ZAZN electric straight-through double-seated regulating valve is an industrial automation control valve composed of a linear electric actuator and a straight-through double-seated balanced valve body. By receiving standard analog signals (4-20mA DC or 0-10V DC) from control systems such as PLC or DCS, the valve accurately converts electrical energy into axial thrust. This thrust drives the valve stem, moving the upper and lower valve plugs relative to the seats. Due to the double-plug structure, the forces acting on the upper and lower plugs from the medium are opposite in direction and similar in magnitude, allowing most of the unbalanced force to be offset. Consequently, this valve features a large allowable pressure differential, high flow capacity, and excellent vibration resistance, making it particularly suitable for industrial process control systems with high flow rates, high pressure drops, and relatively relaxed leakage requirements.

Product Image of ZAZN Electric Straight-through Double-seated Regulating Valve

Feature

1.Excellent force balance characteristics:The dual-seat plug design utilizes the opposing thrust generated by the fluid on the upper and lower plugs to balance the forces, significantly reducing the output thrust required from the actuator. Under the same configuration, its allowable working pressure differential is much higher than that of a single-seated regulating valve.
2.High flow capacity:The valve body features a dual-channel flow path design. For the same nominal diameter, its rated flow coefficient (Kv value) is larger than that of a single-seated valve, allowing it to handle high-flow conditions more effectively.
3.Strong dynamic stability:Due to the low unbalanced force, the valve plug experiences minimal fluid disturbance during operation, effectively suppressing vibration and whistling during opening or regulation for smoother performance.
4.Integrated intelligent drive:Equipped with a high-performance electric actuator with an integrated electronic servo control system. It supports features such as fail-in-place upon signal loss, stroke limiting, and thermal overload protection, requiring no external air supply and offering simple wiring and easy maintenance.
5.Precise regulation characteristics:The valve plug profile is precisely calculated and machined to provide various flow characteristic options, such as equal percentage or linear, ensuring the control loop maintains high linearity and repeatability even under high load fluctuations.
6.Wide environmental adaptability:Valve body materials are available in cast iron (HT200), cast steel (WCB), and stainless steel (CF8/CF8M). The actuator has a high protection rating, making it suitable for harsh industrial sites such as outdoor, high-temperature, or humid environments.
7.Self-locking and fail-safe protection:The electric drive mechanism possesses natural mechanical self-locking characteristics, maintaining the current valve position instantly upon power failure to ensure process continuity and safety.
8.Mature and reliable structure:Adopts a classic guiding structure with excellent component interchangeability. Different valve bonnets, such as standard, extended (radiator type), or bellows-sealed types, can be selected according to the medium temperature to meet diverse needs.