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Pressure switch MDR F..H

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)
≤ 32 Bar
Pressure coupling

G3/8" female thread (main pressure coupling 3/8", pressure connector material = die-cast aluminium + NBR diaphragm)

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

G1/4" female thread (main pressure coupling G1/4", pressure connector material = die-cast aluminium + NBR diaphragm)

1/4" NPT female thread (main pressure coupling 1/4", pressure connector material = die-cast aluminium + NBR diaphragm)

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)

10 (4) A

max. media temperature

70°C

Motor switching capacity
0,55 kW
Protection class
IP 54, IP 65

Short Description

Control pressure switch in standard version with die-cast aluminium pressure connector and NBR diaphragm, for use with oil, water, air, etc., fitted with industrial screw clamp, optional accessories are available. Pressure difference adjustment (standard), also available with gold-plated contacts.

Applications

  • Railway technology & vehicle technology
  • Compressors
  • Agriculture
  • Mining & chemistry
  • Pumps

At a glance

  • Control pressure switch for AC voltage
  • Compressors / pumps
  • Oil, water and air
  • Pressure connector material = die-cast aluminium
  • gold-plated contacts "G" (optional) Motor switching capacity 0.55 kW
  • Cut-out pressure 32 bar
  • 1-pole (change-over)

MDR-F pressure switches are available in different versions and are suitable for universal use. Apart from the standard versions with NBR diaphragm, these pressure switches are also available with stainless steel pressure sensors, Viton® diaphragm, or as high-pressure switches with a plastic piston. Numerous approvals such as GL, VdS, and UL, plus suitability for use in intrinsically safe circuits qualify these mechanical pressure switches for a wide range of applications and fields. 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. The standard version of the pressure switch MDR-F..H is fitted as standard with the possibility for pressure difference adjustment. Two adjusting screws (P1 und 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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