China Professional Factory Supply Standard Reliable After-Market Selling Competible Weld Cylinder with 2 Year Warrenty hydraulic cylinders definition

Product Description

U-Series Hydraulic Dock Leveler
The USeries Hydraulic Dock Leveler is a modern material handling solution, renowned for its simplicity, efficiency, and reliability. At the heart of this exceptional performance lies the hydraulic cylinder, a crucial component that transforms hydraulic energy into the motive force required for leveler operation.

The hydraulic cylinder in the USeries is specifically designed to handle the unique challenges of the material handling industry. Its robust construction and advanced materials ensure durability, while the efficient design promotes maximum force output with minimal energy consumption.

A-Series Hydraulic Dock Leveler
The hydraulic cylinder in the ASeries is specifically designed to withstand the demands of 
continuous use in a wide range of environments. Its robust construction and advanced materials ensure durability, while the efficient design promotes maximum force output with minimal energy consumption.

Furthermore, the cylinder’s efficiency is key to maintaining optimal operational speed and precision. Advanced engineering features, such as optimized piston geometry and friction-reducing coatings, enhance the cylinder’s performance,contributing to the overall efficiency of the A-Series Hydraulic Dock Leveler.

 

LHP Series Hydraulic Dock Leveler
The hydraulic cylinder in the LHP Series is a master of converting hydraulic pressure into motive force. This force is pivotal in manipulating the leveler’s position, whether it’s adjusting for height differences or handling heavy loads. Its robust design and construction ensure durability, even under the most rigorous conditions.
The cylinder’s role in maintaining consistent and accurate positioning cannot be overstated. Its precision and reliability are paramount in ensuring safe and efficient operation, particularly when handling bulk materials or containers. It counteracts external forces, maintaining stability and preventing unintended movements during operation.

Verse Series Hydraulic Dock Leveler
The hydraulic cylinder, a prime mover in the Verse Series Hydraulic Dock Leveler, is responsible for converting hydraulic energy into mechanical force. This force is then used to raise and lower the dock leveler, enabling it to adapt to the height differences between the dock and the truck bed. The cylinder’s design and construction must be robust enough to withstand the rigors of continuous use in a wide range of environmental conditions.
The hydraulic cylinder’s performance is crucial for the safe and efficient operation of the dock leveler. It ensures that the leveler plate maintains a consistent and stable position, even under heavy loads. The cylinder’s reliability is further enhanced by its ability to counteract any external forces that may act on the leveler, thus preventing unintended movements.

About Us

Established in 1988, HangZhou LD Machinery Co, LTD. (hereinafter referred to “LD”) is a leading manufacturer specializing in the design, research, development, manufacture and marketing in the hydraulic industry. Being one of major suppliers of customized components and cylinders for manufacturers spreaded all over the world, the company is committed to offer high quality products with competitive prices and excellent service worldwide.

Headquartered in HangZhou City, ZHangZhoug Province, the company wholly owns a subsidiary production factory named “HangZhou YUEWEI Hydraulic Technology Co., Ltd”, which covers an area of more than  380,000 square meters, possesses abundant technical strength and sound production management system, superior machining production equipment, strict and effective quality control system, advanced and excellent inspection instruments.

More than  35 years experience in machining industry, with over  10 experienced technical engineers and  150 skilled workers, LD has a senior engineering technical team with special skills and rich experience in product design, casting, forging, and CNC machining, can handle special material, structure, defect and processing, meet the evolving needs, and provide optimal solution and real one-stop service to customers.
 

Hydraulic Cylinder Producing Process

Step1: Quality Control on Raw Material
We have our own lab in factory, inspect the raw material and do the test. For every batch of material we received, we will ask supplier provide their certificate, and then cut them to do the test again to see if the results match the certification. Also, every batch we received, we will cut them into pieces to check the air bubbles. Once they are all qualified, we will accept it, and all detail information will be recording in our ERP system. We will also pay lot of attention on the salt spray test for chrome rod. Every month, we will cut the material, put them into test machine to see if it reach the requirement. All the result will be recorded at our QC department. If customer need, we can provide it.

