Components of a Dosing Pump

A dosing pump is used to deliver chemical or other substances into a stream or flow. This can be for manufacturing applications like getting a regular consistency for glue or additive in fibreboard making or ensuring a brine for meat manufacture is a consistant quality.

Dosing pumps come in a range of sizes and flow rates. It is important to find the right one for your application and be sure that it will fit where you need to place it.

Dosing Rate

Dosing pumps are a type of positive displacement pump that is designed to inject a precise amount of chemical or other product into water, gas or steam. This process is used in a number of different applications and industries.

The dosing rate of a dosing pump can be controlled by a variety of different methods. One of the most common is through the use of a pulsed signal from a pH probe or other device. This allows the pump to adjust its stroke length and speed depending on the current pH or flow of the liquid.

Another method is to control the pump’s motor speed by sending a 4-20 mA signal from a controller. This gives the pump a two-variable control of its stroke frequency and allows it to be able to respond accurately to changing load conditions.

A third method of controlling a dosing pump is through the use of a digital control board that has integrated speed and stroke length controls. This is often a more complex method of controlling a dosing pump than using a simple solenoid, but it can be an effective way to control the flow of fluid in a dosing system.

There are several types of dosing pumps available, with the most common being piston diaphragm and peristaltic. Both types of pumps are able to adjust their stroke length and speed to suit the current pH or flow of the media they are handling.

Pneumatic dosing pumps can also be used for this purpose, although they are generally much less accurate than hydraulic diaphragm or peristaltic pumps. These pumps can be operated manually or electronically and are able to handle many different types of fluids, including abrasive, acidic, caustic, hot, or hazardous chemicals.

Diaphragm pumps are an efficient and reliable type of dosing pump, allowing for smooth, continuous dosing at a consistent rate. They are typically made from plastics, which allow them to be relatively inexpensive while still providing excellent corrosion resistance and protection against a wide range of chemicals.

Finally, gear pumps are an efficient and cost-effective type of dosing pump that is ideal for conveying a wide range of fluids, including abrasive, caustic, acidic, or toxic liquids. These pumps are able to operate at high pressures and work with viscous, thick liquids.

Inlet & Outlet Tubing

The inlet and outlet tubing of a dosing pump are critical components for proper functioning. These pipes must be able to handle the chemical being pumped, as well as resist corrosion and other environmental conditions that could degrade or deteriorate them.

They also need to be able to withstand temperature changes, as the liquids being pumped may be hazardous or highly corrosive. This means that the inlet and outlet tubing of a pump should be made of high-quality materials.

Some of the best materials for metering Dosing Pump pumps include nitrile (NBR), Hypalon, Viton, silicone, PVC and EPDM. Some of these elastomeric polymers also have wide compatibility with chemicals, making them good choices for many applications.

A pump’s inlet and outlet tubes are designed to prevent backflow and siphoning. They must be flexible and able to bend and rotate easily without kinking or becoming too stiff. They need to be elastomeric so that they can maintain the shape of the hose for millions of cycles.

If the tube is not flexible enough to rotate freely, it will wear down faster. This reduces the life of the hose. It is recommended that the inlet and outlet hoses of a dosing pump be replaced every 600 hours or 50,000 dosing times, depending on the application.

This will help ensure that your dosing pump works effectively and efficiently. It will also minimise downtime and reduce maintenance costs.

The inlet and outlet hoses of metering pumps should be placed as close as possible to the product being pumped. This will minimize the chance of the fluid being contaminated.

For example, the dosing pump should be placed next to or below the chemical container or tank that it is designed to be used with. This will avoid the risk of contaminating the container or pump with sludge, dirt or other waste that could clog it or damage the pump.

Another consideration is that the inlet and outlet hoses should be located at the same height as the pump head. This will reduce the amount of squeezing applied to the hose.

Injector & Foot Valve

The injector & foot valve are important components of a dosing pump that help ensure the system is working correctly and the fluid will be injected at the desired rate. This helps keep the chemical from being diluted and helps ensure the product is delivered in the middle of the flow to avoid wastage of the product or damage to walls of the tank.

The pump itself can be made from a variety of chemical resistant plastics (PVC, PE or similar), rubbers or stainless steel. It can be made to withstand a wide range of pressures and temperatures, has a suction line attached to it, a dosing line connected to the suction and a control system that turns the pump on and off at specific times.

Typically these pumps are used in water, steam and gas applications to inject chemicals. They can be small in size and have a variety of options, including simple on/off controls and full digital or analog controls for more advanced dosing systems.

In most cases the pump will be attached to a drum of the fluid and it will pull the fluid up through the tubing. The pump will then displace that fluid into the desired location with a variety of different tubing sizes available.

Once a certain amount of the product is dispensed, the non-return valve on the bottom of the pump can allow the product to escape back into the drum again. This keeps the pump primed as well and can be fitted with a float switch for checking the product is still present in the drum and alarming when the latter runs out.

Dosing pumps are used for a number of industrial applications, from wastewater treatment to food processing. They can also be used in power plants to inject feed water or condensate.

A dosing pump is a positive displacement type of pump that is designed to inject chemicals into steam, gas or water. They have been around for years and are now an essential part of integrated dosing systems that enable automatic dispensing of chemicals.

Pump Body

The pump body of a dosing pump is the mechanical assembly that contains the pump’s shaft mounted on bearings, the sealing mechanism to prevent uncontrollable leakage, and structural components designed to handle the loads and stresses imposed on the pump during use. It can also be made of varying materials, such as rubbers, plastics or stainless steel.

Typical applications of dosing pumps include filling creme tubes or dosing additives into production batches. Depending on the technology a dosing system may be capable of doseting chemicals into small volumes or large quantities, such as several cubic meters.

There are three basic types of dosing/metering pumps: piston/plunger, diaphragm and pulse injection. Piston/plunger dosing pumps are the most accurate in terms of metering fluid as the volume of the chamber is directly proportional to the fluid being pumped in. The pump is also very reliable because no internal parts rub against each other creating friction and wear.

Diaphragm pumps are also a positive displacement pump that uses a reciprocating diaphragm to move fluid. They are extremely reliable as there is no friction between the internal parts and no oil vapor contamination or leakage can occur during operation.

This type of dosing pump is very easy to operate and maintain. The diaphragm can be accessed easily and worn out parts can be replaced without having to replace the entire pump.

The diaphragm in these types of pumps is sealed to protect against leakage and to keep out harmful chemicals from Dosing Pump entering the system. The diaphragm can be replaced when it becomes worn out as they are easy to disassemble and repair.

In addition to the diaphragm there is an inlet and outlet valve. The inlet valve is used to draw a chemical into the pump and the outlet valve is used to deliver it to a tank or pipe.

Dosing pumps are usually powered by an air actuator or an electric motor. They are controlled by a controller that puts the pump on and off and manages the flow rate.

Dosing pumps are often used for dosing flammable liquids and in refineries, power plants and boiler feed water treatment. In these applications the dosing pump needs to be strong and robust so that it can deliver extreme precision and reliability. This is why the dosing pumps of Grundfos have features such as FlowControl and AutoFlowAdapt to help maintain target flow rates. They are also designed for very high pressure applications and are suitable for dosing corrosive or toxic fluids.