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STI S.r.l.
– Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com
Manual 2071, rev.07 02/2019
– BV
3
2
DEVICE DESCRIPTION
The Big Volume Booster BV is a flow amplifier that allows to reduce the working time of an actuator by
increasing the air mass flow to the cylinder or by reducing the air mass flow from the same cylinder. Designed
to meet high control applications, STI series BV relay produces a high volume boosting action. The volume
booster contains an integral stabilizing bypass valve (or valve shutter) controlled by a screwdriver adjustment
in the body: opening this valve improves the stability of the positioner/volume booster/actuator.
Figure 1
– Big Volume Booster BV
BYPASS VALVE or
VALVE SHUTTER
