Instruction Manual
D100348X012
2625 and 2625NS Volume Booster
January 2015
6
Figure 3. Volume Booster Sectional View
INPUT SIGNAL
BYPASS RESTRICTION
ADJUSTING SCREW
BYPASS RESTRICTION
(KEY 11)
SUPPLY PORT
OUTPUT TO ACTUATOR
SUPPLY
EXHAUST
EXHAUST PORT
DIAPHRAGMS
(KEY 5 AND 6)
W0679‐1
Diagnostic Connections
To support diagnostic testing of valve/actuator/positioner packages, install connectors and hardware between the
2625 or 2625NS volume booster and the actuator. Typical connector installations are shown in figure 2.
The hardware used includes a 3/4 NPT pipe nipple, pipe tee, and pipe bushings with an 1/8 NPT pipe bushing for the
connector. The connector consists of an 1/8 NPT body and body protector.
See separate instructions for diagnostic connections to the positioner.
Supply Pressure
Supply pressure must be clean dry air or noncorrosive gas, and it should be filtered.
CAUTION
Use a clean, dry, oil‐free air supply with instruments containing EPDM components. EPDM is subject to degradation when
exposed to petroleum based lubricants.
