Product Description
Manual Flanged Hard - Sealed Butterfly Valve Product Details
1. Basic Category Attributes
(1) Valve Type
It is a manual flanged hard - sealed butterfly valve. It uses a handle to drive the valve stem, which then rotates the butterfly plate around the axis. This realizes the on - off control and flow regulation of the pipeline medium. It belongs to the butterfly valve category and is a common device for and regulating media in industrial pipeline systems.
(2) Connection Form
Adopts flange connection. The valve body has flanges at both ends, which are fastened to the pipeline flanges with bolts. This connection method has high structural stability and is suitable for various industrial pipeline systems, ensuring reliable connection and sealing performance.
2. Structural and Working Principle
(1) Main Components
- Butterfly Plate: A disc - shaped metal component (the rotatable part in the center of the valve body in the figure). It rotates 0° - 90° around the valve stem axis to change the flow area with the valve seat, thereby controlling the on - off and flow of the medium.
- Valve Seat: Usually a metal sealing surface (matching the butterfly plate). In some cases, hard alloys (such as Stellite alloy) may be surfacing - welded on it to enhance wear resistance and corrosion resistance.
- Valve Stem: Passes through the valve body and the butterfly plate to transmit the torque of the handle and drive the butterfly plate to rotate. It is generally made of stainless steel to ensure strength and corrosion resistance.
- Handle and Transmission Mechanism: The handle is the manual operation part. Through the gear or worm gear transmission mechanism (the gear structure connected to the handle in the figure), the manual rotation force is converted into the torque of the valve stem to realize the opening and closing of the butterfly plate.
(2) Working Principle
When the handle is rotated, the transmission mechanism drives the valve stem to rotate, and then the valve stem drives the butterfly plate to rotate in the valve body. When the butterfly plate is parallel to the medium flow direction, the valve is fully open; when the butterfly plate is perpendicular to the medium flow direction, the valve is fully closed. By controlling the rotation angle of the butterfly plate, the flow of the medium can be adjusted. The hard - sealed structure relies on the close fit of metal surfaces to achieve sealing, which is suitable for harsh working conditions such as high temperature, high pressure, and strong corrosion.
3. Material Attributes
(1) Valve Body Material
Common materials include cast steel, stainless steel (such as 304, 316), etc. Cast steel has high strength and good adaptability to general industrial media; stainless steel has excellent corrosion resistance and is suitable for media with strong corrosiveness such as acids and alkalis.
(2) Butterfly Plate Material
Mainly made of stainless steel or surfacing - welded with hard alloys on the basis of carbon steel. Stainless steel butterfly plates have good corrosion resistance; surfacing - welded hard alloys can enhance the wear resistance of the butterfly plate, making it suitable for media containing particles or with high wear.
(3) Valve Seat Sealing Material
It is a metal - to - metal hard - sealed structure. The valve seat and the butterfly plate are both metal materials, and some may be treated with surfacing welding, spraying, etc. to improve sealing performance and service life.
(4) Valve Stem Material
Usually made of stainless steel to ensure sufficient strength and corrosion resistance, preventing the valve stem from rusting, jamming, etc. during use, and ensuring the flexible operation of the butterfly plate.
(5) Handle and Transmission Mechanism Material
The handle is generally made of engineering plastics or metal materials. Engineering plastics are lightweight and corrosion - resistant; metal handles have higher strength. The transmission mechanism components (such as gears, worm gears) are usually made of metal materials to ensure transmission accuracy and service life.
4. Performance Parameter Attributes
(1) Nominal Diameter (DN)
The common range is DN50 - DN1200 (specific specifications are determined by product models), which can be adapted to pipeline systems of different diameters to meet the needs of various industrial applications.
(2) Nominal Pressure (PN)
It can adapt to PN1.6 - PN10.0MPa and above (different models have different pressure - bearing capacities). The hard - sealed structure makes it have good high - pressure resistance, suitable for medium and high - pressure pipeline systems.
(3) Applicable Temperature
It has good high - temperature resistance, and the applicable temperature can reach - 20ºC - 425ºC or higher (depending on the material and design). It can work stably in high - temperature media environments such as steam and high - temperature process fluids.
(4) Applicable Media
Suitable for various harsh media, including high - temperature steam, high - pressure fluids, strong corrosive media (such as acids, alkalis, solvents), media containing particles (such as metallurgical slag, mine tailings), etc. It is widely used in chemical, energy, metallurgy and other industries.
5. Functional and Application Attributes
(1) Functional Features
- Hard - sealed Advantages:
- Good Temperature Resistance: Can adapt to high - temperature media working conditions that conventional soft - sealed rubbers cannot withstand (such as above 200ºC), and can work stably in high - temperature environments such as steam pipelines.
- Strong Corrosion Resistance: The metal sealing surface (especially stainless steel, alloy materials) can resist the corrosion of strong corrosive media such as acids, alkalis, and solvents, and is suitable for chemical industry, etc. to transport acidic and alkaline solution pipelines.
