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DELTA VM PUMPS
In the VM series of DELTA pumps the pressurised flow of oil P is shut
off by a built in solenoid and may therefore be switched on for startup
of the motor pre-purge) or off before the motor itself switches off
(flame goes out instantly when the spray from the nozzle stops).
Oil pressure is regulated and kept constant by the piston valve which
is activated when the light comes on to signify that the oil discharged
exceeds nozzle capacity and is being returned to the tank (twin-pipe
system) or being returned to the suction pipe through a bypass in the
pipe (single-pipe system).
In this model both the single-pipe and twin-pipe versions have auto-
matic priming. It is recommended that in eiether case a standard
external filter be installed.
All twin-pipe models can be used as single-pipe systems with the sim-
ple removal of a nylon plug and by closing the return pipe.
Technical data
Oil viscosity
Oil temperature
TWIN TUBE INSTALLATION
Key
1 Pressure regulator
2 Gear
3 Shaft seal
4 By-pass plug, mounted
5 Return
6 Suction
7 Vacuometer gauge
8 Manometer gauge
9 Nozzle
2 ÷ 50 cSt (1,1 ÷ 6,5°E)
60°C (140°F) max
APPENDIX: COMPONENTS CHARACTERISTICS
Suction line vacuum
Suction line pressure
Return line pressure
Cut-Off pressure
Rotation speed
Filter
Dimensions
Connections
Weight
SINGLE TUBE INSTALLATION
Key
1 Pressure regulator
2 Gear
3 Shaft seal
4 By-pass plug, not inserted
5 Return
6 Suction
7 Vacuometer gauge
8 Manometer gauge
9 Nozzle
0,5 bar (15 inHg) max
0,7 bar (10 psi) max
1,5 bar (21 psi) max
4 bar
3500 RPM max
Nylon cloth 150 m, 20 cm²
Optional: Stainless steel 110m, 65
cm²
Hub dia. 32 mm, shaft dia. 8 mm
Optional: flange hub dia. 54 mm
Optional: 7/16" shaft
Inlet - Return port: G1/4"
Nozzle port : G1/8"
Pressure - Vacuum gauge: G1/8"
1100 gr
31
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