VMK Oil burners fuel unit with 2 stages operation

Product catalog summary

Overview: The document provides technical specifications and operational guidelines for the DELTA VMK oil burner fuel unit, designed for two-stage operation. It is compatible with international standards and suitable for various oil burners.

1. Features:

High suction power and self-priming capability.
Operates with one or two pipe systems.
Balanced pressure regulator for constant pressure.
Silent operation with low power consumption.
Equipped with pressure and vacuum gauge ports.

2. Applications: The VMK unit is intended for high-pressure oil burners with two-stage operation. It is not suitable for pumping water or acid.

3. Operation:

The unit ensures two-stage operation with independent pressure regulation for starting and working phases.
Requires a second solenoid valve on the nozzle line for proper operation.
Initial commissioning allows for quick air bleeding through the pressure gauge port.

4. Pump Identification: The VMK pump is identified by type, nozzle capacity, rotation direction, pipe system, and pressure settings. Special versions include additional features like a stainless steel filter or auxiliary pressure port.

5. Technical Specifications:

Oil viscosity: 2 to 50 cSt; maximum oil temperature: 60°C.
Maximum rotation speed: 3500 RPM.
Standard strainer: Nylon mesh 150µ.
Various coil specifications for different voltage and frequency requirements.

6. Diagrams: Includes diagrams for nozzle capacity and power consumption, highlighting key components like high-pressure regulation and solenoid valves.

7. Overall Dimensions: Detailed dimensions are provided for installation and compatibility checks.

8. By-pass Installation:

Instructions for converting between single and two-pipe versions.
Warnings about proper air bleeding and by-pass plug usage to prevent damage.

Catalog excerpts

VMK Oil burners fuel unit with 2 stages operation-1

Oil burners fuel unit with 2 stages operation Type VMK Certified Quality System Printed in Italy - DE113/0404

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VMK Oil burners fuel unit with 2 stages operation-2

Oil burners fuel unit with 2 stages operation Type VMK 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 international standard (EN 225), it can be fitted to every oil burner. Suitable for a one or two pipe systems. Self priming. Balanced pressure regulator valve giving constant pressure. Special rotary shaft seal. Silent operation. Easily fitted and adjustment. Provided with pressure and vacuum gauge ports. 2- Applications The DELTA fuel unit type VMK is designed for pumping oil in high pressure...

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VMK Oil burners fuel unit with 2 stages operation-3

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 pipes st 1 stage pressure range (P1) Factory setting 4 ÷ 11 bar (P2 - 4) ±0,3 bar nd 2 stage pressure ranges (P2) Factory setting 4 = 4 ÷ 15 bar (Standard) 12 ±0,3 bar 5 = 8 ÷ 20 bar 15 ±0,3 bar Special versions U = cover type U with 65 cm² stainless steel filter, mesh 110µ without pressure and vacuum gauge P = auxiliary pressure port Coil type F = F84 coil with connector plug M = M8 coil with flexible metal...

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VMK Oil burners fuel unit with 2 stages operation-4

6- Diagrams Nozzle capacity Power consumption High pressure regulation Return Suction Vacuum gauge 8 Pressure gauge 9 Nozzle port 10 Solenoid valve 11 Auxiliary pressure port Printed in Italy - DE113/0404

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VMK Oil burners fuel unit with 2 stages operation-5

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). b) Located inside the return plug is the by-pass plug. P Remove it with a 4 mm Allen wrench (Fig.2). c) Insert and screw the by-pass plug in the return port (Fig. 3). Fig. 1 19 To convert the DELTA fuel unit from the two pipe version to the single pipe version, do the following: d) Using a 4 mm Allen wrench, unscrew the by-pass plug from the return port (Fig. 3). e) Insert and screw a 1/4" plug into the return port (Fig....

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