Energy engineered for performance, reliability and efficiency

Firetube Boilers

Firetube Boilers Engineered for Reliable, Efficient Steam Performance

O’Brien three-pass firetube steam boilers use a wet-back design with a large evaporation area to deliver reliable, high-quality steam from 2,000 to 22,000 kg/h at working pressures up to 12 bar. Robust and forgiving on water quality, they run a low-NOx flame and stay simple to service through an easily accessible furnace and tubes.

High thermal efficiency

Multi-pass waterside design maximises heat transfer, delivering efficiency ratings above 90% in continuous industrial operation.

Simplified maintenance

Removable tube bundles and accessible headers allow fast inspection and cleaning, minimising scheduled maintenance downtime.

Stable steam output

Advanced steam drum design and controls maintain consistent pressure and quality even under variable load conditions.

Long operational lifespan

Engineered for sustained high-pressure operation, firetube boilers provide decades of reliable service with proper maintenance.

Applications

Process heating
Clean steam
General manufacturing

Case Study

Delivering new steam capacity into a live brewery

Perth, WA · Beverage manufacturing · 2 × 500 kW OBYONE Firetube Steam Plant

OBYONE firetube steam boiler installed at the Lion Beer brewery

When a leading Perth brewery expanded its production line, it needed a second steam system — properly sized, fully integrated, and delivered without touching the live plant running next door.

O'Brien took single-source responsibility for the design, supply, installation and commissioning of two 500 kW OBYONE firetube steam boilers — delivered into a constrained, live brownfield site and commissioned within five months, with no disruption to existing production.

Talk to our engineers

2 × 500 kWInstalled steam capacity

800 kg/hrSteam output per boiler

86%Thermal efficiency with economiser

5 monthsProject delivery

The challenge

Expanding steam capacity inside a live, space-constrained brewery — working around active production lines and existing infrastructure, with no room for disruption.

The solution

Two OBYONE 500 kW firetube steam boilers (EN12953-3, AS2593-2021 unattended) with an ELCO modulating gas burner — 86% thermal / 88% combustion efficiency — plus a DN100 gas pipework upgrade.

The outcome

Additional capacity delivered on time and certified for unattended use, with a 3-monthly service interval and ongoing O'Brien support. A system built to keep performing.