V-65 Diaphragm Vacuum Pump — High-Flow Oil-Free PTFE with 65 L/min and 8 mbar for Demanding Laboratory Conditions

The V-65's 65 L/min maximum flow — nearly double the V-40's 35 L/min — enables faster initial evacuation of larger vacuum systems, supports simultaneous high-flow vacuum supply to multiple connected processes, and maintains stable vacuum during high-vapour-generation processes such as active large-scale solvent evaporation and continuous high-throughput filtration. The high-flow design is achieved through optimised pump head geometry and direct drive motor specification at 400W — providing the mechanical power required for reliable 65 L/min pumping against the full 8 mbar to 1 bar operating pressure range.

The V-65's PTFE composite diaphragm processes the largest volume of corrosive laboratory vapour per unit time of any model in the compact V Series — making the PTFE material's long-term chemical resistance to acid vapours, halogenated solvents, and reactive gas streams proportionally more important for service life and consistent performance. In demanding pharmaceutical and chemical laboratory environments where the V-65 may process corrosive vapours continuously throughout the working day, PTFE's near-universal chemical inertness provides the operational reliability that standard rubber or silicone diaphragm materials cannot deliver under sustained corrosive gas exposure.

The V-65 provides 65 L/min of clean, oil-free vacuum — free from the hydrocarbon mist contamination that would otherwise be carried into the vacuum system at proportionally higher volumes by an equivalent-flow oil-sealed rotary vane pump. At 65 L/min flow rate, the oil mist issue of a conventional rotary vane pump would be substantially more problematic than at lower flow rates — more oil mist per unit time reaching connected analytical instruments and process equipment. The V-65's oil-free design eliminates this risk at the higher flow scale.

Despite its higher 400W operating power, the V-65 maintains the V Series' characteristic low-vibration and quiet operation — achieved through direct drive diaphragm mechanism design optimisation appropriate for the higher pumping capacity. Low vibration at 65 L/min is a more demanding engineering requirement than at 20 L/min — the V-65's mechanism design addresses this to maintain laboratory-compatible acoustic and mechanical performance standards across the higher flow capacity.

The V-65's direct electric drive system connects motor output directly to the diaphragm mechanism at 400W — providing reliable, consistent 65 L/min performance throughout the continuous operating cycle without belt-related performance degradation. In demanding pharmaceutical and chemical laboratory environments where the V-65 operates under sustained high-flow conditions throughout the working day, the direct drive system's absence of mechanical transmission wear components ensures consistent vacuum performance without the progressive flow rate decline associated with belt wear in indirect drive diaphragm pumps.

The V-65 uses a 12 mm interface specification — compared to the 10 mm interface of the V-20 and V-40 — providing larger-bore inlet connections that reduce pressure drop at the pump inlet during high-flow operation. At 65 L/min, the pressure drop through the inlet connection is proportionally greater than at 20 or 35 L/min, and maintaining a low-resistance inlet path through the wider 12 mm interface directly supports the pump's ability to achieve its rated flow rate and ultimate vacuum in connected systems. The 12 mm interface is compatible with standard laboratory vacuum tubing in the appropriate bore size.