Introduction to grounding knowledge of chemical pumps, motors and equipment

When the user uses a chemical pump, during the installation process, the power cord, motor and other equipment are usually grounded. What are the benefits of grounding and what protection does it play? The following introduces the basic concepts of grounding:
1. The basic concept of grounding
Grounding is an electrical safety measure taken in order to enable electrical equipment to work normally and protect personal safety. Generally, grounding is achieved by linking a metal wire with a grounding device.

2. Types of grounding equipment
There are two main types of grounding equipment commonly used for grounding, namely, protective grounding (grounding of household electrical equipment or power supply lines).
1. Lightning protection grounding equipment
Lightning protection grounding equipment is generally used on the top of high-rise buildings, mainly to prevent lightning strikes. Commonly used lightning protection grounding equipment includes lightning rods, lightning belts, lightning nets or lightning arresters. The lightning protection grounding equipment generally consists of a lightning receiving device, a grounding wire and a grounding device. These devices cooperate with each other to introduce lightning current into the ground for protection. The lightning receiving device is located on the top of the lightning protection grounding device and is a component that directly receives lightning strikes. Its function is to use its prominent position higher than the protected object to lead the lightning to itself, and use the ground wire or ground rod to introduce the lightning into the ground.
2. Protect grounding equipment
Protective grounding is a necessary grounding measure in the family. The common grounding equipment in the home is the grounding wire and the grounding rod. The grounding wire is the metal wire, which is mainly used to transmit leakage current and static charge. Ground rods, also known as grounding electrodes or grounding grids, are mainly used to introduce the leakage current, static charge or lightning current sent by the grounding wire into the ground.
When houses and buildings need to be grounded, generally, after connecting the power ground wires in the house together, insert a ground rod with good conductivity into the ground to a certain depth. The depth should be determined according to the amount of current in the house as a whole, and the ground wire and ground rod should be connected together.
Most household appliances that people use daily need to be grounded. In household appliances, if grounding protection is not used, when a part of the insulation is damaged or a phase line touches the metal shell, the metal shell of the household appliance will be charged. If the human body touches the metal shell of the appliance at this time, there will be a risk of electric shock. The field must be grounded, and the electrical outlet must be connected to the ground.
Three, the functional characteristics of grounding equipment
The main function of grounding equipment is to provide grounding protection for power supply lines, electrical equipment, etc. of homes or buildings, which can introduce leakage current, static charge and lightning current generated on electrical equipment into the ground to avoid personal electric shock, fire, explosion and other accidents.
In addition, there is another kind of grounding called protective zero connection, which refers to a protective measure that connects the shell or frame of electrical equipment to the zero line of the directly grounded point. Among them, the directly grounded point is also called the neutral point. Take the protective zero connection of three-phase electricity as an example, connect the metal shell of electrical equipment and the metal frame connected with the shell to the line of the neutral grounded power system to protect personal safety.

Chemical pump manufacturers and suppliers from China

Do chemical pumps need to install check valves? Introduction to the knowledge of check valve installation positions

In chemical production, chemical pumps are used a lot, mainly for the transportation of chemical liquid raw materials and sewage recycling. According to the use requirements and the particularity of the medium, a check valve needs to be installed, so what is the point of the installation position of the check valve? Can the check valve be installed for other working conditions? Check valve, also called check valve, is an automatic valve. It relies on the pressure of the flowing medium in the pipeline to push the valve flap to close and open the valve. When the medium stops flowing, the check valve flap closes, it can be effective Prevent the medium in the pipeline from flowing back, which plays a great role in ensuring the safety of the pipeline. In low-liquid-level conditions, use ordinary centrifugal pumps. The pump itself does not have a liquid storage chamber to avoid the trouble of filling the cavity each time. Then, the simple solution is to install a check valve to keep the pump cavity pipeline liquid back and cause idling, Fever machine etc.

