Energy engineered for performance, reliability and efficiency

Watertube Boilers

High-Pressure Watertube Boilers for Large-Scale Industrial Operations

Australian-engineered as a D-type, two-drum design, O’Brien watertube boilers pair a membrane water-cooled furnace with micro-positive combustion for leak-free, high-efficiency operation. They deliver 4 to 25 t/h of steam — up to 16 MW — for facilities that need continuous output at scale.

Handles high-pressure

Designed and certified to operate at pressures exceeding 3,000 kPa, meeting the demands of power generation and heavy industry.

Rapid steam generation

Large heating surface area and optimised flow paths enable fast startup and quick response to load changes for demanding applications.

Ideal for large plants

Scalable from 2 to 50+ tonnes per hour steam output, suited to refineries, power stations, and large-scale manufacturing.

High durability under load

Thick-walled pressure vessels and certified welds ensure structural integrity under sustained high-temperature and high-pressure operation.

Applications

Utilities
High-demand manufacturing
Chemical processing

Case Study

Adding steam capacity inside a live food plant

Chullora, Sydney NSW · Food manufacturing · 2 × 6 MW OBY88 D-Type Steam Plant

Aerial view of the Primo Chullora food manufacturing facility

When Primo's Chullora facility needed more steam, the new plant had to be installed around production that could never stop — inside a tight footprint, with zero tolerance for downtime.

O'Brien took single-source responsibility for the supply, installation and commissioning of a complete 2 × 6 MW OBY88 D-type watertube steam plant — including economisers and heat recovery, deaerator and feedwater systems, and advanced boiler controls — engineered for the facility's exact production requirements and delivered without disrupting the live plant.

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12 MWSteam generation capacity

2 × 6 MWTotal installed output

5–10%Energy savings achieved

12 monthsProject delivery

The challenge

Increasing steam capacity inside an active food manufacturing facility that couldn't stop operating — with limited installation space, existing plant running at load, and zero tolerance for downtime.

The solution

A complete industrial steam plant — 2 × 6 MW OBY88 D-type boilers with economisers and heat recovery, deaerator and feedwater systems, and advanced controls — engineered specifically for the facility's production requirements.

The outcome

12 MW of new steam capacity delivered over a 12-month program with 5–10% energy savings — backed by operator training on live systems and ongoing O'Brien service support.