China Good quality Used Submersible Pump Dredging Pump Dredge Machine for Sale Centrifugal Vacuum Pump vacuum pump belt

Product Description

Model Number 200River350-15
Structure: double pump
Output flow 400m3/
Graininess 35mm
Pressure 20
Power source Hydraulic
Water outlet: 200mm
Core Components Pump

ZheJiang River Machinery Co., Ltd.
is 1 of Chinese earliest companies that devoted to design and produce of river dredging equipment. With many years business experience ahead the amphibious excavator industry. We have our own R & D, production, sales and engineering teams. Our trusted customer covers more than 50 cities all over China, as well as overseas clients in Poland, Russia, Africa, Indonesia and other countries.We continuously strive to achieve world class results in the manufacture and sale of our products. We have many years of construction experience in river dredging, environmental development, pipeline construction, our goal is to continuously earn complete customer satisfaction by supplying top quality, defect-free product on time, and to be the leading solution provider of amphibious excavator and dredging equipment with continuous improvement and well maintenance backup services. Our main business includes the sales of amphibious excavators, manufacturing of amphibious pontoon undercarriage, modification of amphibious excavators, cutter suction pumps, long reach boom manufacturing etc. We look CZPT to providing you with the best solutions and service!
1. Our company started as a project construction, and has more than 20 years of experience in the construction of amphibious equipment. It is reliable to apply the experience summarized from practice to product.You can customize installation and other service according to your requirements, which can solve a series of troubles in the installation process, let your amphibious equipment work more efficiency, and improve your economic benefits.

2. The pontoon undercarriage is made of plates with higher yield and impact resistance. All products have passed IOS9001 certification and strict factory inspection standards, so you have no worries.The internal structure of the pontoon are designed to be fully functional, modular, stable, and cost effective, the overall weight is reduced and the safety and stability are guaranteed.

3. we cooperate with various excavator brands and models and only need to buy the upper part of the excavator. The brand selection includes CZPT / CZPT / CZPT /JCB/.

4. The special design of the Crawler chain and track shoe structure makes the amphibious excavator more slip resistant and not easy to bend.

Q:I am a personal engineering contractor. The current price is still high for me. What should I do?
A:We can replace the original CZPT engine with a Chinese-made engine with similarperformance but at a lower price.

Q:I want to modify my land excavator into amphibious, what details do I need to provide so as to get a proper quotation?
A:Please provide us the brand model of your existing crawler excavator. If it is not a standard model, please provide the weight of the excavator and measure the dia meter and bolt hole spacing of the central connection(CAD design is better).

Q:The height of the modified excavator has increased a lot. Will the operating range change a lot?
A:After the modification, the original arm can meet most construction conditions. In some special construction environments, the original boom can be replaced by an long boom. And can install equipment such as a suction pump.

Q:I don’t have people who knows how to install the pontoon. How could I do?
A:We use the pin design to connect the components, can be installed without professional training.We also provide a video of the on-site installation process for reference.


Q:I don’t have driver who has driven an amphibious excavator. How could I do?
A:The operation of an amphibious excavator is the same as the normal excavator. No need to hire a professional amphibious excavator operator. If there is a need, we can provide short-term operation training, or send a professional to the site to guide installation, operation, maintenance, etc.

Q:Your pontoon has no check holes, how to maintain it?
A:When maintenance is required, an opening can be cut directly in the check hole position. After the maintenance is completed, use the repair plate to seal the opening.

Q:What part is included in the one-year warranty?
A:Pontoon cabin warranty for 1 year, Travel Motor warranty for 3 months. Consumables such as chains, chain plates, wear strips, etc. are not included.

Q:How long is the lead time?
A:Custom pontoon requires 15 natural days, we have 20 tons pontoon in stock all year round.

Q:What are the payment methods?
A:We accept TT 30%, letter of credit. And you can place an order directly on the Alibpba website.

