Desmi HD ROTAN® Pump: Solves the Asphalt/tar pumping puzzle, significantly saving on costs

Challenge: High cost, low reliability traditional pumps

Reliability engineers at a US roof panel manufacturer found that traditional asphalt pumps on 

their production lines were an operational pain point: high procurement and maintenance costs, 

and frequent failures led to the shutdown of the entire line. They urgently need more reliable alternatives.

Desmi's Solution: The Proven HD201 ROTAN® Pump

Charles Womack, Dysmi business manager, recommended the HD201 ROTAN® pump designed for

 rigorous testing. Goal: Run for 12 months without fault.

Excellent performance: far exceeding expectations

Long-lasting and stable: Since its installation in January 2019, the pump is still running at its initial 

speed after 16 months, and its performance has no attenuation (the traditional pump needs to be

 continuously speeded up and maintained until it is scrapped after wear).

Sharp maintenance reduction: Only 4 high-temperature graphite fillers have been replaced, but in 

the past it needs to be replaced every 1-2 weeks. This not only reduces maintenance costs, but also 

significantly reduces the risk of employees operating in high temperature environments of 230°C.

Design Advantages Behind Success

The success of the HD ROTAN® pump is derived from its features designed for asphalt/tar challenges:

True back-pull design: No need to disconnect pipes or drives, you can quickly pull out the entire 

rear rotating assembly for repair, without re-centering after repair, greatly reducing downtime.

Pipeline design (180° import and export):

The foot-mounted structure can better withstand pipe pressure and thermal expansion.

Easier to repair and maintain than the common 90° import and export design.

The overhead safety valve design avoids the problem of asphalt solidification (the jacketed valve is prone to blockage).

Efficient heating:

Front/rear heating jacket eliminates cold spots in key areas.

Optional electric heating rods are installed directly on the idler pin to accurately heat the core parts

 without the need for complex external hot oil/steam pipes, energy-saving and simplifying the system.

Modular design: Easy to maintain and replace parts.

Industry Trends and the Value of Desmi

More and more companies (such as roof manufacturing, road construction, and oil refineries) are 

beginning to examine traditional pumping solutions with high cost and low reliability. Deesmi offers:

Significant cost savings: By reducing downtime, reducing maintenance frequency and spare parts requirements.

Improved reliability: Designed for harsh working conditions, more stable and long-lasting operation.

Enhanced safety: Reduce maintenance operations in high temperature environments.

Professional partners: Desmi has global experience in asphalt/tar pumping, and is willing to communicate 

in-depth with customers, analyze needs together, and customize the most suitable solutions, ultimately

 achieving win-win cooperation and profit improvement.

Summary: The Dysmi HD ROTAN® asphalt/tar pumps effectively solve the high failure rate, high 

maintenance costs and safety hazards of traditional pumps through innovative back-pull-type, 

pipe-type design and efficient heating systems, bringing significant reliability improvement and 

operating cost savings to customers.