Zmr fuel tank

FUEL TANKZMERLY ACADEMY - 2019
INTRODUCTION
A complete oil-burning plant begins at the oil tank filling
connection and ends at the chimney pipe.
Every parts of the plant must function so that the system
is CLEAN, STABLE and ECONOMIC.

FUEL STORAGE TANK AND ACCESSORIES
- Fuel oil tank
- Types of tanks
- Type of installation
- Tank sizing
- Burner connection
- Fuel supply pipe
- Suction devices
- Level management
- Fuel oil filters
- Fuel Deaerator

INDOOR FUEL TANK
• Maximum capacity per tank 2500 Liter.
• Tank location in ground floor or basement.
• In a well ventilated room with fire rated door.
• The indoor tank can be Metallic or plastic
• In case of single wall tank, the retention tank is mandatory.
• If the tank is placed in a garage, it should be protected from shock.

INDOOR FUEL TANK – RETENTION TANK
• Capacity of retention volume must be
equal to the maximum between:
 100% of the volume of the biggest tank
• The retention tank is necessary to catch the fuel
oil in case of tank leakage.
 50% of the total volume of all tanks
• The retention tank can be Metallic or concrete.

PLASTIC TANKS
• Material HDPE.
• Light, tight, safe, shock resistant, ready to connect, optimal
space use, easy to maintain.
• Maximum capacity 1500 Liter.
• The plastic tanks are the most used for small capacity, and for
domestic use.
• Can be used for indoor and outdoor installation.
• Combi tank, or double wall tank, are
safer and don’t need retention tank.
• Multiple tank in “Battery” installation up to 10.000 Liter.

TANK CAPACITY
The sizing of the fuel tank, start from a Rule of thumb:
Consumption of 0.1 liter/hour of fuel oil per 1 kW boiler output.
Consider an Average of 400 Hour of heating per year.
The consumption is around 40L/year for 1kW.
The tank is filled twice per year.
The tank capacity calculation is based on 20
Liter per kilowatt.

OIL QUALITY AND TEMPERATURE
The characteristics of the oil equipment are factory-checked with a standard fuel
oil having closely fixed flow properties measured at 20°C. (viscosity 6mm²/s).
On plant where the oil tank may be exposed to low temperatures,
certain problems can occur.
In an outdoor tank, the oil can easily become cold and then thick .
The oil droplets become bigger , making the flame longer and more ”sluggish”
in burning, and the nozzle output increase which will usually mean that
combustion becomes sooty.
Oil tanks which are outside and above ground, and all the exposed pipes,
ought to be insulated to avoid problems in wintertime.

WATER IN THE FUEL OIL TANK
Any water in an oil tank is an extra hazard. When temperatures drop to around
freezing point the water will turn into ice and may block the oil pipe.
When atmospheric air comes into contact with a cold oil tank the air content will
condense. After a time an amount of water collect at the bottom of the tank.
Also rainwater often seeps into the tank because of a badly seal filling cap, etc.
When the water in the bottom of the tank reaches such a level that the suction line
begins to draw water there is a danger of the burner pump being damaged.
A special paste smeared on a dip stick, inserted into the tank, it changes color
to indicate the presence of water in the tank.
Low outside
temperature
Low air
temperature

BURNER CONNECTION
Just as no human being can function without a heart, so the
oil pump is vital to the operation of an oil-fired heating
plant.
The fuel oil, is transported from the tank to the burner and
is subjected to a suitably high and stable pressure.
The burner pump is usually
connected to two flexible hose
for supply and return.
An oil filter should be installed
upstream of the burner to prevent the
nozzle becomes clogged.

BURNER CONNECTION
On an installation where the tank is
located higher than the pump, a one-
pipe system can be used, i.e. a suction
line and no return line.
On an installation where the tank is
below the level of the burner, the oil
must be lifted.
Most commonly used for this
application is the two-pipe system,
i.e. a suction and a return line.
Any excessive oil as well as air is returned to the tank where
the system vents itself.
In this type, the amount of return oil is higher than the
supplied to the nozzle.
The nozzle take only 5% and reject 95% of the fuel to the
tank.
This kind of connection is achieved by a small
modification in the burner pump, or by installing a fuel
filter with integrated return.

TANK POSITION
The suction capacity of the pump and the associated pipe dimensions must be accurately known. The reliability of the
system depends entirely on whether the pump can lift oil from the tank and deliver it to the burner.
Operating with too strong vacuum must be prevented.
For system under pressure, burner catalogue must
be checked for maximum permissible height.
The max. suction head depend varies with altitude.

SUCTION PIPE SIZING
The fuel oil flow rate is based on a consumption of 0.1 liter/hour per 1 kW boiler output.
Dimensioning of the oil suction pipe and fittings is essential for the smooth and right
operation of the oil burner.
Other parameters to be considered:
• The height of the tank above the burner.
• The total length of the pipe.
• The number of elbows and fittings in the pipe.
• The pressure drop for equipment installed.
• The viscosity of the fuel.
• The density of the fuel.
The velocity in the suction line should be between 0.2 and 0.5 m/s.

