Tag Archives: vacuum air pump

China High Performance China Micro Vacuum Pump/ Micro Air Pump/Brush DC Diaphragm Pressure Vacuum Pump/Mini Compressor Air Pump Factory pulley drive

Product Description

three Inch Rd80 Diaphragm Pump Chemical Pump Water Pump PP PVDF Plastic Pump  

Manner Max. Suction Carry (dry/soaked,m) Max. Particle Diameter (mm) Suction and Discharge Dimensions (inch/Npt) Air Inlet Dimensions (inch) Max. Movement Charge (L/min) Max. Air Intake (m³/min)
HY-15/twenty four 7.six two.5 one/2 3/4 one/four 57 .672
HY-twenty five 4 eight 4 one one/2 157 1.seven
HY-40 five 8 5 1/2 358 three.five
HY-50 5 8 six 2 one/two 587 4.nine
HY-80 5 8 9.four 3 3/4 1060 nine.one

 

  • Pneumatic diaphragm pump is a new transportation machinery , is currently 1 of the most

revolutionary pump .

  • Employing compressed fuel as a electricity supply for a variety of corrosive liquid , with particles of liquid , large viscosity , unstable, flammable, poisonous liquid can be pumped

optical exhaustion .

  • There are 4 pneumatic diaphragm materials: plastic , aluminum, solid iron ,stainless steel.
  • Pneumatic diaphragm pumps ended up used nitrile rubber,neoprene , Viton , Teflo , depending on the liquid medium , poly ethylene forty-6 .
  • To meet up with the requirements of different users . Put in a assortment of special situations , for pumping

a range of standard pumps can not pump the media , have attained satisfactory outcomes.

  Delivering stall-cost-free, ice-free operation
Explosion-evidence, zero leak, simple operation
Can transmit the adhesive liquid and huge particles
low shearing, Not effortless to wipe out material structure
Range of content, no rotating areas, relevant to different erosive scenarios
By altering the air supply to alter the circulation delivery
By altering the air pressure to alter the pump lift
Modularization of primary valve and air motor. No broken, easy to disassemble and restore.

FAQ

1. Q: Are you a manufacturing unit or buying and selling firm?

  A: We are a factory.  

 
two. Q: What're your payments ? 

   A: T/T,Western Union,L/C and so on.

 3. Q: What about the deal ?

  A: Regular export plywood circumstance or carton.

 
4. Q: How extended is the guarantee ?

  A: In accordance to intercontinental expectations, items in normal procedure is 1 year,apart from quick-wear component.

 
5. Q: The use of products have?

   A: The pump can suck the peanut, pickles, tomato slurry, pink sausage, chocolate, hops and syrup etc.

   The pump can suck the paint, pigment, glue and adhesive etc.

  The pump can suck different glazed slurries of tile, porcelain, brick and chinaware and many others.

  The pump can suck various toxin and flammable or volatility liquid etc.

  The pump can suck various robust acid, alkali and corrosive liquid and so on.

 
6. Q: How merchandise good quality and services?

     A: Our pump have CE certificate, high quality certain, can settle for OEM,  provide different individualized wants.

US $300-8,750
/ Piece
|
1 Piece

(Min. Order)

###

After-sales Service: Oversea Install Service
Warranty: 3
Certification: EMC, ISO9001:2008, ISO9001:2000, RoHS, CE
Rated Current: Air
Voltage: Air
Material: Aluminum Alloy

###

Customization:

###

Mode Max. Suction Lift (dry/wet,m) Max. Particle Diameter (mm) Suction and Discharge Size (inch/Npt) Air Inlet Size (inch) Max. Flow Rate (L/min) Max. Air Consumption (m³/min)
HY-15/20 4 \7.6 2.5 1/2 3/4 1/4 57 0.672
HY-25 4 \8 4 1 1/2 157 1.7
HY-40 5 \8 5 1/2 358 3.5
HY-50 5 \8 6 2 1/2 587 4.9
HY-80 5 \8 9.4 3 3/4 1060 9.1

###

High Performance China Micro Vacuum Pump/ Micro Air Pump/Brush DC Diaphragm Pressure Vacuum Pump/Mini Compressor Air Pump Factory
 