According to the structure of the check valve, it can be divided into three types: lift check valve, swing check valve and butterfly check valve. Lift check valves can be divided into two types: vertical and straight-through. Swing check valves are divided into three types: single valve, double valve and multi valve. Butterfly check valves are divided into butterfly double flaps and butterfly single flaps. The above-mentioned check valves can be divided into four types in connection form: threaded connection, flange connection, welding and wafer connection.
1. Install the check valve first and then the gate valve or butterfly valve
Advantages: It can protect the check valve, especially in parallel pumps. When one pump does not start, its outlet door is closed, and when the other pump starts, the impact force is borne by the gate valve or butterfly valve. After the check valve fails, the inlet and outlet valve isolation system can be closed for repair.
Disadvantages: Who will protect the gate valve or butterfly valve? There was a case where the valve plate of a butterfly valve was broken.
2. Install gate valve or butterfly valve first and then check valve
Advantages: It can protect the butterfly valve or gate valve, and the impact force is borne by the check valve.
Disadvantages: Who will protect the check valve? The check valve is switched on and off by the pressure difference. If the pressure of the main pipe is high, it will be closed, and the pressure of the pump will be opened. If the flow rate used is unstable, the check valve will switch repeatedly. Affect the life of the check valve. Moreover, the check valve is broken, especially the mother control system, which can be repaired after shutting down the system.

3. Generally speaking, due to the frequent opening and closing actions of the check valve, the internal connecting parts and sealing parts are prone to damage. In order to facilitate repairs and prevent the entire system from shutting down due to the failure of the check valve, consider from this perspective, The check valve will be installed before the outlet gate valve or butterfly valve. Do you see basically this?
4. The check valve is installed to ensure the flow direction of the water inside the pump, so as to ensure the normal operation of the pump. Therefore, regarding the installation position of the check valve, whether it is installed before or after the water pump, there are two situations:
One is installed at the end of the vertical suction pipe in front of the pump, also called a bottom valve. The purpose is to fill the pump without pumping water once, because when there is no water in the pump and the suction pipe in front of the pump, the pump can only be idling and cannot pump water, so the pump must be filled with water to pump out water. The installation of this kind of water pump is a method when it is above the liquid level, also called negative pressure method.
The other is installed behind the pump. This installation method is that when the liquid level is higher than the water pump, it is convenient to start and stop the water pump without closing the water pump outlet valve, especially for the main control water pump system to prevent backflow.
The check valve must be installed at the outlet of the pump and before the outlet control valve in order to check the check valve. Generally, the first outlet of the pump is a soft connection (shock absorber), followed by a check valve, and then a block valve (such as butterfly valve, gate valve, stop valve, etc.).

Chemical pumps — PP Vertical chemical pump are Designed for the recycling, treatment, and filtration of corrosive liquids (including those with solids) having the tendency to foul, kept in constant level tanks.

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Chemical pump pipeline valve function, installation and use matters needing attention

In the configuration of chemical pumps, pipelines and valves are commonly used components. In the pipeline system, valves are control elements, just like human hands. Therefore, its importance is self-evident in life or in all walks of life. . What are the functions of the valve? how to install? What should I do if there is a malfunction? What matters should be paid attention to in valve installation?

