DU146 M Automatic bypass and differential pressure valve for district heating systems
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| The DU146 M 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. |
| Specially designed for disctrict heating systems, but can also be used for pump-driven warm water heating systems. |
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| Materials |
Brass housing, spring bonnet and valve disc, plastic adjuster knob, stainless steel spring, EPDM seals |
| Body pattern |
angle |
| Medium type |
water or water-glycol mixture according to VDI 2035 |
| Max. media temperature |
130 oC |
| Max. operating pressure |
16 bar |
| Differential pressure setpoint range |
0.05 ... 0.5 bar |
| Port connection type |
internal threads |
| Additional description |
Special versions available on request. |
