1. INTRODUCTION
Page 5 © 1998 DH Instruments, Inc.
1.2.7 PNEUMATIC MODULE
Internal Layout
The pneumatic module is an integrated assembly that includes two inlet (fast and slow) and
two exhaust control valves and differential pressure regulators. The differential pressure
regulators use pressure feedback to maintain a constant differential pressure across the
control valves. The control valves are solenoid type actuated by 12 V.
Pneumatic Module
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