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Product Description
Manual Wafer-type Soft-seal Butterfly Valve - Product Details
I. Product Overview
The manual wafer-type soft-seal butterfly valve (typical model: D71X series) serves as a core control valve for media shut-off and flow regulation in industrial piping systems. It operates via a lever or worm gear to rotate the butterfly disc 90°, enabling precise fluid control. Characterized by a wafer-type connection (clamped directly between pipeline flanges) and a soft-seal structure (rubber/PTFE sealing pair), it is well-suited for clean media such as water, air, oil, and mildly corrosive fluids. Widely applied in industries including water treatment, power generation, chemical processing, water supply/drainage, and food & pharmaceuticals for both manual and automated fluid management.
II. Core Structure & Features
1. Sealing & Structural Design
- Soft-seal Technology: Utilizes a stainless steel + NBR (Nitrile Butadiene Rubber)/fluororubber/PTFE sealing pair. Achieves near-zero leakage under low pressure (compliant with GB/T 13927-92) through rubber elastic deformation. Seals can be mounted on the valve body or disc to adapt to media conditions (e.g., particle-laden vs. pure fluids).
- Eccentric Optimization: Optional double-eccentric design (enhances sealing with wear compensation) or center-line non-eccentric design (simplified structure, reliable sealing) ensures long-term operational stability.
2. Installation & Operation Advantages
- Bidirectional Sealing & Flexibility: No restrictions on flow direction or installation space; can be installed in any orientation. The wafer-type connection eliminates the need for additional flanges, saving space and reducing installation costs.
- Efficient Actuation: Features 90° fast disc rotation with low operating torque (lever/worm gear for ease of use). Withstands tens of thousands of cycles, ensuring a long service life.
3. Fluid Control & Adaptability
- Disc Design: A frame-structured disc provides high strength, a large flow area, and low flow resistance. Linear flow characteristics enable superior regulation accuracy compared to gate or globe valves.
- Multi-media Compatibility: Swap sealing seat materials (NBR/fluororubber/PTFE) to suit media such as water, air, natural gas, oil, and mildly corrosive fluids (e.g., acid/alkali solutions). Anti-rust paint extends the valve body's service life.
III. Key Technical Parameters (Typical Range; Customizable by Manufacturer)
| Parameter |
Details |
Notes |
| Nominal Diameter (DN) |
50mm-2000mm (commonly 50mm-1600mm) |
Matches pipeline size |
| Nominal Pressure (PN) |
0.6MPa, 1.0MPa, 1.6MPa |
System pressure ≤ PN |
| Test Pressure |
- Seal Test: 0.66/1.1/1.76MPa (matching PN)
- Shell Test: 0.9/1.5/2.4MPa (matching PN) |
Verifies sealing and pressure resistance |
| Operating Temperature |
- NBR: -40ºC-90ºC
- Fluororubber: -20ºC-200ºC |
Select by seal material |
| Applicable Media |
Water, air, natural gas, oil, mildly corrosive fluids |
For strong corrosion, customize with stainless steel/PTFE lining |
| Leakage Rate |
Complies with GB/T 13927-92 (near-zero for soft-seal) |
Advantage in low-pressure clean services |
| Actuation Method |
Manual (lever/worm gear); extendable to electric/pneumatic |
Manual suits simple services; electric/pneumatic requires customization |
IV. Main Component Materials
| Component |
Material Options |
Application |
| Valve Body |
- Carbon Steel (WCB)
- Ductile Iron (QT450-10)
- Gray Iron (HT200/HT250) |
Standard/low-pressure services |
| Disc |
Same as valve body (WCB, QT450-10, etc.) |
Ensures structural strength and sealing compatibility |
| Valve Stem |
2Cr13 Stainless Steel |
Corrosion and wear resistance |
| Sealing Ring |
NBR (standard), Fluororubber (high temp/corrosion) |
Select by media temp/corrosivity |
| Packing |
Flexible Graphite |
Seals stem; resistant to temp/pressure |
V. Compliance Standards
- Manufacturing Standard: GB/T 122387-89 (ensures structural/performance consistency)
- Flange Standard: GB9113-2000, GB17241.6-1998 (compatible with pipeline flanges)
- Face-to-Face Dimension: GB12221-89 (installation size matches industry pipelines)
- Inspection Standard: GB/T 13927-92 (basis for seal performance and pressure tests)
VI. Typical Application Scenarios
- Industrial Systems: Water supply/drainage in water treatment plants, power plants, and steel mills (shut-off/regulation of clean or sewage water); transfer of mildly corrosive fluids (e.g., acid/alkali solutions, oil) in chemical and paper industries.
- Civil & Environmental Protection: Water supply/drainage in high-rise buildings; sludge/wastewater pipelines in sewage treatment plants; sanitary pipelines in food/pharmaceutical industries (relies on soft-seal "near-zero leakage" and clean materials).
- General Fluid Control: On-off regulation of air/natural gas pipelines; flow control of low-pressure clean fluids (e.g., lubricating oil, coolants).
VII. Selection Recommendations
-
Media Priority:
- Mildly corrosive, normal temperature (-40ºC-90ºC): NBR seal + ductile iron/carbon steel body.
- High temperature (-20ºC-200ºC) or strong corrosion: Fluororubber seal + stainless steel body.
-
Pressure & Diameter: Select PN with a 1.2× safety margin (system pressure ≤ PN); strictly match DN to pipeline size.
-
Installation & Operation:
- Space-constrained: Wafer-type (priority).
- Frequent manual operation: Lever handle (small DN ≤ 200mm).
- Large DN (> 300mm) or labor-saving: Worm gear actuation.
-
Special Requirements:
- Bidirectional flow, frequent cycling: Double-eccentric design (excellent wear compensation).
- Sanitary (food/pharmaceutical): Stainless steel body + food-grade rubber seal (no residue, easy cleaning).
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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