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After-sales Service: We Provide 24 Hours * 7 Days
Warranty: 1 Year
Type: Amphibious Excavator
Usage: Marine Excavator, Mining Excavator
Bucket: Hydralic Cutter
Transmission: Hydraulic Transmission
US$ 61540/per unit
1 per unit(Min.Order)




Vacuum Pump

Types of vacuum pumps

A vacuum pump is a device that draws gas molecules from a sealed volume and leaves a partial vacuum in its wake. Its job is to create a relative vacuum within a specific volume or volume. There are many types of vacuum pumps, including centrifugal, screw and diaphragm.

Forward centrifugal pump

Positive displacement centrifugal vacuum pumps are one of the most commonly used pump types in the oil and gas industry. Their efficiency is limited to a range of materials and can handle relatively high solids concentrations. However, using these pumps has some advantages over other types of pumps.
Positive displacement pumps have an enlarged cavity on the suction side and a reduced cavity on the discharge side. This makes them ideal for applications involving high viscosity fluids and high pressures. Their design makes it possible to precisely measure and control the amount of liquid pumped. Positive displacement pumps are also ideal for applications requiring precise metering.
Positive displacement pumps are superior to centrifugal pumps in several ways. They can handle higher viscosity materials than centrifuges. These pumps also operate at lower speeds than centrifugal pumps, which makes them more suitable for certain applications. Positive displacement pumps are also less prone to wear.
Positive displacement vacuum pumps operate by drawing fluid into a chamber and expanding it to a larger volume, then venting it to the atmosphere. This process happens several times per second. When maximum expansion is reached, the intake valve closes, the exhaust valve opens, and fluid is ejected. Positive displacement vacuum pumps are highly efficient and commonly used in many industries.

Self-priming centrifugal pump

Self-priming centrifugal pumps are designed with a water reservoir to help remove air from the pump. This water is then recirculated throughout the pump, allowing the pump to run without air. The water reservoir can be located above or in front of the impeller. The pump can then reserve water for the initial start.
The casing of the pump contains an increasingly larger channel forming a cavity retainer and semi-double volute. When water enters the pump through channel A, it flows back to the impeller through channels B-C. When the pump is started a second time, the water in the pump body will be recirculated back through the impeller. This recycling process happens automatically.
These pumps are available in a variety of models and materials. They feature special stainless steel castings that are corrosion and wear-resistant. They can be used in high-pressure applications and their design eliminates the need for inlet check valves and intermediate valves. They can also be equipped with long intake pipes, which do not require activation.
Self-priming centrifugal pumps are designed to run on their own, but there are some limitations. They cannot operate without a liquid source. A foot valve or external liquid source can help you start the self-priming pump.

Screw Pump

The mechanical and thermal characteristics of a screw vacuum pump are critical to its operation. They feature a small gap between the rotor and stator to minimize backflow and thermal growth. Temperature is a key factor in their performance, so they have an internal cooling system that uses water that circulates through the pump’s stator channels. The pump is equipped with a thermostatically controlled valve to regulate the water flow. Also includes a thermostatic switch for thermal control.
Screw vacuum pumps work by trapping gas in the space between the rotor and the housing. The gas is then moved to the exhaust port, where it is expelled at atmospheric pressure. The tapered discharge end of the screw further reduces the volume of gas trapped in the chamber. These two factors allow the pump to work efficiently and safely.
Screw vacuum pumps are designed for a variety of applications. In some applications, the pump needs to operate at very low pressures, such as when pumping large volumes of air. For this application, the SCREWLINE SP pump is ideal. Their low discharge temperature and direct pumping path ensure industrial process uptime. These pumps also feature non-contact shaft seals to reduce mechanical wear. Additionally, they feature a special cantilever bearing arrangement to eliminate potential sources of bearing failure and lubrication contamination.
Screw vacuum pumps use an air-cooled screw to generate a vacuum. They are compact, and clean, and have a remote monitoring system with built-in intelligence. By using the app, users can monitor pump performance remotely.
Vacuum Pump

