How does a diaphragm metering pump work?

Air operated diaphragm metering pumps use compressed air to drive a double diaphragm (two diaphragms) alternatively. A shuttle valve alternates the air flow between the two diaphragms. The flow of the media that is being pumped is adjusted by how much air pressure is supplied to the pump.

How does a hydraulic diaphragm pump work?

The diaphragm has driving hydraulic fluid one side and the liquid to be pumped on the other side. The piston pumps the driving fluid which moves the diaphragm and in turn pumps the liquid on the other side. This arrangement avoids any contact between the pumping element and the liquid pumped.

How do solenoid metering pumps work?

Solenoid metering pump is the use of electromagnetic push rod driven diaphragm in the pump head reciprocating movement, causing the pump head chamber volume and pressure changes. Changes in pressure caused by suction valve and discharge valve opening and closing, to achieve quantitative liquid suction and discharge.

What is fuel metering pump?

A metering pump moves a precise volume of liquid in a specified time period providing an accurate volumetric flow rate. They are typically made to meter at flow rates which are practically constant (when averaged over time) within a wide range of discharge (outlet) pressure.

Where is diaphragm pump used?

The applications of diaphragm pump commonly applicable in many industries. These pumps are used to push liquids like corrosive chemical, volatile solvents, viscous, shear-sensitive foodstuffs, pharma product, sticky fluids, dirty water, smaller solids, creams, abrasive slurry, oils, and gels.

What is the advantage of diaphragm pump?

HANDLES A WIDE VARIETY OF FLUIDS WITH HIGH SOLIDS CONTENT: Handling a wide range of viscosity – both caustic and abrasive, Diaphragm pumps are some of the most versatile pumps in the world. NO close – fitting or rotating parts so liquid with high solid % and/or size of solids can be pumped easily.

What are the characteristics of a diaphragm pump?

Characteristics of Diaphragm Pump

Liquid Flows With Pulsation. Because of its operating principle, liquid flows intermittently due to the alternation of suction and discharge.
Once Liquid Enters the Cylinder by the Working of a Check Valve, It Always Flows Out From the Upper Side.
Sealing of the Check Valve Is Critical.

What is diaphragm dosing pump?

The mechanical diaphragm dosing pumps use a fixed ratio mechanical gearbox which translates the rotation of the motor to the reciprocating action of the piston. By changing the ratio we can increase or decrease the number of strokes per minute that the piston dosing pump makes.

How do I select a metering pump?

With that in mind, a metering pump should be sized so that the maximum expected flow rate is 85% to 90% of the pump’s capacity, which will leave room for additional capacity, if needed. The minimum capacity should never be less than 10% of the pump capacity to maintain accuracy.

What are the diaphragm pumps?

There are three main types of diaphragm pumps: Those in which the pump is sealed with one side in the fluid to be pumped, and the other in air or hydraulic fluid. The diaphragm is flexed, causing the volume of the pump chamber to increase and decrease.