Vacuubrand ME 4 NT Diaphragm Vacuum Pump

Vacuubrand ME 4 NT Diaphragm Vacuum Pump

The Vacuubrand ME 4 NT is a twin-head diaphragm vacuum pump engineered for dry, continuous, and contamination-free evacuation of non-aggressive gases and vapors. Built on VACUUBRAND’s New Technology (NT) architecture, the pump couples optimized kinematics with planar PTFE/elastomer composite diaphragms to deliver a peak displacement capacity of 4.0 m³/h (2.4–2.6 cfm) and an ultimate vacuum of 70 mbar (52 Torr).

The ME 4 NT operates completely oil-free, preventing hydrocarbon back-streaming into analytical circuits or filtration matrices. Its symmetrical dual-head displacement mechanism minimizes dynamic mechanical imbalance, keeping acoustic emissions at 45 dBA under nominal operational load. The housing, crank mechanism, and gas-path components are tailored to handle vacuum filtration, liquid aspiration, solid-phase extraction (SPE), and inert gas evacuation across testing facilities, offshore laboratory units, and industrial pilot plants.

Technical Details

Compatibility

• Filtration Assemblies: Direct fit for Millipore, Sartorius, and Whatman 47 mm / 90 mm glass/stainless vacuum filter funnels and multi-port filtration manifolds.
• Vacuum Regulators & Controllers: Direct mechanical integration with Vacuubrand Manual Vacuum Regulator Valve with analog gauge (MPN: 20696840) and electronic VACUU·SELECT controllers.
• Tubing Interfaces: Factory-equipped for 8 mm (5/16″) and 10 mm (3/8″) ID thick-walled vacuum tubing (reinforced PVC, silicone, or Viton). Inlet/outlet ports can be unthreaded to expose female G 1/4″ threads for swagelok or push-in pneumatic adapters.
• System Skid Upgrades: Compatible drop-in base for mobile diagnostic carts, sampling skids, and laboratory automation units.

Frequently Asked Questions

What is the difference between Vacuubrand ME 4 NT and ME 4C NT?

The ME 4 NT is a standard laboratory pump equipped with aluminum heads and standard elastomer diaphragms/valves designed for non-aggressive, neutral gases and clean filtration applications. The ME 4C NT is the dedicated chemistry version featuring complete fluoropolymer (PTFE/ETFE/FFKM) wetted paths, making it chemically resistant to concentrated acid vapors, halogenated hydrocarbons, and organic solvents.

Can the ME 4 NT run continuously under full vacuum?

Yes. The ME 4 NT is engineered for 100% continuous duty (S1 rating) across its entire pressure profile, from atmospheric pressure down to its ultimate vacuum limit of 70 mbar. The motor and bearing assembly maintain low operating temperatures even when dead-heading for extended periods.

What maintenance is required on this pump?

The pump is oil-free and does not require fluid monitoring, oil changes, or internal lubrication. Routine maintenance is limited to periodic inspection of the diaphragms and valves, typically every 10,000 to 15,000 operating hours. A complete overhaul is executed using the standard Vacuubrand Service Kit (MPN 20696860) without dismantling the central crank drive.

Can I connect this pump directly to 1/4″ NPT fittings?

The inlet and discharge ports feature female G 1/4″ BSP parallel threads fitted with removable stepped hose barbs (DN 8–10 mm). To integrate into 1/4″ NPT piping or compression tube fittings, use a standard G 1/4″ male (BSPP) to 1/4″ NPT female adapter with an appropriate bonded seal or copper crush washer.

How do I control or throttle the vacuum level?

Vacuum can be regulated mechanically using a fine-metering needle valve or the Vacuubrand manual vacuum regulator (MPN: 20696840) with an analog dial gauge. For automated lab processes, the unit can be connected to an inline solenoid valve controlled via an electronic controller such as the VACUU·SELECT.