⚙️ Decoding Fluid Control: The Ultimate Butterfly Valve Guide
Selecting the perfect butterfly valve is a critical engineering decision that dictates the efficiency, safety, and longevity of your entire piping system. Whether you are managing an urban water supply, a complex chemical processing plant, or a high-demand petroleum facility, the right valve prevents catastrophic leaks, minimizes pressure drops, and significantly reduces maintenance downtime.
At Tianjin Guoji Valve Co., Ltd. (TGV), we have spent over a decade mastering the art and science of valve manufacturing. In this comprehensive guide, we will walk you through the essential parameters you must evaluate before procuring a butterfly valve for your next major project.
1. Analyze Operating Conditions
The first step is understanding your system's parameters. Consider the Working Pressure (e.g., PN10, PN16, ANSI 150) and Working Temperature. For instance, resilient seated valves (EPDM/NBR) are excellent for water and low temperatures (-10℃ to 120℃), while metal-seated eccentric valves are mandatory for high-temperature steam or abrasive media.
2. Media Compatibility
What is flowing through your pipes? For corrosive chemicals, a PTFE Coated Butterfly Valve or a stainless steel (CF8M) disc is non-negotiable. For standard potable water or wastewater, ductile iron (GGG50) bodies with Nylon/Epoxy coated discs offer excellent durability and cost-effectiveness.
3. Connection Types
Choose the right body style for installation. Wafer types are lightweight and sandwiched between flanges. Lug types feature threaded inserts allowing for dead-end service. Flanged valves (Concentric or Double/Triple Eccentric) are robust solutions for large-diameter, high-pressure applications.
🏭 Why Partner with Tianjin Guoji Valve Co., Ltd. (TGV)?
Years Export Experience
Skilled Employees
Certified Quality
Customer First Approach
PERSISTENT PURSUIT OF QUALITY AND PERFORMANCE
We aim to provide best services to all valuable customers with quality products and technical expertise.
Tianjin Guoji Valve Co., Ltd. is a professional valves manufacturer located in Tianjin China, specialized on butterfly valves, gate valves, check valves, ball valves, globe valves, strainers, expansion joints, etc. We are also a professional exporter with 10+ years of experience. We focus on R&D and aim to provide best services to valuable customers. Our plant is fully equipped with manufacturing processing and testing equipments, strong technical force, and over 200 employees including skilled assembly-line workers and experienced technical staffs in the valve field. Now our company has passed the ISO9001: 2008 quality management system certification and got CE certification.
Our products are widely used in petroleum, chemical, urban water supply and drainage, paper, electronics, shipbuilding, medicine, construction, food, and other industries. Tianjin Guoji Valve Co., Ltd enjoys a good fame among wide customers by virtue of its good product quality and perfect service system. Now our products sell well in Europe and America, Southeast Asia, the Middle East, Australia, North Africa, and many countries and regions.
Factory Add.: No.009 Xinfa Rd., Shuangqiaohe Industrial Park, Jinnan District, Tianjin, China.
Office Add.: Room 1608-09 Zheshang Plaza, Xiangluowan CBD, Binhai New Area, Tianjin, China.
Tel.: +86-22-6535 8723
Fax.: +86-22-6622 4149
🌐 TGV Core Product Series
Explore our comprehensive range of high-performance valves designed for demanding industrial applications.
Wafer Butterfly Valve
U-Type Butterfly Valve
Non-Rising Stem Gate Valve
Rising Stem Gate Valve
Dual Plate Wafer Check Valve
Lug Butterfly Valve (Through Shaft)
Globe Valve
Rubber Expansion Joint
Y-Strainer
🔬 Concentric Butterfly Valve Specifications
Butterfly valve is used as a shutting-off or throttling unit for petroleum processing, chemicals, food, medicine, textile, paper making, hydroelectricity engineering as well as light industry, etc. It can be installed in any selected position.
Design Features
- High Precision Disc: Reach the requirement of bubble-tight, small start and stop torque, longer usage life of seat.
- Stem Seal: Stem is not easy to be distorted, eliminating possible leakage in stem.
