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Differential pressure switch LGW A2 Dungs for air, flue and exhaust gases

Pressure switch LGW A2 Dungs
  • These pressure switches LGW A2, LGW A2P, LGW A2-7 are designed for monitoring in firing, ventilation and air-conditioning systems.
  • Suitable for switching a circuit on, off or over on changes in actual pressure value relative to the set reference value. The reference value (switching point) is adjusted on a setting wheel provided with a scale.
  • The LGW ... A2P version has a test button integrated in the lower part.
  • LGW A2, A2P: maximum operating pressure: 500 mbar, setting ranges between 0.4÷150 mbar. Ambient and medium temperature -15÷70oC, storage temperature -30÷85oC.
  • LGW A2-7: maximum operating pressure: 100 mbar, setting ranges between 0.2÷30 mbar. Ambient and medium temperature -15÷85oC, storage temperature -30÷85oC.
  • Switching voltage: DC gold contacts 5÷24 V, silver contacts 24÷48 V; AC 24÷250 V. Nominal current: DC 20 mA - Au; AC 10 A - Ag for LGW … A2, A2P (AC 6 A for LGW … A2-7).
  • The installation position can change the switching pressure with up to 0.5 mbar.
  • Suitable for air, flue and exhaust gases and other non-aggressive gases; non suitable for industrial combustion gases.
  • Detailed pictures for available models (move the mouse over them to zoom):
Pressure switch LGW 3 A2 Pressure switch LGW 10 A2 Pressure switch LGW A2P


Functional description LGW A2:

The differential pressure acts via the diaphragm against the force of the setting spring on the microswitch. The pressure switch operates without auxiliary power.
 
  • Differential pressure switch LGW ... A2:
The control unit responds to differential pressure. If the set reference value (mbar) is exceeded or undershot, the circuit is switched on, off or over.
 
  • LGW ... A2P, test button:
The LGW A2P differential pressure switch is equipped with a test button. The Test button permits a service-friendly check of the safety function. If the test key is pressed while the pressure exists, the connection to the pressure connection G 1/4 is interrupted and the pressure under the diaphragm is released. The microswitch of the pressure switch changes the contact position from NO to NC. If the test button is released, the pressure below the diaphragms is built up again and the microswitch changes to its original position.


Technical specifications LGW A2 pressure switches

Pressure switch type Code Setting range (mbar) pmax (mbar) Scale Degree of protection Δpmax (mbar) Contact material
Pressure switch LGW 3 A2 107409 0.4 ÷ 3.0 500 mbar IP 54 ≤0.3 Ag
Pressure switch LGW 10 A2 107417 1.0 ÷ 10 ≤0.5
Pressure switch LGW 50 A2 107425 2.5 ÷ 50 ≤1.5
Pressure switch LGW 150 A2 107433 30 ÷ 150 ≤5
Pressure switch LGW 3 A2 218444 0.4 ÷ 3.0 500 mbar IP 54 ≤0.3 Ag
Pressure switch LGW 10 A2 222025 1.0 ÷ 10 ≤0.5
Pressure switch LGW 50 A2 222024 2.5 ÷ 50 ≤1.5
Pressure switch LGW 3 A2P 120204 0.4 ÷ 3.0 500 mbar IP 54 ≤0.3 Ag
Pressure switch LGW 10 A2P 120212 1.0 ÷ 10 ≤0.5
Pressure switch LGW 50 A2P 221207 2.5 ÷ 50 ≤1.5
Pressure switch LGW 150 A2P 120238 30 ÷ 150 ≤5

 

