Time：2026-05-26 09:20:08 Browser 2 Origin：本站
It features a built-in microprocessor, allowing precise control of the valve opening and supporting powerful functions such as automatic setpoint adjustment, PID control, and HART communication.
With a spool/flap torque motor structure, it enhances resistance to dust, moisture, and oil contamination.
The device is equipped with an external LCD, enabling on-site confirmation of the positioner\'s status directly.
Through HART communication, various information about the valve and positioner can be obtained.
An additional valve position output module can be added to provide feedback on the valve opening.
Flow characteristics such as linear, quick-open, and equal percentage can be freely set.
PID parameters can be conveniently adjusted via the buttons on the product, and 16 points can be set to achieve custom flow curves.
YT-3300/3500 Intelligent Valve Positioner Series; Selection Table
The YT-3300 / 3350 / 3303 / 3301 series intelligent valve positioners can respond to 4 ~ 20 mA controller input signals to accurately control valve stroke. The built-in microprocessor can optimize positioner performance and implement specific functions, such as automatic calibration, PID control, and HART protocol communication.
The SWP2 series features PST functionality (Partial Stroke Test) with a NAMUR 8 VDC NC signal. The positioner only provides a 4-20 mA analog signal feedback, but the field requires an 8 VDC signal to the valve to determine the open and closed positions.
Internal Structural Diagram:
4-20mA signal analog feedback, monitoring the real-time operating status of the valve, SOLDO SS70 NAMUR 8VDC NC signal, which can monitor the open and closed position status through a safety barrier.
SOLDO SW Valve Positioner (with Stainless Steel Display) and Safety Barrier Control Principle
I. Basic Principles of SOLDO SW Explosion-Proof and Flameproof Technology
Classification of SOLDO SWP2 Valve Positioner (with Stainless Steel Display) as Flameproof and Intrinsically Safe Feedback Electrical Equipment
NAMUR Signal 8VDC NC Signal
The SOLDO SWP2 feedback transmitter features a compact design with visually effective indicators. Options include: mechanical, proximity (NAMUR 8VDC, NPN, PNP, SPDT, DPDT), solid-state, pneumatic switches, and HART, FF, PROFIBUS, 4-20mA bus communications. The range includes SK/SQ/SY/SQ/SF/SS/SB/SA/BM series products, made from aluminum (316L stainless steel) and surface-coated with epoxy and polyester powders (electroplating finish), UV-resistant and VO-grade polycarbonate 3D indicators, stainless steel shafts, suitable for single-acting and double-acting actuators, low-power 3-way or 5-way solenoid valves, vibration-resistant frames, supporting standard installation setups, threaded connections, and VDI/VDE3847 pneumatic output lines. SOLDO can provide customers with complete valve process control solutions and customize valve limit switch box products to meet specific operational conditions. Shengweike Company is a supplier of fluid control solutions and control valve products, including complete control valves, integrated switch valves, pneumatic control schemes, electrical control schemes, and automated control valve products. Under the premise of providing satisfactory services and products to customers, through proactive spirit and innovative technology, the company has extensive experience in the shipbuilding industry, semiconductor field, power industry, chemical industry, and has maintained effective cooperation with domestic and international clients.
SOLDO SWP2 Feedback Device also features Partial Stroke Test (PST) functionality