Providing stall-free, ice-free operation
Explosion-proof, zero leak, simple operation
Can transmit the adhesive liquid and large particles
low shearing, Not easy to destroy material structure
Diversity of material, no rotating parts, applicable to various erosive situations
By changing the air supply to adjust the flow delivery
By changing the air pressure to adjust the pump lift
Modularization of main valve and air motor. No broken, easy to disassemble and repair.
US $300-8,750
/ Piece
|
1 Piece

(Min. Order)

###

After-sales Service: Oversea Install Service
Warranty: 3
Certification: EMC, ISO9001:2008, ISO9001:2000, RoHS, CE
Rated Current: Air
Voltage: Air
Material: Aluminum Alloy

###

Customization:

###

Mode Max. Suction Lift (dry/wet,m) Max. Particle Diameter (mm) Suction and Discharge Size (inch/Npt) Air Inlet Size (inch) Max. Flow Rate (L/min) Max. Air Consumption (m³/min)
HY-15/20 4 \7.6 2.5 1/2 3/4 1/4 57 0.672
HY-25 4 \8 4 1 1/2 157 1.7
HY-40 5 \8 5 1/2 358 3.5
HY-50 5 \8 6 2 1/2 587 4.9
HY-80 5 \8 9.4 3 3/4 1060 9.1

###

High Performance China Micro Vacuum Pump/ Micro Air Pump/Brush DC Diaphragm Pressure Vacuum Pump/Mini Compressor Air Pump Factory
 
Providing stall-free, ice-free operation
Explosion-proof, zero leak, simple operation
Can transmit the adhesive liquid and large particles
low shearing, Not easy to destroy material structure
Diversity of material, no rotating parts, applicable to various erosive situations
By changing the air supply to adjust the flow delivery
By changing the air pressure to adjust the pump lift
Modularization of main valve and air motor. No broken, easy to disassemble and repair.

How to Assemble a Pulley System

A pulley is a wheel that rotates on a shaft or shaft to support the movement of a taut cable. Pulleys allow power to be transmitted from the shaft to the cable.
pulley

Simple pulley

The simplest theory of operation of a pulley system assumes that the rope and weight are weightless and that the rope and pulley are not stretched. Since the force on the pulley is the same, the force on the pulley shaft must also be zero. Therefore, the force exerted on the pulley shaft is also distributed evenly between the two wires passing through the pulley. The force distribution is shown in Figure 1.
The use of simple pulleys is as old as history. Before the Industrial Revolution, people relied on muscle strength to carry heavy loads. Pulleys, levers and ramps make this possible. Today, we can see pulleys in a variety of systems, from exercise equipment to garage doors, and even rock climbers use them to help them reach greater heights. As you can see, these simple machines have been around for centuries and are used in everyday life.
Another simple pulley system is the pulley system. In this system, there is a fixed pulley at the top and a movable pulley at the bottom. The two pulleys are connected by a rope. This combination reduces the amount of work required to lift the load. Additionally, the ropes used in this system are usually made of rope and woven through the individual wheels of the pulley drum.
A pulley is an ingenious device that distributes weight evenly and can be used to lift heavy objects. It is easy to build and can be easily modified for a wide range of activities. Even young children can make their own with very few materials. You can also use simple household items such as washing machines, thin textbooks and even chopsticks. It's very useful and can be a great addition to your child's science and engineering activities.
The simplest pulley system is movable. The axis of the movable pulley can move freely in space. The load is attached to one end of the pulley and the other end to the stationary object. By applying force on the other end of the rope, the load is lifted. The force at the other end of the rope is equal to the force at the free end of the pulley.
Another form of pulley is the compound pulley. Compound pulleys use two or more wheels to transmit force. Compound pulleys have two or more wheels and can lift heavier objects. Dim is POLE2.
pulley