1. Valve function
1. Cut-off and open medium
The flow channel is a straight-through valve, and its flow resistance is small, and it is usually selected as a valve for shut-off and open medium. The downward closing valve (stop valve, plunger valve) is rarely used because of its tortuous flow path and higher flow resistance than other valves. Where higher flow resistance is allowed, a closed valve can be used.
2. Control flow
Usually choose the valve that is easy to adjust the flow as the control flow. Downward closing valves (such as globe valves) are suitable for this purpose because the size of its seat is proportional to the stroke of the closing member. Rotary valves (plug valves, butterfly valves, ball valves) and flex-body valves (pinch valves, diaphragm valves) can also be used for throttling control, but they are usually only applicable within a limited range of valve diameters.
The gate valve uses a disc-shaped gate to cross-cut the circular valve seat opening. It can only control the flow better when it is close to the closed position, so it is usually not used for flow control.
3. Reversing shunt
According to the needs of reversing and shunting, this valve can have three or more channels. Plug valves and ball valves are more suitable for this purpose. Therefore, most of the valves used for reversing and dividing flow select one of these valves. But in some cases, other types of valves can also be used for reversing and shunting as long as two or more valves are properly connected to each other.
4. Medium with suspended particles
When there are suspended particles in the medium, it is suitable to use a valve with a wiping effect on the sliding of the closing part along the sealing surface. If the back and forth movement of the closing member to the valve seat is vertical, it may hold particles. Therefore, unless the sealing surface material allows particles to be embedded, this valve is only suitable for basic clean media. Ball valves and plug valves have a wiping effect on the sealing surface during the opening and closing process, so they are suitable for use in media with suspended particles.

2. Valve installation problems
A. Check before installation
1. Carefully check whether the valve model and specifications meet the requirements of the drawings.
2. Check whether the valve stem and valve clapper open flexibly, whether there is jamming or skewing.
3. Check whether the valve is damaged, and whether the thread of the threaded valve is correct and intact.
4. Check whether the combination of valve seat and valve body is firm, the connection of valve disc and valve seat, valve cover and valve body, valve stem and valve disc.
5. Check whether the valve gasket, packing and fasteners (bolts) are suitable for the requirements of the nature of the working medium.
6. The pressure reducing valve that is outdated or left for a long time should be disassembled, and dust, sand and other debris should be cleaned with water.
7. Remove the port seal and check the degree of sealing. The valve disc must be closed tightly.
B. General regulations for installation
1. The installation position of the valve should not hinder the operation, disassembly and overhaul of the equipment, pipeline and valve body itself, and the aesthetic appearance of the assembly should be considered.
2. For valves on horizontal pipelines, the valve stem should be installed upwards, or installed at a certain angle, and the handwheel should not be installed downwards. The valve, valve stem and hand wheel on the high-altitude pipeline can be installed horizontally, and the opening and closing of the valve can be remotely controlled by a vertical low chain.
3. The arrangement is symmetrical, neat and beautiful; the valve on the standpipe, if the process permits, the valve handwheel is suitable for operation with chest height, generally 1.0-1.2m from the ground, and the valve stem must follow the direction of the operator installation.
4. Valves on side-by-side vertical pipes should have the same centerline elevation, and the clear distance between handwheels should not be less than 100mm; valves on side-by-side horizontal pipes should be installed staggered to reduce the pipe spacing.
5. When installing heavier valves on water pumps, heat exchangers and other equipment, a valve bracket should be installed; when the valve is frequently operated and installed at a distance of more than 1.8m from the operating surface, a fixed operating platform should be installed.
6. If there is an arrow mark on the valve body, the direction of the arrow is the flow direction of the medium. When installing the valve, make sure that the arrow points in the same direction as the medium flow in the pipeline.
7. When installing flanged valves, ensure that the end faces of the two flanges are parallel and concentric with each other, and do not use double gaskets.
8. When installing a threaded valve, in order to facilitate disassembly, a threaded valve should be equipped with a union. The setting of the union should consider the convenience of maintenance, usually the water flows through the valve first and then the union.
Three, installation considerations
1. The valve body material is mostly made of cast iron, which is brittle, so it must not be hit by heavy objects.
2. When handling the valve, throwing is not allowed; when lifting or hoisting the valve, the rope should be tied to the valve body, and it is strictly forbidden to tie it to the handwheel, valve stem and flange bolt holes.
3. The valve should be installed in the most convenient place for operation, maintenance and repair, and it is strictly prohibited to be buried in the ground. The valves on the pipelines directly buried and in the trenches shall be equipped with inspection wells to facilitate the opening and closing and adjustment of the valves.
4. Ensure that the threads are intact and undamaged, and wrap the threads with hemp, lead oil or PTFE tape. When screwing, use a wrench to clamp the hexagonal valve body screwed into one end of the pipe.
5. When installing the flange valve, pay attention to tighten the connecting bolts diagonally, and use even force when screwing, to prevent the gasket from running off or causing deformation and damage to the valve body.
6. The valve should be kept closed during installation. For threaded valves close to the wall, it is often necessary to remove the valve stem, disc and handwheel during installation before they can be turned. When disassembling, you should turn the handwheel to keep the valve open before disassembling.

