Condor MDR1/11 pressure switch for 230 V piston compressors 230/50 V/Hz · 2 poles · max. 11 bar · factory set to 8,0–10,0 bar
Code: MDR1/11
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Product detailed description
The single-phase Condor that switches motors up to 4.0 kW — the strongest 230 V switch in the range. And the only one with the unloader valve already as standard, so after shut-off it releases the pressure between the head and the non-return valve by itself.
Why it is stronger than the MDR 2
Nobody would guess it from the names, but the MDR 1 is stronger than the MDR 2: 4.0 kW against 2.2 kW. The number after the letters is the product series, not a ranking by power.
The second difference is the unloader valve. Without it the motor starts against the remaining compressed air, and on stronger single-phase machines that is a common reason a compressor will not pick up.
What is in the box
- Protection IP 44 — against objects over 1 mm and splashing water.
- Mechanical life over half a million operations, at most 120 operations an hour.
- Rotary knob for switching on and off by hand.
- Air temperature −5 to +80 °C.
- Switching capacity 4,0 kW at 230 V to EN 60947.
- AEV 1S unloader valve as standard — it releases the remaining pressure from the head after shut-off.
- Connection 3/8" + 3× 1/4" — one inlet and three outlets on a single block.
- Factory set to 8,0–10,0 bar; the screws under the cover change it.
How it differs from its siblings
The weaker single-phase Condor is MDR2/11, which also arrives at a different setting. Simpler and cheaper single-phase switches are TS220 and BW-0002. For three-phase machines every version from MDR3/11X-6A onwards applies.
Ventilek recommends
When a single-phase compressor will not pick up, it is usually leftover pressure in the head. The unloader valve settles that for you.
Technical data follow the maker datasheet and the supplier catalogue. The switch must be connected by a person with the appropriate electrical qualification. The pressure is set under pressure and with the electrical supply disconnected.
Additional parameters
| Category: | Pressure switches for compressors: Condor and NE-MA |
|---|---|
| Connecting: | 3/8" + 3 × 1/4" |
| Poles: | 2 |
| Switching voltage: | 230/50 V/Hz |
| In stock: | External warehouse |
| Minimum pressure: | 6.0 bar |
| Maximum pressure: | 10 bars |
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Condor: German precision in pressure control since 1893
In the world of compressors and pumps, the Condor brand is a byword for uncompromising quality, safety and technical excellence. As the inventor of the automatic pressure switch, this German family business with more than 130 years of tradition has grown into the world leader in its field.
History and innovation
The company was founded in 1893 by August Frede. Although it started out making centrifuges and milking machines, the decisive turning point came in 1935, when Condor was granted the world's first patent for an automatic diaphragm switch for pumps. That moment defined the brand's course as a pioneer in pressure control.
Why choose Condor components?
Condor pressure switches (above all the legendary MDR series) are now the standard relied on by respected compressor manufacturers all over the world.
- Extreme service life: Condor products undergo demanding tests (salt spray or water hammer tests, for example) that confirm their exceptional durability.
- Safety and certification: Production takes place in Germany to the strictest standards. Condor holds ISO 9001 certification and numerous international approvals, including versions for explosive atmospheres (ATEX).
- A wide range of uses: From small single-phase compressors (the MDR-1 and MDR-2 series) to powerful industrial machines that require motor overcurrent protection (MDR-3, MDR-5).
A legend called MDR
The MDR name has been on the market for more than 80 years. These switches stand out for their rugged design, high switching accuracy and the option of setting the cut-in and cut-out pressure individually. Thanks to integrated unloader valves they also let the electric motor start easily, with no back pressure.
If you are looking for the best that German engineering has to offer for your compressor or air line, Condor is a safe bet that will repay you with trouble-free operation for many years.