Do dosing devices with metering pumps still need a check valve?

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

Of course, the main thing is to install a check valve to prevent backflow.

Overview of phosphate dosing devices.

The phosphate dosing device is a complete set of equipment that integrates dosing, stirring, liquid conveying and automatic control, which has strong adaptability and a wide range of applications. It is mainly used in raw water of power plants, boiler feed water, oilfield surface gathering and transportation dehydration treatment systems, petrochemical and other dosing systems and wastewater treatment systems. The types of additives include coagulants, phosphates, ammonia, lime water, water quality stabilizers (corrosion inhibitors), scale inhibitors, liquid insecticides, etc.

Phosphate dosing device.

The working structure principle of the phosphate dosing device.

The dosing device is mainly composed of a solution tank, a stirring box (with a stirrer), a metering pump, a liquid level gauge, an electric control cabinet, a pipeline, a valve, a safety valve, a check valve, a pressure gauge, a filter, a base, an escalator, etc. (it can be configured according to the actual requirements of users). The dosing device is prepared in the stirring box according to the required concentration of the agent, and is evenly stirred by the stirrer and then put into the solution box, and the prepared solution is transported to the dosing point or the designated system with a metering pump (dosing pump). The complete set of dosing device has the characteristics of compact structure, safety and simplicity, and easy operation and use.

The device can also be designed and configured with necessary components according to the requirements of different process flows of users, so as to achieve suitable functions (such as automatic remote control), economy and practicality.

Precautions for the selection of phosphate dosing device.

1. When the user selects the dosing device, first determine the selection specifications (including metering pump parameters, mixing box volume, solution tank volume and site conditions) according to the amount of solution required by the system, and then determine the dosing method according to the dosing situation and the dosing situation (generally using the method of "one opening and one backup").

2. Select the material (stainless steel, carbon steel, non-metallic material) of each part of the dosing device and the type of metering pump (diaphragm pump, piston pump) or provide our company with the parameters (name, concentration, temperature, density, viscosity, corrosivity, etc.) of the dosing device

3. Other special requirements for dosing devices.

Classification of phosphate dosing device structure.

Dosing devices include: feed water ammonia device, hydrazine device, furnace water plus phosphate device, condensate ammonia device, etc.

The composition of the dosing device includes: solution tank, liquid level gauge, metering box, agitator, dosing metering pump, safety valve, pressure gauge, control cabinet, valve and pipeline centralized arrangement, and the material of each component is mainly divided into stainless steel and carbon steel lining.

1.This principle is blunt. For example, the metering pump first beats the liquid into a large vat, which is noisy, but the liquid flows out of the drum again and evenly. As for the damper, it's just that the bucket is shrunk. rj%]l p

2.The damper is air-type, diaphragm-type, and airbag type.

p/h?The 7c air type is just an ordinary empty shell. There is a pressure gauge on the top and an interface on the bottom.

When it was first installed, because the air inside was atmospheric, the liquid needed to compress the gas to play a role, but the effect was not good, and after a long time, it was filled with liquid. @pqi*qwf7m

Diaphragm type, upper and lower 2 cavities. The shape is fastened together like two bowls, and a diaphragm is fixed in the middle. The pressure gauge is connected to the upper cavity, and the pressure gauge is observed.

The upper chamber is flushed with gas, so that the diaphragm is PTFE composite rubber. The diaphragm is soft and fills the entire upper and lower cavities as soon as it is inflated. As soon as the liquid enters the damper, it is affected by the cushioning effect, and the effect is good.

The airbag type is generally cylindrical and has a balloon-like skin inside. After inflation, it is covered with cavities, and the pressure gauge is the same as that of a diaphragm. The liquid to be measured has a large contact area with the air bag, and the heavy effect is the best.

f {x-dc 3, install. } The installation of the damper is to be installed in the pipeline perpendicular to the outlet of the metering pump.

Upstairs is more than half right.

A flow meter is a measuring instrument used to determine the value of a flow rate, including gases and liquids.

And metering pumps. Also known as a quantitative pump or proportional pump, it is a special positive displacement pump that can meet the needs of the process, the flow rate can be adjusted, and it is used to transport liquids (especially corrosive liquids), and cannot be used as a measuring instrument.

Metering pumps. It is a pump with a metering function, a device with dual functions of measurement and power transmission, and a flowmeter is just a measuring device. When conveying materials with a normal pump (without metering function), the flow rate should be measured with a flow meter.

