Determination Of The Flow Rate, The Pipe Diameter, And The Pressure Loss - GOK 500ERAZ Instrucciones Par El Montaje Y El Funcionamiento

DETERMINATION OF THE FLOW RATE, THE PIPE DIAMETER, AND THE PRESSURE LOSS

Determination of the flow rate w in m/s
⇒
Installation in
.
V
=
Volume flow rate
Operating medium
(L/h)
For fuel oil consumer installations, the following mean flow rate is applicable in
accordance with DIN 4755: Suction: (0.2 ÷ 0.5) m/s; Discharge: (1.0 ÷1.5) m/s
Taking into account the length of the suction
line, the geodesic height, the suction height,
and the fuel oil volume flow rate, the following
can be recommended for selecting the piping in
suction mode: (AD = outer diameter,
t = material thickness in mm)
• Lower flow rates in suction mode will result in an undesired formation of bubbles
• Piping with an internal diameter of less than 4mm is not recommended!
Maximum total pressure loss for all fittings in the suction line = 0.4bar
The pressure loss depending on the fuel oil volume flow rate and the filter element used can
be found in the diagrams:
Diagram1: pressure loss ∆p filter type 500ERAZ in the return supply area
Diagram 2: pressure loss ∆p filter type 500ERAZ in the tank – burner supply area
6 / 14
Single conduit
system
≈
Heat input
in kW / 10
Double conduit
system
=
Gear output of the
burner pump
.
V Fuel oil
1 ÷ 10L/h
8 ÷ 45L/h
25 ÷ 130L/h
⇒
90 ÷ 170L/h
For the total pressure loss of the filter,
the pressure loss is to be individually
determined depending on the fuel oil
EL volume flow rate and to be the
sum of:
The return supply area +
Tank – burner supply area
Filter elements:
Siku 70μm, Siku 35μm,
Siku 70μm long, Siku 35μm long, felt
70-80μm, stainless steel 100,
Ultra-fine filter MC-7 7-20μm,
Replacement filter 25µm
Filter area:
100% = pure/clean
50% = filter area 50%
V =
Pressure line Calculation
=
w = 0.3537 •
Delivery rate of
ID=internal pipe
the pump
diameter (mm)
AD x t copper pipe
6 x 1mm
8 x 1mm
10 x 1mm
12 x 1mm
dirty/impermeable
fuel oil volume flow rate
Item No. 13 852 50 c
.
2
/ ID
V