- Wear - resistant and Impact - resistant: It can cope with media containing particles and high - velocity media (such as metallurgical slag, mine tailings slurry), and the metal sealing surface is not easily damaged by scouring.
- Operation and Control:
- Manual Operation: The handle operation is simple, and the opening and closing of the valve can be realized by rotating the handle, which is convenient for on - site operation and control.
- Flow Regulation: By controlling the rotation angle of the butterfly plate, the flow of the medium can be adjusted to meet the needs of different working conditions for flow regulation.
(2) Application Scenarios
- Chemical Industry: Used in the transportation and reaction systems of high - temperature, strong - corrosive media (such as acid - base solutions, organic solvents) to control the on - off of media.
- Energy and Power Industry: Applied to steam pipelines and cooling water systems in thermal power generation and nuclear power to adjust flow and cut off media.
- Metallurgical and Mining Industry: Used in pipelines for metallurgical slag, tailings slurry and other media containing particles and high wear to achieve wear - resistant
- High - end Manufacturing Industry: Such as the high - temperature sterilization and purified water systems in the food and pharmaceutical industries (stainless steel materials ensure hygiene and corrosion resistance).
6. Standards and Certification Attributes
(1) Executive Standards
- Domestic Standards: Generally follow GB/T 12238 - 2008 "General Valves - Flanged and Wafer - connected Butterfly Valves" and relevant enterprise standards. The structural size, performance requirements, etc. are designed and manufactured in accordance with the standards to ensure product quality and compatibility.
- International Standards: Can be adapted to international standards such as API 609 (American Standard) and BS EN 593 (European Standard) to meet the needs of export projects and international engineering applications.
(2) Certification Qualifications
- For applications involving drinking water, food, medicine and other industries, it needs to pass relevant certifications such as drinking water hygiene approval and FDA (U.S. Food and Drug Administration) certification to ensure that it meets health and safety requirements.
- For export to the European Union and other regions, CE certification is required to prove that the product meets European Union safety, environmental protection and other directives. In high - pressure, special equipment and other scenarios, it may need to obtain TSG special equipment manufacturing license (China).
7. Maintenance and Precautions
(1) Routine Maintenance
- Regularly check the sealing performance of the valve, including the sealing of the valve seat and the butterfly plate, and the sealing of the valve stem. If leakage is found, timely maintenance or replacement of sealing components should be carried out.
- Clean the surface of the valve body and components to prevent the accumulation of impurities from affecting the operation and sealing performance of the valve.
- For the transmission mechanism, regularly add lubricating oil (grease) to ensure flexible operation and reduce wear.
(2) Installation Precautions
- During installation, ensure that the pipeline and the valve are correctly aligned, and the bolts are evenly tightened to avoid uneven force on the valve body, which may affect the sealing performance and service life.
- Pay attention to the flow direction of the medium (some models have flow direction requirements). Although the hard - sealed butterfly valve has certain adaptability to the flow direction, it is recommended to install it according to the identification to ensure the best performance.
(3) Media Adaptation
- Avoid using it in media that are extremely incompatible with the valve material for a long time to prevent serious corrosion or damage to the valve. For example, if the valve body is made of ordinary cast steel, it should avoid long - term contact with strong corrosive media such as concentrated acids and alkalis.
In general, the manual flanged hard - sealed butterfly valve is a key control device for pipeline systems with harsh working conditions such as high temperature, high pressure, and strong corrosion, relying on the characteristics of metal hard sealing, and is widely used in industries such as chemical engineering, energy, and metallurgy.
Certifications
Packaging & Shipping
Company Profile
Rooted in a legacy of excellence, Tianjin Auswell Valve Co., Ltd. proudly adheres to a multitude of international standards including those from China, Germany, Britain, America, Japan, and Australia. Our versatile range spans nominal diameters from DN15 to DN3000, pressure classes from 0.60 Mpa to 6.4 Mpa, and is capable of operating within temperatures from -20°C to 150°C. With a rich palette of materials like gray cast iron, ductile iron, cast steel, stainless steel, and duplex steel, our repertoire includes precision-crafted soft-sealed butterfly valves, soft-sealed gate valves, check valves, filters, ball valves, globe valves, balance valves, and diaphragm valves.
Driven by a relentless pursuit of perfection, Tianjin Auswell Valve Co., Ltd. has significantly bolstered its management framework in recent years to meet and anticipate our clients' needs. We've proudly garnered the prestigious ISO9001 Quality Management System Certification and the esteemed British WARS Drinking Water Certification. Our product offerings, celebrated for their reliability, have made their mark across Europe, Asia, Africa, and beyond, earning widespread acclaim and trust from our clientele. Upholding our commitment to quality, we at Auswell Valve Co., Ltd. are eager to collaborate fully with peers in the valve industry. Together, we strive to elevate Chinese craftsmanship onto the global stage.
