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SUNTEC PUMPS AS 47 - 57 - 67
Operating principle
The gear set draws oil from the tank through the built-in filter and tran-
sfers it to the valve that regulates the oil pressure to the nozzle line.
All oil that does not go through the nozzle line will be dumped through
the valve back to the return line in two pipe installation or, if it is a one-
pipe installation, back to suction port in the gear set . In that case, the
by-pass plug must be removed from the return port, and the return
port sealed by steel plug and washer. The solenoid valve of the AS
pump is of the "normally opened" type. When the solenoid valve is
non-activated, the by-pass channel between the pressure and return
sides of the valve is open. No pressure will then be built up to open
the valve; it does not matter which speed the gear set has. When the
solenoid is activated, this by-pass channel is closed and because of
the full speed of the gear set, the pressure necessary to open the
Technical data
Mounting: flange or hub mounting according to EN 225.
Connection: threads cylindrical according to ISO 228/1.
Inlet and return
Nozzle outlet
Pressure gauge ports
Vacuum gauge port
Valve function
* cut-off function only assured for model pressure range.
Strainer open area
Shaft: Ø 8 mm according to European standard EN 225.
By-pass pluginserted in return port for two-pipe system; to be removed
with a 4 mm Allen key for one pipe system.
Weight
Hydraulic Data
Gear size: Nozzle pressure range * Factory setting
47/57 7- 14 bar 9 bar; 67 10 - 15 bars 10 bar
* other ranges available on request, refer to the specified range of the
Operating viscosity
Oil temperature
Inlet pressure
Return pressure
Suction height: 0,45 bar max. vacuum to prevent air separation from oil.
Rated speed: 3600 rpm max. (AS 47, AS 57*) - 2850 rpm max (AS 67)
* except for AS 57 with code date before 000101 (pumps manufactured
before Jan. 1st , 2000) = 2850 rpm max.
Torque (@ 45 rpm)
Twin pipe installation
G 1/4 (with facilities for conical sealing
on revision 5 models)
G 1/8
G 1/8
G 1/8
Pressure regulation and cut-off*.
14 cm
2
- opening size: 150 µm.
1,1- 1,5 kg (depending on the model).
particular fuel unit.
2 - 12 mm²/s (cSt)
0 - 60°C in the pump.
2 bar max.
2 bar max.
0,10 N.m (AS 47/57) - 0,12 N.m (AS67)
Single pipe installation
APPENDIX: COMPONENTS CHARACTERISTICS
valve will be built up very rapidly, which gives a very sharp cut-on fun-
ction.
Cut-off
When the burner stops, the solenoid opens the by-pass at the same
moment, which drains all the oil down to the return, and the nozzle
valve closes immediately. This gives a very sharp cut-off function.
The cut-on and cut-off can be actuated regardless of motor speed
and have an extremely fast response. When the solenoid is not acti-
vated, the torque requirement is low up to full motor speed.
Bleed
Bleeding in two pipe operation is automatic, but it may be accelerated
by opening a pressure port. In one pipe operation, a pressure port
must be opened to bleed the system.
Solenoid valve characteristics
Voltage
Consumption
Ambient temperature
Maximum pressure
Certified TÜV Nr.
Protection class
A
Closed solenoid valve
B
Open solenoid valve (NO)
C
Closed return
1
Solenoid valve
2
Pressure regulating valve
3
Pressure adjustment
4
To nozzle
5
Pressure gauge port
6
Escape valve
7
Shaft seal
8
Vacuum gauge port
9
By-pass plug "P"
10
Gear set
11
Inlet
12
Return
13
Back to suction
14
From gear set
15
To shaft seal and return
X
Oil under suction
Y
Oil under pressure
Z
By-passed oil returned to tank or to suction
220-240 or 110-120 or 24 V; 50/60 Hz.
9 V.A (@ voltage = 220 or 110 or 24 V).
0 - 60°C
15 bar
stamped on pump body.
IP 41 according to IEC 529, when used
with SUNTEC connector cable.
29
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