Step2: Quality Control on Machining

we start doing components machining from 1988 with 36 years experience now and insist doing 100% inspection. We spend lots of money, invest on auto robots and machines. Now half of the producing line is by robot so that we can ensure our quality be stable good. For every part of the cylinder, we do 3 times inspecting. Firstly, workers will do self inspection. Secondly, we have tour-hour inspection checking the products, 2 times in the morning and 2 times in the afternoon, make sure that every step is good. After the products are all completed, we will do 100% inspection. For thread, for the tolerance, everything, we need double check. Also, we have specific warehouse just for the measuring tools. Every inspector have their own measuring tool and we will check the measuring tools regularly to make sure they are all in good condition, so that the measuring results will be convincing.

Step3: Quality Control on Welding

We are qualified to AWS certification, which is very popular in North American market. First, for the visual test, we will make sure that every components are welded good, look beautiful. And the second, we need to check the penetration. We have more than 15 years experience, we do know what kind of designing angle can make the cylinder welding strong. Once we finish the first article, we will cut it and analyse the welding to see if it is fulfill the groove. And then do the radiographic testing to make sure there is no gap inside. What’s more, we will do the ultrasonic test to check the program for the robot. Now 80% of welding is doing by robot. Once the program confirmed, no 1 can change it unless the welding manager, and they only have 5% right.

Step4: Quality Control on Assembling
For assembling, we have some difference with others. The brand we uses for seals are all those famous brand like Aston, Parker, Hallite. The cylinder we give to our customer has 2 years warranty. For our company, we engrave our part number and manufacturing date for the quality warranty. So no matter for seals or any others, as long as they are parts of cylinder, if it is under 2 years, we will take responsibility for them. And we will do the test for every cylinder like for pressure after we finish assembling.

Step5: Quality Control on Painting
We have our half auto painting line. Right now, we can paint about 1500 cylinders per day, which is about 1 container. Before we do the painting, we will do the wash first and for every cylinder, we will test for hardness, thickness and adhesion to make sure the painting are all good, which will be recorded into OQC report, print out and stick on the box, ship to you with your products.

Step6: Hydraulic Cylinder Packing
For every cylinder, we have the stick to show the detail information like bore size, stroke and working pressure. And we will use individual plastic bag packing. If customer need, we can also use individual carton box packing. We will fasten 1 floor after 1 floor with plat, so customer can only cut what they need and other layer will still be fasten. Moreover, there will be plywood pallet or plywood box for customer choosing. We will also send the loading picture to customer after we ship them to make sure everything is well loaded in China.

Packing Reference

Order Process

Enterprise Features

FAQ
Q1. What is LD product’s quality assurance?
100% inspection for each product before shipping with inspection rereport for tracking.

Q2: How long is the warranty on LD products?
The warranty is 2 years for general products since the date of shipment.

Q3: How LD deal with the quality problem during warranty period?
1. LD will take the corresponding cost caused by customer local reparing. 
2. LD will provide the product by free if the repair cost is higher than the product value, but the freight involved shall be borne by customer side.

Q4: How to ensure the order can be shipped on time?
LD will send the “production schedule” every week after receiving customers’ orders. If any delays, LD will inform customers 3 weeks in advance, so as to facilitate the customer to arrange the schedule.

Q5: Does LD offer delivery service?
Yes. LD has deep cooperation with logistics companies all over the world to provide customers with quick and convenient “Door-to-Door services”,including sea, air and express.

