DU146 Automatic bypass and differential pressure valve with differential pressure indicator
|
|
| The DU146 automatic bypass and differential pressure valve is used to maintain a constant differential pressure in a heating system. It reduces flow noise in a system, particularly as thermostatic radiator valves are closed. The boiler return temperature is raised and this reduces corrosion caused by flue gas condensation. In addition, when radiator valves are closed it also maintains flow over the temperature sensor on the boiler to ensure proper operation of external temperature compensation controls. On gas-fired water heaters it guarantees a minimum flow circulation when thermostats or radiator valves are closed. |
For pump-driven warm water heating systems, e.g.:
| • |
On heating systems with three-way or four-way mixing valves, or |
| • |
on gas-fired hot water circulation heating systems. |
|
|
| Materials |
Brass housing, fittings and valve disc, plastic spring bonnet assembly, composite glass display tube, stainless steel spring, EPDM seals |
| Body pattern |
angle |
| Medium type |
water or water-glycol mixture according to VDI 2035 |
| Max. media temperature |
110 oC |
| Max. operating pressure |
3 bar |
| Differential pressure setpoint range |
0.05 ... 0.5 bar |
| Port connection type |
internal threads |
| Additional description |
Special versions available on request. |
| Description | Additional Product Type |
|---|
| Indicator tube assembly, consisting of indicator tube, inner tube, spring, indicator piston and 5 O-rings | DU146AH-A |
