VF-21 Compact B5 Flange Mounted Helical Gear Pump

Name: VIMPO PUMPS VF-21 Compact B5 Flanged Helical Gear Pump
Brand: VIMPO PUMPS

VF-21 is a VIMPO PUMPS compact b5 flanged helical gear pump made by Vimpo Makine A.Ş. in Ankara, Türkiye. It has a displacement of 0.021 l/rev, DN25/DN25 ports, a differential pressure up to 20 bar and a temperature up to 230 °C. It operates from 10 to 1,650 cSt.

Series: VF series. VIMPO PUMPS is a brand of Vimpo Makine A.Ş., founded in 1997 in Ankara.

VF-21 datasheet (PDF, English)VF-21 teknik föy (PDF, Türkçe)Request a quote

VIMPO PUMPS VF-21 compact b5 flanged helical gear pump — representative VF series photo

This photo is representative — a VF series pump; it is not an exact image of this model.

0.021 l/rev

Displacement

20 bar

Diff. pressure

230 °C

Temperature

1,650 cSt

Viscosity

Operating principle and construction

VF-21 is a compact helical gear pump whose IEC B5 motor is flange-mounted to the pump and drives it through an elastomer jaw coupling. The flange centring aligns the drive; the unit is supplied on a steel baseplate and delivers up to 20 bar from a very small envelope. The mechanical seal and the integrated by-pass valve are standard. Flow is proportional to speed and independent of pressure. Typical duties are thermal oil circulation, burner and dosing supply and small transfer circuits.

Features

B5 flange-mounted motor with elastomer jaw coupling
aligned by the flange centring; supplied on a steel baseplate

Up to 20 bar in a small envelope

High temperature mechanical seal
standard

Integrated by-pass valve
standard

Vertical or horizontal mounting

Uni-directional
rotation as marked on the pump

Low part count
quick maintenance

VF-21 technical data

Property	VF-21
Displacement (q)	0.021 l/rev
Suction / discharge	DN25 / DN25
Connection	Threaded — ISO 228 G (standard) · NPT optional
Differential pressure (Δp)	1 – 20 bar
Temperature	0 – 230 °C
Viscosity	10 – 1,650 cSt
Speed range	480 – 1450 rpm
Port arrangement	180° — opposed — in-line
Heating	unheated casing (standard) · thermal oil jacket (T) — option · electric heating (E) — option
Shaft seal	mechanical seal (MS) — standard
By-pass	integrated by-pass valve — standard
ATEX	II 1/2G Ex h IIB T4 Ga/Gb — zones 0 and 1, liquid ≤ 130 °C

Values from the current datasheet (TDS-VF21-EN-R5). The duty point is confirmed with the order acknowledgement.

Model code examples

A hyphen separates the fields. An omitted field means the standard of that field. Bare shaft pump examples:

VF21-DN25 — Bare pump without motor — for mounting on a customer's B5 motor; no kW or rpm field

Applications

Fuel and thermal oil
Thermal oil circulation and auxiliary circuits; Burner fuel supply — diesel, light fuel oil

Additive and dosing injection
Lubrication circuits
Small volume transfer in plants and on machines

Application images are representative.

VF-21 in the series

Model	Displacement (q)	Differential pressure (Δp)	Speed range
VF-4	0.004 l/rev	1 – 10 bar	480 – 1450 rpm
VF-21 · this page	0.021 l/rev	1 – 20 bar	480 – 1450 rpm
VF-35	0.032 l/rev	1 – 20 bar	480 – 1450 rpm
VF-48	0.046 l/rev	1 – 20 bar	480 – 1450 rpm
VF-72	0.069 l/rev	1 – 20 bar	480 – 1450 rpm

Datasheet

VF-21 datasheet: properties, model code, dimensions, materials and selection tables.

VF-21 datasheet (PDF, English)VF-21 teknik föy (PDF, Türkçe)

Related products and notes

Other models in the series: VF-4, VF-35, VF-48, VF-72. Related notes: viscosity, speed and flow, by-pass valve. Application: fuel oil and energy. Selection: find pump.

Frequently asked questions

Which liquids does VF-21 pump?

VF-21 pumps liquids from 10 to 1,650 cSt up to 230 °C. Applications: Thermal oil circulation and auxiliary circuits; Burner fuel supply — diesel, light fuel oil; Additive and dosing injection; Lubrication circuits.

What is the maximum differential pressure of VF-21?

20 bar in the standard version.

How do I calculate the flow of VF-21?

Theoretical flow = displacement × speed. For VF-21, q = 0.021 l/rev. When viscosity increases, the permitted maximum speed decreases. Use the capacity table in the datasheet and our note on viscosity and speed to select the pump.

Is an ATEX version of VF-21 available?

Yes. The marking is II 1/2G Ex h IIB T4 Ga/Gb, zones 0 and 1. The maximum liquid temperature is 130 °C. Details: ATEX gear pump note.

Is VF-21 available with a heating jacket?

Yes. For liquids that become solid when cold, such as bitumen, the casing is heated. The options are in the technical table. Comparison: thermal oil or electric.

Where is the VF-21 datasheet?

Download the PDF from the Datasheet section on this page (English and Turkish).

How do I get a quotation for VF-21?

Send the liquid, temperature, viscosity, flow and pressure by WhatsApp or the contact form. We send a quotation with the datasheet.

Request a quotation

Write the liquid, temperature, viscosity, flow and pressure. We reply with the datasheet and a quotation.

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VF-21Compact B5 Flange Mounted Helical Gear Pump