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):
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:
For the images that aren't clear move the mouse over them to zoom.
Pressure limiters UB A4 / UB A4 - NB A4 / NB A4:
Type key UB A4 / NB A4 pressure limiter
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.