Data Sheet

GX Control Valve and Actuator
D103171X012
Product Bulletin
51.1:GX
March 2012
14
Figure 12. GX Cavitrol III Trim
GX Cavitrol III for D N25
(NPS 1) through DN50
(NPS 2)
Cavitrol III trim lowers hydrodynamic noise and
reduces vibration by utilizing proprietary drilled hole
shape and spacing to shift the frequency and isolate
the cavitation in order to prevent damage. Cavitrol III
1stage technology is used without altering the
integral GX bonnet design.
Features
 Max deltaPof400psid
 Flow down
 Class V shutoff — standard
Available Sizes
 NPS1,225Actuator,20mmtravel
 NPS 1-1/2, 750 Actuator, 20mm travel
 NPS2,750Actuator,20mmtravel
Requirements
 Minimum 4 bar supply pressure
 Only available with standard bonnet
Table 8. Materials of Construction for Cavitrol III Trim
Part Material
Stem S20910
Plug S31603 / CoCr-A Seat and Guide
Seat Ring / Cage S17400
Figure 13. GX Whisper Trim III
GX Whisper Trim III for
DN80 (NPS 3) through
DN150 (NPS 6)
Whisper Trim III A1 lowers aerodynamic valve noise by
utilizing multiple orifices of special shape, size, and
spacing. These orifices break up turbulent
compressible fluid streams and shift the acoustic
energy to a higher frequency range. The result is about
20 dBA noise attenuation.
Features
 Flow up
 Class IV shutoff
Available Sizes
 NPS 3, 750 Actuator, 40mm travel
 NPS 4, 750 Actuator, 40mm travel
 NPS 6, 1200 Actuator, 60mm travel
Table 9. Materials of Construction
for Whisper Trim III
(1)
Part Material
Stem S20910
Plug S31603 / CoCr-A Seat
Seat Ring S31603 / CoCr-A Seat and Guide
Cage
(1)
CF3M
1. NPS 6 uses a separate cage, not integral to the plug stem.
Allowable temperature rangesareshownintable7.