Air Driven Liquid Pressure Pump

Air Driven Liquid Pump

An air-driven liquid pump, also known as an air-operated diaphragm pump (AODD), is a type of pump that uses compressed air as its power source to transfer liquids. It is a versatile and efficient pump commonly used in various industries for applications such as transferring fluids, emptying containers, and dosing liquids.

The working principle of an air-driven liquid pump involves the reciprocating motion of a diaphragm. When compressed air is introduced into one side of the pump, it pushes the diaphragm in one direction, creating a vacuum on the other side. This vacuum causes the liquid to be drawn into the pump through an inlet valve. As the diaphragm moves back in the opposite direction, it compresses the liquid and forces it out through an outlet valve.

One of the advantages of air-driven liquid pumps is their ability to handle a wide range of liquids, including corrosive and abrasive fluids, viscous substances, and liquids with solid particles. They are also capable of dry running without damage, making them suitable for applications where occasional dry operation may occur.

The benefits of using air-driven liquid pumps include:

Versatility: Air-driven liquid pumps can handle various types of liquids, making them suitable for a wide range of industrial applications.

Self-priming: These pumps can self-prime, meaning they can draw liquid from a lower level without the need for external priming.

Ability to handle solids: The diaphragm design of these pumps allows them to handle liquids containing solids or particles without clogging or damage.

Simple operation and maintenance: Air-driven liquid pumps have a relatively simple design, making them easy to operate and maintain. They are often constructed from durable materials, ensuring long-term reliability.

Adjustable flow and pressure: The flow rate and discharge pressure of air-driven liquid pumps can be easily adjusted by regulating the air pressure, allowing for precise control of liquid transfer.

Applications 

● Pressure testing

● Burst(Hydrostatic) testing

● Work holding/power clamping

● Jacking/lifting

● Valve actuator control

● Hydraulic cylinder actuation

● Press safety overload devices

● Roller tensioning

● Metering

● Precision lubrication and spraying

● Liquefied gas transfer

Key features include

● Compressed Air driven - no electricity required (connect to normal air compressor)

● In order to extend the lifetime of the pump, the driving air pressure should not be higher than 8 bar

● No airline lubricator required

● Pressures to 640Mpa (6400 bar)

● Wide range of models with different ratios

● Built-in-cooling on most models

● Easy to install, operate and maintain

● Best price / performance ratio

● No heat, flame or spark risk and explosion proof

● Automatic pressure holding, whatever the cause of the pressure drop, the Suncenter pump will automatically start, keep the loop pressure constant

How it work

An air-driven liquid pump, also known as an air-operated diaphragm pump (AODD), works on a simple and reliable principle. It utilizes compressed air to create alternating pressure differentials that enable the transfer of liquids. Here's a step-by-step breakdown of how an air-driven liquid pump works:

Air Supply: Compressed air is supplied to the pump from an external source, such as an air compressor. The compressed air is directed into the pump's air distribution system.

Air Valve Operation: The air distribution system consists of two air chambers or compartments separated by a flexible diaphragm. Each compartment has an air valve connected to it. The air valves are controlled by the pump's air valve mechanism.

Suction Stroke: When the air valve mechanism directs compressed air to one compartment, it opens the air valve connected to that compartment, while simultaneously closing the air valve connected to the other compartment. The compressed air enters the chamber, pushing the diaphragm away from it. This creates a vacuum effect, causing the liquid to be drawn into the pump through the inlet or suction port. The diaphragm acts as a seal, preventing the liquid from entering the air chamber.

Discharge Stroke: As the diaphragm moves away from the suction side, the air valve mechanism redirects compressed air to the other compartment, reversing the process. The air valve connected to the suction side closes, while the air valve connected to the discharge side opens. The compressed air now enters the discharge side, pushing against the diaphragm. This pressure forces the liquid out of the pump through the outlet or discharge port. Again, the diaphragm acts as a seal to prevent the liquid from entering the air chamber.

Reciprocating Motion: The air-driven liquid pump continues its reciprocating motion, alternately drawing in liquid during the suction stroke and expelling it during the discharge stroke. This cycle repeats as long as the compressed air supply is maintained.

