• Convenient downstream disassembly. The unique design allows full bidirectional operation without removing the valve or draining the pipeline when repairing or disassembling downstream pipelines.
• Easy installation with precise alignment between the valve and pipeline center; no need for long bolts, reducing the impact of bolt creep on sealing performance.
• Thickened valve body with reinforcing ribs and no hollow design; optimized to reduce stress concentration and enhance strength under harsh working conditions.
• Optimized sealing design between the valve disc and stem to prevent leakage.
• Optional actuators include handle, worm gear, pneumatic, electric, etc.
| No. | Parts | Materials |
|---|---|---|
| 1 | Handle | ABS, FRPP |
| 2 | Handle Lever | FRPP |
| 3 | Locking Plate | PPS, FRPP |
| 4 | Stem | Steel, Stainless Steel |
| 5 | Stem O-ring | EPDM, FPM |
| 6 | Seat | EPDM, FPM |
| 7 | Disc | FRPP, PPH, UPVC, CPVC, PVDF |
| 8 | Disc O-ring | EPDM, FPM |
| 9 | Disc Seal | PTFE |
| 10 | Body | FRPP, PPH, UPVC, CPVC, PVDF |
| 11 | Lug Insert | Steel, Stainless Steel |
| DN | d | D (GN/DIN) | D (ANSI) | D1 | L | n (GN/DIN) | n (ANSI) | t (GN/DIN) | t (ANSI) | Working Pressure (MPa) |
|---|---|---|---|---|---|---|---|---|---|---|
| 50 | 56 | 125 | 121 | 160 | 40 | 4 | 4 | M16 | 5/8" | 1.0 |
| 65 | 71 | 145 | 140 | 180 | 45 | 4 | 4 | M16 | 5/8" | 1.0 |
| 80 | 85 | 160 | 152 | 195 | 46 | 8 | 4* | M16 | 5/8" | 1.0 |
| 100 | 105 | 180 | 190 | 225 | 55 | 8 | 8 | M16 | 5/8" | 1.0 |
| 125 | 131 | 210 | 216 | 255 | 62 | 8 | 8 | M16 | 1/2" | 1.0 |
| 150 | 153 | 240 | 241 | 285 | 67 | 8 | 8 | M20 | 3/4" | 1.0 |
| 200 | 210 | 295 | 298 | 340 | 85 | 8 | 8 | M20 | 3/4" | 1.0 |
Step 1: Order and Design
Based on the customer’s operating conditions (pressure, temperature, and medium), determine the structural configuration, dimensional standards (e.g., ANSI/DIN), and materials (PVC, CPVC, PP, etc.) for the lug butterfly valve. Complete 3D modeling and mold design, and confirm the sealing configuration and layout of connection ports.
Step 2: Raw Material Preparation & Molding
Select high-quality engineering plastic pellets. After drying, produce key components such as the valve body and disc using injection molding to ensure dimensional stability and strength.
Step 3: Machining
Perform precision machining on the molded lug butterfly valve body, including tapping threaded holes, finishing sealing surfaces, and precision machining of shaft holes, to ensure assembly accuracy and sealing performance.
Step 4: Assembly
Assemble components such as the valve disc, valve stem, seal ring, and handle to complete the overall assembly of the lug butterfly valve, with a focus on controlling the clearance between the valve disc and the seal ring.
Step 5: Testing & Quality Assurance
The assembled lug butterfly valve undergoes seal testing, pressure testing, and opening/closing torque testing to ensure the product meets relevant standards and customer requirements.
Step 6: Finishing, Packaging and Shipment
The product is cleaned and treated with protective coatings. After labeling, it is packed in shock-resistant packaging and shipped according to order specifications.
It is primarily used in terminal pipelines, bidirectional sealing applications, and industrial piping systems that require medium- to high-pressure resistance and frequent maintenance. It is widely used in the petroleum, chemical, wastewater treatment, offshore drilling platform, food, and pharmaceutical industries to control the flow of gases, water, acids, alkalis, and oil-based media.
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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