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Overview
The X44 series three-way flanged plug valve is a type of valve that switches, distributes, opens, or closes fluid passages through the rotary motion of a tapered or cylindrical plug. The valve adopts a three-way structure, with L-shaped or T-shaped medium flow ports provided on the plug. By rotating the plug 90 or 180 degrees, the flow ports align with or become offset from different passages of the valve body, thereby achieving flow direction change, merging, or diverting. The valve stem is integrally or fixedly connected to the plug. During operation, the stem and plug rotate synchronously without any lifting motion. Packing sealing is provided between the stem and the valve body to ensure reliable external sealing. Both ends and the side port of the valve body adopt flanged connections, which are fastened to the pipeline flanges by bolts, providing reliable sealing and convenient disassembly, suitable for medium and large-diameter pipeline systems under higher pressure. The valve relies on precise fit and lubrication or resilient sealing materials between the plug and the valve body sealing surfaces to achieve sealing, offering low operating torque and stable sealing performance. It is widely used in pipeline systems of petroleum, chemical, metallurgical, power and other industries for flow direction switching or distribution purposes.

X44 Series Three-Way Flanged Plug Valve Product Diagram
Feature
1 . Flanged Connection, Reliable and Convenient: Both ends and the side port of the valve body adopt flanged connections, which are fastened to the pipeline flanges by bolts, providing reliable sealing and convenient disassembly, suitable for medium and large-diameter pipeline systems under higher pressure.
2 . Three-Way Switching with Flexible Flow Path: L-shaped or T-shaped flow ports are provided on the plug. A 90-degree or 180-degree rotation of the plug completes flow direction change, merging, or diverting, providing rapid operation. Various flow control modes can be achieved according to process requirements.
3 . Reliable Sealing Performance: The sealing surfaces of the plug and valve body can be precision-lapped or lined with resilient materials such as PTFE, achieving excellent sealing effect with self-lubricating properties and smooth operation.
4 . Corrosion and Wear Resistance: The valve body and plug can be made of carbon steel, stainless steel, alloy steel, or other materials depending on the medium. Sealing surfaces can be hardened (e.g., hardfacing with cemented carbide, nitriding, etc.), providing wear resistance, erosion resistance, and long service life.
5 . Non-Rising Stem Design, Compact Installation Height: The stem and plug rotate as one unit without axial movement, resulting in a low overall height, suitable for pipeline systems with limited installation space.
6 . Bidirectional Sealing, No Flow Direction Restriction: The valve is designed for bidirectional sealing with no strict requirement on flow direction, offering greater installation flexibility.7 . Wide Range of Applications: The flanged connection offers high strength, suitable for pipeline systems in petroleum, chemical, metallurgical, power and other industries for flow direction switching or distribution purposes.

X44 Series Three-Way Flanged Plug Valve Structural diagram
List of Component Names and Materials
| 序 号/No. | 名称/name | 材料/materia |
| 1 | 阀体/valve bod | 铸铜、铸铁、铬镍钛不锈钢、铬镍钼钛不锈钢、铸钢/Cast copper, cast iron, CrNiTi stainless steel, CrNiMoTi stainless steel, cast steel |
| 2 | 塞子/Plug | 铸铜、铸铁、铬镍钛不锈钢、铬镍钼钛不锈钢、铸钢/Cast copper, cast iron, CrNiTi stainless steel, CrNiMoTi stainless steel, cast steel |
| 3 | 填料/Packing | 油浸石棉盘根、柔性石墨/Oil-impregnated asbestos packing, flexible graphite |
| 4 | 填料压盖/packing gland | 铸铜、铸铁、铬镍钛不锈钢、铬镍钼钛不锈钢、铸钢/Cast copper, cast iron, CrNiTi stainless steel, CrNiMoTi stainless steel, cast steel |
Performance Specification Sheet
| 性能规范表Performance Specification Sheet | ||
| 公称压力Nominal Pressure | 1.0 | MPa |
| 强度试验压力Strength test pressure | 1.5 | |
| 密封试验压力Sealing test pressure | 1.1 | |
| 适用温度Applicable Temperature | ≤250 | ℃ |
Standard requirements for external dimensions
1. The structural length of the valve shall comply with the standard of GB/T12221
2. Connecting flanges according to GB/T17241.6 standard