Tianjin Auswell Valve Co., Ltd. It is nestled in a storied historical town in China, a place celebrated for its rich military legacy and famed for its rice cultivation. Industrial Park, Xiaozhan Town, Jinnan District, Tianjin. Here, our company boasts comprehensive production capabilities, from innovative product design and precise mold manufacturing to advanced machining, meticulous rubber smelting, epoxy spraying, and rigorous valve assembly and testing.
With state-of-the-art processing equipment and exquisite craftsmanship, we assure that every product aligns with national or international standards, reflecting our commitment to excellence. Our dedication to superior craftsmanship ensures that we deliver only the highest quality products to our valued customers.
Rooted in a legacy of excellence, Tianjin Auswell Valve Co., Ltd. proudly adheres to a multitude of international standards including those from China, Germany, Britain, America, Japan, and Australia. Our versatile range spans nominal diameters from DN15 to DN3000, pressure classes from 0.60 Mpa to 6.4 Mpa, and is capable of operating within temperatures from -20°C to 150°C. With a rich palette of materials like gray cast iron, ductile iron, cast steel, stainless steel, and duplex steel, our repertoire includes precision-crafted soft-sealed butterfly valves, soft-sealed gate valves, check valves, filters, ball valves, globe valves, balance valves, and diaphragm valves.
Rooted in a legacy of excellence, Tianjin Auswell Valve Co., Ltd. proudly adheres to a multitude of international standards including those from China, Germany, Britain, America, Japan, and Australia. Our versatile range spans nominal diameters from DN15 to DN3000, pressure classes from 0.60 Mpa to 6.4 Mpa, and is capable of operating within temperatures from -20°C to 150°C. With a rich palette of materials like gray cast iron, ductile iron, cast steel, stainless steel, and duplex steel, our repertoire includes precision-crafted soft-sealed butterfly valves, soft-sealed gate valves, check valves, filters, ball valves, globe valves, balance valves, and diaphragm valves.
Driven by a relentless pursuit of perfection, Tianjin Auswell Valve Co., Ltd. has significantly bolstered its management framework in recent years to meet and anticipate our clients' needs. We've proudly garnered the prestigious ISO9001 Quality Management System Certification and the esteemed British WARS Drinking Water Certification. Our product offerings, celebrated for their reliability, have made their mark across Europe, Asia, Africa, and beyond, earning widespread acclaim and trust from our clientele. Upholding our commitment to quality, we at Auswell Valve Co., Ltd. are eager to collaborate fully with peers in the valve industry. Together, we strive to elevate Chinese craftsmanship onto the global stage.
After Sales Service
Our advantage :Hoswell valve company distinguishes itself with a comprehensive set of strengths. We possess in - house independent R & D capabilities, backed by state - of - the - art processing equipment. Our manufacturing processes adhere to industry - leading standards, and we operate a rigorous quality control system.
Product Quality Assurance
Quality Commitment and Inspection: Before leaving the factory, valves need to undergo strict quality inspections, such as pressure tests, sealing tests, etc. It is ensured that there are no casting defects like sand holes or air holes in the valves, and there are no bruises or scratches on the flange sealing surfaces. The markings of flow rate, direction, nominal pressure, diameter, material, etc. are clear and complete. It is promised that the valves are produced and inspected in accordance with national standards, and unqualified products will not leave the factory.
Warranty Period Service: Provide a certain period of warranty service. During the warranty period, for malfunctions caused by product quality problems, the manufacturer will repair or replace parts free of charge.
Technical Support
Pre-sales Consultation: Before customers purchase valves, provide them with professional technical consultations, including suggestions on product selection, specification parameters, material characteristics, applicable working conditions, etc., to help customers choose the most suitable valve products.
Installation Guidance: Provide installation guidance services, which can be carried out online (such as by phone, video, installation manuals, etc.) or offline (by sending technicians to the site) to ensure that the valves are installed correctly and avoid problems caused by improper installation.
Usage Training: Provide usage training for customer operators, enabling them to be familiar with the operation methods of the valves, key maintenance points, knowledge of troubleshooting common faults, etc., and improving the customers' ability to use and maintain the valves.
Supply of Maintenance Parts: Ensure the timely supply of maintenance parts. For the damage of parts outside the warranty period, provide the parts at a reasonable price (such as the cost price).
Regular Follow-up Visits: Regularly conduct follow-up visits to customers, understand the usage situation of the valves, and collect customers' feedback opinions, so as to improve the products and services.
FAQ
1) Q: Are you a manufacturer or trading company?
A: Hoswell Valve is a professional valve manufacturer with experienced R&D team.
2) Q: Do you have any agent or representative abroad?
A: Yes, we have agents in some countries, they can offer local service for you.
3) Q: What kinds of valve can you supply?
A: We can supply butterfly valve, ball valve, check valve and so on.
4) Q: Do you have any certificate for the valves?
A: Yes, we have CE, BV, ATEX, TS and so on.
5) Q: What's the delivery time?
A: If all the parts of the valve are ready in stock, the valves can be delivered within 7~10 days.
6) Q: What are the countries or regions you supply valves?
A: Hoswell valves have been supplied to USA, Europe, Australia, Singapore, South Africa and so on.
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