Q6: How LD control the product quality?
1. Raw materials: We will test the material of each batch of raw materials we receive, and the piston rod will be tested with salt spray. This is to ensure that the material of our products meets the requirements at the beginning.
2. Processing: We have the leading machining equipment, and obtained ISO9001 certification.
3. Welding: Our factory is equipped with welding robots, and has obtained the AWS certification.
4. Assembly pressure test: 100% testing with OQC report for cHangZhou. The seals we use are: Hallite, Aston and Gapi

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Certification: ISO9001
Pressure: Low Pressure
Work Temperature: Normal Temperature
Acting Way: Double Acting
Working Method: Straight Trip
Adjusted Form: Regulated Type
Samples:
US$ 199/Piece
1 Piece(Min.Order)

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Request Sample

Customization:
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hydraulic cylinders

Buying Guide For Hydraulic Cylinders

Whether you are looking to replace a broken hydraulic cylinder or are interested in learning more about them, you will be glad to know that there are many options to choose from. The materials used to build cylinders, their stroke lengths and seals are just a few things to consider.

‘Parallel’ vs ‘Series’ cylinders

Choosing a hydraulic cylinder that is a good fit for your application is important. In general, there are two types of hydraulic cylinders: single-rod and tandem. In tandem cylinders, the two cylinders move in unison. This is the best way to transfer energy.
A welded body hydraulic cylinder is the most common type of hydraulic cylinder. It is used in construction equipment and other heavy industries. The cylinder body is welded in place and the base end is welded to it. It is normally rated for higher pressures.
A welded body hydraulic cylinder also has a built-in directional control valve. This valve works on both the inlet and the work ports. The oil from the pump goes through the control valves in series. This type of control valve usually has a small orifice drilled into it. It creates a pressure differential that forces the cylinders to work in unison.
Another type of hydraulic cylinder is the tie rod cylinder. It has a barrel and piston rod that is mounted on the bottom of the barrel. The piston rod operates both inside the barrel and out of the barrel.
There are many other types of hydraulic cylinders. Some of the more common include the plunger type, the tie rod type, and the single rod type. There are also many other types of cylinders, but they all have one thing in common: they use hydraulic fluid to power the piston.
The best hydraulic cylinder is one that can lift its weight. It is also important to select the best size for your application. The size of the cylinder depends on the load you intend to lift. If the loads are too large, you may have a difficult time maintaining synchronization. However, if the loads are not too heavy, you may be able to achieve the desired performance.
The hydraulic series relationship is a good place to start. If the loads are evenly distributed, the cylinders will work in unison. The flow control valves are a good way to keep cylinders in sync. A pilot-operated check valve is a good choice, as it will stop oil transfer when the mid-stroke is stopped.

Stroke lengths

Regardless of whether you’re buying a hydraulic cylinder for a small engine or a large excavator, the following guide can help you determine the optimal stroke length. The length is measured in inches. This is a standard measurement and is easy to obtain. The stroke is the distance covered by the rod and piston between the fully extended height and the fully retracted height of the cylinder.
The cylinder’s stroke can be measured in one of three ways. It can be based on the diameter of the rod, the diameter of the bore, or the difference between the maximum extended length and the minimum extended length. The cylinder’s stroke can range from a fraction of an inch to several feet. The stroke is a good indicator of the length of pull that can be exerted from the piston.
The largest part of the hydraulic cylinder is the rod. It is a round chrome-plated steel bar that performs the reciprocating motion. The diameter of the rod ranges from a few inches to twenty inches. It is referred to as the shiny part of the cylinder.
The retracted length is the distance between the centers of the mounting pins when the cylinder is closed. It is a standard measurement and can be measured with a tape measure. The retracted length is important for the proper functioning of the cylinder.
Using the retracted length, calculate the cylinder’s stroke. The stroke is the distance covered by the piston and rod between the fully extended height and the fully shortened height of the cylinder. This is the best indication of the length of pull that can be exerted.
The stroke is also the best indication of the length of lift that can be exerted from the piston. It can be measured using a caliper. The caliper can be used to measure the diameter of the rod and the thickness of the piston. It can also be used to calculate the difference between the maximum extended length and the maximum retracted length. This gives you the maximum length in the retracted position.hydraulic cylinders

