Product Description
I. Product Positioning and Core Value
Flanged soft - seated butterfly valves feature a flange connection + elastic sealing pair design, tailored for medium - low pressure (≤2.5MPa) and clean/slightly corrosive media systems. They integrate shut - off (zero leakage) and flow regulation capabilities. Leveraging centric (optimal flow resistance) or eccentric (extended seal life) structures, along with multiple actuation modes (manual/gearbox/electric/pneumatic/hydraulic), they serve diverse sectors including municipal, building, environmental protection, and light industry, addressing the needs for "efficient flow, reliable sealing, and flexible control".
II. Core Structure and Design Logic
1. Sealing System
- Soft Sealing Pair: Valve seats utilize elastic materials like NBR (oil - resistant), EPDM (water - resistant), and PTFE (temperature/corrosion - resistant), forming a squeeze seal with metal discs (stainless steel/bronze, etc.). Leakage rates meet GB/T 13927 Class A (zero leakage or ≤0.1% of rated flow).
- Structural Optimization:
- Centric Design: The disc center aligns with the flow path center, minimizing flow resistance (Kv outperforms gate valves by over 30%), ideal for high - flow and regulation scenarios.
- Double - Eccentric Design: The disc disengages from the seat before sealing during rotation, reducing friction and prolonging seal life (suited for frequent on - off operations).
2. Connection and Transmission
- Flange Connection: Complies with GB/T 9113 (domestic) or ANSI B16.5 (international). Symmetrically distributed bolt holes enable easy installation, matching rigid piping systems.
- Shaft - Disc Interface: The shaft (stainless steel/duplex steel) connects rigidly to the disc (via keyway or interference fit), ensuring no transmission backlash and precise 90° on - off control.
III. Material System and Application Scenarios
(Analyzing material performance and use cases based on key component materials)
| Component |
Material Options |
Performance Highlights |
Application Scenarios |
| Body |
Ductile Iron (GGG40), Carbon Steel (WCB), Stainless Steel (316L) |
Cast iron: cost - effective, impact - resistant; Carbon steel: high pressure - bearing; Stainless steel: corrosion - resistant |
Municipal (cast iron); Industrial (carbon steel/stainless steel) |
| Seat |
NBR, EPDM, PTFE |
NBR: oil - resistant; EPDM: water - resistant; PTFE: resistant to 200ºC and corrosion |
Oil (NBR); Sewage (EPDM); Chemical (PTFE) |
| Disc |
Stainless Steel (316L), Duplex Steel (2507), Bronze |
Stainless steel: corrosion - resistant; Duplex steel: highly corrosion - resistant; Bronze: seawater - resistant |
Chemical (316L); Marine (duplex steel); Shipbuilding (bronze) |
| Shaft |
SS431, Monel |
SS431: torsion - resistant; Monel: acid - and alkali - resistant |
High - temperature (SS431); Strongly corrosive (Monel) |
IV. Dimensions and Standard Specifications
1. Nominal Diameter (DN)
Range: DN50 ~ DN2000 (mainstream: DN50~DN1200; customization required for DN > 1200 to verify structural strength).
2. Face - to - Face Length (L)
- Domestic Standard (GB/T 12221): For PN1.6, L = 108mm (DN100), L = 216mm (DN300). Higher PN increases L by 5-20mm to thicken the body.
- International Standard (API 609): For Class 150, L = 140mm (DN100, 4"), more compact than GB, compatible with ANSI flange systems.
3. Flange Interface (Example: PN1.6, DN100)
- GB/T 9113: Flange OD = 215mm, PCD = 170mm, 8 holes (φ18mm), M16 bolts.
- ANSI B16.5: Flange OD = 229mm, PCD = 191mm, 8 holes (φ19mm), 5/8" bolts (American standard thread).
V. Performance Parameters and Boundaries
| Parameter |
Typical Value |
Constraints |
| Nominal Pressure (PN) |
PN0.6, 1.0, 1.6, 2.5MPa (soft - seal limit ≤2.5MPa) |
Upgrade to hard - seal for overpressure |
| Operating Temperature |
-40ºC~200ºC (varies by seal: NBR(-20~80ºC), PTFE(-100~200ºC)) |
Use PTFE or metal seals for high temperatures |
| Leakage Class |
Zero leakage (GB/T 13927 Class A) |
Clean media (no particles to scratch seals) |
| Opening/Closing Torque |
Manual: ≤150N·m (DN100); Gearbox - reduced: ≤50N·m |
Eccentric structures reduce torque by 30%+ |
VI. Actuation Modes and Scenario Matching
| Actuation Type |
Core Features |
Application Scenarios |
| Hand Lever |
Simple structure, second - level on - off, no extra space needed |
Small diameters (DN≤100), low - frequency use |
| Gearbox Manual |
Worm - gear reduction (≥50% effort saving), dial for precise regulation |
Large diameters (DN≥150), manual fine - tuning |
| Electric Actuation |
Remote control, stepless regulation, PLC/DCS - compatible |
Automated production lines, unattended operations |
| Pneumatic Actuation |
Millisecond response, explosion - proof (with pneumatic actuators) |
Chemical explosion - proof zones, quick shut - offs |
VII. Application Scenarios and Limitations
Advantage Scenarios:
- Municipal: Water supply/drainage networks (large flow, centric design for low resistance), sewage treatment (soft seals prevent leakage).
- Building: HVAC systems (air - conditioning water regulation, electric actuation for precise temperature control), fire protection (gearbox actuation for quick on - off).
- Environmental Protection: Desulfurization/denitrification (PTFE seals resist weak acids/bases), waste gas treatment (EPDM seals resist moisture).
- Light Industry: Food/beverage (sanitary EPDM seals), pharmaceuticals (stainless steel bodies prevent contamination).
Limitations:
- Media: Particulate (e.g., mortar) or abrasive (e.g., ore pulp) media scratch soft seals; strongly corrosive media (e.g., concentrated acid) require full stainless steel + PTFE seals.
- Conditions: Soft seals age/fail under high temperatures (>200ºC) or high pressures (>2.5MPa); switch to hard - seal butterfly valves in such cases.
VIII. Installation and Maintenance Guidelines
-
Installation Tips:
- Verify flange standards (GB/ANSI are incompatible); clean pipeline debris (to avoid disc jamming).
- Tighten bolts symmetrically in stages (uniform torque to prevent body deformation); reserve actuation space (gearboxes need ≥200mm rotation radius).
-
Maintenance Recommendations:
- Inspect the sealing surface quarterly (replace seals promptly if scratched); clean valve cavity deposits.
- Lubricate shafts regularly with food - grade grease (food applications) or graphite grease (industrial use); replace gearbox oil annually.
Selection Note: Clearly define media (temperature, corrosiveness, particle content), pressure, and control requirements (manual/automated). Prioritize manufacturer - provided custom dimension drawings + material certificates (e.g., 3.1 certification) to ensure system compatibility.
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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