Danfoss REP24CO3 Especificações descarregar pdf (Página 7)

There are two main types of radiator system, each with unique operating properties

and each requiring a diﬀerent valve type selection. See below for a quick guide to

single and two pipe heating systems:

Single Pipe System

As the name implies, a single pipe system is a collection of radiators all connected

to a single loop of pipe work throughout the building. Each radiator has the ﬂow

and return connected to the same pipe. Natural convection allowing heated water

to rise into the radiator, displacing cooler water back into the single pipe circuit.

Single pipe systems can suﬀer from certain system speciﬁc problems:

• Becauseeachradiatorinthecircuitextractsheatfromtheheatedwater,asyou

get further down the circuit the ﬂow temperature is reduced requiring larger

radiators to be ﬁtted towards the end of the circuit.

• Largerpipesizerequiredtofeedtheradiators.

• It isdicult tocompensatefor undersizedradiatorsbyincreasingthewater

ﬂow.

Single pipe systems are rarely ﬁtted from new today, however many systems

are still in operation and can be found in many industrial buildings, factories

and schools. Designed for single pipe heating systems, the RA-G single pipe

thermostatic valves have large diameter valve cones which deliver high capacity

ﬂow and control.

Two Pipe System

In the two pipe system there are separate ﬂow and return pipes, with some form of

bypass (preferably automatic) between the ﬂow and the return. Because the ﬂow

and return in these systems is separate, the temperature of the water reaching

each radiator is basically the same meaning radiator output is roughly the same

at each branch of the circuit.

• Two pipe systems benet from lower material costs due to pipe work and

radiator surface area being smaller generally than in a one pipe system.

• Samesizeradiatorscanbeusedthroughoutthesystem.

• Systembalanceisimportanttoreducenoiseandtemperaturevariationsinthe

system.

Two pipe systems can be ﬁtted with pre-setting (RA-N) or ﬁxed capacity (RA-FN)

valves together with a thermostatic sensor from the RA2000 range.

Single Pipe and Two Pipe Systems

1 2 3 4 5 6 7 8 9 10 11 12 ... 83 84

Sem comentários

Danfoss REP24CO3 Especificações Página 7