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6NN-K5-N4-C2A
Basic SOR pressure switches with standard wetted parts are normally suitable for air, oil, water
and non-corrosive processes. Corrosive service and particular customer requirements may require
optional components. Refer to How to Order on page 3 to locate optional components, such as,
housing, switching elements, diaphragm systems, pressure ports and accessories. Each position in
the model number, except Accessories, must have a designator.
| Weatherproof Model Number | Adjustable Range (increasing pressure) psi | 
| 6NN - K2 - N4 - F1A | 7 to 30 | 
| 6NN - K3- N4 - F1A | 12 to 100 | 
| 6NN - K5- N4 - F1A | 20 to 180 | 
| 6NN - K45- N4 - F1A | 25 to 275 | 
| 5NN - K3- N4 - F1A | 25 to 240 | 
| 5NN - K5- N4 - F1A | 35 to 375 | 
| 5NN - K45- N4 - F1A | 45 to 550 | 
| 9NN - K4- N4 - F1A | 100 to 500 | 
| 9NN - K5- N4 - F1A | 200 to 1000 | 
| 9NN - K45- N4 - F1A | 200 to 1750 | 
| 1NN - K45- N4 - F1A | 500 to 4000 | 
Standard Construction
• Housing: NN - aluminum; L - cast iron
• Switching Element: SPDT; K - 15 amps @ 250 VAC
• Diaphragm & O-ring: N4 - primary (wetted)
diaphragm, TCP; o-ring (wetted) Buna-N
• Pressure Port: 1/4” NPT(F); B1A - aluminum;
F1A - carbon steel

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| Hontai Machinery and equipment (HK) Co. ltd | 
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