Product Description

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 forward 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 CZPT 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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Types of vacuum pumps

A vacuum pump is a device that draws gas molecules from a sealed volume and maintains a partial vacuum. Its job is to create a vacuum in a volume, usually one of several. There are several types of vacuum pumps, such as root pumps, diaphragm pumps, rotary piston pumps, and self-priming centrifugal pumps.

The diaphragm pump is a dry positive displacement vacuum pump

Diaphragm pumps are a versatile type of vacuum pump. They can be installed in a variety of scenarios including container emptying, positive suction, and simultaneous fluid mixing. Their performance depends on the stiffness and durability of the diaphragm, which in turn depends on the material.
They have good performance when running in dry mode. Diaphragm pumps work very similarly to the human heart, which is why they are often used to create artificial hearts. In addition, the diaphragm pump is self-priming and has high efficiency. They are also capable of handling the most viscous liquids and are used in almost all industries.
However, this type of pump has several disadvantages. One of them is that they are difficult to restart after a power outage. Another disadvantage is that they can generate a lot of heat. Fortunately, this heat is carried away by airflow. However, this heat builds up in the multistage pump. If this happens, the diaphragm or motor may be damaged. Diaphragm pumps operating in two or more stages should be fitted with solenoid valves to maintain vacuum stability.
Diaphragm pumps are a good choice for drying processes where hygiene is important. These pumps have check valves and rubber or Teflon diaphragms. Diaphragm pumps are also ideal for high viscosity applications where shear sensitivity is important.

Roots pumps are dry method centrifugal pumps

Roots pumps use a vane rotor pump with two counter-rotating vanes that move in opposite directions to move the gas. They are often the first choice for high-throughput process applications. Depending on the size and number of blades, they can withstand up to 10 Torr.
Centrifugal pumps have several advantages, including the ability to handle corrosive fluids and high temperatures. However, when choosing a pump, it is essential to choose a reputable manufacturer. These companies will be able to advise you on the best pump design for your needs and provide excellent after-sales support. Roots pumps can be used in a wide range of industrial applications including chemical, food, and biotechnology.
The Roots pump is a dry centrifugal pump whose geometry enables it to achieve high compression ratios. The screw rotors are synchronized by a set of timing gears that allow gas to pass in both directions and create a compressed state in the chamber. The pre-compressed gas is discharged through a pressure connection and cooled with water. Some pumps are also able to accept additional cooling gas, but this should be done with caution.
The size of the impeller plays an important role in determining the pump head. The impeller diameter determines how high the pump can lift the liquid. Impeller speed also affects the head. Since the head is proportional to the specific gravity of the liquid, the available suction pressure will be proportional to the density of the liquid. The density of water is about 1.2 kg/m3, and the suction pressure of the centrifugal pump is not enough to lift the water.

The rotary vane pump is a self-priming centrifugal pump

A rotary vane pump is a centrifugal pump with a circular pump head and a cycloid cam that supports the rotor. The rotor is close to the cam wall, and two side plates seal the rotor. Vanes in vane pumps are installed in these cavities, and the rotor rotates at high speed, pushing fluid in and out of the pump. The pump offers several advantages, including a reversible design and the ability to handle a wide variety of clean fluids.
Agknx Pumps manufactures a wide range of vane pumps that combine high performance, low cost, and easy maintenance. These pumps handle medium to high viscosity liquids up to 500 degrees Fahrenheit and 200,000 SSU.
The suction side of the rotary vane pump has a discharge port, and the valve prevents the backflow of the discharge air. When the maximum pressure is reached, the outlet valve closes to prevent the backflow of exhaust gas. The mechanical separation step separates the oil from the gas in the pump circuit and returns the remaining oil particles to the sump. The float valve then reintroduces these oil particles into the oil circuit of the pump. The gas produced is almost oil-free and can be blown out of a pipe or hose.
Rotary vane pumps are self-priming positive displacement pumps commonly used in hydraulic, aeration, and vacuum systems. Unlike gear pumps, rotary vane pumps can maintain high-pressure levels while using relatively low suction pressures. The pump is also very effective when pumping viscous or high-viscosity liquids.

Rotary piston pumps are dry method positive displacement pumps

Rotary piston pumps are dry positive displacement pumps designed to deliver high-viscosity fluids. They are capable of pumping a variety of liquids and can run dry without damaging the liquid. Rotary piston pumps are available in a variety of designs. Some are single shafts, some are two shafts and four bearings.
Positive displacement pumps operate slower than centrifugal pumps. This feature makes the positive displacement pump more sensitive to wear. Piston and plunger reciprocating pumps are particularly prone to wear. For more demanding applications, progressive cavity, diaphragm or lobe pumps may be a better choice.
Positive displacement pumps are typically used to pump high-viscosity fluids. This is because the pump relies on a mechanical seal between the rotating elements and the pump casing. As a result, when fluids have low viscosity, their performance is limited. Additionally, low viscosity fluids can cause valve slippage.
These pumps have a piston/plunger arrangement using stainless steel rotors. Piston/piston pumps have two cavities on the suction side. The fluid then flows from one chamber to the other through a helical motion. This results in very low shear and pulsation rates. The pump is usually installed in a cylindrical housing.

Rotary vane pump corrosion resistance

Rotary vane vacuum pumps are designed for use in a variety of industries. They feature plasma-treated corrosion-resistant parts and anti-suck-back valves to help reduce the number of corrosive vapors entering the pump. These pumps are commonly used in freeze dryers, vacuum ovens, and degassing processes. The high flow rates they provide in their working vacuum allow them to speed up processes and reduce the time it takes to run them. Plus, they have energy-efficient motors and silent volume. <br/While rotary vane vacuum pumps are relatively corrosion resistant, they should not be used for aggressive chemicals. For these chemicals, the most suitable pump is the chemical mixing pump, which combines two types of pumps to improve corrosion resistance. If the application requires a more powerful pump, a progressive cavity pump (eg VACUU*PURE 10C) is suitable.
Oil seals used in rotary vane pumps are important to pump performance. The oil seal prevents corrosion of the aluminum parts of the rotary vane pump and prolongs the service life. Most rotary vane vacuum pumps have a standard set of components, although each component may have different oil seals.
Rotary vane vacuum pumps are the most common type of positive displacement pump. They provide quiet operation and long service life. They are also reliable and inexpensive and can be used in a variety of applications.

Roots pumps are primarily used as a vacuum booster

Root vacuum pumps are mainly used as vacuum boosters in industrial applications. They need a thorough understanding of operating principles and proper maintenance to function properly. This course is an introduction to Roots vacuum pumps, covering topics such as pump principles, multi-stage pumps, temperature effects, gas cooling, and maintenance.
Roots pumps have many advantages, including compact and quiet operation. They do not generate particles and have a long service life. They also don't require oil and have a small footprint. However, Roots pumps have several disadvantages, including relatively high maintenance costs and low pumping speeds near atmospheric pressure.
Root vacuum pumps are often used with rotary vane vacuum pumps. They work on the same principle, the air enters a conveying unit formed by two rolling pistons in the housing. The piston heads are separated from each other, and the air passes through the unit without being reduced until it is discharged. When the air in the next unit reaches a higher absolute pressure, it is expelled from the last unit.
Roots pumps can be classified as sheathed or sealed. Roots pumps with sealed motors are suitable for pumping toxic gases. They have less clearance between the stator and motor rotor and have a sealed tank.

editor by czh 2022-12-06