Brullen i91 Pro Soft Serve Machine Air Pump Non-Pasteurise I91PRO-NP-AMP

The Brullen i91 Pro is a single-flavour countertop soft serve machine rated at 250 to 500 serves per hour. This is the air-pump build running 40% to 80% overrun — lighter product and far more yield per litre than gravity feed — and it is the only i91 Pro build that offers an optional 20 litre mix tank in place of the standard 12 litre. It needs a 15 A dedicated circuit.

Why operators choose the I91PRO-NP-AMP

• An optional 20 litre mix tank — recorded on this build only. On a machine turning out up to 500 serves an hour, a larger hopper means fewer refills mid-service - ask us about the option if you run long peaks
• Air pump: up to 80% overrun — close to 1.8 litres of finished product per litre of mix at the top of the range, against 1.45 at the top of gravity feed
• A 15 A dedicated circuit — dedicated is the operative word - a soft serve compressor cycles hard and continuously, and sharing the circuit invites nuisance tripping mid-service
• Air pump: 40% to 80% overrun — the pump forces air into the mix, so you get a lighter, classic soft-serve texture AND materially more product per litre. At 80% overrun a litre of mix yields roughly 1.8 litres of finished product, which is where the machine pays for itself
• Soft-touch operator menu — the controls a staff member actually uses, on a sealed panel that survives a sticky bench
• POM plastic scraper blades — the blades scrape the frozen layer off the cylinder wall. Plastic rather than steel means they wear instead of the cylinder
• R404a refrigerant, air-cooled condenser — no plumbing for the condenser - but it does need airflow around it

Specifications

Venue suitability

This is the high-yield build of the i91 Pro, for cafes and dessert bars where soft serve is a volume line rather than an add-on. If you run long peaks, ask about the optional 20 litre tank — it is recorded on this build and not on the gravity-feed one.

See the full ice cream frozen yoghurt machines range or browse every Brullen model we carry.

Installation & delivery

A 15 A dedicated circuit is required. Dimensions are recorded width x depth x height: 400 x 750 x 840 mm, weighing 120 kg (135 kg crated) — heavy for a bench, so confirm what your counter is rated to carry and plan how it gets up there. The air-cooled condenser needs clear airflow around it.

Warranty terms are per product — see our warranty information page.

Frequently asked questions

Q: What is overrun, and why does it matter more than anything else here?

Overrun is the percentage of air whipped into the mix. It sets both the texture and your yield. A gravity-feed machine runs 15-45% overrun and gives a denser, gelato-like product; an air-pump machine runs 40-80% and gives classic light soft serve. The commercial consequence is the yield: at 80% overrun one litre of mix becomes roughly 1.8 litres of finished product, where at 20% it becomes 1.2. If you are comparing a gravity-feed and an air-pump version of the same machine, that is the difference you are actually choosing between.

Q: Can I get a bigger mix tank?

Our data records a 20 litre tank as an option on this air-pump build, in place of the standard 12 litres. It is not recorded as an option on the gravity-feed version. Ask us to confirm availability and pricing before ordering - on a machine doing up to 500 serves an hour, the difference is how often someone has to stop and refill.

Q: Should I choose air pump or gravity feed?

Yield and texture. This build runs 40-80% overrun for light, classic soft serve and roughly 1.8 litres of product per litre of mix at the top end. The gravity-feed i91 Pro runs 15-45% for a denser, gelato-style result and less yield. If your margin depends on serves per litre, this is the commercial choice.

Q: What electrical supply does it need?

A 15 amp dedicated circuit. Dedicated matters more than the number - the compressor cycles continuously through service and sharing the circuit is how a breaker trips mid-rush.

Q: Does it need plumbing or extra ventilation?

The condenser is air-cooled, so there is no water connection for cooling - but it does need clear airflow around it, and boxing it into a tight cabinet will cost you capacity on a hot day. Our data does not record a ventilation clearance figure for this model, so check the equipment manual or ask us before you build it into joinery.

Q: What is the scraper blade made of and why does that matter?

POM plastic. The blades scrape the frozen layer off the inside of the freezing cylinder thousands of times a day, and the choice of material decides what wears out. Plastic blades wear instead of the cylinder, so the consumable is a cheap replaceable part rather than the machine itself.