tapered pulley

It is important to clean and align the bolt holes before assembling the tapered pulley. The screws should be lubricated and the threads cleaned before installation. To install the pulley, insert it into the shaft keyway. The keyway should be aligned with the shaft hole to prevent foreign matter from entering the pulley. Then, alternately tighten the bolts until the pulley is tightened to the desired torque.
A tapered pulley is a basic structure. The pulley belt is arranged across four steps. Installed between the headstock casting and the main shaft, it is often used in the paper industry. It integrates with printing machinery and supports assembly lines. These pulleys are also available in metric range options, eliminating the need for ke-waying or re-drilling. They are easy to install, and users can even customize them to suit their needs.
CZPT Private Limited is a company that provides unique products for various industries. This large product is used for many different purposes. Also, it is manufactured for industrial use. The company's website provides detailed specifications for the product. If you need a tapered pulley, contact a company in your area today to purchase a quality product!
Tapered pulleys are vital to paper mill machinery. Its special design and construction enable it to transmit power from the engine source to the drive components. The advantages of this pulley include low maintenance costs and high mechanical strength. Cone wheel diameters range from 10 inches to 74 inches. These pulleys are commonly used in paper mills as they offer low maintenance, high mechanical strength and low wear.
A tapered sleeve connects the pulley to the shaft and forms an interference fit connector. The taper sleeve is fixed on the shaft with a key, and the corresponding inner hole is fixed on the shaft with a key. These features transmit torque and force to the pulley through friction. This allows the tapered pulley to move in a circular motion. The torque transfer characteristics of this pulley are most effective in high speed applications.
The sleeve is the most important part when assembling the tapered pulley. There is an 8-degree taper inside the cone, which is closely connected to the inner surface of the pulley. Taper sleeves and pulleys are interchangeable. However, tapered pulleys can be damaged after prolonged use.
pulley

pulley pulley system

A pulley pulley system is a great way to move heavy objects. These systems have been around for centuries, dating back to the ancient Greeks. This simple mechanism enables a person to lift heavy objects. These blocks are usually made of rope, and the number of turns varies for different types of rope. Some blocks have more cords than others, which creates friction and interferes with the easy movement of the lifting system.
When using a pulley pulley, the first thing to decide is which direction to pull. Unfavorable rigging means pulling in the opposite direction. In theory, this method is less efficient, but sometimes requires a certain amount of work space. The benefit is that you will increase the mechanical advantage of the pulley by pulling in the opposite direction. So the interception and tackle system will give you more of a mechanical advantage.
Pulley pulleys are an excellent choice for lifting heavy objects. The system is simple to install and users can easily lift objects without extensive training. Figure 3.40 shows a pulley in action. In this photo, the person on the left is pulling a rope and tying the end of the rope to a weight. When the rope is attached to the load, the rope will be pulled over the pulley and pulley.
The blocks on the blocks are attached to the ends of the rope. This creates unique lifting advantages compared to single-line systems. In Figure 3, the tension of each thread is equal to one-third of the unit weight. When the rope is pulled over the pulley, the force is divided equally between the two wires. The other pulley reverses the direction of the force, but that doesn't add any advantage.
Use pulleys to reduce traction and load. The weight of the load has not changed, but the length of the rope has increased. Using this method, lifting the load by pulling the rope four times reduces the force required to lift one foot. Likewise, if the pulley system had four pulleys instead of three, the length of the rope would be tripled.
The system can transmit loads in any direction. Rope length is determined by multiplying the distance from the fixed block to the load by the mechanical advantage. If the mechanical advantage is 3:1, then passing the rope through the pulley 3 times will produce the required traction distance. Also, the length of the rope will depend on the mechanical advantage, so if the load is three times the length of the rope, it will be more than three times the required length.

China High Performance China Micro Vacuum Pump/ Micro Air Pump/Brush DC Diaphragm Pressure Vacuum Pump/Mini Compressor Air Pump Factory     pulley driveChina High Performance China Micro Vacuum Pump/ Micro Air Pump/Brush DC Diaphragm Pressure Vacuum Pump/Mini Compressor Air Pump Factory     pulley drive
editor by czh 2022-11-28

China Dhb 920c 12D5 12.5kw Dereike Double Stage High Air Flow Side Channel Vacuum Pump for Dust Collection and Material Handing and Pneumatic Conveying double pulley

Item Description

12.5kw CZPT Double Phase Facet Channel Blower DHB 920C 12D5

Specialized parameters Technological parameters DHB 920C 12D5
Maximum airflow mthree/h 1110
Maximum vacuum mbar -300
Maximum pressure mbar 270
Frequency Hz fifty
Voltage V  345-415△600-690Y
Present A 28.0△/sixteen.2Y
Output kW 12.5
Motor revolutions min-one 2800
Weight  approx Kg 187
Sound degree dB (A) 74

The adhering to Pressure-movement performance curve is measured beneath the suction of 15 °C air and exhaust force 1013mbar.
The allowable variation is±10%.When the inlet air and ambient temperature do not exceed twenty five °C,
the pursuing diagram can nonetheless be accomplished.

