The ZXP/ZDLP/ZAZP series of pneumatic/electric single-seat control valves adopt a top-guided structure and feature compact construction, light weight, and sensitive operation. The flow path is S-shaped, resulting in low pressure drop loss, high flow capacity, precise flow characteristics, and convenient maintenance. Equipped with multi-spring actuators or electric actuators, they can operate under demanding working conditions. They are particularly suitable for applications with small leakage and minimal pressure differentials across the valve.

This series of products comes in various types, including standard, heat-dissipating, low-temperature, regulating cut-off, bellows-sealed, and jacket-insulated types. The nominal pressure ratings are PN (MPa) 1.6, 2.5, 4.0, 6.4, 10.0 (150lb, 300lb, 600lb); the valve body size range is DN (mm) 20-400 (3/4" - 16"); they are suitable for multiple fluid temperatures within the range of -196 to +560°C; leakage standards include Class IV, V, VI; flow characteristics include linear and equal percentage. Multiple specifications are available for selection.

Pneumatic ZXP:
The positioner receives standard current signals or computer signals, converts them into valve position setpoints. The linear displacement of the actuator is converted into angular displacement through a connecting device and measured by a position sensor, which is then fed back to the microprocessor.
The microprocessor compares the actual valve position feedback value with the setpoint. Upon detecting a deviation, it outputs a pulse-width modulation (PWM) command based on the magnitude and direction of the deviation to control the pneumatic valve. The pneumatic valve adjusts the inlet or exhaust air volume of the diaphragm actuator according to the control command.

Electric ZDLP:
Standard current signals or computer signals are converted via A/D and then enter the intelligent signal acquisition control unit of the intelligent electric actuator.
The signal acquisition control unit continuously detects the input signal and position feedback signal. When the two signals are unbalanced, it outputs a pulse-width modulation (PWM) command based on the magnitude and direction of the deviation to the bidirectional controllable silicon, energizing it and driving the motor to rotate in the direction that reduces the deviation, thereby driving the speed-reducing mechanism and changing the valve opening