A vacuum holding system needs to maintain the required pressure while air leaks through the workpiece, seals or table. For CNC routing, woodworking and suction-cup handling, the useful questions are how much air enters the system and how quickly the required vacuum must be established.
Choose by working duty, not ultimate vacuum alone
The lowest pressure a pump can achieve with a closed inlet does not tell you how it will perform on a porous spoilboard. Compare pumping speed at the intended operating pressure, the permitted continuous duty and the machine manufacturer’s requirements. Table area alone is not enough to size a pump.
| Technology | Where to start | Check before selection |
|---|---|---|
| Dry rotary vane | DVP SC family | Flow at the working pressure, allowable continuous duty, clean dry inlet air and dust filtration. |
| Lubricated rotary vane | DVP LC 25 and the wider LC family | Pressure/flow curve, operating limits, oil condition, inlet protection and exhaust arrangement. |
| Dry claw | Claw pump catalogue | Continuous pressure limit, leakage load, cooling and gearbox maintenance; a dry pumping chamber does not mean the whole pump contains no oil. |
Describe the workpiece and cycle
Tell us the material, porosity, active table zones, seal arrangement, existing machine model and number of handling points. Include measured operating pressure if available, the cycle time and whether uncovered zones can be isolated. For a replacement, send the pump nameplate and explain whether the current system maintains vacuum during the most demanding part of the cycle.
Gauges, switching and inlet protection
A vacuum dial gauge can provide local indication. An electronic vacuum switch can provide a signal at a specified set point, subject to the machine’s control design. Choose the range, pressure reference and connection before ordering.
Discuss inlet filtration for dust and debris, pipework restrictions and isolation of unused zones. If readings inform process checks, include the relevant points in a gauge calibration enquiry.
For lifting or other safety-related holding, the complete machine needs the appropriate engineering assessment, monitoring and response to loss of vacuum. Determine the load rating for the complete lifting or holding assembly.
Vacuum holding questions
Does a deeper ultimate vacuum mean better holding?
Not by itself. The system must sustain the required pressure under actual leakage. Compare the pump’s flow curve and continuous operating limit with the machine duty. Our selection guides explain the difference between pumping speed and ultimate pressure.
Can several machines share one pump system?
Possibly, where duties and contamination levels are compatible. Review simultaneous demand and the effects of a leaking or disconnected line using our central vacuum system guide.
Which DVP pump should replace my existing model?
Start with the exact model, electrical version and working duty. Browse the DVP families, then send your replacement details. Matching nominal flow alone is not enough.
Get help with a vacuum holding pump
Send the machine model, workpiece material, operating pressure, cycle and electrical supply. Include any change in performance so we can distinguish a replacement requirement from a system problem.
Manufacturer references: DVP SC dry rotary vane applications and DVP LC clamping applications. Individual models must be checked against their own operating data.
Build the pump, measurement and protection enquiry
Compare DVP SC dry rotary vane pumps, DVP LC lubricated pumps and Edwards EDO industrial scroll pumps against the machine’s pressure and leakage requirements. For dusty duties, discuss FBO inlet filtration; the filter must be sized for the pump and process.
A Thyracont VD810 can help with portable rough-vacuum checks. Machine control or vacuum lifting may require dedicated switches, alarms and safety provisions beyond a portable reading.
Prepare a complete installation enquiry with the pump, gauges, protection and connections listed together.