VS18/VS26
MAINTENANCE & INSTRUCTION BOOKLET
5.1.6 Internal/external pilot air supply
The position of the gasket between valve body and pilot valve defines and indicates pilot air
supply. Conversion between internal and external pilot supply occurs by flipping the red gasket.
Internal pilot air supply (fig. 1):
from port 1
External pilot air supply (fig. 2):
from port 12/14
In any case pilot exhaust air is collected and exhausted via port 82/84.
Figure 1
Figure 2
Solenoid 12
Solenoid 12
Solenoid 14
Solenoid 14
Such conversion in the field should occur only when minimum operating pressure is not
available at port 1. In these applications, the minimum operating pressure (or higher) is required
at port 12/14 on the end plate.
Note:
After flipping the gasket, data on the valve label (symbol and part number) are no longer
accurate. Furthermore, when changing valves or accessories (valve function, sandwich plate,
etc.) on a valve island, the part number on the label will no longer correspond to the
configuration. If you order the valve island based on the Norgren part number, the original
configuration will be delivered.
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