This flow control valve is a specialized component used in urea melt distribution systems within chemical manufacturing plants. Its primary function is to precisely regulate the flow rate of urea melt to individual branches or distribution lines, ensuring consistent and accurate delivery to downstream processes. By maintaining optimal flow balance, the valve prevents flow imbalances between different branches, which is critical for process stability and product quality.
The valve operates by adjusting the flow area through a movable element such as a plug, ball, or gate, which is controlled by an actuator. As the actuator position changes, the flow passage constricts or expands, thereby regulating the flow rate. This adjustment can be manual or automated based on system requirements.
Key parameters for selection include nominal diameter (DN15–DN50, ISO 6708), operating pressure (1.0–1.6 MPa), operating temperature (130–150°C, as urea melt solidifies below 130°C), flow coefficient (Kv 2.5–25, IEC 60534-2-3), flow control accuracy (±2%), leakage rate (≤0.01% of max flow, ISO 5208 Class VI), actuator type (pneumatic), supply pressure (0.4–0.6 MPa, ISO 6358), electrical signal (4–20 mA, IEC 60381-1), body material (316L, ASTM A351 CF3M), seat material (Stellite 6, ASTM A608), connection type (flanged, ASME B16.5), and weight (15–60 kg).
Materials on file include stainless steel (316L/304) and alloy steel. These values are reference ranges and must be verified for the specific model and application with the legal manufacturer or supplier. The valve is designed for easy maintenance with flanged connections. It is essential to confirm that the selected valve meets the required standards and performance criteria for your specific urea melt distribution system.
The valve regulates flow by adjusting the flow area through a movable element (plug, ball, or gate) controlled by an actuator. As the actuator moves, the flow passage changes, increasing or decreasing the flow rate. Manual or automated adjustment is possible. The valve maintains precise flow control to ensure uniform distribution across branches, preventing imbalances. The actuator is typically pneumatic, requiring a supply pressure of 0.4–0.6 MPa, and may receive a 4–20 mA signal for positioner feedback. The valve is designed to operate within specified pressure and temperature ranges, and its leakage rate is minimal to prevent cross-contamination.
