Delta Pump VD2 LR1 single-tube

Oil burners fuel unit with pressure regulating Type VD www.deltapumps.com VD1 - V5 flanged Certified Quality System Printed in Italy - DE111/0404  Oil burners fuel unit with pressure regulating Type VD The DELTA fuel unit is an efficient modern oil burner pump with compact design and since its mounting flange, hub and shaft sizes are manufactured to 1 international standards (EN 225), it can be fitted to every oil burner. 9 1- Features 2 8 • High suction capability. • Suitable for one or two pipe systems. • Self priming. 7 • Reliable pressure and positive cut-off (two pipe). • Special rotary shaft seal. 3 • Silent operation. 4 • Low power absorption. • Easily installed and adjusted. 5 6 • Pressure and vacuum gauge ports. 2- Applications From the suction side, the gears pass the oil to the The DELTA fuel unit type VD is designed for pumping oil pressure chamber, where it comes up against the head in high pressure oil burners and transfer pump of the piston. Due to the build up of pressure, the piston applications. is forced back against the pressure regulating spring. The outlet to the nozzle port, which until this point has WARNING been sealed by the seat on the head of the piston, opens It must not be used to pump water or acid. and allows oil to flow through to the nozzle while the excess oil discharges to the return side (or by-passes in the one pipe version). It will be realized of course that 3- Operation the spring tension, which is varied by the regulating The VD fuel unit consists of a pump, filter and pressure screw (1), regulates the pressure of oil required. regulator/cut-off valve housed within one casting. The On shut down, the oil pressure of course immediately pumping action is obtained from two spur gears (2), one drops and in this instance the spring, which hitherto has of which is connected to the drive shaft (3). The pump been under compression, pushes the piston forward casting provides the various oil ways, for the suction (6), onto its seat, thereby cutting off the oil flow to the nozzle return (5) and nozzle (9) ports. Pressure (8) and vacuum outlet (two pipe version). (7) gauge ports are also provided. The VD unit is available in two pipe and one pipe In oil burner designs employing a magnetic valve in the version. Both versions are self priming. oil line circuit, the cut-off seat on the piston head is unnecessary and in these cases a "monotube" type On start up, the rotating gears purge the air from the piston must be used in the pump. This type of piston is suction chamber, through a vent groove in the piston to not fitted with a nozzle cut-off seat and its function is as the return line in two pipe version, and through the a pressure regulator and safety valve, for instance for nozzle line in one pipe version. On initial commissioning, expansion of pre-heated oil. it is possible to bleed the air more quickly, through the The pump can be converted from the single pipe version pressure gauge. to the two pipe version, fitting the by-pass plug (4) in the Because a vacuum now exists oil, due to atmospheric return port. pressure, enters the suction chamber through the filter. 2 Printed in Italy - DE111/0404 4- Pump identification VD 1 R L 2 4 U Pump type Nozzle capacity (see graphs) Rotation (seen from shaft end) R = clockwise L = counter clockwise Nozzle line (seen from cover) R = right L = left Pipes system 1 = one pipe 2 = two pipe Pressure ranges Factory setting 3 = 2 ÷ 10 bar 4 ±0,3 bar 4 = 4 ÷ 15 bar (Standard) 10 ±0,3 bar 5 = 8 ÷ 20 bar 15 ±0,3 bar 6 = 10 ÷ 25 bar 20 ±0,3 bar Special versions U = cover type U with 65 cm² stainless steel filter, mesh 110µ (standard on V5) without pressure and vacuum gauge (except V5) P = auxiliary pressure port 5- Technical Specifications Oil viscosity ………………………………… 1,2 ÷ 50 cSt Oil temperature …………………………….. 60°C max. Power consumption …………………….. See graphs Nozzle capacity……………………….…….. See graphs Suction line vacuum ………………………. 0,5 bar max. Suction line pressure ……………….…….. 2 bar max. Return line pressure ……………………… 2 bar max. Rotation speed ……………………….……. 3500 rpm max. Standard strainer…………………………… Nylon mesh 150µ, 20cm² (VD1 9 cm²) Dimensions (EN 225) ..……………………. Hub dia.32, shaft dia.8 Optional : flange hub dia. 54, shaft 7/16” Connections (ISO 228/1) ……………….… Inlet – Return : G1/4” Nozzle port : G1/8” Pressure – Vacuum gauge : G1/8” Weight ……………………………………….. gr. 950 3 Printed in Italy - DE111/0404  6- Diagrams Nozzle capacity Power consumption L/h Visc. 5 cSt (1.4°E) 2800 RPM 125 Visc. 5 cSt (1.4°E) Watts 2800 RPM 100 V5 200 VD4 75 VD4 150 V5 VD3 VD3 50 100 VD2 VD2 VD1 25 50 VD1 5 10 15 20 25 Bar 5 10 15 20 25 Bar 7- Overall dimensions 84 ÷ 94 20 1 9 Ø32 7 63 V P Ø8 40 Made in Italy 28 7 8 23 19 25 42 54 (46xVD1) 5 6 96 (88xVD1) 7 8 1 9 20 34.5 Ø54 Ø10.5 Ø8 7 Made in Italy 27.5 30.5 10 23 15 24 32 5 25 6 38 4 56 92 98 112 103 1 Pressure regulation 5 Return 6 Suction 7 Vacuum gauge 8 Pressure gauge 9 Nozzle port 10 Auxiliary pressure port 4 Printed in Italy - DE111/0404 8- By-pass installation To convert the DELTA fuel unit from the single pipe version to the two pipe version, do the following: a) Using a 19 mm wrench, remove the 1/4" plug from return port (Fig. 1). V P b)…