Linear-turn Electric Actuator
Product Overview
PSL execution structures include PSL201, PSL202, PSL204, PSL208, PSL210, PSL312, PSL314, PSL316, PSL320, and PSL325. It has the characteristics of small size, light weight, strong function, built-in intelligent controller, convenient operation, stroke up to 100mm, thrust up to 25KN, etc. It can be widely used in linear motion valve switch and adjustment control.
Main Features
1. The stroke of PSL straight-stroke electric actuator can be adjusted, which is convenient to connect with the valve.
2. All electrical components are reliable in quality and long in service life.
3. The wiring of the electrical components of the PSL series actuator is rigorous and completely isolated from the transmission components, which improves the reliability of the operation of the actuator
4. The PSL series actuator is connected with the valve by a flexible coil spring, which can avoid the influence of the valve stem and the output shaft being out of axis. The closing force of the valve can be preset to ensure the reliable closing of the valve and prevent leakage.
5. Simple structure, small size, light weight, easy installation and maintenance: all mechanical parts are made by CNC processing with exquisite workmanship.
6. The PSL electric actuator is designed as an integrated structure. The position transmitter and the servo amplifier can be directly loaded into the actuator as two independent components, directly accepting the 4-20mA control signal, and outputting 4-20mA or 1-5DC Valve position anti-debt signal, with self-diagnosis function, very convenient to use and adjust.
7. Functional modular structure design, through the combination of different options, realizes simple to complex control, and meets different application requirements
8. The transmission all adopts small backlash sealed gears, which have high efficiency, low noise, long service life, stability and reliability, and no need to refuel.
9. It has a variety of operating speeds, which can meet the requirements of various control systems to ensure the rapid response and stability of the system.
10. The drive motor on the PSL actuator is a high-speed synchronous motor made of high-performance rare earth magnetic materials, which runs smoothly. It has the advantages of small size, large torque, anti-stall, and high control precision.
11. Segmental adjustment can be set, that is, two actuators are controlled by a dual-time proportional signal output by a PID regulator (4-12mA corresponds to full open and full close of PSL1.
12. 20mA corresponds to full open 1 full close of PSL2).
13. The valve position feedback element adopts a fully sealed high-precision multi-turn potentiometer, which has the characteristics of small size, high precision, small dead zone, and long service life.
Product Structure
PSL linear actuator is mainly composed of electric control part and gear transmission part which are isolated from each other. The motor is used as an intermediate part connecting the two isolated parts. The motor outputs torque according to the control requirements, and transmits it to the trapezoidal screw through the multi-pole spur gear.
The screw converts the torque into thrust through the rod thread. The stem thread is self-locking and transmits linear travel to the stem through an adapter to the valve. The output shaft of the actuator has a locking pin to prevent rotation, and the radial locking device of the output shaft can be used as a position indicator.
The locking device is connected with a connecting rod, and the connecting rod runs synchronously with the output shaft. The displacement of the output shaft is converted into an electrical signal through the circuit board connected with the connecting rod, which is provided to the servo amplifier as a comparison signal and valve position feedback output.
At the same time, the actuator The stroke can also be limited by two main limit switches on the switch board, and the limited position can be adjusted by two mechanical limit stops.
Technical parameters
Inteligent Controler PASP4
(1) PSAP4 is the intelligent proportional circuit for the PS electric actuator. Using SMT process technology, it has the characteristics of small size and high reliability. This circuit compares the 4-20mA current signal of the control actuator with the current position signal of the actuator, and controls the electric actuator to open or close according to the deviation, so that the position of the actuator is balanced with the input signal.
(2) PSAP4 realizes that the actuator operates with the input 4-20mA signal, and also provides a set of 4-20mA position signals to the system that are isolated from the working power supply, input signal and position conversion circuit.
(3) PSAP4 can easily adjust the initial position and stroke of the actuator: by modifying the menu, it can realize switching between positive and Set the location of the operating mechanism.
(4) The circuit principle is shown in the figure below. The intelligent controller is based on a dedicated single-chip microprocessor, and converts digital signals through input loop analog signals and valve position resistance signals. After the microprocessor passes the artificial intelligence control software according to the sampling result, it displays the result and outputs the control signal.
Local Control Box Operation PSML
On-site control PSML can realize on-site electronically controlled action actuators. The control signal can be switched between "local" and "remote" through the selector switch, and after switching to "local", the actuator can be turned on/off/closed by the manual button. The middle switch position is usually "stop", the actuator can move in two directions by pulling the switch, release the pull switch, and the switch will bounce back to the middle position.
Switch Action Mode Electrical Wiring Diagram
Open the casing and you can see as shown in the figure. There are terminal strips in the casing of the PSL actuator for electrical wiring. Select an appropriate power line to connect to the actuator. It is recommended to use a medium (mm) wire.
How to Debug PSL Series Linear Electric Actuator
1. Adjustment of the limit switch of the PSL linear actuator After the actuator is connected to the valve, the PSL actuator must be set to meet the valve control requirements. The limit switch of the actuator is adjusted according to the valve type is determined by the "travel" or "Closing Force/Stroke" Basic Principles
(1) For straight-through valves, first set the closed position according to the "shutoff force/stroke", and then set the open position according to the rated stroke of the valve
(2) For the three-way valve, set the two terminal positions according to the "shutoff force/stroke", and determine the limit switch of the actuator according to the "shutoff force/stroke"
(3) The spool of the valve driven by the manual actuator contacts the valve seat. When the valve stem starts to move axially, the force on the valve stem is the reaction force of the coil spring of the actuator.
(4) Continue to drive the actuator in the same direction until the coil spring of the actuator is compressed to the corresponding value shown in the coil spring diagram. This ensures the shut-off force and prevents leakage
Hot Tags: linear-turn 220v air regulator electric actuator, China, manufacturers, suppliers, factory, buy, price, quotation, Control Valve Actuator, Electric Actuated Butterfly Valve, Electric Butterfly Valve, Pneumatic Actuator Butterfly Valve, Electric Gate Valve Actuator, Electric Regulating Valve