Chemical pump manufacturers and suppliers from China

Material selection of chemical solution chemical pumps for hydrofluoric acid, alkali, hydrochloric acid, sulfuric acid, etc.

The pump is a common mechanical equipment for the transportation of chemical materials and the pressurization of strong corrosive liquids. Chemical solutions such as sulfuric acid, hydrochloric acid, and hydrofluoric acid have strong corrosive properties. When choosing a chemical pump, the corrosion-resistant fluoroplastic chemical pump is a very suitable corrosion-resistant pump. , Fluoroplastics and fluoroplastics manufactured by Seiken Pumps are very suitable. The impeller and pump cover in the fluoroplastic pump are made of metal material inserts and outsourcing fluoroplastics. The main part of the pump casing is made of HT200 lining. F46 is manufactured. Hydrofluoric acid is a solution of hydrogen fluoride vapor. It is a clear, corrosive liquid with no color or smoke. It has a strong irritating taste and is very easy to volatilize. It will become white smoke after contact with air. Although it is non-flammable, it can react with most metal materials to transform into hydrogen and easily cause an explosion. In addition, hydrofluoric acid is a highly harmful substance, which can cause ulcers when it touches the skin. If the gas is inhaled, it can be fatal.

Therefore, what special requirements should we pay attention to when using a suitable hydrofluoric acid chemical pump? The fusion of hydrogen atoms and fluorine atoms has a relatively strong working ability, which makes hydrofluoric acid unable to be completely electrolyzed in water and has strong corrosion. It can attack metal materials, glass and silicon-containing blocks. Therefore, ordinary Sic silicon carbide contains free silicon and silicon dioxide and other impurities. This kind of impurities is very easy to be etched by hydrofluoric acid. The smoothness of the ground surface will endanger the life of the pump. For chemical aqueous solutions such as hydrofluoric acid, alkali, hydrochloric acid, and sulfuric acid with corrosive media, when selecting fluorine-lined centrifugal pumps and fluorine-lined magnetic pumps, the dynamic and static rings of the centrifugal pump and the main shaft, bushing, moving and static The ring must be made of pressureless sintered silicon carbide material. Seken pump accessories can be adjusted according to the different flow, head and concentration of the medium used by customers, and manufacture high-strength corrosion-resistant, high-temperature, explosion-proof DC variable frequency fluoroplastic chemical pumps that can be used in suitable on-site working conditions.

Chemical centrifugal pump emergency stop steps

Chemical centrifugal pump emergency stop steps

Centrifugation is actually a manifestation of the inertia of an object. For example, when the umbrella rotates slowly, the water droplets will follow the umbrella. This is because the friction between the umbrella and the water droplet acts as the centripetal force of the water droplet. However, if the umbrella spins faster and the friction is not enough to make the droplets spin in a circle, the raindrops will move from the umbrella to the outer edge. It’s like pulling a rock with a rope. If it runs too fast, the rope will break and the rocks will fly out. This is called centrifugation.

The chemical centrifugal pump is designed according to this principle. The high-speed rotating impeller blades drive the water to rotate and throw the water to achieve the purpose of transportation.

Chemical emergency shutdown steps:
1. Quickly press the stop button to stop the pump.
2. Close the outlet valve and wait for the pump to stop for 2 to 3 turns.
3. Control the liquid level of the storage tank and close the inlet, cooling water, lubricating oil and other valves.
4. If it is a heat-conducting oil pump, pay attention to temperature safety.

