Instruction Manual
D100348X012
2625 and 2625NS Volume Booster
January 2015
4
Table 2. Maximum Flow Coefficients
PORT SIZE COMBINATIONS
SUPPLY PORT COEFFICIENTS
EXHAUST PORT COEFFICIENTS
Supply Port
Exhaust Port
mm
Inch
mm
Inch
C
v
C
v
9.5
0.375
2.4
9.5
12.7
0.094
0.375
0.5
3.74
3.74
3.74
0.23
2.29
3.40
12.7
0.5
2.4
9.5
12.7
0.094
0.375
0.5
4.98
4.98
4.98
0.24
2.30
3.40
FIELDVUE™ DVC6200, DVC6200 SIS, DVC6200f, DVC6200p, DVC6000, DVC6000 SIS,
DVC6000f digital valve controllers
0.37
0.31
FIELDVUE DVC2000 digital valve controller
Low Pressure Relay
High Pressure Relay
0.13
0.19
0.15
0.20
Fisher 3570 valve positioner
0.25
0.25
Fisher 3582 valve positioner
0.17
0.19
Fisher 3610J, 3610JP, 3611JP, 3620J, 3620JP, 3621JP valve positioner
0.37
0.30
Installation
WARNING
Always wear protective clothing, gloves, and eyewear when performing any maintenance procedures to avoid personal
injury.
System damage may result if a volume booster is installed in a way that it can be physically damaged.
Personal injury or system damage may result when service conditions exceed booster or other equipment ratings.
Exceeding the pressure specifications in table 1 may cause leakage, parts damage, or personal injury due to bursting of
pressure‐containing parts or explosion of accumulated gas.
Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
Note
Do not use separate pressure supplies for the volume booster and associated positioner.
The volume booster may not exhaust immediately upon loss of a separate pressure supply. However, if the system is in a transient
state at the time of pressure supply loss or if changes to the booster's input signal are sufficient to overcome the deadband, the
booster will exhaust.
A loss of a pressure supply (either separate or common) to a 3582 or 3610J positioner will cause the positioners output pressure
(booster's input pressure) to decay.
Always pipe the positioner and the volume booster with one common supply. See figure 2 for typical installation
examples. A 67D, 67DR, or 95H regulator is required to provide sufficient capacity to supply both components. A
high‐capacity filter, such as the 262K, should be installed in the supply line to the 67D, 67DR, or 95H regulator.
Mounting
The volume booster is typically nipple‐mounted between the pneumatic supply source and the actuator, and may be
used with piston or diaphragm actuators. Many actuators require larger casing or cylinder connections and
modifications to allow the booster to deliver the higher volume output.