- Integral Stem Design: Ensures dependable and positive disc control.
- Backed Seat: Non-collapsible, stretch-resistant and leakage proof.
- Bushing: Reduce driving torque, support stem, and effectively separate it with valve body.
Technical Parameters
- Working Pressure: PN16 (200PSI)
- Type: Wafer / Lug / U-Type
- Face to Face: API609, BS5155, DIN3202, ISO5752
- Flange: DIN, BS, UNI, ISO, ANSI, AS, JIS
- Mounting Flange: ISO5211
Standard Materials of Main Parts
| NO. | PART | MATERIAL |
|---|---|---|
| 1 | Body | Cast Iron, Ductile Iron, Carbon Steel, Stainless Steel |
| 2 | Seat | NBR, EPDM, Viton, Neoprene, Hypalon, Silicon PTFE |
| 3 | Shaft | Stainless Steel 416, 316, 304 |
| 4 | Disc | Ductile Iron +Ni, CF8, CF8M, Bronze |
| 5 | Pin | Stainless Steel |
| 6 | Bushing | PTFE, Bronze |
| 7 | O Ring | NBR, EPDM |
⚡ Advanced Valve Solutions: Double & Triple Eccentric
For applications requiring zero leakage under high pressure and extreme temperatures, our Double Eccentric and Triple Eccentric Flanged Butterfly Valves provide the ultimate solution. The eccentric design minimizes friction between the disc and seat, drastically reducing wear and extending the valve's operational lifespan.
Double Eccentric Flanged Butterfly Valve - Materials
| NO. | PART | MATERIAL |
|---|---|---|
| 1 | Body | Ductile Iron / Carbon Steel / Stainless Steel |
| 2 | Disc Sealing Ring | EPDM / NBR (With WRAS approval options) |
| 3 | Top/Bottom Shaft | Stainless Steel 420 |
| 4 | Disc | Ductile Iron / Carbon Steel / Stainless Steel |
| 5 | Actuator | Worm gear Actuator |
🛡️ Gate Valves & Check Valves
TGV manufactures a robust line of Gate Valves (Rising and Non-Rising Stem, Metal and Resilient Seated) and Check Valves (Dual Plate Wafer, Swing, Silent). Designed to conform to ANSI, BS, DIN, and AWWA standards, these valves guarantee reliable flow control and backflow prevention in water works, HVAC, and industrial pipelines.
Gate Valve Features
Oval bore design for good compression resistance. Embedded type seat for safety. Soft graphite packing for long service life. Low open torque, turning freely.
Check Valve Features
Small size, light weight. Dual plates with torsion springs close quickly to eliminate water hammer. Tightly sealed with zero leakage.
Gate Valve (Resilient Seated) - Materials
| NO. | PART | MATERIAL | STANDARD |
|---|---|---|---|
| 1 | Body & Bonnet | Ductile Iron | ASTM A536 / BS2789 |
| 2 | Resilient Wedge | Ductile Iron + EPDM | ASTM A536 + EPDM |
| 3 | Stem | Stainless Steel | SS410 / SS420 |
| 4 | O-Ring / Gasket | EPDM / PTFE | Commercial |
| 5 | Handwheel | Ductile Iron / Cast Iron | ASTM A536 |
🔗 Pipeline Accessories: Y-Strainers & Expansion Joints
To complete your piping system, TGV offers premium Y-Strainers to filter out debris and protect expensive equipment, alongside Rubber Expansion Joints and Dismantling Joints to absorb vibration, compensate for thermal expansion, and facilitate easy valve installation and removal.
Y-Strainer
Stainless steel screen (304/316) housed in Cast/Ductile Iron body. Available in ANSI and DIN standards. Working pressure up to 1.6MPa.
Rubber Expansion Joint
NBR/EPDM liner with Nylon Cord Fabric frame and Steel Wire pressurized ring. Handles axial and lateral displacement effectively.
Dismantling Joint
Constructed from QT400-15/Q235A steel. Simplifies the installation and replacement of flanged valves in complex pipe networks.
