In demanding pump applications, material science and engineering matter, but so does the manufacturing process behind the material. For end users evaluating non-metallic centrifugal process pumps, the difference between Bulk Molded Compound (BMC) and Resin Transfer Molding (RTM) Thermosets can have a major impact on cost, lead time, quality consistency, downtime, and longevity.
At MDM Pumps, our B73lean® pump platform is built around a simple idea: deliver the performance end users need without unnecessary complexity, excess components, or inflated total cost of ownership.
The Advantage of Bulk Mold Compounds (BMC) Thermoset Compression Molding
One of the biggest advantages of BMC thermoset compression molding is production efficiency. Depending on part size, MDM’s BMC components can be manufactured in as little as 10 to 30 minutes—from raw material to finished mold-to-net part. Because the process produces components at part design dimensions, no secondary processing is required.
By comparison, resin transfer molded (RTM) components often require approximately 24 hours of cure time before additional manufacturing operations can even begin. Once cured, parts typically undergo secondary and tertiary processes such as routing, trimming, drilling, and CNC machining to achieve final dimensions. The result is a significantly longer production cycle, increased labor requirements, and additional manufacturing costs that ultimately impact lead times and product pricing.
For the end user, that translates into practical benefits:
- Shorter manufacturing lead times
- Reduced production cost
- Better repeatability in quality control
- Fewer opportunities for process variation
- Faster availability of replacement components
- Strong, corrosion-resistant non-metallic construction
Why RTM Adds Complexity
Resin transfer molding can produce composite pump components, but the process often requires more secondary and tertiary finishing after molding. Post-processing steps such as CNC machining, routing, trimming, drilling, and additional hardware assembly can add time, labor, cost, and variability.
That matters because every additional process step introduces another opportunity for delay, dimensional variation, and added expense.
In many RTM-based pump designs, this complexity also shows up in the finished product: more hardware, more fasteners, more assembly steps, and more maintenance points.
For pump end users, that can mean:
- Higher acquisition cost
- Longer production and delivery timelines
- More components to inspect and maintain
- Potential for tolerance drift defect
- Increased downtime when service is required
B73lean®: Designed to Remove What End Users Don’t Need
B73lean® takes a more practical approach by focusing on what truly impacts performance and operating cost—hydraulic efficiency, corrosion resistance, reliability, maintainability, and total cost of ownership.
While the B73lean® platform streamlines pump construction and eliminates unnecessary complexity, it still maintains ANSI B73 pump case dimensional compatibility for interchangeability and commonality. This allows B73lean® pumps to serve as a drop-in replacement for traditional ANSI process pumps, often eliminating the need to modify existing suction and discharge piping during pump replacement.
The result is a pump that delivers the installation convenience of a traditional ANSI pump while providing a more compact footprint, fewer components, simplified maintenance, and lower lifecycle costs. Instead of paying for features dictated by decades-old specifications, end users benefit from a design optimized for modern process requirements and real-world operating efficiency.
Simpler Design. Fewer Components. Lower Cost of Ownership.
The B73lean® design reduces complexity by eliminating unnecessary hardware and minimizing component count. Its close-coupled, direct back pull-out design completely eliminates alignment and calibration issues often associated with traditional frame-mounted pump installations.
That simplicity pays dividends throughout the life of the pump.
Fewer parts mean fewer maintenance points. Fewer fasteners mean easier service. A smaller footprint means easier installation. Smooth, resin-rich thermoset surfaces contribute to efficient flow and compatibility with many aggressive chemistries.
Genesys pumps are engineered with no wetted metal parts, providing corrosion resistance in applications where metallic materials can be costly, vulnerable, or overbuilt.
The Economic Case for BMC Thermosets
The economic advantage of MDM’s BMC thermoset pump platform becomes clear when comparing real-world pump selections against RTM-manufactured alternatives. Across the duty points reviewed in the examples to follow, Genesys® pumps delivered a lower list price, higher hydraulic efficiency, and shorter lead time than comparable RTM pump options.
For example, at 135 GPM @ 45 FT, the MDM Genesys® 3×2-6 was listed at $10,000 compared to $20,200 for the competing RTM pump—more than a 50% lower list price—while also improving efficiency from 60% to 78% and reducing lead time from 12 weeks to 2 weeks.
This is where BMC thermoset compression molding creates measurable value. Because MDM’s BMC components are molded to net dimensions, the process reduces secondary operations, minimizes excess components and assemblies, and supports faster, more consistent production. RTM-manufactured pumps, by contrast, often require longer cure times and additional routing, CNC machining, trimming, and finishing before final assembly.
For end users, the equation is straightforward: lower upfront cost, superior operational efficiency, shorter lead times, fewer components, and easier maintenance all contribute to a lower total cost of ownership. Genesys pumps are not simply an alternative to RTM construction—they represent a more efficient manufacturing and operating model for modern pump applications.
A Smarter Alternative for Modern Facilities
RTM-based pump construction may meet the needs of some applications, but it often introduces manufacturing and design inefficiencies that end users ultimately pay for through op-ex, hydraulic efficiency, longer lead times, higher costs, additional maintenance, and unnecessary complexity.
Genesys B73lean® technology offers a more streamlined alternative.
They are designed to be efficient to produce, efficient to install, efficient to maintain, and efficient to operate.
That is the B73lean® advantage: a pump that does more of what matters—and less of what does not.
The Genesys B73lean® Difference
At MDM Pumps, we believe integrity is built into the product from the beginning. That means engineering pump solutions that are strong, simple, efficient, and valuable to the customer over the entire life of the installation.
With BMC thermoset construction and B73lean® design, MDM is helping professional pump users reduce complexity, lower lifecycle cost, and move toward a more practical standard of pump performance.
Looking for a non-metallic centrifugal pump solution built for efficiency, corrosion resistance, and long-term value? Contact MDM Pumps to learn more about B73lean® technology and our portfolio of thermoplastic and thermoset pump solutions.