Materials used

Various materials are used in the manufacture of hydraulic cylinders. The materials have to be tough and durable enough to withstand the pressures of the hydraulic fluid. Besides, the materials must also be compatible with the hydraulic fluid. If the materials are not strong enough, the cylinder may not fully stroke.
Hydraulic cylinders are made of steel and other durable materials. They can be used in a variety of applications. They are used in manufacturing, construction, mining, and industrial technology. They can also be found in the aviation and aircraft industry. They have also been used in forestry.
Most hydraulic cylinders are made of 1018/1020 cold rolled steel. They are usually coated with Hard Chrome Plating to prevent corrosion. A variety of coatings are also available for cylinders.
In hydraulic systems, the fluid used is usually mineral oil or water glycol. Some cylinders also use fire resistant water glycol-based fluid. However, this type of fluid may still cause lubrication problems.
Another material used in hydraulic cylinders is stainless steel. These are generally inexpensive and easy to find. They are also environmentally friendly and work well with fuels and solvents. They are also durable in acidic environments.
Composite materials have also been used in the aerospace industry for years. They have also been used in high pressure vessels for CNG storage. They have a higher strength to weight ratio than steel. They have also been used in the automotive industry for many years.
The seal, piston, and steel ring work together to provide stability and control. They can also help ensure that the cylinder remains in place. These materials are also used for double-acting cylinders, which have ports on either side of the piston rod. The pressure on both sides of the piston rod helps control the movement of the cylinder.
Another type of cylinder is the tie rod style. This type of cylinder uses high-strength threaded steel tie rods to secure the cylinder. The tie rods stretch at high pressures, which allows the cylinder to function efficiently. The cylinders are commonly used in industrial factory applications.hydraulic cylinders

Seals

Choosing the right seals for hydraulic cylinders is crucial to the functioning of a hydraulic system. These seals are designed to protect the internal components of the cylinder from contamination and leakage. They are used in various industries, including construction, agriculture and industrial plants.
Hydraulic cylinder seals come in a variety of designs. They are used in both static and dynamic applications. They are also subjected to high temperatures and high pressures. Therefore, they must be made of the right material to withstand the tough conditions. The seals must also be able to resist the change of hydraulic fluid.
Hydraulic cylinder seals are made from materials such as PTFE, polyurethane and rubber. These materials provide a durable seal for cylinders. They are also resistant to abrasion and tearing.
Seals for hydraulic cylinders are categorized into static and dynamic designs. Static seals are typically found in round cross-sections. They are used between the piston and the cylinder pipe. They are also known as gland seals. These seals are usually attached to the cylinder pipe with a threaded connection. The gland seal usually includes a wiper ring that keeps the interior of the cylinder clean and free from contamination.
Hydraulic cylinder seals also must be able to withstand high temperatures and high pressures. They are used in a variety of applications, including logging equipment. The main sealing material for hydraulic cylinders is polyurethane.
Seals for hydraulic cylinders can be made from thermoplastic or elastomeric polymers. These materials combine the strength of plastic with the flexibility of rubber. Thermoplastic elastomers also have better elasticity, enabling them to maintain constant pressure for longer periods of time.
In dynamic sealing systems, low friction coefficients are a basic requirement. This is due to the need for maximum tightness in dynamic conditions. Seal materials must also be capable of forming a tight seal against irregular metal surfaces.
The seal material must also be able to expand rapidly to follow dimensional changes. This is important for high-pressure cylinders, as they may undergo deformation. It is also important to use a material that can withstand corrosion.
China Professional Factory Supply Standard Reliable After-Market Selling Competible Weld Cylinder with 2 Year Warrenty   hydraulic cylinders definitionChina Professional Factory Supply Standard Reliable After-Market Selling Competible Weld Cylinder with 2 Year Warrenty   hydraulic cylinders definition
editor by Dream 2024-05-09

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