Product Description
DN7900 Butterfly Valve Instruction Manual
1. Product Overview
- This DN7900 butterfly valve is a high - performance valve designed for large - diameter pipeline systems, mainly used in the fields of water supply and drainage, sewage treatment, and power plants. It is engineered to provide reliable flow control and isolation of media within pipeline systems. The valve combines durability, ease of operation, and excellent sealing properties.
2. Technical Specifications
- Nominal Diameter (DN): 7900mm
- Nominal Pressure (PN): [Specify the pressure rating, e.g., PN10/PN16]
- Material of Construction
- Valve Body: [Material name, such as Cast Steel ASTM A216 WCB]
- Disc: [Material name, e.g., Stainless Steel 304]
- Sealing Ring: [Material, like PTFE - lined for corrosion resistance]
- Stem: [Material, e.g., Stainless Steel 316]
- Operating Temperature Range: [Specify the range, e.g., - 20°C to 120°C]
- Applicable Media: Water, steam, gas, oil, and some corrosive fluids (depending on the material selection)
3. Structure and Working Principle
- Structure
The valve consists of a valve body, a disc, a stem, and a sealing mechanism. The disc is mounted on the stem and located within the valve body. The sealing ring is installed between the disc and the valve body to ensure a tight seal when the valve is closed.
- Working Principle
The valve operates by rotating the disc around the stem axis. When the disc rotates 90 degrees from the closed position to the open position, the fluid can flow through the valve. Conversely, when rotated back to the closed position, it blocks the flow of media.
4. Installation
- Installation Preparation
- Check the valve model, specification, and the direction of the arrow on the valve body to ensure it is consistent with the pipeline requirements.
- Clean the pipeline thoroughly to remove any debris, dirt, or welding slag.
- Installation Steps
- Place the valve in the pipeline according to the specified orientation. Due to the large size and weight of the DN7900 butterfly valve, appropriate lifting equipment and tools are required for installation.
- Align the valve flanges with the pipeline flanges and install the bolts. Tighten the bolts evenly in a criss - cross pattern to ensure a proper seal.
- If the valve is equipped with an actuator (such as an electric or pneumatic actuator), install it according to the actuator's installation instructions.
5. Operation and Maintenance
- Operation
- Manual operation: Use the handwheel or lever to rotate the disc. Clockwise rotation usually closes the valve, and counter - clockwise rotation opens it. For a DN7900 butterfly valve, manual operation may be very labor - intensive, so it is often equipped with an actuator for operation.
- Actuator - controlled operation: For valves with actuators, follow the control system's operating instructions to open and close the valve.
- Do not exceed the rated pressure and temperature during operation.
- Maintenance
- Regularly check the valve for any signs of leakage, especially around the sealing surfaces and the stem packing.
- Lubricate the stem and other moving parts as per the recommended lubrication schedule to ensure smooth operation.
- Inspect the valve body and disc for any signs of corrosion or wear. Replace any damaged parts promptly. Due to the large size of the DN7900 butterfly valve, the replacement of parts may require professional equipment and technicians.
6. Troubleshooting
| Problem |
Possible Cause |
Solution |
| Leakage at the valve body |
Damaged sealing ring |
Replace the sealing ring |
| Difficulty in operating the valve |
Lack of lubrication; Mechanical failure in the actuator or transmission mechanism |
Lubricate the moving parts; Check and repair the actuator or transmission mechanism |
| Stem leakage |
Worn - out stem packing |
Replace the stem packing |
7. Storage
- Store the valve in a dry, clean environment.
- Protect the valve from direct sunlight, rain, and other adverse weather conditions.
- If the valve is to be stored for an extended period, it is recommended to coat the exposed metal parts with a rust - preventive agent.
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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