How to choose the design pump of the dust dosing device? You can ask the relevant departments for consultation, how to choose?

Miss, if you want to meter the pump, you should find a technician to mediate, or find a technician.

How to choose the metering pump of the dosing device? You're going to have to look at the top 10 brands online.

How to select the metering pump of the dosing device, and what knowledge points need to be learned?

The first thing to consider is the parameters of the metering pump of the dosing device, that is, the flow rate and pressure, and the specific values will be given when designing each working condition, and the properties of the specific medium (including corrosiveness, temperature, viscosity and other conditions) will be given

1. In the case of small flow and low pressure, you can choose electromagnetic diaphragm metering pump, which is easy to install and simple to use.

2. In the case of medium flow and low pressure, you can choose a mechanical diaphragm metering pump, which is often used in water treatment and other working conditions, and can be used as a PAM dosing pump and PAC dosing pump.

3. In the case of high pressure, if the medium is not corrosive, the plunger metering pump can be selected according to the flow parameters, and if the medium is special, the hydraulic diaphragm metering pump can be selected, which has good sealing and corrosion resistance.

The second thing to consider is the requirements of the working environment, such as whether it needs to be explosion-proof and waterproof, indoor or outdoor use, these conditions are related to the selection of the motor.

It is also necessary to consider the control of the metering pump of the dosing device, there is manual adjustment, there is the need for frequency conversion adjustment, there is the need for signal control, and the appropriate way is selected according to the requirements of the working conditions.

How to choose a metering pump for dosing devices, then choose a usable one, or find a professional person.

It is said that the dosing device facility cannot be selected, you have to see whether its range is enough to be subject to the accuracy of measurement.

How to choose this home decoration metering pump, what time do you think is the right choice?

Sinking dosing device tired can be selected.

Hydrochloric acid, nitric acid, liquid alkali, polyacrylamide, polyaluminum chloride, fungicides, antiscalants, all need to be used.

The main contents of raw water pretreatment are: coagulant dosing, coagulant dosing, sometimes disinfection can also be dosed with metering pumps, sludge treatment dosing, etc.

The circulating cooling water will have the addition of antiscalants.

Your range is also too large, sewage, recycled water, pure water, be specific.

Device Name Combination Type Dissolving Tank.

Volume m3 metering pump.

Type Metering pumps.

Flow rate (l h) Metering pumps.

Pressure (MPa) Dosing.

Method: hydrazine deoxygenation dosing device, two tanks and two pumps.

Two tanks and three pumps. Plunger type mechanical diaphragm type.

Hydraulic diaphragm 30-200 manual.

Automatic adjustment of pH value ammonia addition device two tanks and two pumps.

Two tanks and three pumps. Plunger type mechanical diaphragm type.

Hydraulic diaphragm 30-200 manual.

Automatic phosphate dosing device with two tanks and two pumps.

Two tanks and three pumps. Plunger type mechanical diaphragm type.

Hydraulic diaphragm 30-200 manual.

Automatic coagulant (coagulant) dosing device: two tanks, two pumps, two tanks, three pumps, plunger type.

Mechanical diaphragm type.

Hydraulic diaphragm 40-330 manual.

Automatic corrosion inhibitor (scale inhibitor) dosing device: two tanks, two pumps, two tanks, three pumps, plunger type.

Mechanical diaphragm type.

Hydraulic diaphragm 40-330 manual.

Automatic pH adjustment and acid (alkali) device, two tanks, two pumps, two tanks, three pumps, plunger type.

Mechanical diaphragm type.

Hydraulic diaphragm 40-330 manual.

Automatic ferrous sulfate coating dosing device one tank and one pump.

Two tanks and two pumps, centrifugal type.

The rotary lobe pump m3 h is about automatic.

Our metering pump dosing device is very satisfactory, and the one we bought last time has many sets of different types of dosing devices, which should have what you need.

First of all, it is necessary to confirm the concentration of the agent, and then neutralize the pH value of the sewage according to the concentration, the general range is 6-8PH value, mainly to pay attention to the daily treatment capacity, a lot of sewage pH value is changing, to fully consider the choice of a larger metering pump. As long as the pressure is large, the distance between the output pipeline and the dosing point is 10m, and the pressure of the line itself can be increased by one bar+ pipeline.