Product Description
2pc stainless steel ball valves screw end rptfe
Product Description
Stainless steel ball valves are highly resistant to corrosion and can withstand extreme temperatures and pressures. They are durable, easy to clean, and require minimal maintenance. They are also versatile and can be used in a variety of applications, including in the food and beverage industry, pharmaceuticals, and oil and gas. The ball valve design allows for quick and easy shut off, making it an ideal choice for controlling flow. Stainless steel ball valves are a reliable and cost-effective solution for fluid control.
Specifications
2pc stainless steel ball valves screw end rptfe
| Standard | |
| Thread | NPT BSPT DIN259. DIN2999. ISO228 |
| Max. Pressure | 6.4MPa |
| Working Temperature | -20:C-232:C |
| Bore | Full & Reducing |
| Body Art | Casting & Forging |
| Material of Main Parts | |
| Body | CF8. CF8M. WCB SS304. SS316 |
| Stem | SS304. SS316 |
| Ball | SS304. SS316 |
| Seat | PTFE |
| Nut & Bolt | SS304 |
Application
Fluido Stainless Steel Ball valves are suitable for use on various kinds of pipelines of Class 150 – Class 2500 to turn on and off the pipeline medium, of which the actuators include manual, worm gear, and pneumatic or electric. Medium includes water, steam, oil, gas, nitric acid, and etc.
Our Factory
Certifications
After Sales Service
1. One year warranty
2. Spare parts provided such as extra gaskets
3. Strict market agent protection agreement if you want to be distributor
4. OEM&ODM are welcome, customer logo can be casted on to valve body if you need
5. First order and large order have a good discount.
6. Always most competitive price, most reliable quality and best service as your biggest support.
Company Profile
Our Advantages
1)Industry leader:
HangZhou CHINAMFG Industrial Co.,Ltd has been specilized in Pipeline Products since 2004.With decades of development, CHINAMFG possesses 20 engineers, 200 experienced workers, and 25 professional sales teams and has supplied pipeline products, solutions and services to over 30 countries. Quality is strictly controlled and guaranteed.
2)Large Productivity
HangZhou CHINAMFG Industrial Co.,Ltd’ productivity is large and stock for some of the pipe fittings is also available. so the mass production lead time is short.
3)VIP Service
Professional Technical engineers and sales teams guarantee quality and service.
4)OEM is also available
We have a professional technical team and a complete supply chain to realize casting, forging, machining etc.,
FAQ:
Q1:What certificate do you have?
A: We have ISO 9001, CE certificate.
Q2. Can I get free samples?
A: Yes, The free samples can be offered for free.
Q3. Can I have my own Logo on the product?
A: Yes, a Simple logo design is available based on not small order quantity.
Q4: Can I have my own customized product?
A: Yes, your customized requirements for color, size, mark, etc.
Q5: Can you produce the products according to my own drawing?
A: Yes, we can produce the products according to your drawing.
Q6: How long is your delivery time?
A: Generally it is about 30-45 days depending on the order quantity.
Q7:What’s your product range?
A: HangZhou CHINAMFG INDUSTRIAL Co., Ltd is a leading manufacturer and exporter of various iron and steel valves, fittings and flanges. Its main products include Valves: Cast iron/Ductile iron/Cast steel valves (DIN3352 Resilient seated F4/F5 Gate valves, DIN3352 F4/F5 metal seated Gate valves, BS5163/BS5150/AWWA C509 Gate valves, API600 Gate valves, Cast iron butterfly valves, DIN/ANSI Globe valves, Wafer/swing check valves and Y-strainers. Pipe fittings: Butt Welding Pipe Fittings, high-pressure pipe fittings, stainless steel screw fittings, pipe nipples and coupling. Flanges: Flat flanges, welding neck flanges, slip on flanges and blind flanges. We have passed not only the European CE certification for our valves and flanges but also the ISO9001 assessment and registration by SGS for quality management. By virtue of 20+ years′ business accumulation in more than 35 countries/regions, CHINAMFG has been receiving CHINAMFG attention. “Trust from quality”, with years of industrial experience, mature quality control, stable business operation processes, and continuously developing ideas, CHINAMFG is your best partner. Welcome to contact us, and we are committed to meeting all of your needs!
MONIA WANG
HangZhou CHINAMFG INDUSTRIAL CO LTD
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| Media: | Water |
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| Material: | Stainless Steel |
| Connection Form: | Flange |
| Samples: |
US$ 10/Piece
1 Piece(Min.Order) | Order Sample |
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| Customization: |
Available
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Shipping Cost:
Estimated freight per unit. |
about shipping cost and estimated delivery time. |
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| Payment Method: |
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Initial Payment Full Payment |
| Currency: | US$ |
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| Return&refunds: | You can apply for a refund up to 30 days after receipt of the products. |
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What are the limitations of using worm screws in mechanical designs?
While worm screws offer several advantages in mechanical designs, they also have some limitations that should be considered. Here are the key limitations of using worm screws:
- Lower Mechanical Efficiency: Worm screw mechanisms tend to have lower mechanical efficiency compared to other gear systems. This is primarily due to the sliding contact between the worm screw threads and the worm wheel teeth, which results in higher friction and energy losses. The lower mechanical efficiency can lead to heat generation, reduced power transmission, and decreased overall system efficiency. It’s important to consider the trade-off between the desired gear reduction and the mechanical efficiency requirements of the specific application.
- Limited High-Speed Applications: Worm screws are not well-suited for high-speed applications. The sliding contact and meshing action between the threads and teeth can generate heat and cause wear at high rotational speeds. Additionally, the higher friction and lower mechanical efficiency mentioned earlier can limit the maximum achievable speed of the system. If high-speed operation is a requirement, alternative gear systems, such as spur gears or helical gears, may be more suitable.
