The FYL Straight Through Diaphragm Valve is engineered for applications where media purity, corrosion resistance, and operational stability are required. Its core design separates the actuator from the process fluid using a flexible diaphragm, reducing the risk of internal corrosion and mechanical wear.
The straight-through channel design allows media to pass with minimal resistance, which helps reduce sediment buildup and lowers the risk of clogging. This structure makes it suitable for fluids containing particles, slightly corrosive liquids, or viscous media. It is widely applied in water treatment systems, chemical processing lines, food production facilities, and industrial utility systems.
The diaphragm sealing structure forms a reliable barrier between the fluid and valve body. This reduces leakage points commonly found in traditional valve designs and improves system safety during continuous operation.
The valve is designed for quick diaphragm replacement without dismantling the entire pipeline. This simplifies maintenance procedures and helps reduce downtime during servicing.
A straight flow path reduces internal resistance and minimizes material accumulation. This makes the valve more suitable for slurry, suspended particles, and viscous industrial fluids.
With durable sealing materials and stable structural design, the valve reduces frequent replacement needs and lowers maintenance-related expenses over time.
| DN Size | Inch | Pressure Rating (MPa) | Working Pressure (MPa) | Length (L mm) | Body Diameter (D mm) | Flange Diameter (D1 mm) | Bolt Configuration |
|---|---|---|---|---|---|---|---|
| 20 | 3/4" | 1.0 | 1.0 | 115 | 105 | 75 | 4-14 |
| 25 | 1" | 1.0 | 1.0 | 125 | 115 | 85 | 4-14 |
| 32 | 1¼" | 1.0 | 1.0 | 150 | 140 | 100 | 4-18 |
| 40 | 1½" | 1.0 | 1.0 | 160 | 150 | 110 | 4-18 |
| 50 | 2" | 1.0 | 1.0 | 188 | 165 | 125 | 4-18 |
| 65 | 2½" | 1.0 | 1.0 | 215 | 185 | 145 | 4-18 |
| 80 | 3" | 1.0 | 1.0 | 250 | 200 | 160 | 8-18 |
| 100 | 4" | 1.0 | 1.0 | 300 | 220 | 180 | 8-18 |
| 150 | 6" | 0.6 | 0.6 | 400 | 285 | 240 | 8-22 |
| 200 | 8" | 0.6 | 0.6 | 520 | 340 | 295 | 8-22 |
| 300 | 12" | 0.4 | 0.4 | 750 | 445 | 400 | 12-22 |

Used for controlling water flow, sludge, and wastewater media where anti-clogging performance is required.
Suitable for handling mild corrosive liquids and chemical solutions while protecting internal valve components.
Applies to hygienic fluid transfer processes with easy cleaning and reduced contamination risk.
Used in cooling water systems, treatment plants, and environmental protection equipment with stable long-term operation.
Supports customized requirements including material selection, size adjustment, and connection standards for project integration.
Each valve is produced under a controlled process with strict inspection at every stage, ensuring consistent structural accuracy and sealing performance.
FYL provides tailored solutions based on different pressure levels, media types, and installation environments to meet diverse industrial needs.
Standard models can be delivered quickly, while customized orders follow a structured production schedule to ensure timely project support.
Technical support and after-sales service are available for global customers, helping resolve installation and operational issues efficiently.