Enclosure 6N Pressure Switches
Page 4
PROCESS CONNECTIONS
The process connections are:
Models 160P and 180P, both ports: ¼” - 18 NPT female standard. On Model 180P, the
vacuum port is on the side of the round housing, and the normal pressure port must be left
open to the atmosphere, which serves as the reference pressure.
All other pressure switches:
Wetted Material 1: ¼” - 18 NPT female standard
Wetted Materials 4-9: ½” - 14 NPT female standard
In addition, some models can be ordered with Option E (7/16”-20 SAE port); refer to
When installing the Pressure Switch, always:
Make sure that the unit and your system have matching threads.
Use the wrench flats provided.
Seal all joints with pipe joint sealing compound.
CAUTION
Avoid excessive torque on all threaded connections
.
WARNING
Do not exceed the marked maximum operating pressure in normal operation.
WARNING
Do not use as a safety device
The marked Proof Pressure is provided to give the maximum allowable pressure without
causing permanent damage to the pressure switch in the event of an over-pressure
condition. Set pressure relief/safety valves below this setting.
PROCESS MEDIA
Process media must be compatible with the wetted materials listed in Chapter 5 starting
on page 13. Compatibility is defined by an “A” rating in the Chemical Resistance Guide
for Metals and Alloys, the Chemical Resistance Guide for Plastics, and the Chemical
Resistance Guide for Elastomers, all published by Compass Publications, and available
from the National Association of Corrosion Engineers (NACE), Houston, Texas;
telephone 281 228 6200.