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Pressure switch MDR F…UL

Technical specifications

Medium
Air, Water
Voltage type
Alternating current (AC) – single-phase
Type
Electro-mechanical
Voltage
≤ 250 V
Contact function
1 change-over contact
Gold-plated contacts
optional
Pressure adjustment
Pressure difference adjustment (standard)
Pressure range (bar)
≤ 250 Bar
Pressure coupling

MDR-F..H S..UL version with die-cast aluminium pressure connector + NBR diaphragm, G3/8" female thread (1/4" NPT thread on request), with industrial screw clamp;

MDR-F..HH..UL high-pressure switch up to 3625 psi with plastic piston as pressure sensor element + stainless steel coupling and die-cast aluminium pressure connector, pressure coupling G3/8" female thread with restrictor, and industrial screw clamp;

MDR-F...H...UL - version for vacuum monitoring, with die-cast aluminium pressure connector, pressure coupling G1/4" female thread, and industrial screw clamp

Overload relay
not possible
Cable entry gland

with 1 x WN (sealing grommet)

(accessory M20)

Relief valve
no EV or AEV possible
Rated frequency
50 Hz / 60 Hz
Rated operating current (Ie)

15 A

max. media temperature

70°C

Motor switching capacity
0,55 kW
Protection class
IP 65

Short Description

Control pressure switch as UL version (standard version, as high-pressure switch, and for vacuum monitoring), specially designed for the North American market, and approved by Underwriters Laboratories Inc. (UL).

Applications

  • Mining & chemistry
  • Compressors
  • Pumps
  • Fire protection & extinguishing systems
  • Agriculture
  • Railway technology & vehicle technology

Certicates & Permits

  • UL -Listed

At a glance

  • Control pressure switch for AC voltage
  • for pumps / for compressors
  • UL-approved for North American market
  • Die-cast aluminium or plastic piston as pressure sensor element & stainless steel coupling
  • IP 65
  • gold-plated contacts "G" (optional)
  • Motor switching capacity 0.55 kW
  • Cut-out pressure ≤250 bar
  • 1-pole (change-over)

MDR-F pressure switches are available in different versions and are suitable for universal use. Depending on version, they are used for monitoring and control of pressure in liquids and gases, for process control tasks, for pressure monitoring in cooling & lubrication systems and for automatic switching of compressor and pump motors. MDR-F..UL pressure switch (standard version, as high-pressure switch, and for vacuum monitoring), specially designed for the North American market, and approved by Underwriters Laboratories Inc. (UL).

The pressure switch MDR-F..UL is fitted as standard with the possibility for pressure difference adjustment. Two adjusting screws (P1 and P2) permit switching point and hysteresis to be adjusted, whereby the cut-out pressure is adjusted with screw P1. Pressure difference and thereby the cut-in point is adjusted with screw P2. 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.

Because of the wide range of pressure switch versions, please contact us if you have questions on a special application or have technical requirements. As a manufacturer of pressure switches and controls, we offer a wide range of services, including standard and customer-specific solutions for individual applications.

MDR F M20 K

MDR F M20 K

MDR F M20 K
MDR F M20 M

MDR F M20 M

MDR F M20 M
MDR F D-32

MDR F D-32

MDR F D-32
MDR F D-+32

MDR F D-+32

MDR F D-+32
MDR-F hood

MDR-F hood

MDR-F hood
MDR-F hood R

MDR-F hood R

MDR-F hood R
MDR-F hood, alum.

MDR-F hood, alum.

MDR-F hood, alum.
MDR F RT-1

MDR F RT-1

MDR F RT-1

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