Customization: | Available |
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Structure: | Extreme Limit Switch |
Type: | Explosion-Proof Limit Switch |
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Valve monitors (limit switch boxes) are rotary position devices used for both local and remote indication of valve position. Indicators are typically mounted to the top of standard pneumatic rotary actuators via the standard Namur VDI/VDE-3845 mounting pad.
Output shaft from the air actuator rotates 90º turning the input shaft of the monitor and moving the visual indicator from closed to open (reverses to close). In addition, limit switches provide a dry contact output signal in both the open and closed position. This signal is used to remotely confirm the valve position.
SPECIFICATION
Material | Standard:Aluminum alloy | |
Option: Stainless Steel 316 | ||
Enclosure | Standard:Weatherproof Type 4, Nema 4X and IP67 construction | |
Traval angle | 0° ~ 90° | |
Switches | Mechanical switche (SPDT*2) or (DPDT*2) | 5A 250VAC: Ordinary |
16A 125VAC/250VAC: Omron, Honeywell, etc | ||
10A 30VDC: Ordinary,Omron, Honeywell, etc | ||
Proximity switch*2 | ≤150mA 24VDC: Ordinary ≤150mA 30VDC: P&F NBB3, etc ≤150mA 8VDC: Intrinsically safe: Ordinary Intrinsically safe P&F NJ2, etc |
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Ambient temperature | Standard:-20~80ºC | |
Option: -40~80ºC | ||
Cable entry | 2X NPT1/2", NPT3/4",M20, G3/4"etc. | |
Terminal strips | Standard: 8 points | |
Option: 12 points | ||
Shaft | Standard: S.S. 304 | |
Option: S.S. 316 | ||
Fastener | Standard: Carbon steel | |
Option: S.S. 304 or 316 | ||
Indicator lid | Dome lid | |
Flat lid | ||
Position Indicator color | 2-way: yellow(open)/red(close) | |
2-way: green(open)/red(close) | ||
Coating | Black, Red, Yellow, Blue, Silver, etc | |
Packaging specification | 1 pc/box, 16 pcs/ carton |