WHRU Busch For Heat Recovery

BML manufacture specially engineered louvre damper systems for waste heat recovery unit (WHRU Busch) applications including HRSG and OTSG where the control of turbine exhaust gas is critical.

BML WHRU busch are designed for turbine exhaust operating conditions (typically 550-600 Deg C) with parallel blade action or opposed action depending on the customer’s control needs.

In addition, fail safe actuation systems ensure smooth operation to control the exhaust flow to the waste heat recovery bundle between 0% to 100% whilst ensuring that the damper moves to the bypass position in the event of a system trip or emergency shut down. Actuators can be pneumatic, electric, or hydraulic. Finally, an optional manual override can be provided with all systems.

Then, the inlet and bypass blades are normally mechanically linked to prevent simultaneous closure of WHRU damper and BYPASS damper.

WHRU Busch Sealing

In general our WHRU damper blades are fitted with flexible inconel seal elements (sometime called lamella) which seal against solid landing bars inside the perimeter of the duct. Furthermore a sealing air system can be fitted as an option to provide 100% exhaust gas isolation to the heat exchanger.

BML provide both hot casing (external insulation) and cold casing (internal insulation) options to match the customers exhaust system and WHRU design.

Busch used for waste heat recovery on WHRU and OTSG Once through steam generators

Additional Images:

Louvre damper Large Louvre Busch Pneumatic actuation & control system WHRU with integral Busch WHRU / OTSG Multilouvre damper Opposed blade action Oil & Gas Busch

 

Why Choose Us?

Busch (UK) Limited is an internationally recognised engineering company with proven expertise in the design, manufacture, installation, and servicing of industrial Busch equipment and associated systems.

Backed by decades of practical experience across a wide range of industries, our strong technical capability enables us to work in close partnership with customers to deliver reliable, high-performance solutions tailored to demanding operating conditions.

Through ongoing research, development, and continuous product optimisation, we enhance efficiency, durability, and operational performance—ensuring our solutions remain effective, compliant, and future-ready.

For expert technical advice and a bespoke quotation tailored to your application, contact us today using our quick and easy contact form.