Circulating Water Vacuum Pump for Laboratory and Industrial Use

Product Introduction

Our circulating water vacuum pumps are designed to provide efficient and stable vacuum conditions for a variety of laboratory and industrial applications. Utilizing circulating water as the working fluid, this series of pumps creates a clean, oil-free vacuum environment, replacing traditional oil-sealed vacuum pumps and avoiding related maintenance issues and oil mist pollution. Combining reliability with ease of use, our pumps are the ideal choice for applications such as vacuum filtration, distillation, and evaporation.

Applications

Our circulating water vacuum pumps are widely used in:

• Chemical Laboratories: Vacuum filtration, rotary evaporation, vacuum drying.
• Pharmaceutical Industry: Solvent recovery, vacuum distillation.
• Scientific Research: Various experiments requiring vacuum conditions.
• Environmental Monitoring: Sample preparation requiring a vacuum.
• Educational Institutions: Laboratory demonstrations and student experiments.
• Food Processing: Evaporation, crystallization, filtration, and drying.

Detail & Parts

Our circulating water vacuum pumps are constructed from high-quality components to ensure durability and reliability. Key parts include:

• Pump Body: Typically designed with dual taps that can be used individually or in parallel, equipped with two vacuum gauges. The main unit, depending on the model, uses a stainless steel or anti-corrosion core, offering features like corrosion resistance, no pollution, low noise, and easy mobility.
• Impeller: A critical component mounted eccentrically within the pump body, which drives the working water to form a water ring through rotation.
• Water Tank: Used to store the circulating working water. Some models feature an all-plastic tank, which is resistant to corrosive substances like acids and alkalis.
• Vacuum Gauge: For real-time monitoring of the vacuum level.
• Suction Nozzle: To connect to the equipment requiring vacuum.
• Circulating Water Inlet and Outlet: For connecting to an external cooling water source or providing circulating cooling water for other equipment.

Features

• Multi-purpose Machine: Not only provides vacuum conditions but can also perform external circulation to supply cooling water for a reaction apparatus.
• Water-Saving: The water in the tank can be recycled, making it particularly suitable for laboratories with water shortages or insufficient water pressure.
• High-Quality Materials: The main unit features a stainless steel and anti-corrosion core, ensuring corrosion resistance, no pollution, low noise, and easy movement.
• Multi-User Capability: Some models are equipped with multiple suction heads, allowing several experiments to be conducted simultaneously, saving laboratory space.
• Stable and Reliable Operation: Provides uniform suction, stable and reliable performance, simple operation, and convenient maintenance.

Technical Specifications

Principle

The circulating water vacuum pump is a centrifugal mechanical pump that uses water as its working fluid. Its core principle is as follows:

1. An appropriate amount of water is held within the pump body as the working fluid. When the impeller rotates clockwise, the water is thrown outwards by the impeller.
2. Due to centrifugal force, the water forms a closed water ring of equal thickness that conforms to the shape of the pump cavity.
3. Because the impeller is mounted eccentrically, a crescent-shaped space is formed between the impeller hub and the inner surface of the water ring. This space is divided into several small chambers of varying volumes by the impeller's blades.
4. As the blades rotate from the upper right downwards, the "water piston" is pushed outwards centrifugally, causing the volume of this space to gradually increase, and gas is drawn in from the axial suction port.
5. As the blades rotate from the bottom upwards to the left, the "water piston" moves relatively towards the center of the axis, and the space between two blades gradually decreases. The inhaled gas is then compressed and discharged through the exhaust port.
6. With the continuous rotation of the impeller, each volume chamber changes repeatedly, allowing the suction and exhaust processes to proceed continuously.

Procedure

1. Preparation: Place the vacuum pump on a stable work surface. For initial use, open the top cover of the water tank and fill it with clean, cold water until the water level is near the height of the rear overflow nozzle. It is recommended to change the water at least once a week to maintain water quality.
2. Vacuum Operation: Securely connect the suction hose of the equipment to be evacuated to the pump's suction nozzle. Close the circulating water switch, connect the power supply, and turn on the power switch to begin the vacuum operation. The vacuum level can be observed on the corresponding vacuum gauge.
3. Continuous Long-Term Operation: For extended operation, the water temperature in the tank will rise, affecting the vacuum level. In this case, connect the drain hose to a water tap and use the overflow nozzle as a drain. By properly controlling the tap water flow, you can keep the water temperature in the tank from rising and maintain a stable vacuum.
4. Supplying Circulating Cooling Water: While performing step 3, connect the inlet and outlet water pipes of the device that needs cooling to the circulating water outlet and inlet nozzles on the rear of the pump, respectively. Set the circulating water switch to the ON position to supply circulating cooling water.

Advantages

• Efficiently Handles Moist and Wet Loads: Unlike other vacuum pumps that may require dry or slightly moist conditions, water ring vacuum pumps excel in environments with vapor, condensate, and liquids.
• Low Maintenance Costs: Compared to other types of vacuum pumps, water ring pumps have fewer moving parts and require no internal lubrication, resulting in less wear and tear, thus reducing maintenance needs and costs.
• Eco-Friendly and Safe: By using water as the sealing liquid, there is no issue of oil vapor contamination, making it an environmentally friendly choice.
• Robust and Durable: Water ring vacuum pumps are known for their durability and can withstand harsh conditions, including dusty gases and vapors, ensuring reliability and a long service life.
• Smooth and Quiet Operation: The water ring forms a liquid seal between the rotor and the pump casing, which results in quieter operation, smooth running, and high stability.

Our Commitment to Accuracy and Quality

We are committed to providing circulating water vacuum pumps of the highest quality. Our products undergo rigorous quality control and performance testing before leaving the factory to ensure that every unit meets or exceeds industry standards. We use high-quality, corrosion-resistant materials and precision manufacturing processes to guarantee long-term stable operation and accurate vacuum performance. We pledge to provide our customers with authentic and accurate product specifications and performance data to help you make informed purchasing decisions.

Flexible Partnership & Supply Models

We understand the diverse needs of different customers. Therefore, we offer flexible partnership and supply models. Whether you need a single unit for laboratory research or a bulk purchase for an industrial production line, we can provide a corresponding solution. We support customization services and can adjust product configurations and materials according to your specific application requirements. We partner with multiple logistics providers to ensure products are delivered safely and on time worldwide. We look forward to establishing a long-term partnership with you for mutual growth.

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