Differences Between Electric Valves and Solenoid Valves in Bladder Accumulators

Bladder Accumulator's electric valve and solenoid valve differ in that when the solenoid valve coil is energized, it creates a magnetic attraction that overcomes the torsion spring pressure to operate the valve body. The coil structure is simple and cost-effective, but it can only perform on/off control. In contrast, the electric valve is driven by a motor to move the valve seat and operate the valve core. Furthermore, the electric valve also features a split valve body and supports dual-function fully open and fully closed operation. The regulating valve is equipped with an electric valve positioner on top, using closed-loop control to dynamically balance the valve body at a position, even at the edge of the working space.

Comparison of operating actions between electric valves and solenoid valves: the former is only suitable for on/off control. DO control is only suitable for small pipeline control within DN50 for general operation. The latter is used for on/off control of liquid and gas medium pipelines, with two DO controls, and is generally used for small pipe control. Electric valves: used for analog control of liquid, gas, and air system pipeline media flow, implementing AI control. Even for large valve bodies and air systems, electric valves can perform two-position on/off control.

When operating, the solenoid valve of the bladder accumulator has AI feedback signals and can be controlled via DO and AO, while also including relatively larger piping and vibration dampers, etc. Its on/off is driven by a coil and can only open or close. Electric valve actuation is typically achieved via a motor, completing the required on/off control, and can be adjusted according to presets. Solenoid valves generally have higher flow coefficients and smaller working pressure differences. For example, a standard 25mm solenoid valve has a lower flow coefficient compared to a 15mm electric valve. Solenoid valve actuation relies on a coil, making it susceptible to damage from voltage surges.