Product Overview
The APL-310N Limit Switch Box is a reliable valve position indicator and feedback device designed for industrial automation systems. It is used to monitor the open and closed positions of quarter-turn valves, including ball valves and butterfly valves, when operated by pneumatic or electric actuators.
By providing real-time mechanical and electrical position feedback, the APL-310N helps ensure safe and accurate valve operation in process control systems, especially where remote monitoring is required.
Features
- Die-cast aluminum alloy shell, powder coating, beautiful appearance and reliable quality
- Switch position can be clearly identified by the indicator
- Quickly set the cam, mounted via spline shaft and spring, easy to adjust without tools.
- Multi-contact terminal block with 8standard contacts for safe and convenient wiring
- Standard wire interface
- Anti-off bolts, bolts attached to the upper cover will not fall off when disassembling.
- Easy installation, stainless steel spindle connection, and mounting bracket. All comply with NAMUR standards
Technical Specifications
| APL200,300,400,500 Series | ||
| Shell | Standard | Option |
| Temperature | 200 Series(IP66) 300 Series( IP66) 400 Series(Exd II BT6 IP66) | |
| 500 Series( Exd IICT6 Gb DIP A21TA,T6 IP66 ) | ||
| -25℃~+85℃ | ||
| Wiring port | 2XNPT1/2(200/300 Series applicable) | PT1/2(200/300 Series applicable) |
| 2XNPT3/4(400/500 Series applicable) | PF1/2(200/300Type Series applicable) | |
| M20.PG13.5(200/300 Series applicable) | ||
| PT3/4(400/500 Series applicable) | ||
| PF3/4(400/500 Series applicable) | ||
Applications
The APL-310N valve position indicator is widely used in industrial automation systems where valve status monitoring is required:
- Oil & gas pipeline valve monitoring
- Water and wastewater treatment systems
- Chemical processing plants
- Power generation facilities
- Industrial automation control systems
- Food and pharmaceutical production lines
In a typical wastewater treatment plant, the APL-310N is installed on butterfly valves to provide real-time feedback to the control room, ensuring that flow regulation valves are operating correctly and safely.
FAQ
Q1: What is a limit switch box used for?
A limit switch box is used to provide open/close position feedback of valves in automated control systems.
Q2: What valves is APL-310N compatible with?
It is mainly used with quarter-turn valves such as ball valves and butterfly valves.
Q3: Is APL-310N suitable for outdoor use?
Yes, with its IP67-rated aluminum housing, it can be used in outdoor and harsh environments.
Q4: What mounting standard does it use?
It uses NAMUR standard mounting, compatible with most pneumatic actuators.
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