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The V-40 Diaphragm Vacuum Pump is the general-purpose mid-range model in the V Series — providing higher 35 L/min flow capacity than the compact V-20 while maintaining the same oil-free, PTFE-based anticorrosion construction, 8 mbar ultimate vacuum, and continuous operation reliability. Designed for the broader flow rate requirements of general laboratory vacuum applications — including vacuum filtration of larger sample volumes, medium-size rotary evaporator vacuum supply, chemical processing, and vacuum drying support — the V-40 combines PTFE pump head, PTFE composite diaphragm, FPM valves, direct drive motor, and low-noise low-vibration operation in a compact 170 × 330 × 210 mm footprint at 240W. Enquire about the V-40 today.
The V-40 Diaphragm Vacuum Pump delivers 35 L/min of oil-free clean vacuum at 8 mbar through a two-stage PTFE pump head with PTFE composite diaphragm and FPM valves — providing anticorrosion, maintenance-free, low-noise direct drive vacuum for general laboratory vacuum filtration, chemical processing, filtration and drying, and continuous use laboratory applications.
The V-40's PTFE composite diaphragm provides the same broad-spectrum chemical resistance as the V-20 — enabling reliable operation in environments containing acid vapours, halogenated solvent vapours, organic solvent mist, and other corrosive chemical atmospheres. At the higher 35 L/min flow rate of the V-40, the PTFE diaphragm processes proportionally larger volumes of corrosive gas per unit time than the V-20 — making the material's long-term resistance to chemical attack proportionally more important for maintaining consistent vacuum performance and extended service life in demanding chemical laboratory environments.
The V-40 operates without lubricating oil — providing clean, contamination-free vacuum at 35 L/min flow without the periodic oil change maintenance, oil mist trap management, and oil disposal requirements of conventional oil-sealed rotary vane pumps. Maintenance-free oil-free operation is particularly practical for the general laboratory use context of the V-40 — where multiple operators access and use the pump for diverse applications throughout the working day without the discipline of monitoring oil level and condition that oil-sealed pumps require for consistent performance.
The V-40 operates with low acoustic noise and minimal vibration — maintaining the laboratory-compatible acoustic and mechanical environment expected in shared multi-instrument workspaces. At 240W operating power — double that of the V-20 — the V-40's direct drive mechanism is engineered to maintain the same low-noise, low-vibration performance standard as the compact model, ensuring that the higher flow capacity does not come at the cost of increased acoustic or mechanical disruption to the surrounding laboratory environment.
The V-40's electric direct drive system eliminates belt and gear transmission losses — connecting the motor output directly to the diaphragm drive mechanism for maximum energy transfer efficiency at 240W rated power. Direct drive consistency translates to stable, predictable vacuum performance without the gradual performance drift associated with belt wear in indirect drive systems, providing reliable and reproducible vacuum conditions for general laboratory filtration and chemical processing applications that benefit from consistent, process-to-process vacuum stability.
The V-40's exterior dimensions (170 × 330 × 210 mm) represent only a modest increase over the V-20's footprint (165 × 315 × 210 mm) despite providing 75% more flow capacity — maintaining bench-mounting practicality for a mid-range general purpose laboratory vacuum pump. The reliable design — continuous duty rating, direct drive motor, PTFE/FPM chemical resistance, and overheat protection — ensures consistent performance across the diverse vacuum application types of a busy general laboratory environment without requiring specialised installation or dedicated service support.
The V-40 Diaphragm Vacuum Pump incorporates three safety systems — overheat protection, contamination-free stable vacuum operation, and a safe electrical motor design — providing reliable safe continuous vacuum for general laboratory, chemical processing, and filtration and drying applications.
The V-40's overheat protection system automatically shuts down the pump motor if the operating temperature exceeds the safe limit — protecting the 240W motor, PTFE diaphragm, and pump head components from heat damage during extended continuous operation or insufficient ventilation conditions. At 240W, the V-40 generates proportionally more heat than the V-20 — making overheat protection more important and the ventilation clearance requirement around the pump more critical for reliable long-duration continuous operation in warm laboratory environments.
The V-40's two-stage PTFE pump head and direct drive system provide stable, consistent vacuum output throughout the continuous operating cycle — preventing the vacuum fluctuations that can disrupt filtration membrane integrity, cause bumping in vacuum distillation setups, and affect product quality in pharmaceutical vacuum drying applications. Stable vacuum operation at the V-40's higher 35 L/min flow rate is the key functional reliability requirement for its primary general laboratory vacuum applications.
The V-40's motor is designed for safe continuous electrical operation at 240W — with motor winding insulation, electrical connections, and thermal management appropriate for sustained duty cycle performance within the specified 5–40°C ambient temperature and ≤80% RH humidity range. The safe electrical design protects against motor winding failure, insulation breakdown, and electrical hazards that can occur in laboratory environments with chemical vapour exposure and humidity cycling during continuous vacuum pump operation.
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