Bench-top Water Aspirator Pump LBWP-T2015

Introduction

Bench-top Water Aspirator Pump features a flow rate of 20 reservoir lid, preventing spillage and enhancing safety. It includes a motor cooling pathway, ensuring thermal stability during prolonged use. Our bench-top water aspirator pump offers corrosion-protected water channels, increasing longevity in solvent-rich environments.

This vacuum pump is designed to meet the rigorous requirements of modern laboratory operations, ensuring high precision, reliability, and ease of use for various experimental applications.

Applications

Bench-top Water Aspirator Pump supports processes like rotary evaporation and vacuum filtration without the need for oil-based pumps. It plays a key role in chemical, pharmaceutical laboratories, biochemistry and environmental analysis. 

Specifications

Flow Rate	20 L / min
Lift	8 m
Pump Body	Stainless steel
Maximum Vacuum	0.098 MPa
Pumping Rate Per Tap	10 L / min
Vacuum Concentration	2
Water Reservoir	15 L
Voltage	220 V
Power	180 W
Dimension	400 mm ×280 mm × 420 mm
Weight	15 kg

Features

Noise‑Reducing Fluid Muffler

Precise Vacuum Control

Vacuum Meter Configuration

Stainless-Steel Pump Body

Anti‑Corrosion Stainless-Steel Water Tank

FAQs

1. How does a bench-top water aspirator pump generate suction using water flow?

bench-top water aspirator pump . harnesses the Venturi effect, in which fast-moving water through a constriction lowers lateral pressure, creating suction at the side arm inlet. It operates on the Bernoulli principle—pressure drops where velocity increases—so connecting tubing to that inlet draws out gas or vapor. This design is simple, requiring no electrical power or moving parts, yet achieves vacuum depths near the vapor pressure of water. It is also highly reliable and resistant to corrosion since the wetted parts don’t mechanically wear in contact with corrosive fluids. The ease of use makes it ideal for routine benchtop filtration and solvent removal. For small reserve labs, its robustness is unmatched compared to mechanical pumps. When fed by sufficient water flow, it provides immediate vacuum for bench operations.

2. How does a bench-top water aspirator pump generate suction using water flow?

bench-top water aspirator pump . harnesses the Venturi effect, in which fast-moving water through a constriction lowers lateral pressure, creating suction at the side arm inlet. It operates on the Bernoulli principle—pressure drops where velocity increases—so connecting tubing to that inlet draws out gas or vapor. This design is simple, requiring no electrical power or moving parts, yet achieves vacuum depths near the vapor pressure of water. It is also highly reliable and resistant to corrosion since the wetted parts don’t mechanically wear in contact with corrosive fluids. The ease of use makes it ideal for routine benchtop filtration and solvent removal. For small reserve labs, its robustness is unmatched compared to mechanical pumps. When fed by sufficient water flow, it provides immediate vacuum for bench operations.

3. What vacuum depth can bench top water aspirators realistically achieve, and what limits them?

The ultimate vacuum of a water aspirator is fundamentally capped by the vapor pressure of the working fluid—for pure water at room temperature this is about 32?mbar. Actual performance may be shallower with tap water because impurities or temperature variations raise vapor pressure. If your supply pressure drops or the water temperature rises, suction strength declines—lead¬ing to variable vacuum. The pressure also degrades when users share the same water line during heavy demand. This variability is why read-outs vary between 10–30?Torr, depending on flow, delivery pressure, and ambient conditions. When deeper vacuums are needed, mechanical pumps (e.g. diaphragm, scroll or rotary vane) are preferred

4. What materials and coatings improve chemical compatibility and longevity in benchtop aspirators ?

bench-top water aspirator pump advanced units are built from -coated gargles and fluorine-rubber/ hoses to resist acid, solvent and alkali corrosion. Common entry level aspirators use brass or polypropylene, which quickly degrade with organic or inorganic reagents. Stainless steel wetted surfaces resist oxidation and mechanical wear, making them better for long-term use or solubilized acid filtration. spray coatings reduce fouling and support aggressive procedures. Units with replaceable ejector nozzles or armored heads are easiest to service. These material upgrades also minimize contamination risk when aspirating volatile solvents, which can otherwise carry into taps or wastewater.

5. How is back suction and overflow protection managed to avoid sample contamination or flooding?

bench-top water aspirator pump include a check valve or reflux block on the vacuum port to prevent water backflow in case the vacuum line is broken or pressure spikes. Many recirculating designs feature overflow drains with float sensors or alarms to shut off water supply if the reservoir fills. Hose barbs often have built in check valves to stop aspirated laboratory liquids from entering the water tank. Documentation from prudent practices guidelines also recommends vented pressure-relief devices on the water supply to prevent splashing or sudden overflow into sinks. Together, these safeguards avoid sample contamination, glassware flooding, and sink blockages—common risks in water jet systems.