90 L/h |
| Compressor capacity | 10 m³/min | 10 m³/min | 25 m³/min | 50 m³/min | 100 m³/min |
| Refrigeration dryer | 20 m³/min | 20 m³/min | 50 m³/min | 100 m³/min | 200 m³/min |
| Filter capacity | 100 m³/min | 100 m³/min | 250 m³/min | 500 m³/min | 1000 m³/min |
| Inlet | R½" vertical | G½" vertical | G¾" vert./horiz. | G¾" | G¾" |
| Outlet | Ø8 (G¼") | Ø8 (G¼") | Ø8 (G¼") | Ø10 (G½") | Ø10 (G½") |
| Air-balance port | — | — | G¼" | G¼" | G½" |
| Strainer mesh | External | External | External | Built-in + ext. | Built-in + ext. |
| Tank material | Aluminium + PA | Aluminium | Aluminium | Aluminium | Aluminium |
| Alarm output | — | N.O. + N.C. | N.O. + N.C. | N.O. + N.C. | N.O. + N.C. |
| Dimensions L×W×H | 124×60×123 | 93×79×124 | 185×74×128 | 177×110×147 | 207×110×147 |
| Net weight | 0.6 kg | 0.6 kg | 1.2 kg | 2.1 kg | 2.3 kg |
Technical data — visible level (V) models
| Parameter | ZM-50V | ZM-100V | ZM-200V | ZM-600V |
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| Working pressure | 0–3 / 3–16 bar | 0–3 / 3–16 bar | 0–3 / 3–16 bar | 0–3 / 3–16 bar |
| Max. discharge volume | 70 / 65 L/h | 100 / 90 L/h | 200 / 240 L/h | 480 / 560 L/h |
| Compressor capacity | 50 m³/min | 100 m³/min | 200 m³/min | 600 m³/min |
| Refrigeration dryer | 100 m³/min | 200 m³/min | 400 m³/min | — |
| Filter capacity | 500 m³/min | 1000 m³/min | 2000 m³/min | — |
| Inlet | G¾" | G¾" | G¾" | G¾" |
| Outlet | Ø10 (G½") | Ø10 (G½") | Ø12 (G½") | G½" |
| Air-balance port | G½" | G½" | G½" | G¾" |
| Tank material | Aluminium + translucent composite | | | |
| Strainer mesh | Built-in mesh + external strainer | | | |
| Alarm output | N.O. + N.C. volt-free, max. 62.5 VA AC / 60 W DC | | | |
| Dimensions L×W×H | 197×110×143 | 186×110×173 | 186×110×238 | 229×176×292 |
| Net weight | 2.6 kg | 2.9 kg | 3.2 kg | 8.0 kg |
Manual, timer and level-sensed drains compared
| Manual valve | Timer solenoid | Level-sensed ZM Series |
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| Air lost | Continuous, if left cracked open | Every time it fires | None |
| Discharges when | Someone remembers | The clock says so | There is liquid to discharge |
| If it blocks | Nobody knows | Nobody knows | Alarm contact changes state |
| Typical cost of air lost | Large and invisible | 1 – 3 % of compressor output | Nil |
| Maintenance | None until it fails | Clean the orifice | Modules lift out separately |
Where it is used
- Aftercoolers and cyclone separators
- Air receivers
- Refrigerated and adsorption dryers
- Coalescing filter bowls
- Drip legs and low points
Request offer and sizing