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2625, 2625SST, and 2625NS Volume Booster
September 2022
Table 2. Maximum Flow Coefficients
PORT SIZE COMBINATIONS
Supply Port
mm
9.5
12.7
FIELDVUE
™
DVC6200, DVC6200 SIS, DVC6200f, DVC6200p, DVC6000, DVC6000 SIS,
DVC6000f digital valve controllers
FIELDVUE DVC2000 digital valve controller
Low Pressure Relay
High Pressure Relay
Fisher 3570 valve positioner
Fisher 3582 valve positioner
Fisher 3610J, 3610JP, 3611JP, 3620J, 3620JP, 3621JP valve positioner
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.
NOTICE
Do not use sealing tape on pneumatic connections. This instrument contains small passages that may become obstructed
by detached sealing tape. Thread sealant paste should be used to seal and lubricate pneumatic threaded connections.
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 3 for typical installation
examples. A 67D, 67DR, or MR95H 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 MR95H regulator.
4
Exhaust Port
Inch
mm
2.4
0.375
9.5
12.7
2.4
0.5
9.5
12.7
SUPPLY PORT COEFFICIENTS
Inch
C
v
0.094
3.74
0.375
3.74
0.5
3.74
0.094
4.98
0.375
4.98
0.5
4.98
0.37
0.13
0.19
0.25
0.17
0.37
Instruction Manual
D100348X012
EXHAUST PORT COEFFICIENTS
C
v
0.23
2.29
3.40
0.24
2.30
3.40
0.31
0.15
0.20
0.25
0.19
0.30
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