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The V-20 Diaphragm Vacuum Pump is a compact, oil-free, maintenance-free vacuum pump designed for clean laboratory vacuum applications requiring strong chemical resistance to corrosive gas environments. Featuring a PTFE composite diaphragm, PTFE pump head, and FPM valve construction — the V-20 provides comprehensive chemical resistance across the full range of laboratory solvents and corrosive gases encountered in chemical, pharmaceutical, and analytical laboratory vacuum applications. With 20 L/min maximum flow, 8 mbar ultimate vacuum, a two-stage pump head design for reliable deep vacuum performance, direct electric drive for stable continuous operation, and compact low-vibration construction — the V-20 delivers oil-free, contamination-free vacuum without the maintenance requirements of conventional oil-sealed rotary vane pumps. Enquire about the V-20 today.
The V-20 Diaphragm Vacuum Pump integrates a PTFE composite diaphragm, PTFE pump head, FPM valves, oil-free two-stage design, quiet low-vibration electric direct drive, and compact construction — delivering 20 L/min of clean, contamination-free vacuum at 8 mbar ultimate pressure for laboratory filtration, pharmaceutical processes, vacuum drying, and corrosive gas handling applications.
The V-20's diaphragm is constructed from PTFE (polytetrafluoroethylene) composite — a material specifically selected for its near-universal chemical inertness across all standard laboratory solvents, corrosive acids, aggressive bases, halogenated compounds, and reactive gases. PTFE composite diaphragms resist swelling, permeation, and degradation from the full range of chemicals commonly processed through laboratory vacuum systems — maintaining their mechanical integrity and vacuum sealing performance throughout extended service in environments that would rapidly degrade rubber or standard polymer diaphragms. This chemical resistance is the defining performance advantage of the V-20 for corrosive gas handling applications.
The V-20 operates entirely without lubricating oil — eliminating the oil mist contamination of the vacuum stream that occurs in conventional oil-sealed rotary vane pumps and the periodic oil changes required for maintaining rotary vane pump performance. Oil-free operation ensures that the vacuum pulled by the V-20 does not carry hydrocarbon vapour contamination into the connected vacuum system — critical for pharmaceutical process vacuum, analytical instrument vacuum supply, and any application where oil contamination of the vacuum stream would compromise product quality or analytical results. Oil-free operation also eliminates the disposal requirements and handling hazards associated with used vacuum pump oil.
The V-20 operates with low acoustic noise and minimal vibration — a practical advantage in shared laboratory environments where continuous vacuum pump operation could create acoustic disruption to adjacent workstations and sensitive analytical instruments. The diaphragm pump mechanism's inherently lower vibration generation compared to rotary vane pumps reduces the risk of vibration interference with sensitive balances, spectrophotometers, and microscopy equipment sharing the same bench or laboratory space during continuous vacuum pump operation.
The V-20's compact exterior dimensions (165 × 315 × 210 mm) make it the most space-efficient model in the V Series — suitable for placement on a laboratory bench directly alongside the equipment it serves, under a fume hood, or on a cart adjacent to filtration assemblies and vacuum drying ovens. The lightweight design enables easy repositioning between different laboratory workstations as vacuum requirements change, without the heavy lifting associated with larger vacuum pump units.
The V-20's electric direct drive system — where the motor directly drives the diaphragm mechanism without belts, pulleys, or gear reduction — provides stable, consistent performance throughout the V-20's continuous operating duty cycle. Direct drive eliminates the belt wear and tension loss that progressively degrade the performance of belt-driven diaphragm pumps, providing consistent vacuum performance without the periodic belt tension adjustment and replacement maintenance requirements of indirect drive systems.
The V-20's PTFE pump head, PTFE composite diaphragm, FPM (fluoroelastomer) valves, and oil-free design collectively make it the appropriate vacuum pump for handling corrosive gas environments — including acidic vapours from concentrated acid solutions, halogen gas environments, solvent vapour from chlorinated solvents, and other aggressive chemical atmospheres that would cause rapid degradation of standard rubber-diaphragm or oil-sealed vacuum pumps. The FPM valve material provides additional chemical resistance to complement the PTFE structural components in the most challenging corrosive gas applications.
The V-20 Diaphragm Vacuum Pump incorporates three safety systems — overheat protection with automatic shutdown, contamination-free oil-free stable operation, and a safe reliable motor design — ensuring safe continuous laboratory vacuum operation across chemical, pharmaceutical, and corrosive gas handling applications.
The V-20's motor incorporates overheat protection that automatically shuts down the pump if the motor temperature exceeds the safe operating limit — protecting the motor windings, diaphragm, and pump head components from thermal damage during extended continuous operation or if airflow around the pump is restricted. Overheat protection is particularly important for a pump designed for continuous operation duty cycle — where prolonged operation under elevated ambient temperatures or restricted ventilation could otherwise result in motor failure during unattended vacuum processing sessions.
The V-20's oil-free design provides inherently safe operation from a contamination standpoint — eliminating the risk of oil mist entering the vacuum system and contaminating filtered samples, pharmaceutical products, or analytical instrument vacuum lines. This contamination-free operation is not only a performance advantage but a safety feature for pharmaceutical and food-contact applications where oil contamination would represent a product quality failure with regulatory consequences, and for analytical applications where oil contamination of instrument vacuum lines could damage sensitive detector components.
The V-20's direct drive motor is designed for reliable, safe continuous operation at 120W within the specified ambient conditions (5–40°C, ≤80% RH) — with insulation, winding specifications, and thermal management appropriate for the continuous duty cycle of laboratory vacuum applications. The reliable motor design ensures consistent vacuum performance without the random interruptions from motor faults or thermal trips that would compromise time-sensitive filtration, vacuum drying, or rotary evaporator condensing operations.
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