Key features
Vogelsang reduced the IQ to a few individual elements. The housing is a single component, dismounted in a few movements for access to the pumping elements, and the pump itself stays screwed into the pipework.
Vogelsang's integrated foreign-matter protection for a rotary lobe pump. It makes the pump as resistant to foreign matter as it is to dry running, protects the lobes from damage, and holds the pumping speed uniform.
Pulsation-free pumping, which Vogelsang links to longer life for the drive and the coupling. The extra sealing lines raise suction capacity, enough to draw from deep pits.
The mechanical seal arrives as a cartridge, pre-assembled and computer-checked in the factory. That takes the assembly errors out of a seal change on site and shortens commissioning after one.
Vogelsang halves the number of central spare parts against its conventional design. It also states that changing every wearing part on the pump, lobes and wear plates and housings and seals, takes under half the usual time.
Larger HiFlo lobes and a larger pump cover fit the same pump with no modification. Vogelsang puts the gain at up to 40% more pumping capacity.
About the Vogelsang IQ series
The IQ series is aimed at the cost of maintaining a rotary lobe pump, not the cost of buying one. The pumping principle is the same as the rest of the Vogelsang range, and the lobes are the same HiFlo geometry. What changed is the count of parts around them. Vogelsang states the number of central spare parts is halved against its conventional design, and that a full wearing-parts change takes less than half the usual time.
Two models cover the range, and that is the first thing to check. The IQ112 goes to 78 m³/h and the IQ152 to 154 m³/h, both at up to 7 bar. Vogelsang puts the IQ on primary sludge, media carrying coarse matter such as contaminated used oil, and abrasive duties in disposal, and its own case studies for the series run to latex and copolymers, abrasive paints, and a sewage works with very little room to work in.
Where the VX series is the better buy
Above 154 m³/h or 7 bar, the IQ is out of range and you are looking at the VX series instead, which carries five model ranges and a much wider build envelope. The IQ is also the wrong answer if the duty is clean, thin liquid at moderate head. A centrifugal costs less to buy and less to run, and the rule of thumb we work to is that positive displacement earns its money once you are past roughly 3–4% solids, or the medium thickens, or it must not be sheared.
Dry running
Vogelsang lists the IQ as resistant to dry running, and puts that down to a fluid reservoir and the design of the gearbox housing, backed by the InjectionSystem. That is a real design property. Read it as tolerance rather than permission. A mechanical seal needs liquid to lubricate it, and dry running is one of the three things that finishes pumps on a wastewater site, alongside rag and grit. If a pump is running dry in service, the suction conditions are wrong, and the fix is upstream of the pump.
What you give up
Configuration breadth. The IQ is deliberately simplified, and the price of simplifying a pump is that fewer things about it are variable. If your duty needs an unusual sealing arrangement or a build the two models do not cover, the VX or the EP series is the range with the options in it. Tell us the duty first and we will say which.
How the Vogelsang IQ series works
Two lobed rotors turn against each other inside the pump chamber and carry a fixed volume of medium around the outside of the chamber on every revolution. The displacement is positive, so flow holds up as the discharge pressure rises instead of falling away the way a centrifugal's does. Delivery rate follows shaft speed, which is why a rotary lobe pump is straightforward to control on a variable-speed drive.
The one-piece housing
The IQ pump housing is a single component, where the VX pump chamber is built up from more parts. Undo it, lift it off, and the pumping elements are in front of you with the pump still screwed into the pipe. That is the whole design argument for the series. It is also why the QuickService claim goes further here than elsewhere in the range. Lobes, seal, wear plates and housing all change on site, and the pump never comes out.
Connections are the other half of the same idea. Vogelsang supplies variable series connecting parts that suit the common installation situations, so the pump goes into a range of positions, tank vehicles and mobile units included, without special connectors. A drain plug empties the pump chamber almost completely before service.
The InjectionSystem
Vogelsang calls this the first integrated foreign-matter protection built into a rotary lobe pump. It protects the lobes from damage and keeps the pumping speed uniform, and it is the same feature Vogelsang credits for the pump's tolerance of dry running. The dry-running side of it comes from a fluid reservoir and the design of the gearbox housing, not from anything in the lobes themselves.
