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JSW Three Position Pneumatic Actuator - Precision Multi-angle Series

Product Overview

Specifically, the JSW three position pneumatic actuator is a precision industrial actuating device designed for multi‑angle control of valves and rotating mechanisms. Unlike standard on‑off actuators, this three position pneumatic actuator supports two main adjustment modes: 0°/45°/90° or 0°/90°/180°, with an adjustable midway position. For 90° actuators, common midway positions include 20°, 30°, 40°, 50°, and 70° — these can be customized according to actual application requirements. Furthermore, the actuator complies with ISO 5211 and NAMUR mounting standards, ensuring compatibility with solenoid valves, limit switch boxes, and positioners from leading global manufacturers. For related products, you can also explore our pneumatic actuator series, scotch yoke pneumatic actuator, and learn about our manufacturing facility.

How the Three Position Pneumatic Actuator Works

The three position pneumatic actuator achieves its midway position through mechanical limiting of two auxiliary pistons. This design ensures stable and reliable positioning without position drift — a critical requirement for multi‑angle flow regulation applications. The actuator adopts solenoid valve control, with three working positions (midway, full open, full close) switched by controlling air intake and exhaust of different ports. The basic configuration uses two solenoid valves; for more complex position switching sequences (such as 0°→45°→90°→45°→0°), three solenoid valves are optionally available. Additionally, the actuator features precise stroke adjustment: full open and close positions can be calibrated within -5° to +5° (relative to 0° and 90°), and the full stroke (0°-90°, 0°-120°, 0°-180°) supports arbitrary angle setting via special bolts on the end cover.

JSW Actuator Core Advantages

1.Multi‑Position Adjustable

This three position pneumatic actuator supports 0°/45°/90° or 0°/90°/180° operation, with customizable midway positions. For 90° models, the midway position can be adjusted between 20° and 70°, meeting diverse flow control needs across different valve types.

2.Precise Positioning

Mechanical limiting of auxiliary pistons ensures a stable midway position without position drift. Full open/close positions offer ±5° calibration, providing high control accuracy for applications requiring precise flow regulation.

3.Flexible Solenoid Valve Control

Solenoid valve‑driven switching between three positions enables simple operation and fast response. The actuator is fully compatible with automatic control systems, supporting integration into existing PLC or DCS infrastructures.

4.Wide Stroke Range

Full stroke is adjustable within 0°-90°, 0°-120°, or 0°-180°, adapting to different valve types (ball valves, butterfly valves, plug valves) and application scenarios — from simple on‑off to complex multi‑position modulation.

5.Easy On‑Site Adjustment

Stroke and midway position are adjusted via bolts with lock nuts, requiring no complex tools. This design makes on‑site calibration fast and convenient for maintenance technicians.

Industry Applications

Valve Control Industry

This three position pneumatic actuator is ideal for ball valves and butterfly valves in water treatment, HVAC, and chemical industries, enabling multi‑angle flow regulation where simple on‑off control is insufficient.

Automation Production Lines

The actuator controls rotating mechanisms, robotic arms, and conveying equipment, achieving precise position switching for automated manufacturing processes requiring intermediate stopping positions.

Heating & Ventilation Systems

Adjusting air valves and dampers to control air volume at different positions, optimizing energy efficiency in building management systems.

Petrochemical Industry

Controlling pipeline valves with multi‑position requirements, ensuring safe and stable media transmission in refineries, chemical plants, and pipeline networks.

Food & Pharmaceutical Equipment

Adjusting processing machinery components while meeting hygiene and precision control standards required by FDA and GMP regulations.

Technical Specifications

Position limit adjust

Full open and close position control, close position and open position through the two adjustment bolts, can accurately control actuators from -5°to +5°to (0°,90°) adjusted stroke position, as long as the left-handed or right-handed adjustment bolts, and at the right position lock nut.

Full stroke position adjustment

Series pneumatic actuators in a specially designed 0°to 90°, 0°to 120°, within the scope of 0°and 180°can adjust any Angle, set by end cover and the special bolt.

FAQ

Questions	Answers
What is the adjustable range of the midway position?	For 90° actuators, the midway position can be adjusted between 20°-70°; for 180° actuators, it supports custom angles (e.g., 60°, 90°, 120°) based on requirements.
How to calibrate the full open/close positions?	Use the two adjustment bolts on the actuator: turn left/right to adjust the stroke within ±5° relative to 0°/90°, then lock with the nut.
What solenoid valve configuration is required?	The basic configuration uses 2 solenoid valves; for more complex position switching (e.g., 0°→45°→90°→45°→0°), 3 solenoid valves are optional.
What types of valves is this actuator compatible with?	It is compatible with ball valves, butterfly valves, plug valves, and other 90°/180° rotating valves, suitable for multi-position flow regulation.