The process of alternating air pressure creates a pumping action, allowing the pump to transfer liquids from one location to another. The design of the pump, including the size and materials of the diaphragm and valves, determines its capacity, flow rate, and the types of liquids it can handle.

DGM Series Liquid Pumps(Single acting, single air drive head)

● They have aluminum bodies, with oxidation treatment and wetted materials of carbon steel or stainless steel, which depending on different service liquid. Material of stainless steel, making them an excellent choice of water application.

● Portable design.

● High quality seals, long service life available

● Easy to install, operate and maintenance.

● Explosion proof and no electrical power required.

DGM series technical specification

The outlet liquid pressure=Driven air pressure*boost ratio

In order to extend the lifetime of the pump, the driving air pressure should not be higher than 8 bar

DGG Series Liquid Pumps(Single acting, single air drive head)

DGG pumps have aluminum bodies and wetted materials of stainless steel or carbon steel, which depends on different service liquid. Materials of stainless steel, make them an excellent choice of water application. High quality seals, long service life available.

DGG series technical specification

The outlet liquid pressure=Driven air pressure*boost ratio

In order to extend the lifetime of the pump, the driving air pressure should not be higher than 8 bar

DGGD Series Liquid Pumps(Double acting, single air drive head)

They are characterized by the same features as the DGG pumps single acting, single air drive head types, but they have less pulsations and deliver approx. 50 % more flow.

DGGD series technical specification

The outlet liquid pressure=Driven air pressure*boost ratio

In order to extend the lifetime of the pump, the driving air pressure should not be higher than 8 bar

2DGGD Series Liquid Pumps(Double acting, Double air drive heads)

They are characterized by the same features as the DGGD pumps double acting, but with two air driven head types, they have less pulsations and deliver approx. 100 % more flow.

2DGGD series technical specification

The outlet liquid pressure=Driven air pressure*boost ratio

In order to extend the lifetime of the pump, the driving air pressure should not be higher than 8 bar

Suncenter DLS Series Pneumatic (Air driven) Liquid Booster System

SUNCENTER- Hydraulic power packs(Liquid pump system) are compact and delicacy solution tailored to customer specific requirements with air driven liquid pumps as well as all accessories to be fitted and installed on the frame or in closed cabinet.

To operate this system, the pressure gauges, valves and pressure regulators have to be fitted on panels. The outlet pressure is easily to be set through a simple air regulator. The pump stops automatically when this end pressure is reached and restarts with a slight drop in the outlet pressure or an increase in the air drive pressure. SUNCENTER Hydraulic power packs are available with wide range of pressure ratios make these series of pumps ideal for powering a variety of oil/hydraulic operations. The maximum operating pressure up to 640 MPa.

As the pressure will be generated by means of a pneumatically operated pump，the electric connection will not be necessary. To operate this system, the air driven liquid pump have to be equipped with the air control unit combined filter and water separator, pressure-regulating valve, pressure control gauge as well as manual relieve valve. In this operation, the pump will be mounted to the stainless steel tank in the closed cabinet in a compact and space saving manner. Pressure gauges, valves and pressure regulators will be fitted on panel.

The desired operating pressure can be attained by adjusting the driving air pressure. When the driving air pressure and the output pressure reach the balance, the pump stops filling pressure and the output pressure stays at the preset value. This hydraulic unit can be used for all kinds of pressure testing and test tools for research and test institutes or for other functions requiring a determined pressure.

DLS Liquid (hydraulic) booster system = Liquid pump+ following valves, gages, and parts

The standard liquid pump system including following parts:

Air –driven liquid booster pump (DGM/DGG/DGGD Three series for choosing)

Stainless steel (carbon steel) material cabinet (Three models for choosing)

F.R.L combination for driven air (adjusts air pressure, add lubricating oil and water filter)

Driven air switch (Pump starting switch), driven air pressure gauge, water tank

Liquid inlet/outlet switch, high pressure liquid guage, unloading valve, interconnecting pipes etc.

And we could also customize it according to clients’ special requirement.

DLS series Liquid Pressure Booster Pump System-The hottest selling Model C cabinet