© 2017 Baker Hughes, a GE company, LLC. All rights reserved.52 | BHGECAUTION The SVI II AP High Flow digital valve positioner cannot be placed inparallel with another volume booster. Contact the factory forfurther instructions regarding configuration with boosters as wellas other non-standard configurations.CAUTION Do not use pipe thread sealant tape on pneumatic fittings. It mayshred into small particles that can cause instrument malfunction.WARNING Never exceed the actuator maximum rated supply pressure 100psi (6.9 bar, 689.7 kPa) for single acting or 150 psi (10.3 bar, 1030kPa) for double acting positioner. Damage to equipment or injuryto personnel can result.CAUTION Remove any excess pipe thread sealant from the first and secondthreads to prevent uncured sealant from entering the air lines.Single Acting PositionerThe supply and output connections for the SVI II AP (Figure 24), located on bottom of thepneumatic block, are tapped 1⁄4" NPT. Output is toward the front, supply is toward the back.Two pressure gauges, output on top, supply on bottom, are located on the front of thepneumatic block.The supply and output connections for the SVI II AP High Flow (Figure 25), located on bottomand leftside of the pneumatic block, are tapped 1⁄2" NPT.Maximum allowable air supply pressure to the SVI II AP varies according to actuator, valve size,and valve type. See Pressure Drop tables in valve specification sheets to determine the correctpositioner supply pressure. Minimum supply pressure should be 5 psi to 10 psi (.345 bar - .69bar) (34.485 - 68.97 kPa) above maximum spring range but may not exceed the rated actuatorpressure.1. Pipe the outbound air from the output pressure port (I) (arrow only for High Flow) to thevalve actuator.2. Connect air supply and actuator outputs (1⁄4" NPT or 1/2" NPT for High Flow units). Supplypressure is 20 -100 psi (1.4 - 6.9 bar) (138 - 690 kPa). Minimum tubing diameter 1⁄4" (6 mmx 4 mm).