- Backlash: Worm screw mechanisms can exhibit a certain amount of backlash, which is the lost motion or clearance between the threads and teeth when changing direction. Backlash can negatively impact precision and positioning accuracy in applications that require tight tolerances. It’s important to consider backlash and implement measures to minimize its effects, such as using anti-backlash mechanisms or incorporating backlash compensation techniques.
- Material Selection: The choice of materials for worm screws is crucial to ensure their durability and performance. Worm screws typically require harder materials to withstand the sliding contact and high contact pressures between the threads and teeth. The selection of suitable materials may increase the manufacturing complexity and cost of the worm screw assembly. Additionally, the choice of materials should consider factors such as compatibility, wear resistance, and the specific operating conditions of the application.
- Load Distribution: In worm screw mechanisms, the load is distributed over a limited number of teeth on the worm wheel. This concentrated load distribution can result in higher stresses and wear on the contacting surfaces. It’s important to consider the load capacity and contact area of the worm wheel teeth to ensure that the assembly can handle the anticipated loads without premature failure or excessive wear.
- Required Lubrication: Proper lubrication is crucial for the smooth operation and longevity of worm screw mechanisms. Lubrication helps reduce friction, wear, and heat generation between the contacting surfaces. However, the need for lubrication adds complexity to the design and maintenance of the system. It requires regular monitoring of lubricant levels and periodic lubricant replenishment or replacement. Failure to maintain proper lubrication can result in increased friction, wear, and potential system failure.
Despite these limitations, worm screws continue to be widely used in various mechanical designs due to their unique characteristics and advantages. It’s essential to carefully evaluate the specific requirements and constraints of the application and consider alternative gear systems if the limitations of worm screws pose significant challenges to the desired performance and efficiency.
Are there different types of worm screws available?
Yes, there are different types of worm screws available to suit various applications and requirements. The design and characteristics of a worm screw can vary based on factors such as the material used, the thread geometry, the type of worm wheel, and the intended application. Here are some common types of worm screws:
- Standard Worm Screws: Standard worm screws are the most commonly used type and are available in a wide range of sizes and materials. They typically have a single-start thread and are made from materials such as steel, stainless steel, or bronze. Standard worm screws are suitable for general-purpose applications where moderate precision and load capacity are required.
- Double-Enveloping Worm Screws: Double-enveloping worm screws, also known as hourglass worm screws, have a unique thread profile that improves contact and load distribution between the worm screw and the worm wheel. This design offers enhanced torque transmission, higher efficiency, and increased load-carrying capacity compared to standard worm screws. Double-enveloping worm screws are often used in heavy-duty applications, such as gearboxes and high-load power transmission systems.
- Low-Lead Worm Screws: Low-lead worm screws have a smaller thread lead angle compared to standard worm screws. This design reduces the amount of sliding contact between the threads of the worm screw and the teeth of the worm wheel, resulting in lower friction and improved efficiency. Low-lead worm screws are commonly used in applications where high efficiency and reduced heat generation are critical, such as in precision machinery and high-speed gear systems.
- Self-Locking Worm Screws: Self-locking worm screws are designed to have a high friction angle between the threads, making them capable of preventing reverse motion or backdriving. This self-locking feature eliminates the need for additional braking mechanisms or external locking devices in certain applications. Self-locking worm screws are commonly used in vertical lift systems, hoists, and other applications where holding the load position is essential.
- High-Precision Worm Screws: High-precision worm screws are manufactured to tighter tolerances and have improved accuracy compared to standard worm screws. They are designed to provide precise positioning and motion control in applications where high accuracy and repeatability are required. High-precision worm screws are often used in CNC machines, robotics, and other precision equipment.
- Customized Worm Screws: In addition to the standard types mentioned above, worm screws can also be customized to meet specific application requirements. Customized worm screws may involve variations in thread geometry, pitch, diameter, materials, or other parameters to suit unique applications or performance specifications.
The selection of the appropriate type of worm screw depends on factors such as the desired load capacity, efficiency requirements, backlash tolerance, positional accuracy, and environmental conditions. It is important to consult with manufacturers, engineers, or experts familiar with worm screw applications to determine the most suitable type for a specific application.
How do you calculate the gear ratio for a worm screw and gear setup?
In a worm screw and gear setup, the gear ratio is determined by the number of teeth on the worm wheel (gear) and the number of threads on the worm screw. The gear ratio represents the relationship between the rotational speed of the worm screw and the resulting rotational speed of the worm wheel. The formula to calculate the gear ratio is as follows:
Gear Ratio = Number of Teeth on Worm Wheel / Number of Threads on Worm Screw
Here’s a step-by-step process to calculate the gear ratio:
- Count the number of teeth on the worm wheel. This can be done by visually inspecting the gear or referring to its specifications.
- Count the number of threads on the worm screw. The threads refer to the number of complete turns or helical grooves wrapped around the cylindrical body of the worm screw.
- Divide the number of teeth on the worm wheel by the number of threads on the worm screw.
- The result of the division is the gear ratio. It represents the number of revolutions of the worm screw required to complete one revolution of the worm wheel.
For example, let’s say the worm wheel has 40 teeth, and the worm screw has 2 threads. Using the formula, we can calculate the gear ratio as follows:
Gear Ratio = 40 teeth / 2 threads = 20
In this case, for every full revolution of the worm screw, the worm wheel will rotate 1/20th of a revolution. This indicates a significant speed reduction, resulting in high torque output at the worm wheel.
It’s important to note that the gear ratio calculated using this formula assumes an ideal scenario without considering factors like friction, efficiency losses, or the pitch diameter of the gears. In practical applications, these factors may affect the actual gear ratio and performance of the worm screw and gear setup.
editor by Dream 2024-05-15