Q1 How prolonged is the blower existence?
A1 three-5 many years in standard situation.
Q2 How prolonged is the warranty time period for the blower?
A2 18months free of charge warranty interval, and a lifetime routine maintenance.
Q3 Can the blower be customized?
A3 Standard Blowers are standard parts, but the voltage can be personalized. And blower can be particular remedy in accordance to client unique prerequisite. Also the IE2/IE3 standard blower is obtainable.
Q4 How do you manage the product's high quality?
A4 All the merchandise have good quality testing and dynamic harmony before supply by Our specialist QC.
Q5 How long of the loading time?
A5 five-7 days after order confirmed and receiving of deposit.
Q6 What is actually the of the blower utilization applications?
A6 Side channel blowers have been widely utilised in the environmental drinking water remedy. For instance, in the aeration of sewage, ring blowers can offer oxy that the aerobe want in the activated sludge. Also, blowers can provide the circumstances which make the sewage and activated sludge combined sufficiently to dissolve all sorts of organic matters in the h2o. Then, the sewage water can be purified. Aside from the earlier mentioned, ring blowers can also be utilised to combine the plating bath fluid and can be utilized in the CZPT business as nicely in the printer sector.

Also, the blower can be utilised for other much more than thirty distinct purposes:
Such as the adsorption Dryer, Welding Fume Extraction, Pneumatic Conveying, Biogas Conveying, Sewage Treatment,Aquaculture, Printing Equipment, Slaughtering Products, CNC Engraving Equipment, resort SPA pool and Swimming Pool, Electroplating tools, Central Feeding, Textile industrial, Hospital gear, Laboratory Tests, Food Bundle, Air Purification, dust collector, dental suction device, Airport ground air-conditioning equipment, Oil and Natural gas industrial, etc
 

 

Material: Aluminum
Usage: for Air Conditioner, for Manufacture
Flow Direction: Axial Flow
Pressure: High Pressure
Certification: RoHS, ISO, CE, CCC
Power: 12.5kw

###

Samples:
US$ 2800/Piece
1 Piece(Min.Order)

|
Request Sample

###

Customization:

###

Technical parameters Technical parameters DHB 920C 12D5
Maximum airflow m3/h 1110
Maximum vacuum mbar -300
Maximum pressure mbar 270
Frequency Hz 50
Voltage V  345-415△600-690Y
Current A 28.0△/16.2Y
Output kW 12.5
Motor revolutions min-1 2800
Weight  approx Kg 187
Sound level dB (A) 74

###

Q1 How long is the blower life?
A1 3-5 years in normal condition.
Q2 How long is the warranty period for the blower?
A2 18months free warranty period, and a lifetime maintenance.
Q3 Can the blower be customized?
A3 Normal Blowers are standard parts, but the voltage can be customized. And blower can be special treatment according to customer special requirement. Also the IE2/IE3 standard blower is available.
Q4 How do you control the product's quality?
A4 All the products have quality testing and dynamic balance before delivery by Our professional QC.
Q5 How long of the loading time?
A5 5-7 days after order confirmed and receiving of deposit.
Q6 What's the of the blower usage applications?
A6 Side channel blowers have been widely used in the environmental water treatment. For example, in the aeration of sewage, ring blowers can provide oxy that the aerobe need in the activated sludge. Also, blowers can provide the conditions which make the sewage and activated sludge mixed sufficiently to dissolve all kinds of organic matters in the water. Then, the sewage water can be purified. Besides the above, ring blowers can also be used to mix the plating bath fluid and can be used in the aquaculture industry as well in the printer industry.

Also, the blower can be used for other more than 30 different applications:
Such as the adsorption Dryer, Welding Fume Extraction, Pneumatic Conveying, Biogas Conveying, Sewage Treatment,Aquaculture, Printing Equipment, Slaughtering Equipment, CNC Engraving Machine, hotel SPA pool and Swimming Pool, Electroplating equipment, Central Feeding, Textile industrial, Hospital equipment, Laboratory Testing, Food Package, Air Purification, dust collector, dental suction machine, Airport ground air-conditioning equipment, Oil and Natural gas industrial, etc;
 

Material: Aluminum
Usage: for Air Conditioner, for Manufacture
Flow Direction: Axial Flow
Pressure: High Pressure
Certification: RoHS, ISO, CE, CCC
Power: 12.5kw

###

Samples:
US$ 2800/Piece
1 Piece(Min.Order)

|
Request Sample

###

Customization:

