APPENDIX - COMPONENTS CHARACTERISTICS
28
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 exce-
eds 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 (sin-
gle-pipe system).
In this model both the single-pipe and twin-pipe versions have automatic priming. It is recommended that in eiether case a standard external fil-
ter be installed.
All twin-pipe models can be used as single-pipe systems with the simple removal of a nylon plug and by closing the return pipe.
Technical data
Oil viscosity
2 ÷ 50 cSt (1,1 ÷ 6,5°E)
Oil temperature
60°C (140°F) max
Suction line vacuum
0,5 bar (15 inHg) max
Suction line pressure
0,7 bar (10 psi) max
Return line pressure
1,5 bar (21 psi) max
Cut-Off pressure
4 bar
Rotation speed
3500 RPM max
Filter
Nylon cloth 150 m, 20 cm²
Optional: Stainless steel 110m, 65 cm²
Dimensions
Hub dia. 32 mm, shaft dia. 8 mm
Optional: flange hub dia. 54 mm
Optional: 7/16" shaft
Connections
Inlet - Return port: G1/4"
Nozzle port : G1/8"
Pressure - Vacuum gauge: G1/8"
Weight
1100 gr
TWIN TUBE INSTALLATION
SINGLE 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
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