X44 Series Three-Way Flanged Plug Valve View Drawing
Outline dimension table
X44W-1.0T X44T-1.0 X44W-1.0
| 公称压力Nominal pressurePN(MPa) | 公称通径Nominal diameterDN(㎜) | 尺 寸 Measurements (㎜) | |||||||
| L | D | D1 | D2 | z-фd | □s | h | H | ||
| 1.0 | 25 | 145 | 115 | 85 | 56 | 4×ф14 | 17 | 38 | 133 |
| 32 | 170 | 135 | 100 | 78 | 4×ф18 | 18 | 45 | 152 | |
| 40 | 180 | 145 | 110 | 85 | 4×ф18 | 24 | 55 | 212 | |
| 50 | 200 | 160 | 125 | 100 | 4×ф18 | 28 | 74 | 260 | |
| 65 | 220 | 180 | 145 | 120 | 4×ф18 | 324 | 82 | 295 | |
| 80 | 250 | 195 | 160 | 135 | 4×ф18 | 04 | 95 | 327 | |
| 100 | 300 | 215 | 180 | 155 | 8×ф23 | 55 | 135 | 425 | |
| 125 | 350 | 245 | 210 | 185 | 8×ф23 | 46 | 154 | 482 | |
| 150 | 400 | 280 | 240 | 210 | 8×ф23 | 27 | 172 | 512 | |
| 200 | 450 | 335 | 295 | 265 | 8×ф23 | 5 | 195 | 605 | |
| 250 | 530 | 390 | 350 | 320 | 8×ф23 | 85 | 230 | 660 | |
| 300 | 580 | 440 | 400 | 368 | 8×ф23 | 100 | 263 | 760 | |
X44W-1.0 P/R/C
| 公称压力Nominal pressure | 公称通径Nominal diameter | 尺寸measurements(mm) | |||||||
| PN(Mpa) | DN(㎜) | L | D | D1 | D2 | Z-фd | □s | h | H |
| 1.0 | 25 | 145 | 115 | 85 | 56 | 4×ф14 | 17 | 38 | 133 |
| 32 | 170 | 135 | 100 | 78 | 4×ф18 | 18 | 45 | 152 | |
| 40 | 180 | 145 | 110 | 85 | 4×ф18 | 24 | 55 | 212 | |
| 50 | 200 | 160 | 125 | 100 | 4×ф18 | 28 | 74 | 260 | |
| 65 | 220 | 180 | 145 | 120 | 4×ф18 | 32 | 82 | 295 | |
| 80 | 250 | 195 | 160 | 135 | 4×ф18 | 40 | 95 | 327 | |
| 100 | 300 | 215 | 180 | 155 | 8×ф23 | 45 | 135 | 425 | |
| 125 | 350 | 245 | 210 | 185 | 8×ф23 | 54 | 154 | 482 | |
| 150 | 400 | 280 | 240 | 210 | 8×ф23 | 62 | 172 | 512 | |
| 200 | 450 | 335 | 295 | 265 | 8×ф23 | 75 | 195 | 605 | |
| 250 | 530 | 390 | 350 | 320 | 8×ф23 | 85 | 230 | 660 | |
| 300 | 580 | 440 | 400 | 368 | 8×ф23 | 100 | 263 | 760 | |

Model:
BX44W-1.0 P/R/CSpecification:
DN20-DN300Pressure:
PN1.0Material:
Cast steel, stainless steel
Model:
X14W-1.0/X14W-1.0P/X14T-1.0Specification:
DN15-DN100Pressure:
PN1.0Material:
Cast copper, cast iron, stainless steel, cast steel
Model:
X47W-1.0Specification:
DN50-DN300Pressure:
PN1.0Material:
Gray cast steel