ZDLN electronic electric straight-through double-seated regulating valve is an industrial automation control valve consisting of an electronic electric actuator and a high-performance straight-through double-seated valve body. This valve integrates advanced servo control technology, eliminating the need for an external servo amplifier as it can directly receive 4-20mA DC or 1-5V DC standard analog signals from control systems such as PLC or DCS. The actuator, through its built-in electronic module, efficiently converts electrical energy into linear displacement to drive the valve stem, causing precise vertical movement of the double valve plugs relative to the double seats. By utilizing the change in throttling area between the double plugs and seats, it adjusts the fluid flow area in real-time to achieve accurate control of process parameters like flow rate, pressure, temperature, and liquid level. Due to its double-seated balanced plug structure, most of the unbalanced forces acting on the upper and lower plugs from the medium can cancel each other out, giving the valve significant features such as high allowable pressure differential, large flow capacity, excellent dynamic stability, and superior vibration resistance. It is particularly suitable for automated processes with high flow rates, high pressure drops, and relatively relaxed leakage requirements.

Product Image of ZDLN Electronic Electric Straight-through Double-seated Regulating Valve

1.Electronic integrated drive:Equipped with an integrated electronic electric actuator with a built-in servo system and position feedback module, significantly simplifying system wiring and reducing space requirements without the need for an external servo amplifier.
2.Excellent force balance characteristics:The double-seated plug design allows the unbalanced forces acting on the upper and lower plugs from the fluid to mostly cancel each other out. Compared to single-seated valves, it possesses superior self-balancing capability and high allowable pressure differential, easily handling high-pressure drop conditions.
3.Significant flow capacity:The straight-through double-seated flow path design provides a larger flow coefficient (Kv value) than a single-seated valve of the same nominal diameter. Its performance is especially outstanding in industrial networks requiring high-flow control.
4.Good dynamic operational stability:Due to the minimal fluid disturbance forces acting on the plugs, the valve exhibits strong anti-vibration performance and smooth operation during regulation, making it ideal for control systems with large pressure fluctuations or frequent cycling.
5.Agile and precise response:The actuator features high resolution and a minimal dead zone, accurately capturing small signal fluctuations (e.g., 4-20mA) and executing valve position compensation instantly to ensure timely dynamic response and minimal steady-state error.
6.Intelligent safety protection:The actuator includes overload, stall, and over-temperature protection. In the event of signal interruption or power failure, it can execute logical protection based on preset safety positions (full open, full close, or fail-in-place).
7.Material and environmental adaptability:Body materials include cast steel, stainless steel, and various special alloy steels, compatible with water, steam, oil, and general chemical media across power, metallurgical, chemical, and textile sectors.
8.Mature structure and easy maintenance:Utilizing a classic double-seated guiding structure, the technology is mature and reliable. Key internals adopt a standardized design, making disassembly, cleaning, and replacement of wearing parts relatively convenient while reducing comprehensive operation and maintenance costs.

Structural Drawing of ZDLN Electronic Electric Straight-through Double-seated Regulating Valve

List of Component Names and Materials

Performance Specification Sheet

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

Outline dimension table(Unit: mm)

*The performance indicators of this product comply with GB/T4213-92

Due to the rapid R&D iteration speed of valve products from China Kaivex Valve Group Co., Ltd., the above technical parameters and specification documents, including product overview, features, parts materials, outline dimension charts, CAD drawings, and product instruction manuals, are for your reference only. For actual applications, please contact our valve sales engineers to obtain the support you need for free. Thank you!