Chemical pump manufacturers and suppliers from China

What should I pay attention to when repairing chemical pumps?

The maintenance requirements for chemical pumps are as follows

1. Clear and adjust the large gap caused by internal damage and erosion of the pump.

2. Remove dirt, dirt and rust from the pump.

3. Repair or replace the non-compliant or defective parts in time.

4. The rotor balance test is qualified.

5. Validate the coaxiality of the pump and the driver and meet the standards.

6. The test run is qualified and the data is complete. Before the process production needs to be overhauled, we must pay attention to these points. First, the pump should be cut off from the power supply, stopped to cool down, and then the pipeline is depressurized.

When the chemical pump inspection is over and the assembly is to be carried out, pay attention to the following:
1. Whether the pump shaft is bent or deformed.
2. Whether the balance of the rotor meets the standard.
3. The gap between the impeller and the pump casing.
4. Is the shrinkage of the mechanically sealed cache compensation organization regulated?
5. Concentricity of pump rotor and volute.
6. Whether the center line of the volute flow channel and the center line of the pump impeller flow channel are aligned.
7. Adjust the gap between the bearing and the end cover.
8. Adjust the gap of the sealing part.
9. Does the assembly of the transmission motor and the variable (increasing or subtracting) remonstrator meet the requirements?
10. Coaxiality alignment of the coupling.
11. Whether the gap of the mouth ring meets the standard.
12. Whether the tightness of each part connection is appropriate.

PP chemical pump — PP Vertical chemical pump are Designed for the recycling, treatment, and filtration of corrosive liquids (including those with solids) having the tendency to foul, kept in constant level tanks.
The Polypropylene Submersible Chemical & Acid Pump Vertical series are constructed at standard lengths, without intermediate bearings, without guide bushings or mechanical seals to eliminate any sliding parts. This mechanically and hydraulically advanced construction allows for the use of the PP vertical pumps where wear from abrasion (due to crystallization or calcareous deposits) combined to the chemical aggression of the liquid itself requires a more incisive solution than normal vertical pumps.

Chemical pump coating can be used to prevent corrosion

Chemical pump coating can be used to prevent corrosion:
Pump corrosion is a headache problem in industrial production. Generally speaking, corrosion is equipment oxidation caused by environmental media. Corrosion not only causes economic losses to enterprises, but also harms safety and the environment, and increases the loss of natural resources.

Metal corrosion can be divided into two categories: general (uniform) corrosion and localized corrosion. The former occurs more uniformly on all surfaces of the device, while the latter only occurs locally. Such as pitting corrosion, intergranular corrosion, crevice corrosion, hydrogen corrosion, stress corrosion cracking, wear corrosion, delamination corrosion, etc. Especially in the petroleum, chemical industry and marine atmospheric environment.

Chemical pumps are used in these industries, and the anti-corrosion requirements for chemical pumps are getting higher and higher. Once there is a problem in the anti-corrosion work, it will damage the mechanical equipment in the slightest, and may cause a major chemical accident.

For the corrosion problem of chemical pumps, frequent maintenance and replacement of equipment components are the methods commonly used by enterprises at present. The equipment is affected by the material and processing technology, and has high general value.

Polymer composite materials can be used for surface organic coating repair, which is one of the effective anti-corrosion measures for chemical pumps. The surface adhesion coating maintenance method of chemical pumps can be widely used in the repair and pre-protective coating of cavitation, abrasion and corrosion parts. It has excellent chemical resistance and excellent mechanical and adhesive properties. Compared with the traditional welding repair of the pressure device, this method has the advantages of low cost, simple structure, safety performance, and good repair effect.

