Wholesale Replaceable metal seat eccentric lug type butterfly valve Supplier, Factories
Product Description
Product Overview & Specifications
| Valve Type: | Lug butterfly valve | Structure: | Eccentric |
| Standard: | API/EN/JIS | Workmanship: | Investment casting |
| Sealing direction: | Bidirectional | Sealing grade: | Zero leakage |
| Temperature: | -190°C < T < 700°C | Operation: | Handle |
Characteristics
The renewable seat triple eccentric lug butterfly valve adopts replaceable seat and metal-to-metal hard seal structure. With friction-free operation and self-tightening bidirectional zero leakage, it resists high temperature and particle erosion. The special lug thread design supports single-side blind and single-side connection, ideal for pump ports and branch pipelines. The on-site replaceable seat greatly reduces long-term maintenance costs.
Key Advantages
1. Low maintenance cost, no need to replace the entire valve
There is only the seat needs replacement instead of the whole triple offset butterfly valve. On-site maintenance without pipe disassembly greatly reduces downtime and spare part costs.
2. Lug connection is flexibly installed, adapting to the pump port branch pipeline
This replaceable butterfly valve with unique lug thread structure supports single-side blind closure and unilateral connection. Perfect for pump inlet/outlet and branch pipelines with strong tension resistance and easy installation.
3. Heavy-duty and durable, with wide adaptability to working conditions
All-metal hard seal adapts to high temperature, flue gas, dusty and abrasive media. The friction-free triple eccentric design of this metal to metal butterfly valve ensures stable zero leakage under large pressure difference.
Material Specifications
| Part name | Material |
| Valve body | WCB, QT450-10, Q235, Alloy steel, stainless steel, etc. |
| Valve stem | Alloy steel, stainless steel |
| Seal ring | Stainless steel composite multi-level |
| Packing | Flexible graphite or stuffing |
| Valve seat | Stainless steel, cobalt based hard alloy |
| Valve stem | Stainless steel |
Dimensions & Parameters
| PN (MPa) | DN (mm) | L | D | D1 | Z- φ d | H | H0 | A | B |
| 1.6 | 150 | 70 | 211 | 240 | 8- φ22 | 385 | 230 | 66 | 150 |
| 200 | 71 | 266 | 295 | 12- φ22 | 471 | 297 | 85 | 170 | |
| 250 | 76 | 319 | 355 | 12- φ26 | 533 | 327 | 85 | 170 | |
| 300 | 83 | 370 | 410 | 12- φ26 | 606 | 364 | 106 | 205 | |
| 350 | 92 | 429 | 470 | 16- φ26 | 694 | 404 | 106 | 205 | |
| 400 | 102 | 480 | 525 | 16- φ30 | 757 | 444 | 130 | 240 | |
| 450 | 114 | 548 | 585 | 20- φ30 | 814 | 472 | 155 | 240 | |
| 500 | 127 | 609 | 650 | 20- φ33 | 902 | 522 | 169 | 306 | |
| 600 | 154 | 720 | 770 | 20- φ36 | 1048 | 590 | 198 | 324 | |
| 700 | 165 | 794 | 840 | 24- φ30 | 1277 | 810 | 220 | 335 | |
| 800 | 190 | 901 | 950 | 24- φ39 | 1385 | 844 | 241 | 356 | |
| 900 | 203 | 1001 | 1050 | 28- φ39 | 1490 | 890 | 241 | 356 | |
| 1000 | 216 | 1112 | 1170 | 28- φ42 | 1620 | 950 | 241 | 356 | |
| 1200 | 254 | 1328 | 1390 | 32- φ48 | 2191 | 1340 | 35 | 785 | |
| 1400 | 390 | 1530 | 1590 | 36- φ48 | 2326 | 1450 | 35 | 785 | |
| 1600 | 440 | 1750 | 1820 | 40- φ55 | 2685 | 1590 | 35 | 785 | |
| 1800 | 490 | 1950 | 2020 | 44- φ55 | 2924 | 1710 | 60 | 865 | |
| 2000 | 540 | 2150 | 2230 | 48- φ60 | 3186 | 1854 | 60 | 865 |
Application Scenarios
The replaceable lug type triple offset butterfly valve widely used for pump inlet and outlet pipelines, pipeline branch and bypass systems, power plant desulfurization, heating steam piping, metallurgical flue gas, chemical abrasive media and industrial wastewater pipelines.
Packaging & Shipping
Standard export wooden case packaging
Frequently Asked Questions (FAQ)
Q1: What makes a renewable seat triple eccentric butterfly valve unique?
It features a replaceable metal-to-metal seat combined with a triple offset geometry, eliminating friction during operation and allowing on-site maintenance without replacing the full valve assembly.
Q2: Can the valve seat be replaced on-site without removing the pipe?
Yes, the renewable seat design allows fast on-site seat replacement without requiring pipeline disassembly, reducing downtime and maintenance costs significantly.
Q3: What working temperatures can this valve withstand?
This lug butterfly valve is built to handle extreme working temperature ranges from -190°C up to 700°C (-190°C < T < 700°C).
Q4: Does this butterfly valve support bidirectional zero leakage?
Yes, the metal-to-metal hard seal structure ensures bidirectional zero leakage tight shut-off even under high pressure differentials and particle erosion.
Q5: What are the main industry applications for this lug connection valve?
It is widely implemented in pump inlet/outlet pipelines, power plant desulfurization, heating steam lines, chemical abrasive media handling, and metallurgical flue gas systems.
Q6: What standards and manufacturing processes are used?
The valves are produced using precision investment casting techniques and conform to international design standards including API, EN, and JIS.
