Regulation With Constant Differential Pressure; Regulation With Proportional Differential Pressure - DAB BPH-E Serie Installations- Und Wartungsanleitungen

9.2 Regulation with constant differential
pressure.
This is set by means of the control panel on the
cover of the Dialogue.
remains constant, irrespective of the
The head
demand for water.
H
Regulation
Constant
pressure
Proportional
pressure
Q
Type of system
In systems with relatively low
load losses in the boiler
circuits and in the pipes.
In systems with relatively high
load losses in the boiler
circuits and in the pipes.
ENGLISH
9.3 Regulation with proportional differential
pressure.
This is set by means of the control panel on the cover
of the Dialogue.
The pressure is reduced or increased as the demand
for water falls or rises.
1. Heating
thermostatic valves and with:

head lower than 2 metres,

natural circulation,

low load losses in those parts of the system
where the total quantity of the water flows.

high differential
heating).
2. Single-pipe heating systems with thermostatic
valves and calibrating valves.
1. Heating
thermostatic valves and with:

head higher than 4 metres,

very long pipes,

valves with wide operating range,

differential pressure regulators,

high load losses in those parts of the system
where the total quantity of the water flows.

low differential temperature.
41
H
Q
Examples
systems with two
temperature
systems with two
pipes with
(centralised
pipes with