###

Technical parameters Technical parameters DHB 920C 12D5
Maximum airflow m3/h 1110
Maximum vacuum mbar -300
Maximum pressure mbar 270
Frequency Hz 50
Voltage V  345-415△600-690Y
Current A 28.0△/16.2Y
Output kW 12.5
Motor revolutions min-1 2800
Weight  approx Kg 187
Sound level dB (A) 74

###

Q1 How long is the blower life?
A1 3-5 years in normal condition.
Q2 How long is the warranty period for the blower?
A2 18months free warranty period, and a lifetime maintenance.
Q3 Can the blower be customized?
A3 Normal Blowers are standard parts, but the voltage can be customized. And blower can be special treatment according to customer special requirement. Also the IE2/IE3 standard blower is available.
Q4 How do you control the product's quality?
A4 All the products have quality testing and dynamic balance before delivery by Our professional QC.
Q5 How long of the loading time?
A5 5-7 days after order confirmed and receiving of deposit.
Q6 What's the of the blower usage applications?
A6 Side channel blowers have been widely used in the environmental water treatment. For example, in the aeration of sewage, ring blowers can provide oxy that the aerobe need in the activated sludge. Also, blowers can provide the conditions which make the sewage and activated sludge mixed sufficiently to dissolve all kinds of organic matters in the water. Then, the sewage water can be purified. Besides the above, ring blowers can also be used to mix the plating bath fluid and can be used in the aquaculture industry as well in the printer industry.

Also, the blower can be used for other more than 30 different applications:
Such as the adsorption Dryer, Welding Fume Extraction, Pneumatic Conveying, Biogas Conveying, Sewage Treatment,Aquaculture, Printing Equipment, Slaughtering Equipment, CNC Engraving Machine, hotel SPA pool and Swimming Pool, Electroplating equipment, Central Feeding, Textile industrial, Hospital equipment, Laboratory Testing, Food Package, Air Purification, dust collector, dental suction machine, Airport ground air-conditioning equipment, Oil and Natural gas industrial, etc;
 

The benefits of using pulleys

A pulley is a mechanical device that converts force into rotation. There are many advantages to using pulleys. Let's take a look at a few of them. This article will describe the advantages, types, applications, and power sources of pulleys. You can then choose the pulley that best suits your specific needs. If you're looking for a new tool to help you with a certain task, this article is for you.
pulley

Mechanical advantage

The mechanical advantage of a pulley can be defined as the ratio of applied force to the applied force. The mechanical advantage of a pulley can be calculated by considering several factors, including weight and friction. It can be calculated by the force applied per unit length of rope and the number of pulleys used. In a single-circuit system, the force required to lift a heavy object is equal to the user's body weight.
The mechanical advantage of a pulley can be realized by comparing it to a seesaw. Both uses of rope are suitable for lifting objects. A rope four times heavier than a kilo is four times as effective. Because the forces on both sides of the pulley are equal, a small force is enough to move a large weight a short distance. The same force can be applied to a large mass to lift it several meters.
After introducing the concept of mechanical advantage, learners will practice using the pulley system. In addition to testing the pulley system, they should also calculate its mechanical advantage. Using either the instructor-provided handout or the learner's workbook, students will determine how easily the pulley system functions. Once they have completed the test, they can discuss their results and how the system can be improved. These courses are best completed as part of a mini-unit or as a standalone main course.
The mechanical advantage of the pulley system is proportional to the number of rope loops. This circuit requires the same force as the dual circuit to lift heavy objects. A single lap requires only a third of the force to lift a double lap, while three laps require almost half the energy required for a single lap. The mechanical advantage of the pulley system becomes constant as the number of cycles increases.
The 3:1 Mechanical Advantage system feels like lifting a 300-pound load with three feet of rope. The three-foot-long rope moves the load one foot high. Understanding the mechanical advantages of pulleys is critical for rescuers when trying to create the perfect pulley system. Ideally, the pulley system will be anchored to a nearby rock, tree, pole or person - if the weight is not too heavy.
pulley

