| Materials | Medium Temperature (°C) |
|---|---|
| RPP (Reinforced Polypropylene) | -14°C ~ +90°C |
| UPVC (Unplasticized Polyvinyl Chloride) | -10°C ~ +70°C |
| PVDF (Polyvinylidene Fluoride) | -40°C ~ +140°C |
| CPVC (Chlorinated Polyvinyl Chloride) | -40°C ~ +95°C |
• Sealing performance is improved due to the specially designed seat.
• Thickened valve body with reinforcing ribs and no hollow design; optimized to reduce stress concentration and enhance strength under harsh conditions.
• Spherical disc design provides better durability and improved Cv value.
| No. | Parts | Materials |
|---|---|---|
| 1 | Body | FRPP, PPH, UPVC, CPVC, PVDF |
| 2 | Seat | EPDM, FPM |
| 3 | Locking Plate | PPS, FRPP |
| 4 | Handle | ABS, FRPP |
| 5 | Stem | Steel, Stainless Steel |
| 6 | Disc | FRPP, PPH, UPVC, CPVC, PVDF |
| 7 | O-ring | EPDM, FPM |
| DN | d | D (HG/DIN) | D (JIS) | D (ANSI) | D1 | L | n (HG/DIN) | n (JIS) | n (ANSI) | Working Pressure (MPa) |
|---|---|---|---|---|---|---|---|---|---|---|
| 25 | 35 | 85 | 90 | 79 | 125 | 37 | 4 | 4 | 4 | 1.0 |
| 32 | 35 | 100 | 100 | 89 | 125 | 37 | 4 | 4 | 4 | 1.0 |
| 40 | 47 | 110 | 105 | 98 | 145 | 38 | 4 | 4 | 4 | 1.0 |
| 50 | 56 | 125 | 120 | 121 | 160 | 40 | 4 | 4 | 4 | 1.0 |
| 65 | 71 | 145 | 140 | 140 | 180 | 45 | 4 | 4 | 4 | 1.0 |
| 80 | 85 | 160 | 150 | 152 | 195 | 46 | 8 | 8 | 4* | 1.0 |
| 100 | 105 | 180 | 175 | 190 | 225 | 55 | 8 | 8 | 8 | 1.0 |
| 125 | 131 | 210 | 210 | 216 | 255 | 62 | 8 | 8 | 8 | 0.6# |
| 150 | 153 | 240 | 240 | 241 | 285 | 67 | 8 | 8 | 8 | 0.6# |
| 200 | 210 | 295 | 290 | 298 | 340 | 85 | 8 | 12* | 8 | 0.6# |
| No. | Parts | Materials |
|---|---|---|
| 1 | Handle | Alloy Material |
| 2 | Locating Rod | Alloy Material |
| 3 | Positioning Plate | Alloy Material |
| 4 | Nut Cup | FRPP |
| 5 | Body | FRPP, PVDF, CPVC, UPVC, PPH |
| 6 | Valve Plate | FRPP, PVDF, CPVC, UPVC, PPH |
| 7 | Rubber Seal | EPDM, FPM |
| 8 | Stem | Steel, Stainless Steel |
| 9 | Pin | Alloy Material |
| DN (mm) | Flange Outer Diameter D1 | Bolt Circle D2 (GB) | Bolt Circle D2 (JIS) | Bolt Circle D2 (ANSI) | Inner Diameter D3 | L | n-Ø (GB) | n-Ø (JIS) | n-Ø (ANSI) |
|---|---|---|---|---|---|---|---|---|---|
| 40 (1 1/2") | 148 | 110 | 105 | 3.88 | 45 | 39 | 4-Ø19×25 | 4-Ø19×25 | 4-Ø19×25 |
| 50 (2") | 162 | 125 | 120 | 4.74 | 50 | 40 | 4-Ø19×26.5 | 4-Ø19×26.5 | 4-Ø19×26.5 |
| 65 (2 1/2") | 180 | 145 | 140 | 5.49 | 64 | 42 | 4-Ø19×26.5 | 4-Ø19×26.5 | 4-Ø19×26.5 |
| 80 (3") | 198 | 160 | 150 | 6.00 | 77 | 42 | 8-Ø19×25 | 8-Ø19×24 | 8-Ø19×25 |
| 100 (4") | 225 | 180 | 175 | 7.50 | 96 | 52 | 8-Ø18×32 | 8-Ø19×32 | 8-Ø19×32 |
| 125 (5") | 255 | 210 | 210 | 8.50 | 120 | 61 | 8-Ø23×33 | 8-Ø23×33 | 8-Ø23×33 |
| 150 (6") | 285 | 240 | 240 | 9.51 | 145 | 71 | 8-Ø23×34 | 8-Ø23×34 | 8-Ø23×34 |
| 200 (8") | 340 | 295 | 290 | 11.75 | 196.5 | 81 | 8-Ø23×33.5 | 12-Ø23×27 | 8-Ø23×33.5 |
Step 1: Order and Design
Confirm the specifications of the handle-type butterfly valve based on customer requirements (dimensions, pressure rating, connection standards, materials such as PVC, CPVC, PP, etc.). Complete the structural design, mold design, and technical drawing review to ensure that the valve body, disc, and handle are structurally compatible.
Step 2: Raw Material Preparation & Molding
Select standard-compliant plastic raw materials (such as PVC or PP). After drying, manufacture the main components of the handle-type butterfly valve—including the valve body, valve disc, handle, and seal seat—using injection molding to ensure dimensional stability and surface quality.
Step 3: Machining
Perform necessary machining on the molded handle-type butterfly valve components, such as finishing the sealing surfaces, reaming holes, and threading, to ensure assembly precision and sealing performance.
Step 4: Assembly
Assemble the handle-type butterfly valve components according to the assembly process, including installing the valve disc, embedding the sealing ring, connecting the valve stem, and securing the handle, to ensure smooth operation and flexible opening and closing.
Step 5: Testing & Quality Assurance
The handle-type butterfly valve undergoes rigorous testing, including seal integrity tests, pressure tests, and operating torque tests, along with visual and dimensional inspections, to ensure the product meets quality standards.
Step 6: Finishing, Packaging and Shipment
The product is cleaned and visually inspected, labeled, and packaged as required (e.g., in cartons or on pallets). Finally, it is prepared for warehousing and shipment to ensure safe and reliable transportation.
This butterfly valve is widely used in various gas pipelines within the sulfuric acid and sulfur-based acid production industries, such as for flow regulation and shutoff in critical components like blowers, converters, and preheaters. It features excellent sealing performance, high-temperature resistance, corrosion resistance, flexible operation, and safety and reliability, making it the industry’s preferred choice. It is also suitable for regulating and controlling pipelines carrying various gas and liquid media (such as SO₂, steam, air, and acid-base solutions) in fields including chemical engineering, petrochemicals, metallurgy, pharmaceuticals, and food processing.
These valves are widely used in:
Oil and Gas
Chemical Processing
Power Plants
Water Treatment
Metallurgy and Mining
Agriculture and Irrigation
Superior Quality
Our valves are produced from high-grade materials and subjected to strict quality inspections to guarantee dependable performance in challenging industrial environments.
Advanced Technology
With cutting-edge CNC machining systems and high-precision manufacturing equipment, we ensure valves are made with outstanding accuracy and uniformity.
Competitive Pricing
By streamlining production processes and sourcing materials in bulk, we provide premium-quality valves at competitive prices while maintaining excellent standards.
Expert Support
Our skilled technical team offers full support from product selection through after-sales service, helping ensure the best valve performance for your application.
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