Audited Supplier
Application and Features
The expansion valve is suitable for applications in food, pharmaceuticals, chemicals, petroleum, power, textiles, papermaking, and other industries, where it serves to regulate flow and shut off media in pipelines for water supply, drainage, and gas pipelines with a temperature ≤ 425°C and nominal pressure ≤ 1.6MPa. It also has the function of compensating for pipeline contraction and expansion due to temperature changes.
Features
- The design is innovative, reasonable, with a unique structure, lightweight, easy to operate, and quick to open and close.
- In addition to regulating flow and shutting off media, the expansion butterfly valve compensates for thermal expansion and contraction caused by temperature differences in pipelines, while also providing convenience for valve installation, replacement, and maintenance.
- The sealing components are adjustable and replaceable, ensuring reliable sealing performance.
| Part Name | Material |
| Body | Ductile Iron, Carbon Steel, Stainless Steel |
| Disc | Ductile Iron, Carbon Steel, Alloy Steel, Stainless Steel |
| Seal Ring | Rubber, PTFE, Stainless Steel |
| Stem | 2Cr13 Stainless Steel |
| Expansion Pipe | Carbon Steel, Stainless Steel |
| Packing | Flexible Graphite |
Adopted Standards
| Standard Type | Standard Number/Description |
| Design Standard | GB/T12238 |
| Flange Connection Size | HG/T20592 |
| Pressure Testing | GB/T26480 |
DN Dimensions Table
| Nominal Diameter DN | D | D1 | D2 | Lmax | Lm in | Design Length | H1 | H2 | n-Φd |
| 100 | 158 | 180 | 220 | 226 | 184 | 205 | 110 | 170 | 8-Φ18 |
| 125 | 184 | 210 | 250 | 232 | 190 | 211 | 123 | 182 | 8-Φ18 |
| 150 | 212 | 240 | 285 | 240 | 195 | 218 | 140 | 210 | 8-Φ18 |
| 200 | 268 | 295 | 340 | 265 | 215 | 240 | 170 | 238 | 8-Φ22 |
| 250 | 320 | 350 | 395 | 285 | 235 | 260 | 195 | 270 | 12-Φ22 |
| 300 | 370 | 400 | 445 | 300 | 250 | 275 | 222 | 300 | 12-Φ22 |
| 350 | 430 | 460 | 505 | 320 | 270 | 295 | 252 | 330 | 16-Φ22 |
| 400 | 482 | 515 | 565 | 343 | 283 | 313 | 285 | 368 | 16-Φ26 |
| 450 | 532 | 565 | 615 | 358 | 298 | 328 | 310 | 402 | 20-Φ26 |
| 500 | 585 | 620 | 670 | 378 | 318 | 348 | 337 | 438 | 20-Φ26 |
| 600 | 685 | 725 | 780 | 428 | 368 | 398 | 393 | 490 | 20-Φ30 |
| 700 | 800 | 840 | 895 | 465 | 395 | 430 | 450 | 558 | 24-Φ30 |
| 800 | 905 | 950 | 1015 | 500 | 430 | 465 | 515 | 625 | 24-Φ30 |
| 900 | 1005 | 1050 | 1115 | 545 | 475 | 510 | 560 | 685 | 28-Φ33 |
| 1000 | 1110 | 1160 | 1230 | 600 | 520 | 560 | 610 | 750 | 28-Φ36 |
| 120 | 1330 | 1380 | 1455 | 665 | 575 | 620 | 725 | 880 | 32-Φ39 |
| 1400 | 1530 | 1590 | 1875 | 735 | 635 | 685 | 840 | 987 | 36-Φ42 |
| 1600 | 1750 | 1820 | 1915 | 800 | 700 | 750 | 960 | 1158 | 40-Φ48 |
| 1800 | 1950 | 2020 | 2110 | 890 | 770 | 830 | 1060 | 1256 | 44-Φ48 |
| 2000 | 2150 | 2230 | 2320 | 970 | 850 | 910 | 1165 | 1365 | 48-Φ48 |
| Q: Can we visit your factory to inspect the products in person? |
| A: Of course, you are welcome to visit. Our products are built to withstand scrutiny, and we are very happy to have you here. We look forward to establishing a long-term trade partnership with you! |
| Q: Can you customize the products according to the specifications and appearance I require? |
| A: Yes, we can adjust our production lines to meet your required specifications and product appearance, including color. |
| Q: What if there is no Chinese translator when we visit the factory? |
| A: We will hire relevant translators based on your language needs to ensure smooth and efficient communication. |
| Q: What market share do your products occupy in China? |
| A: From 2021 to 2024, our company's annual turnover ranged from 50 million to 100 million RMB, capturing a large share of the Chinese market. |
| Q: What are your competitive advantages compared to other companies in the industry? |
| A: Brand reputation. Our company does not compete on price, but rather on quality. We invest substantial funds into production materials, advanced equipment, and skilled technicians, focusing on building a strong brand image and a positive company reputation, rather than engaging in price competition. |
Quality (Shandong) Industrial Automation Co., Ltd. is located in Zibo City, Shandong Province, China, an area rich in cultural heritage, with a strong industrial foundation and a high level of production concentration. We are a high-tech valve manufacturing enterprise integrating design and development, manufacturing and installation, sales and service, technical communication, and international trade.
Based on conventional valves, the company actively applies new technologies, materials, and processes to research and manufacture various high-end valves, as well as general high and medium-pressure gate valves, globe valves, check valves, ball valves, etc. All products are designed, manufactured, and processed according to standards such as GB, ANSI, API, JIS, DIN, and BS. Additionally, we are capable of researching, designing, and developing high-performance special valves and non-standard products based on customer needs.
Our products are widely used in industries such as petroleum, chemical engineering, metallurgy, and power generation, and are suitable for various complex working conditions such as high temperature, high pressure, sulfur resistance, corrosion resistance, and erosion resistance.
