Audited Supplier
The swing check valve series is among the most versatile options in this category. The valve operates using a disc that opens with media flow and closes to prevent reverse flow. It features a simple structure, reliable sealing, and a low flow resistance coefficient. Suitable for both horizontal and vertical pipelines, this valve comes in three sealing forms: soft-sealing, hard-sealing, and dual-sealing, offering wear resistance, corrosion resistance, and a long service life.
The swing check valve is widely used in industries such as chemical processing, petroleum, natural gas, power generation, metallurgy, pharmaceuticals, food production, and electronics where clean media flow is required.
Installation Methods
Vertical installation
Horizontal installation (recommended to avoid inclined positions)
| Model | Nominal Pressure (MPa) | Nominal Diameter (DN) | Body Material | Disc Material | Sealing Material | Operating Temperature | Applicable Media | Connection Type | Installation Type |
| H44H-16 | 1.6 | DN50-DN500 | WCB, CF8, CF8M | 2Cr13, 304, 316 | Hard Alloy, Stainless Steel | -29 ~ 425 | Water, Steam, Oil, Acidic Media | Flanged | Horizontal, Vertical |
| H44H-25 | 2.5 | DN50-DN500 | WCB, CF8, CF8M | 2Cr13, 304, 316 | Hard Alloy, Stainless Steel | -29 ~ 425 | Water, Steam, Oil, Corrosive Media | Flanged | Horizontal, Vertical |
| H44H-40 | 4 | DN50-DN300 | WCB, CF8, CF8M | 2Cr13, 304, 316 | Hard Alloy, Stainless Steel | -29 ~ 425 | Water, Steam, Oil, Corrosive Media | Flanged | Horizontal, Vertical |
| H44H-64 | 6.4 | DN50-DN200 | WCB, CF8, CF8M | 2Cr13, 304, 316 | Hard Alloy, Stainless Steel | -29 ~ 425 | High-Pressure Water, Steam, Oil | Flanged | Horizontal, Vertical |
| H44W-16 | 1.6 | DN50-DN500 | Stainless Steel 304, 316 | Stainless Steel 304, 316 | Integral Stainless Steel | -40 ~ 200 | Corrosive Media, Mild Acids/Bases | Flanged | Horizontal, Vertical |
| H44Y-25 | 2.5 | DN50-DN400 | CrMo Alloy Steel | Alloy Steel | Hard Alloy | -29 ~ 540 | High-Temperature High-Pressure Steam | Flanged | Horizontal, Vertical |
| Standard Name | Standard Code |
| Design Standard | GB/T 12236 |
| Structural Length Standard | GB/T 12221 |
| Flange Connection Standard | HG/T 20592 |
| Inspection and Testing Standard | GB/T 26480 |
| Parts | Materials |
| Valve Body/Disc | WCB, CFB, CF8, CF8M, Malleable Iron |
| Seat | WCB + D507, CF8 + STL, CF8M + STL |
| Shaft | 2Cr13, 304, 316, Nitrided Steel |
1.6 MPa Parameters
| Nominal Diameter (DN) | L (mm) | D (mm) | D1 (mm) | D2 (mm) | H (mm) |
| 50 | 230 | 160 | 125 | 100 | 160 |
| 65 | 290 | 180 | 145 | 120 | 177 |
| 80 | 310 | 195 | 160 | 135 | 187 |
| 100 | 350 | 215 | 180 | 155 | 202 |
| 125 | 400 | 245 | 210 | 185 | 227 |
| 150 | 480 | 280 | 240 | 210 | 263 |
| 200 | 550 | 335 | 295 | 265 | 293 |
| 250 | 650 | 405 | 355 | 320 | 330 |
| 300 | 750 | 460 | 410 | 370 | 382 |
| 350 | 850 | 520 | 470 | 430 | 430 |
| 400 | 950 | 580 | 525 | 480 | 480 |
| 450 | 1025 | 640 | 585 | 550 | 520 |
| 500 | 1150 | 715 | 650 | 610 | 560 |
2.5 MPa Parameters
| Nominal Diameter (DN) | L (mm) | D (mm) | D1 (mm) | D2 (mm) | H (mm) |
| 50 | 230 | 160 | 125 | 100 | 177 |
| 65 | 290 | 180 | 145 | 120 | 183 |
| 80 | 310 | 195 | 160 | 135 | 183 |
| 100 | 350 | 230 | 190 | 155 | 217 |
| 125 | 400 | 270 | 220 | 185 | 250 |
| 150 | 480 | 300 | 250 | 210 | 270 |
| 200 | 550 | 360 | 310 | 275 | 350 |
| 250 | 650 | 425 | 370 | 330 | 410 |
| 300 | 750 | 485 | 430 | 390 | 430 |
| 350 | 850 | 550 | 490 | 450 | 450 |
| 400 | 950 | 610 | 550 | 500 | 560 |
| 450 | 1025 | 660 | 600 | 550 | 595 |
| 500 | 1150 | 730 | 660 | 610 | 618 |
| 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.