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Main points of plastic vertical pump installation

When installing a plastic vertical pump, choose a firm horizontal surface, keep the body vertical and fix it.
Try to avoid installing the machine outdoors. If it is installed outdoors, it should be covered with a protective cover. If the pump is equipped with an electronic controller, it must be protected.
Before piping, you should consider the chemistry, temperature conditions and conveying head, and choose different pipe materials to meet actual requirements. For example, if the temperature is above 60℃, PVDF pipe fittings should be installed.
When piping, be careful not to leave any impurities or debris in the pipe, and clean the pipe with clean water if necessary.
The flange joints should be lined with gaskets, and they should be tightened to prevent air from being sucked into the pump.
When piping, pay attention to that the pipeline cannot be twisted by force. After installation, check whether the pump is twisted or deformed due to excessive force during installation or incorrect installation action.
After the pump is installed, make sure that the pipeline is firm to avoid damage to the pipeline caused by vibration.
Before connecting the power cord, make sure that the power used is consistent with the motor type, and connect the overcurrent protection switch.
If the height of the outlet piping is higher than the motor or there is a back pressure situation, please install a check valve at the pump outlet, and the position of the device should not exceed the height of the liquid level too much.
For the sake of stability, install the inlet filter to avoid sucking in debris and damaging the pump
The inlet connecting flange must have the same diameter as the inlet flange, and the outlet connecting flange must have the same diameter as the outlet flange. Warning: Too tight or too loose will affect flow performance and even performance. Please make sure that all nuts are locked. Failure to lock will cause liquid to leak out. If the lock is too tight, it will easily fall off and be damaged. Please install it by personnel familiar with the installation method of this machine and equipment.
For the voltage of the pump motor, please refer to the motor nameplate, and the circuit connection diagram can be found on the motor connection box.

Application of PVDF Plastic Vertical Pump in Electroless Nickel Plating Process

Application of PVDF/PP Plastic Vertical Pump in Electroless Nickel Plating Process

Pump application: electroless nickel plating

Conveying medium: chemical nickel

Water pump material: PVDF, plastic, stainless steel 304/316

Pump type: Vertical Chemical Pump, acid and alkali resistant vertical pump, idling vertical pump, vertical centrifugal pump

Processing parameters: power 0.375-15KW, flow rate 1-120m³/H, head 1-30m

The customer’s process this time is mainly for pre-treatment. The pre-treatment includes degreasing and degreasing-washing-pickling-washing-chemical nickel plating-washing-passivation-washing-drying and other processes. The customer’s matching PVDF fluorine Plastic vertical pumps are mainly equipped with stainless steel filters for nickel plating in chemical nickel filters, which filter impurities and particles in the chemical solution, reduce the surface defects of the plated products, and make the surface of the plated products cleaner and brighter .

Media characteristics: The formula of the electroless nickel plating solution is: NiSO4•7H2O: 20g/l, NaH2PO2•H2O: 30g/l, Na3C6H5O7•2H2O: 10g/l, NH4Cl: 30g/l; pH value: 8.5～9.5 (concentrated) Ammonia adjustment).

Process flow: degreasing-activation-empty plating-sanding-removing floating sand-thickening plating-plating surface layer.

The electroless nickel plating solution is divided into two types, acidic and alkaline. The high-phosphorus non-magnetic coating is formed in the acidic plating solution (the temperature of electroless nickel plating under acidic conditions is generally 85～95℃), while in the alkaline plating solution The resulting low-phosphorus magnetic coating is suitable for use as absorbing materials. Alkaline electroless nickel plating solution has very good throwing power and high coating adhesion.

In the process, degreasing is generally electrolytically treated in a solution containing sodium hydroxide, sodium carbonate, and trisodium phosphate; activation is generally performed in hydrochloric acid or sulfuric acid. For stainless steel substrates, pre-plating is also required; empty plating is first plating A layer of primer coating, so that the diamond can better adhere to; sand coating is to make the diamond initially adhere to the surface of the workpiece. The methods include sand spreading, falling sand, and buried sand. The selection is based on the shape of the workpiece, and the current size is based on the sand The size and shape of the workpiece are determined.