Pressure switch type Code Setting range (mbar) pmax (mbar) Scale Degree of protection Δpmax (mbar) Contact material
Pressure switch LGW 3 A2 206010 0.4 ÷ 3.0 500 Pa IP 54 ≤0.3 Ag
Pressure switch LGW 10 A2 214383 1.0 ÷ 10 ≤0.5
Pressure switch LGW 50 A2 215938 2.5 ÷ 50 ≤1.5
Pressure switch LGW 3 A2 211075 0.4 ÷ 3.0 500 Pa IP 54 ≤0.3 Au
Pressure switch LGW 10 A2 217465 1.0 ÷ 10 ≤0.5
Pressure switch LGW 50 A2 203370 2.5 ÷ 50 ≤1.5
Pressure switch LGW 1,5 A2-7 257434 0.2 ÷ 1.5 100 Pa IP 54 ≤0.18 Au
Pressure switch LGW 3 A2-7 257435 0.2 ÷ 3.0 ≤0.20
Pressure switch LGW 6 A2-7 257437 0.3 ÷ 6.0 ≤0.30
Pressure switch LGW 10 A2-7 257436 1.0 ÷ 10 ≤0.40
Pressure switch LGW 30 A2-7 257438 2.0 ÷ 30 ≤0.80


Dimensions LGW A2 (mm)

Differential pressure switches LGW A2 / LGW A2-7:
dimensions LGW A2-1 dimensions LGW A2-2 dimensions LGW A2-3
For the images that aren't clear move the mouse over them to zoom.

 

Differential pressure switches LGW A2P:
dimensions LGW A2P-1 dimensions LGW A2P-2 dimensions LGW A2P-3

 

Dimensions legend
A 2.5 dia for equipment plug
as per DIN EN 175 301-803
2 Pressure connection (-)
B Oblong slot: 0.8 and cross-head
as per DIN 7962-Z2
3 Pressure connection (+),
optional only LGW...A2
1 Pressure connection (+) 4 Test button p+


Type key LGW A2 pressure switch

Legend Pressure switch LGW A2 Schematic Pressure switch LGW A2
For the images that aren't clear move the mouse over them to zoom.


Prices for pressure switches LGW A2

Code Type Prices without VAT
107409 Pressure switch LGW 3 A2 Ag-M-V9 st-se - In Stock 0.00
107417 Pressure switch LGW 10 A2 Ag-M-V9 st-se - In Stock 0.00
107425 Pressure switch LGW 50 A2 Ag-M-V9 st-se - In Stock 0.00
107433 Pressure switch LGW 150 A2 Ag-M-V9 st-se 0.00
218444 Pressure switch LGW 3 A2 Ag-G3-V9 st-se 0.00
222025 Pressure switch LGW 10 A2 Ag-G3-V9 st-se 0.00
222024 Pressure switch LGW 50 A2 Ag-G3-V9 st-se 0.00
120204 Pressure switch LGW 3 A2P Ag-M-MS3-V0 st-se - In Stock 0.00
120212 Pressure switch LGW 10 A2P Ag-M-MS3-V0 st-se - In Stock 0.00
221207 Pressure switch LGW 50 A2P Ag-M-MS3-V0 st-se 0.00
120238 Pressure switch LGW 150 A2P Ag-M-MS3-V0 st-se 0.00
206010 Pressure switch LGW 3 A2 Ag-M-V9 st-se Pa 0.00
214383 Pressure switch LGW 10 A2 Ag-M-V9 st-se Pa 0.00
215938 Pressure switch LGW 50 A2 Ag-M-V9 st-se Pa 0.00
257434 Pressure switch LGW 1,5 A2-7 Au-M-V9 fa-se Pa 0.00
257435 Pressure switch LGW 3 A2-7 Au-M-V9 fa-se Pa 0.00
257436 Pressure switch LGW 6 A2-7 Au-M-V9 fa-se Pa 0.00
257437 Pressure switch LGW 10 A2-7 Au-M-V9 st-se Pa 0.00
257438 Pressure switch LGW 30 A2-7 Au-M-V9 st-se Pa 0.00
Models no longer part of the Dungs main product line:
211075 Pressure switch LGW 3 A2 Au-M-V9 st-se Pa 0.00
217465 Pressure switch LGW 10 A2 Au-M-V9 st-se Pa 0.00
203370 Pressure switch LGW 50 A2 Au-M-V9 st-se Pa 0.00
In case the price is missing or for a list of discounts contact us directly to receive an offer.