Types of pulleys

There are several types of pulleys. V-belt pulleys are the type commonly used in vehicles and electric motors. "V" pulleys require a "V" belt, and some even have multiple V grooves. "V" pulleys are often used in heavy duty applications for power transmission because they reduce the risk of power slippage.
Composite pulleys combine the properties of fixed and movable pulleys. Compound pulleys are able to change the direction of force while requiring relatively low force to move even the heaviest loads. Mechanical advantage is a measure of the effectiveness of a machine or equipment. It can be divided into three categories: force, distance and mechanics. Once you understand how each type works, you can design complex machines.
Fixed pulleys: These pulleys are the most basic type of pulleys. They use ropes and slotted wheels to move with the lifted object. Because they are so simple to set up, lifting heavy objects is a breeze. Although the moving object feels light, it is actually heavier than it actually is. These pulleys are used in construction cranes, utility elevators and many different industries.
Compound Pulley System: A pulley pulley is a combination of two fixed pulleys and one movable pulley. Compound pulley systems are effective for moving heavy objects because they have the largest force multipliers and are flexible enough to change the direction of the force as needed. Composite pulley systems are commonly used in rock climbing, theater curtains and sailing. If you're looking for a pulley system, you can start by evaluating the types of pulleys and their uses.
Construction Pulleys: These are the most basic types of pulleys and have wheel rails. These pulleys can be lifted to great heights and attached to chains or ropes. They allow workers to access equipment or materials from greater heights. They are usually mounted on wheels with axles and secured with ropes. They are essential tools for construction workers. There are many different types of pulleys out there.

energy source

Belts and pulleys are mechanical devices used to transmit energy and rotational motion. The belt is connected to the rotating part of the energy source, and the pulley is mounted on the other. One pulley transmits power to the other, while the other changes the direction of the force. Many devices use this combination, including automobiles, stationary generators, and winches. It is used in many home applications, from conveyors to treadmills. Pulleys are also used for curtains in theater halls.
Pulley systems are an essential part of modern industry and everyday life. Pulleys are used in elevators, construction sites and fitness equipment. They are also used in belt-driven generators as backup power. Despite their simple and seemingly humble beginnings, they have become a versatile tool. From lifting heavy objects to guiding wind turbines, pulley systems are widely used in our daily lives.
The main reason why pulleys are so popular is the mechanical advantage they offer. They can lift a lot of weight by applying very little force over longer distances. For example, a small motor can pull 10 meters of cable, while a large motor can pull 1 meter. Also, the work done is equal to the force times the distance traveled, so the energy delivered to the large motor is the same.
The power source for the pulley system can be cables, belts or ropes. The drive element in a pulley system is usually a rope or cable. A belt is a loop of flexible material that transmits motion from one pulley to another. The belt is attached to the shaft and a groove is cut in the pulley. The belt then transfers energy from one pulley to the other through the system.
pulley

application

A pulley is a mechanical device used to lift heavy objects. They reduce the amount of work required to lift heavy objects and are an excellent choice for many applications. There are several different applications for pulleys, including elevators, grinders, planters, ladder extensions, and mountaineering or rock climbing. Let's take a look at some of the most popular uses for pulleys in modern society. These include:-
A pulley is a mechanical device that changes force. To use, you wrap the rope around it and pull down to lift the object. While this device is very useful, a major limitation of using pulleys is that you still have to apply the same force to lift the object as you would without the pulleys. This is why people use pulleys to move large objects like furniture and cars.
In addition to lifting heavy objects, pulleys are used in elevators, flagpoles and wells. These systems allow people to move heavy objects without straining their backs. Many other examples of pulleys in the home include garage doors, flagpoles, and elevators. They also help raise and lower flagpoles, which can reach several stories high.
There are two basic types of pulleys: movable and fixed. Fixed pulleys are attached to a ceiling or other object using two ropes. Modern elevators and construction cranes use movable pulleys, as do some weight machines in gyms. Composite pulleys combine movable and fixed pulleys to minimize the force required to move heavy objects.
Another type of fixed pulley is the flagpole. A flagpole can support a country, organization, or anything else that needs to be lifted. A taller flagpole creates a prouder moment for those who support it. The operation of the rope and pulley mechanism is very simple. The user simply attaches the flag to the rope, pulls the pulley, and he or she can watch the flag rise and unfold.

China Dhb 920c 12D5 12.5kw Dereike Double Stage High Air Flow Side Channel Vacuum Pump for Dust Collection and Material Handing and Pneumatic Conveying     double pulley	China Dhb 920c 12D5 12.5kw Dereike Double Stage High Air Flow Side Channel Vacuum Pump for Dust Collection and Material Handing and Pneumatic Conveying     double pulley
editor by czh 2022-11-27