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Pressure switch MDR 4 SU

Technical specifications

Medium
Air, Water
Voltage type
Three-phase current (A.C.)
Type
Electro-mechanical
Voltage
≤ 400 V
Contact function
3 NO contacts
Gold-plated contacts
no
Pressure adjustment
Pressure difference adjustment (standard)
Pressure range (bar)
≤ 16 Bar
Pressure coupling

G1/2" aluminium female thread (main pressure coupling G1/2", pressure connector material = die-cast aluminium)

Overload relay
not possible
Cable entry gland

with 2 x WN (sealing grommet) (accessory PG 11 - 13.5)

Relief valve
without (accessory EV, AEV)
Mechanical On/Off (EA)
no
Rated frequency
50 Hz / 60 Hz
Rated operating current (Ie)

-

max. media temperature

80°C

Motor switching capacity
4,0 kW
Protection class
IP 44

Short Description

The high-performance pressure switch for switching motors (compressors and pumps). Version "SU" of the MDR 4 is fitted with an "NO" contact function.

Applications

  • Compressors
  • Pumps
  • Engine technology
  • Agriculture

At a glance

  • High-performance pressure switch for 3-phase voltage
  • for compressors / for pumps
  • Pressure connector material = die-cast aluminium
  • 3-pole (NO)
  • Motor switching capacity 4 kW
  • max. cut-out pressure 16 bar

Its robust and hard-wearing design ensures a long service life, also under high loads. The MDR-4SU pressure switch is fitted as standard with the possibility for pressure difference adjustment. Two adjusting screws permit switching point and hysteresis to be adjusted, whereby the cut-out point is first adjusted via the main pressure spring and then the cut-in point via the pressure difference setting. By selecting a pair of values for cut-in and cut-out pressures, an intersection point is determined in the diagram. If the point lies within the shaded area, this pair of values can be adjusted on the pressure switch. If the point lies outside the shaded area, this pair of values cannot be adjusted on the pressure switch.

Cable entry gland PG 13.5v for pressure switch MDR 4

Cable entry gland PG 13.5v for pressure switch MDR 4

Cable entry gland PG 13.5v for pressure switch MDR 4
Mounting bracket MW 4 for pressure switch MDR 4

Mounting bracket MW 4 for pressure switch MDR 4

Mounting bracket MW 4 for pressure switch MDR 4
Angled unloader valves EV 4w and EV 4wi for pressure switch MDR 4

Angled unloader valves EV 4w and EV 4wi for pressure switch MDR 4

Angled unloader valves EV 4w and EV 4wi for pressure switch MDR 4
Sealing grommet WN for pressure switch MDR 4 cable entry gland

Sealing grommet WN for pressure switch MDR 4 cable entry gland

Sealing grommet WN for pressure switch MDR 4 cable entry gland
Cable entry gland with tension relief & kink protector PG 13.5 ZK for pressure switch MDR 4

Cable entry gland with tension relief & kink protector PG 13.5 ZK for pressure switch MDR 4

Cable entry gland with tension relief & kink protector PG 13.5 ZK for pressure switch MDR 4
Threaded coupling PG-G for pressure switch MDR 4 cable entry gland

Threaded coupling PG-G for pressure switch MDR 4 cable entry gland

Threaded coupling PG-G for pressure switch MDR 4 cable entry gland
Cable entry gland with tension relief PG 13.5z for pressure switch MDR 4

Cable entry gland with tension relief PG 13.5z for pressure switch MDR 4

Cable entry gland with tension relief PG 13.5z for pressure switch MDR 4
Starting unloader valve EV 4s with quick-release coupling for pressure switch MDR 4

Starting unloader valve EV 4s with quick-release coupling for pressure switch MDR 4

Starting unloader valve EV 4s with quick-release coupling for pressure switch MDR 4
Angled unloader valve with quick-release coupling EV 4ws for pressure switch MDR 4

Angled unloader valve with quick-release coupling EV 4ws for pressure switch MDR 4

Angled unloader valve with quick-release coupling EV 4ws for pressure switch MDR 4
Entlastungsventil EV 4 für Druckschalter MDR 4

Entlastungsventil EV 4 für Druckschalter MDR 4

Entlastungsventil EV 4 für Druckschalter MDR 4
Anlaufentlastungsventil AEV 4ws für Druckschalter MDR 4

Anlaufentlastungsventil AEV 4ws für Druckschalter MDR 4

Anlaufentlastungsventil AEV 4ws für Druckschalter MDR 4
Starting unloader valves AEV 4w and AEV 4wi for pressure switch MDR 4

Starting unloader valves AEV 4w and AEV 4wi for pressure switch MDR 4

Starting unloader valves AEV 4w and AEV 4wi for pressure switch MDR 4
Starting unloader valve AEV 4s for pressure switch MDR 4

Starting unloader valve AEV 4s for pressure switch MDR 4

Starting unloader valve AEV 4s for pressure switch MDR 4
Starting unloader valve AEV 4 for pressure switch MDR 4

Starting unloader valve AEV 4 for pressure switch MDR 4

Starting unloader valve AEV 4 for pressure switch MDR 4

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