Mazzei Venturi

Mazzei Venturi injectors are differential pressure injectors with internal mixing vanes and no moving parts, drawing oxygen, ozone, air or liquid chemicals into a pressurised water line. The patented design starts suction once the outlet pressure is only 20% below the inlet pressure on most models, and the thousands of micro bubbles it creates give very high gas transfer. Five bodies are stocked, from 20 mm up to 3in BSPT.

Price range: $120.00 through $1,200.00 ex GST

Option

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Categories: Aeration, Oxygen & Ozone

Applications: Hatchery, LSS, RAS, Water & Wastewater Treatment

Brand: Mazzei

Product Information

Key Features

Differential pressure injector with internal mixing vanes and no moving parts, so there is nothing to wear out or service
Patented Mazzei design starts suction when the outlet pressure is only 20% lower than the inlet pressure on most models
Creates thousands of micro bubbles, giving far more gas-to-liquid surface area than a single large bubble of the same volume
Injects oxygen, ozone, air, carbon dioxide or liquid chemicals into a pressurised water line
High transfer efficiency keeps running costs below less efficient contact methods
Five bodies from 20 mm to 3" BSPT, with barbed or threaded suction ports to suit the gas supply
Sized on motive water flow and the pressure drop across the injector, not on pipe size — you need at least a 20% drop from inlet to outlet before suction starts, so pick the body whose flow range matches your pump duty at that available differential

Specifications

Model	SKU	Inlet / outlet	Suction port	Motive water flow and pressure drop
684	684	20 mm BSPT	6 mm barbed / MNPT threaded	Performance curve on request; suction from a 20% inlet-to-outlet drop
978	978	25 mm BSPT	12 mm barbed / MNPT threaded	Performance curve on request; suction from a 20% inlet-to-outlet drop
1584A	1584A	40 mm BSPT	12 mm barbed / MNPT threaded	Performance curve on request; suction from a 20% inlet-to-outlet drop
2081A	2081A	50 mm BSPT	32 mm MNPT threaded	Performance curve on request; suction from a 20% inlet-to-outlet drop
3090	3090A	3" BSPT	Dual 1.5" male BSPT threaded	Performance curve on request; suction from a 20% inlet-to-outlet drop

Frequently Asked Questions

What water flow and pressure drop do I need?

Size on motive water flow through the injector and the inlet-to-outlet pressure drop — most models begin drawing gas once the outlet pressure is at least 20% below the inlet pressure, so tell us your pump flow and available differential and we will confirm the model and its flow range.

Can it inject oxygen or ozone?

Yes — it is used for oxygen, ozone, air, carbon dioxide and liquid chemicals, and the micro bubbles it creates greatly increase the gas-to-liquid contact area.

How do I choose between the five models?

Match the injector to your motive water flow at the available pressure drop, then check that the inlet, outlet and suction connections suit your pipework.

Why does it need a pressure drop at all?

It is a differential pressure injector — the drop across the venturi is what creates the vacuum that draws gas in through the suction port.

Does it have any moving parts?

No — there are no moving parts, which is why the injectors are effectively trouble-free in service.

What suction connections are available?

6 mm and 12 mm barbed or MNPT threaded ports on the smaller bodies, a 32 mm MNPT port on the 2081A, and dual 1.5″ male BSPT ports on the 3090.

Why are micro bubbles better than large bubbles?

Many micro bubbles carry far more surface area than one large bubble of the same volume, so gas transfers into the water much more efficiently.

Spare Parts & Consumables

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Mazzei Venturi

Product Information

Key Features

Specifications

Frequently Asked Questions

Spare Parts & Consumables

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