Lobes and capacity
The IQ uses Vogelsang's HiFlo rotary lobes. Against a conventional lobe they pump without pulsation, which Vogelsang ties to longer drive and coupling life, and the higher number of sealing lines lifts the suction capacity enough to pull from a deep pit. The lobes and the pump cover are interchangeable for larger sizes, fitted without modifying anything else, and Vogelsang states that route gives up to 40% more pumping capacity. Worth knowing before you oversize at specification: the headroom can be bought later.
Sealing and materials
The shaft seal is the Vogelsang Quality Cartridge, a mechanical seal built as a cartridge, assembled and computer-checked in the factory so a site change does not depend on getting the assembly right. Standard build is abrasion-resistant grey cast iron. ADI and stainless steel versions are stocked, and Vogelsang will make the pump chamber components in duplex steel or a nickel-based alloy on request. Heat treatment and wear-resistant coatings are available for the wear plates and the housing components.
Hazardous areas
Vogelsang states that an ATEX-compliant version can be supplied for use in areas subject to explosion hazards. That is an option you specify, not a property the range carries, and certification applies to a specific build rather than to a series. Send us the zone classification for the area and the medium it is handling, and we will get the documentation for the exact pump from Vogelsang before you order.
Specifications
| Models | IQ112, IQ152 | |
|---|---|---|
| Flow rate | IQ112 up to 78 m³/h; IQ152 up to 154 m³/h | |
| Pressure | up to 7 bar | |
| Pump housing | Single component, dismounted without removing the pump from the pipe | |
| Lobes | HiFlo rotary lobes | larger lobes and pump cover fit without modification |
| Capacity increase | up to 40% | Vogelsang figure, with larger HiFlo lobes and pump cover |
| Foreign matter protection | InjectionSystem | |
| Dry running | Resistant | Vogelsang attributes it to a fluid reservoir and the gearbox housing design |
| Shaft seal | Quality Cartridge | pre-assembled and factory-checked mechanical seal cartridge |
| Pump chamber materials | Abrasion-resistant grey cast iron, ADI, stainless steel | duplex steel or nickel-based alloy on request |
| Wear plates and housing components | Heat treatment and wear-resistant coatings available | |
| Parts changed on site | Rotary lobes, wear plates, pump housings, seals | without dismounting the pump |
| Connections | Variable series connecting parts | suit common installation situations including tank vehicles and mobile units |
| Draining | Drain plug for near-complete draining of the pump chamber | |
| Hazardous area | ATEX-compliant version can be supplied | option; certification covers a specific build |
Send us the flow, the differential pressure across the pump, the medium and what is in it, and the temperature. We will size the IQ112 or the IQ152 against it, or tell you the duty belongs on another Vogelsang range. If the area is classified, give us the zone and the medium at the same time so the ATEX build is quoted from the start rather than added later.
Documents & downloads
Related pumps
View all →
Frequently asked
What flow rate and pressure does the Vogelsang IQ series cover?
Up to 154 m³/h at pressures up to 7 bar across the series. The IQ112 reaches 78 m³/h and the IQ152 reaches 154 m³/h, both to the same 7 bar ceiling. Those are series maxima rather than duty points, so the pump still has to be sized against your curve.
What models are in the Vogelsang IQ series?
Two. The IQ112 is the universal model and the IQ152 is the larger one. Vogelsang builds both on the same simplified design, so the difference between them is capacity rather than capability.
What is the difference between the IQ series and the VX series?
Parts count. Vogelsang cut the IQ down to a few individual elements, and its pump housing is a single component that comes off in a few movements while the pump stays in the pipe. The VX housing is built up from more parts, and the VX runs to five model ranges against the IQ's two. Specify the IQ when the duty fits inside 154 m³/h and 7 bar, and the VX when it does not.
Can a Vogelsang IQ pump run dry?
Vogelsang lists the series as resistant to dry running, from a fluid reservoir, the gearbox housing design and the InjectionSystem. Treat that as tolerance, not licence. A mechanical seal needs liquid to lubricate it, so persistent dry running still costs you the seal, and it means the suction conditions need fixing rather than the pump.
Is the Vogelsang IQ series available for hazardous areas?
Vogelsang states an ATEX-compliant version can be supplied for use in areas subject to explosion hazards. Certification covers a specific build rather than the range, so send us the zone classification for the area and the medium, and we will get the documentation for your exact pump from Vogelsang.
Can an IQ pump be uprated after it is installed?
Larger HiFlo lobes and a larger pump cover fit the IQ without any other modification, and Vogelsang states the change gives up to 40% more pumping capacity. It is a reason not to add margin at specification, because the headroom can be bought later if the duty grows.