PUMPS FOR USE IN CORROSIVE ENVIRONMENTS

Horizontal and vertical pumps in anti-corrosive material

Pumps for use in corrosive environments

The range of pumps made of plastic material is suitable for use in contact with the most aggressive fluids and includes horizontal centrifugal pumps with mechanical sealing, magnetic drive, available in various vertical models and with drum transfer, all made and sized in a wide range of flow rate and head.

Pompe orizzontali per ambienti corrosivi

HORIZONTAL PUMPS FOR USE WITH CHEMICALS

Magnetic Drive (HTM) or Mechanical Seal (PMC) Centrifugal Pumps in Thermoplastic Material. Industrial Anti-Corrosion Pumps Suitable for Pumping Acids, Bases, and Highly Aggressive and Corrosive Fluids, Even in Extreme Operating Conditions

Pompa a trascinamento magnetico HTM in materiale termoplastico per ambienti corrosivi

HTM-HTMD

Made of Polypropylene (PP) or in PVDF, this model is guaranteed for use with a very wide range of chemicals at temperatures up to 90°C. It features high magnetic torque and extreme ease of maintenance. No metal parts come into direct contact with the liquid being pumped.

PMC-1

Made of Polypropylene (PP), PVC or PEHD, this model is guaranteed for use with a very wide range of chemicals at temperatures up to 80°C. It features high magnetic torque and extreme ease of maintenance. It comes with single or double flush seal. No metal parts come into direct contact with the liquid being pumped.

Pompa centrifuga orizzontale serie PMC in materiale termoplastico per ambienti corrosivi

PMC-2

Made of Polypropylene (PP), PVC or PEHD, this model is guaranteed for use with a very wide range of chemicals at temperatures up to 80°C. With single or double flush seal and packaged design for high flow rates, it features extreme ease of maintenance. No metal parts come into direct contact with the liquid being pumped.

Pompa verticale VL in materiale termoplastico per ambienti corrosivi

VERTICAL PUMPS FOR USE WITH CHEMICALS

Vertical Centrifugal Pumps for Use in Corrosive Environments for Liquids with Solids or Moderate Abrasiveness, from the VSK Series with Cantilever Shaft to the VL/VLK Series with Heights up to 2500 mm. Constructed entirely from thermoplastic material, they are guaranteed for a wide range of chemical products

Pompa verticale VSK in materiale termoplastico per ambienti corrosivi

VSK

Cantilevered motor shaft with no connections, no shaft guidance system. Extreme ease of maintenance. No metal parts come into direct contact with the liquid being pumped.

Pompa verticale VGA in materiale termoplastico per ambienti corrosivi

VGA

Made of Polypropylene (PP), PVC, PVDF or PEHD, this model is guaranteed for use with a wide range of chemicals at temperatures up to 90°C.

VL

Made of Polypropylene (PP), PVC or PVDF, this model is guaranteed for use with a very wide range of chemicals at temperatures up to 90°C. Shaft end guide with ceramic bushing.

EVFA

Cantilevered motor shaft with no connections, no shaft guidance system. Extreme ease of maintenance. No metal parts come into direct contact with the liquid being pumped.

Pumps for corrosive liquids: choosing the right model

At Flero (Brescia, Italy), Nuova Darimpianti designs and builds chemical pumps and industrial pumps for corrosive liquids, machined from solid PP, PVC, PVDF and HDPE. In every model no metal part comes into contact with the pumped liquid, which is why they are used as plastic pumps for acids, alkalis and aggressive liquids in the chemical, pharmaceutical, steel, electroplating, energy and tanning industries. Choosing a model starts with three questions: how the pump will be installed, how hazardous the fluid is, and whether it contains solids.

Horizontal centrifugal pumps with mechanical seal

The PMC-1 and PMC-2 are installed alongside the tank and fitted with a single or double flushed mechanical seal. Built in PP, PVC or HDPE, they cover transfer, recirculation and process feed duties. The PMC-2 is the monobloc version for high flow rates.

Magnetic drive pumps

The HTM has no mechanical seal: torque reaches the impeller through a magnetic coupling with a sealed containment shell. In PP or PVDF, up to 90 °C, it is the model to choose among pumps for hazardous liquids when a leak is not acceptable. It needs clean liquids and must not run dry.

Tank-mounted vertical pumps

Vertical pumps work with the casing submerged and have no suction line to prime. The VSK has a cantilever shaft with no guides and suits liquids with solids or moderate abrasiveness. The VGA, in PP, PVC or PVDF up to 90 °C, adds a ceramic shaft end guide. The VL/VLK reaches 2500 mm in length, with a bearing lantern and elastic coupling. The EVFA-N, an external flushed vertical pump in PP with a 1450 rpm motor, is built for large transfers and continuous low-head recirculation.

What we need to recommend a pump

To propose the right pump we need the fluid and its concentration, the operating temperature, any solids content, the flow rate, the head and the type of installation. From there we define model, material and seal arrangement.

Frequently asked questions

Magnetic drive or mechanical seal?

The HTM magnetic drive pump removes the risk of seal leakage and is preferred for hazardous, clean fluids. The mechanically sealed PMC pumps cope better with variable operating conditions; a double flushed seal adds a barrier to the outside.

When is a vertical pump the better choice?

When drawing from a tank or an open vessel accessible from the top. The pump always has a flooded inlet and there are fewer potential leak points.

Which material for acid pumps?

It depends on the acid, its concentration and the temperature. PP is the most versatile, PVDF offers the broadest chemical resistance; compatibility is checked against a chemical resistance chart.

WHY CHOOSE US?

Industrial pumps operating in corrosive environments are subject to a number of issues due to the aggressive conditions under which they work. To address these problems, Darimpianti carefully selects the pumps and materials appropriate to the type of corrosive fluids existing in the working environment, including taking preventive measures such as corrosion protection, regular monitoring and routine maintenance.

Corrosion

Persistent exposure to corrosive chemicals can cause damage to the pump casing. Corrosion can erode the internal and external surfaces of pumps, thereby reducing their efficiency and life span.

Accellerated wear

The corrosive action of fluids can accelerate the wear of pump moving parts, such as shafts, bearings, and seals. This can lead to reduced performance and frequent maintenance or replacement of parts.

Leaks

Corrosion of seals and gaskets can cause leakage of fluids. Leaks not only result in lost material, but also result in contamination of the surrounding environment or cause damage to adjacent equipment.

Sealing

Corrosive substances can affect the tightness of pump connections and joints. This can lead to pressure loss or unwanted air ingress, thereby compromising the efficiency of the pumping system.

Clogging

Some corrosive substances can form solid deposits or precipitate that can clog the pipes and the internal components of pumps, which can reduce the flow of fluids and block or interrupt pump operation.

Material compatibility

Incorrect material selection or choosing materials that are not fully compatible with the fluids can still lead to corrosion problems or undesirable chemical reactions.

MORE INFO?

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PUMPS FOR USE IN CORROSIVE ENVIRONMENTS