Diaphragm Pump

Diaphragm vacuum pumps are one of the most common types of vacuum pumps found in laboratories and manufacturing facilities. The diaphragm is an elastomeric membrane held in place around the outer diameter. While it is not possible to seal a diaphragm vacuum pump, there are ways to alleviate the problems associated with this design.
Diaphragm vacuum pumps are versatile and can be used in a variety of clean vacuum applications. These pumps are commercially available with a built-in valve system, but they can also be modified to include one. Because diaphragm pumps are so versatile, it’s important to choose the right type for the job. Understanding how pumps work will help you match the right pump to the right application.
Diaphragm vacuum pumps offer a wide range of advantages, including an extremely long service life. Most diaphragm pumps can last up to ten thousand hours. However, they may be inefficient for processes that require deep vacuum, in which case alternative technologies may be required. Additionally, due to the physics of diaphragm pumps, the size of these pumps may be limited. Also, they are not suitable for high-speed pumping.
Diaphragm vacuum pumps are a versatile subset of laboratory pumps. They are popular for their oil-free construction and low maintenance operation. They are available in a variety of styles and have many optional features. In addition to low maintenance operation, they are chemically resistant and can be used with a variety of sample types. However, diaphragm pumps tend to have lower displacements than other vacuum pumps.

Atmospheric pressure is a key factor in a vacuum pump system

Atmospheric pressure is the pressure created by the collision of air molecules. The more they collide, the greater the pressure. This applies to pure gases and mixtures. When you measure atmospheric pressure, the pressure gauge reads about 14.7 psia. The higher the pressure, the greater the force on the gas molecules.
The gas entering the vacuum pump system is below atmospheric pressure and may contain entrained liquids. The mechanism of this process can be explained by molecular kinetic energy theory. The theory assumes that gas molecules in the atmosphere have high velocities. The resulting gas molecules will then start moving in random directions, colliding with each other and creating pressure on the walls of the vacuum vessel.
Atmospheric pressure is a critical factor in a vacuum pump system. A vacuum pump system is useless without proper atmospheric pressure measurement. The pressure in the atmosphere is the total pressure of all gases, including nitrogen and oxygen. Using total pressure instead of partial pressure can cause problems. The thermal conductivity of various gases varies widely, so working at full pressure can be dangerous.
When choosing a vacuum pump, consider its operating range. Some pumps operate at low atmospheric pressure, while others are designed to operate at high or ultra-high pressure. Different types of pumps employ different technologies that enhance their unique advantages.
Vacuum Pump

The screw pump is less efficient in pumping gases with smaller molecular weight

Vacuuming requires a high-quality pump. This type of pump must be able to pump gas of high purity and very low pressure. Screw pumps can be used in laboratory applications and are more efficient when pumping small molecular weight gases. Chemical resistance is critical to pump life. Chemical resistant materials are also available. Chemically resistant wetted materials minimize wear.
Gear pumps are more efficient than screw pumps, but are less efficient when pumping lower molecular weight gases. Gear pumps also require a larger motor to achieve the same pumping capacity. Compared to gear pumps, progressive cavity pumps also have lower noise levels and longer service life. In addition, gear pumps have a large footprint and are not suitable for tight spaces.
Progressive cavity pumps have two or three screws and a housing and side cover. They are also equipped with gears and bearings. Their mechanical design allows them to operate in high pressure environments with extremely low noise. The progressive cavity pump is a versatile pump that can be used in a variety of applications.
Dry screw compressors have different aspect ratios and can operate at high and low pressures. The maximum allowable differential pressure for screw compressors ranges from 0.4 MPa for 3/5 rotors to 1.5 MPa for 4/6 rotors. These numbers need to be determined on a case-by-case basis.

China Good quality Used Submersible Pump Dredging Pump Dredge Machine for Sale Centrifugal Vacuum Pump   vacuum pump belt	China Good quality Used Submersible Pump Dredging Pump Dredge Machine for Sale Centrifugal Vacuum Pump   vacuum pump belt
editor by CX 2024-04-12