Process flow: 1. HH922A degreasing → water washing → HH942 derusting activation → water washing → water washing → hot water preheating → electroless nickel-phosphorus alloy plating → water washing → chemical black nickel plating → water washing → HH118-7 black passivation → water washing → after deal with

HH922A degreasing → water washing → HH942 derusting activation → water washing → water washing → hot water preheating → chemical black nickel plating → water washing → black passivation (HH118-7) → water washing → post-treatment
Description: ①Process 1, suitable for plating parts of steel, copper alloy, aluminum alloy, cast iron and other materials. For example, the plating parts require high surface hardness and the color is gun black.
②Process 2 is suitable for direct plating of black nickel on steel, aluminum alloy, cast iron and copper alloy. It can also be directly plated on stainless steel, electroplated nickel and electroplated chromium.
③When black nickel is directly plated on stainless steel, electroplated nickel, etc., it needs to be activated with concentrated hydrochloric acid or 20 sulfuric acid (30~45℃) before plating, and the time is not less than 10 minutes. When aluminum alloy parts are plated, it should be carried out according to the aluminum alloy process conditions.

In the electroless nickel plating waste liquid, if there is no complexing agent or the amount of complexing agent is small, sodium hydroxide (concentration of 6mol/L) can be directly used to adjust the pH value. We can also add sodium hydroxide Use horizontal magnetic drive pump for dosing process

How to use the Air operated double diaphragm pump correctly

Air operated double diaphragm pump is a positive displacement pump that uses compressed air as the power to change the volume through the reciprocating deformation of the diaphragm. Its working principle is similar to that of a plunger pump. Pay attention to the following points when using AODD PUMP:
1. Ensure that the large particles contained in the fluid do not exceed the pump’s large safety to pass the particle diameter standard.
2. The intake pressure should not exceed the high allowable working pressure of the pump. Compressed air higher than the rated pressure may cause personal injury and property loss and damage the performance of the pump.
3. Ensure that the piping system of the diaphragm pump pressure can withstand the high output pressure reached, and ensure the cleanness and normal working conditions of the driving air system.
4. Electrostatic sparks may cause explosions, resulting in personal injury, accidents, and property losses. Use a wire with a large enough cross-sectional area as needed to properly and reliably ground the ground screw on the pump.
5. Grounding requirements comply with local laws and regulations and some special requirements on site.
6. Fasten the aodd pumps and each connecting pipe joint to prevent electrostatic sparks from being generated by vibration. Use antistatic hose.

7. To periodically check and test the reliability of the grounding system, the grounding resistance is required to be less than 100 ohms.

8. Keep good exhaust and ventilation, away from flammable, explosive and heat sources.
9. The exhaust of the diaphragm pump may contain solids. Do not point the exhaust to the working area or people to avoid personal injury.

10. When the diaphragm fails, the conveyed materials will be ejected from the exhaust muffler.
11. When transporting flammable and toxic fluids, please connect the outlet to a safe place away from the work area.

12. Please use at least 3/8″ inner diameter pipe with smooth inner wall to connect the exhaust port and the muffler.

13. The high pressure of the fluid may cause serious personal injury and property damage. Please do not perform any maintenance work on the diaphragm pump and the material pipe system when the pump is pressurized. If the rotor pump needs to be repaired, first cut off the pump inlet Open the bypass pressure relief mechanism to relieve the pressure of the pipeline system, and slowly loosen the connected pipeline joints.

14. Pumps using aluminum alloy materials for the liquid transportation part, please do not use them to transport liquids containing Fe3+, halogenated hydrocarbons and other halogenated hydrocarbon solvents, which will cause corrosion and cause the pump body to burst.

15. Ensure that all parts contacting the conveying body will not be corroded and damaged by the conveyed fluid.
16. Ensure that all operators are familiar with the operation and use of the pump and master the safety precautions for the use of the pump. If necessary, provide necessary protective equipment.

17. Use the pump correctly and do not allow long-term dry operation.

AODD PUMP — AODD pumps also called air operated diaphragm pumps, are positive displacement pumps driven and powered by compressed air rather than an electric motor.