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Pressure limiter UB A4, NB A4 Dungs

Pressure limiter UB A4 / NB A4 Dungs
  • These pressure switches ÜB A4, NB A4 are pressure limiters designed for monitoring in firing, ventilation and air-conditioning systems. If the set reference value is exceeded or undershot the system is locked and can be restarted only manually.
  • It is suitable for switching a circuit on, off or over on changes in actual pressure value relative to the set reference value. The reference valve (switching point) can be set easily and quickly by means of a setting wheel provided with a scale without the use of a pressure gauge. Test nipple integrated in metal housing as standard.
  • Maximum operating pressure: 500/600 mbar, setting ranges between 2.5÷500 mbar. Ambient and medium temperature -15÷70oC, storage temperature -30÷80oC.
  • Switching voltage: DC: 12÷48 V, AC 10÷250 V. Nominal current: AC 10 A.
  • The installation position can change the switching pressure with up to 0.5 mbar.
  • Suitable for gases of families 1, 2, 3 and other neutral gaseous media.
  • Detailed pictures for available models (move the mouse over them to zoom):
Pressure limiter UB A4 / NB A4 - 1 Pressure limiter UB A4 / NB A4 - 2 Pressure limiter UB A4 / NB A4 - 3


Functional description:

Single-acting pressure switch in the overpressure range. The pressure limiters work without external energy supply. The switching mechanism reacts to superpressure. The system is locked if the set reference value is exceeded or overshot. After the fault has been remedied, the system can be put into operation only manually by actuating the unlocking device on the pressure limiter. The switching state "Locked" is indicated by a neon glow lamp.
 
  • UB ... A4
Switches on and locks if the set pressure value is exceeded.
 
  • NB ... A4
Switches on and locks if the pressure is lower than the set pressure value.


Technical specifications NB A4 - UB A4 pressure limiters

Pressure switch type Code Setting range (mbar) pmax (mbar) Degree of protection Medium p(+) Contact material Electrical connection
Pressure limiter NB 50 A4 210534 5 ÷ 50 500 IP 54 gas Ag Terminal
Pressure limiter NB 150 A4 210931 30 ÷ 150
Pressure limiter NB 500 A4 210971 50 ÷ 500 600
Pressure limiter NB 50 A4 138540 5 ÷ 50 500 IP 54 gas Ag Terminal
Pressure limiter NB 50 A4 209711 5 ÷ 50 Plug

 

Pressure switch type Code Setting range (mbar) pmax (mbar) Degree of protection Medium p(+) Contact material Electrical connection
Pressure limiter UB 50 A4 210537 5 ÷ 50 500 IP 54 gas Ag Terminal
Pressure limiter UB 150 A4 138630 30 ÷ 150
Pressure limiter UB 500 A4 210970 50 ÷ 500 600
Pressure limiter UB 50 A4 207370 5 ÷ 50 500 IP 54 gas Ag Plug
Pressure limiter UB 50 A4 220559 5 ÷ 50
Pressure limiter UB 150 A4 220480 30 ÷ 150


Dimensions UB A4 / NB A4 (mm)

Pressure limiters UB A4 - NB A4:
dimensions UB A4 - NB A4 - 1 dimensions UB A4 - NB A4 - 2 dimensions UB A4 - NB A4 - 3
For the images that aren't clear move the mouse over them to zoom.

 

Pressure limiters UB A4 / UB A4 - NB A4 / NB A4:
dimensions UB A4 / UB A4 - NB A4 / NB A4 - 1 dimensions UB A4 / UB A4 - NB A4 / NB A4 - 2


Type key UB A4 / NB A4 pressure limiter

Legend Pressure switch UB A4 / NB A4 Schematic Pressure switch UB A4 / NB A4


Prices for pressure limiters

Code Type Prices without VAT
210534 Pressure limiter NB 50 A4 Ag-PG-MS9-V0 fa-se 0.00
210931 Pressure limiter NB 150 A4 Ag-PG-MS9-V0 fa-se 0.00
210971 Pressure limiter NB 500 A4 Ag-PG-MS9-V0 fa-se 0.00
210537 Pressure limiter ÜB 50 A4 Ag-PG-MS9-V0 st-se - In Stock 0.00
138630 Pressure limiter ÜB 150 A4 Ag-PG-MS9-V0 st-se 0.00
210970 Pressure limiter ÜB 500 A4 Ag-PG-MS9-V0 st-se 0.00
Models no longer part of the Dungs main product line:
138540 Pressure limiter NB 50 A4 Ag-PG-MS9-V0-VS3 fa-se 0.00
209711 Pressure limiter NB 50 A4 Ag-G3-MS9-V0-VS3 fa-se 0.00
207370 Pressure limiter ÜB 50 A4 Ag-G3-MS9-V0 st-se 0.00
220559 Pressure limiter ÜB 50 A4 Ag-G3-MS9-V0-VS3 st-se 0.00
220480 Pressure limiter ÜB 150 A4 Ag-G3-MS9-V0 st-se 0.00
In case the price is missing or for a list of discounts contact us directly to receive an offer.