SUCTION PIPE SIZING
For Burner capacity 30kW
Single pipe system:
Fuel Flow rate = 0.1x30 = 3 l/h
If we used a copper tube of 6x1mm, with inner diameter 4mm:
Linear pressure drop R = 7mbar/m.
Velocity V = 0.07m/s
Double pipe system:
Fuel Flow rate = 0.1x30x20 = 60 l/h
If we used a copper tube of 10x1mm, with inner diameter 8mm:
Linear pressure drop R = 8.5mbar/m.
Velocity V = 0.33m/s.
The DIN 4755 specify a max. total pressure loss of less than 0.4 bar

SUCTION LINE DIVICES
A suction line is not merely a pipe between oil tank and pump. Extra equipment is
necessary in the line, to ensure reliability and to meet statutory requirements.
• quick acting isolating valve on the tank.
• Pre-filter to protect the plant from dirt and sediment in the oil tank
• Manual shut-off valve integrated in the filter to make it easy to clean or
replace the cartridge.
• Diaphragm anti siphon valves, to prevent the oil in the tank being
siphoned off if a leakage in the suction pipe occurs.
• Pressure balance device.

FLOATING SUCTION “FLEXO-BLOC”
The heating oil is drawn off approx. 4-6 cm below the oil level.
This way only the cleanest oil is used.
When the tank is empty, a star-shaped spacer protects the
suction from immersing into the oil sump.
“Flexo-Bloc” with floating suction is used as oil draining facility
for individual and battery tanks.
The “Flexo-Bloc” is equipped with an quick acting isolating
valve with rocker arm which can be operated with the help of a
release cord.
An integrated non-return ball check valve prevents a drop of
the oil column during burner stop.

DIAPHRAGM ANTI-SIPHON VALVE “OILSTOP”
Diaphragm anti-siphon valves prevent the oil in the tank being siphoned off if a leakage in
the suction pipe occurs.
Diaphragm anti siphon valves are installed in the suction pipes of heating oil installation,
where the tank level is above the lowest point of the suction pipe.

PRESSURE BALANCE DEVICE “OLEX”
After inactivation of the burner, the oil in the suction pipe between the non-return
check valve at the tank and the valve at the burner pump may become trapped. If
the oil in the pipework warms up, it expands and pressure increases.
The expanding oil is absorbed by the pressure balance device and an inadmissible
pressure increase is avoided.

MECHANICAL LEVEL INDICATOR
• Infinitely adjustable for tanks up to 2 m height.
• Oventrop Mechanical level indicator measures the height
of the fuel in the tank in Cm
• According to DIN 4755, every oil storage tank, and in the
case of multi-chamber tanks, every chamber must be
equipped with a facility for measuring the liquid level.
• Easy to connect and adjust.

PNEUMATIC LEVEL INDICATOR
The level indicator measures the hydrostatic liquid pressure at the tank
bottom. The pressure is measured approx. 2Cm above the tank bottom and
displayed on the gauge dial.
• It indicats the liquid height in %, from 0 to 100%, for
rectangular and horizontal cylindrical tanks.
• Capillary tubing, Cu tubing or PE hose can be used
to connect to the tank.
• Infinitely adjustable for tank heights from 1 to 3 m,
and up to 50m distance.
• the outside temperature can be in between -5°C
and +55°C
• Install a condensate trap if the level indicator is
mounted below the max. liquid level in the tank.
Up to 50m

LEVEL GAUGE WITH ELECTRONIC REMOTE INDICATOR
Indicating the current level of the fuel, and
monitoring minimum and maximum level.

OVERFILL PROTECTION
Tank filling limiter is installed to protect the tank from overfilling. It is mandatory for above and underground tanks
exceeding 1000 liter.
It consists of a probe (height adjustable), which protrudes into the tank. At its lower end sits the sensor (PTC).
The thermistor changes resistance when immersed in the liquid
abruptly. This change is transmitted to the truck to stop the filling pump.

FEUL FLOTING LIMIT
Special fuel float valve, and float switch.

TANK FILLING WHISTLE
When the tank is being filled, with the whistle in place, a
whistling sound is made out through the vent pipe next to the
fill pipe.
Installed in vent opening on fuel oil tank.
The vent cap must not end in a closed area.
Vent cap with screen
When the fuel oil reaches the whistle tube the whistling stops,
indicating the tank is near full.

FUEL OIL FILTER
One pipe Filter Two pipe Filter
Two pipe Filter
With return
Heating oil filters are manufactured in various types and sizes (filters for two pipe systems and one pipe systems with/without
return flow feed).
A choice of different filter inserts is available.
Filtration range between 20 and 150 Microns.
On a domestic oil burner, in addition to the nozzle filter and the filter built into the oil pump, there should be a separate filter
in the suction line immediately before the pump.
The cartridge must be changed once per year.

AIR SEPARATOR
When oil is drawn up from the oil tank to the burner, some gas bubbles can be released from the oil. But also a big amount
of bubbles is released from the fuel coming back from the burner return.
The gas/air bubbles flow with the oil into the oil pump and are the
leading cause of breakdowns, increased build up of soot, unnecessary
wear and tear on the oil pump, and higher oil consumption.
The OVENTROP Toc-duo, and Toc-Uno de-aerators make each
installation even more safe and efficient.
It ensures that oil passing through the oil pump to the burner
nozzle is completely air-free. This allows highly efficient
combustion without dripping problems.
Oventrop heating oil de-aerator are used in one pipe systems with return flow feed (suction systems) for effective filtering
and de-aerating of heating oil.

AIR SEPARATOR

FEUL FLOTING LIMIT
With the wide rang of Oventrop heating oil products, the engineers
and installers may fulfill the demands of any installation.

www.‫.زمرلي‬com
Thank you
‫مالحظة‬:،‫محفوظة‬ ‫غير‬ ‫لدينا‬ ‫النشر‬ ‫حقوق‬
‫ال‬ ‫تعميم‬ ‫بهدف‬ ‫التوزيع‬ ‫و‬ ‫النسخ‬ ‫بإمكانكم‬‫فائدة‬.

Zmr fuel tank

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