How to Choose the Right Vacuum Pump for Industrial Applications

Vacuum pumps rarely get much attention until they stop working — and by then, the cost is already showing up somewhere else: a packaging line that can’t hold a bag open, a CNC table that won’t clamp a part securely, a forming process that comes out inconsistent. The pump itself is a small piece of the operation, but the wrong setup can quietly undermine process efficiency, product quality, and energy spend for years. 

Choosing the right vacuum pump approach up front minimizes downtime, keeps maintenance costs predictable, and ensures the system performs consistently under real production conditions — not just on a spec sheet. For many facilities, that means rethinking a setup they may not have questioned in years: relying on a scattered fleet of small vane pumps instead of a single, right-sized rotary screw system. Here’s how to think through that decision. 

Understanding Vacuum Pumps in Manufacturing 

At its core, a vacuum pump does one job: it removes gas molecules from a sealed volume to create a partial vacuum. What varies is how that vacuum gets used. Across industry, vacuum systems power packaging lines, forming and thermoforming processes, and clamping and hold-down applications. 

Because vacuum demand differs so widely by application, there’s no single setup that fits every operation well. But there’s a pattern worth paying attention to: many facilities have accumulated vacuum capacity one machine at a time, adding a small vane pump at each point of use as new equipment came online. It works, but it’s rarely the most efficient way to run a facility’s vacuum supply as a whole. 

Rotary Screw vs. Vane Pumps: Two Very Different Ways to Supply Vacuum 

The real comparison worth making isn’t between two rotary screw product tiers—it’s between how most facilities are actually running vacuum today and a better way to run it. 

The Default: A Fleet of Small Vane Pumps 

Vane pumps are common at the point of use because they’re simple to install one at a time: a machine needs vacuum, a small pump gets added right next to it. Repeat that across a facility for years, and you end up with a dozen or more individual units scattered across the floor — each with its own motor, its own wear parts, and its own maintenance schedule. 

Individually, that’s manageable. In aggregate, it adds up: more units drawing power independently rather than as one efficient system, more individual failure points, and more service calls spread across more machines. It’s a setup that grew organically, not one that was designed. 

The Better Approach: Centralize with Rotary Screw, Keep Vane Pumps as Backup 

FS-Curtis’s VSV Series rotary screw pumps are built for exactly the kind of continuous, facility-wide demand that a fleet of small vane pumps is really being asked to cover. Consolidating that demand onto one properly sized rotary screw system — and keeping the existing vane pumps in place as point-of-use backup rather than retiring them outright — tends to deliver three concrete benefits: 

• Energy savings. One efficient, right-sized rotary screw pump running continuously typically outperforms a dozen small vane pumps each running independently, since the system is no longer paying the efficiency penalty of many small motors operating in parallel. 

• Lower maintenance burden. Fewer units doing the primary work means fewer scheduled services, fewer wear parts to track, and less time spent chasing small problems across a wide footprint. 

• Better reliability. This is where keeping the vane pumps matters. Rather than removing them, they stay in place as redundancy — if the central rotary screw system needs service, the point-of-use vane pumps can keep critical processes running until it’s back online. You get the efficiency of centralization without giving up the built-in backup a distributed system provides. 

This isn’t an all-or-nothing swap. It’s a redesign of how the existing equipment works together. 

5 Key Factors to Consider When Selecting a Vacuum Pump 

Whether you’re centralizing an existing vane-pump fleet or specifying vacuum for a new line, the same factors drive the decision: 

• Required Vacuum Level. Applications fall into low, medium, and high vacuum categories, and the difference matters. Thermoforming, for example, typically needs a deeper vacuum than a basic pick-and-place system. 

• CFM and Flow Rate. Calculate the cubic feet per minute (CFM) your operation needs based on the tools in use, the number of machines running simultaneously, and your cycle times. This is especially important when consolidating several point-of-use pumps into one central system — the combined demand needs to be sized accurately, not estimated. 

• Duty Cycle. Will demand run constantly across the facility, or in short bursts at individual machines? Facilities with many separate, lower-duty applications are often the best candidates for centralization, since a single rotary screw pump can smooth out that combined demand more efficiently than many small units ever could. 

• System Integration. Consider how a centralized system fits into your existing setup: control panels, distribution piping, available space, and electrical requirements all factor into a workable installation. 

• Maintenance & Energy. A higher upfront investment in a rotary screw system typically pays for itself through lower long-term energy and labor costs — particularly when it’s replacing the combined draw of several aging vane pumps. 

Matching Pumps to Common Applications 

A few scenarios where this plays out in practice: 

• Packaging lines running fast-paced, high-volume bagging or bottling operations are strong candidates for a centralized rotary screw system — the continuous, high-flow demand is exactly what it’s built for. 

• CNC machining shops often start with one small vane pump per machine. As the number of machines grows, consolidating that demand onto a shared rotary screw system — with the original vane pumps left in place as backup — usually reduces both energy use and the number of things that can go wrong. 

• Food processing facilities running high-moisture, hygienic environments benefit from a centralized rotary screw supply for main production lines, while isolated, lower-demand points can still rely on individual vane pumps as needed. 

Whatever setup you land on, don’t overlook the accessories that support it — filters, liquid separators, and oil mist eliminators all play a role in system performance and equipment longevity, and they should be sized and selected alongside the pump itself, not as an afterthought. 

Why FS-Curtis Vacuum Systems Stand Out 

FS-Curtis engineers the VSV Series rotary screw pump for robust, dependable performance under continuous, facility-wide demand — low noise, strong energy efficiency, and equipment built to hold up under real industrial conditions. That engineering is backed by U.S.-based technical support and a broad distributor network, so help is never far away when you’re planning a system redesign or need service down the line. 

We Can Help You Choose the Right Vacuum Pump 

Vacuum system efficiency and reliability often come down to one decision: whether your facility is running vacuum as a collection of scattered, independent pumps, or as one well-designed system. If you’re running a fleet of small vane pumps today, there’s a good chance a centralized rotary screw approach — with your existing pumps kept on as backup — could save you money and reduce downtime at the same time. 

Talk to an FS-Curtis distributor about evaluating your current vacuum setup or finding the right path forward.