APTech Series VS1000 - Manual (Page 7)

VS1000 Manual P/N 00-15000009 Rev 0
Page 7 of 8
5. OPERATION
This section describes operation of the equipment.
5.1. VS1000 Pressure Adjustment
WARNING: If steam is being supplied to the regulator, then use appropriate protection from heat sources.
It is recommended that the pressure be adjusted with steam heating the process fluid under flowing
conditions. This will prevent liquid from condensing in the low-pressure delivery line.
Apply supply pressure to the VS1000.
Remove the acorn nut from the stem.
The outlet pressure is adjusted by rotating the stem with a 5/32 inch hex key. Turning the stem
clockwise will increase the outlet pressure. Turning the stem counterclockwise, while a
downstream vent valve is open, will decrease the outlet pressure. Final adjustment should be
made while fluid is flowing and in the clockwise direction to obtain the most accurate set point.
Once the outlet pressure has been set, reinstall the acorn nut and tighten acorn nut against cap to
prevent inadvertent adjustment.