GENERAL DESCRIPTION The Omega PRG-501 and PRG501 Series Pressure Regulators have an advanced design consisting of a precision measurement capsule and a high gain servo amplifier to achieve high performance. The regulator can be used in a ‘dead end’ application and will exhaust whenever the setpoint is lowered. Changes in supply pressure have a minimal effect on the regulation accuracy. The regulator can be panel or pipe mounted. These regulators are unaffected by vibration and mounting position.
BASIC MECHANISM The units use a piston to control a high gain pneumatic two-stage servo system. When increasing the regulated pressure the handwheel is turned clockwise, forcing the measuring capsule/piston assembly downward. This pushes the pilot diaphragm and control diaphragm downward. As a result, the main valve opens and the supply pressure enters the regulator. The resulting pressure change causes the measuring capsule to compress.
INSTALLATION Mounting The PRG101 is usually panel mounted into a minimum 11.5mm hole. Direct pipe mounting is also possible. To install on a panel remove the knob (grub screw) tension nut and mounting nut. Insert into the panel and replace the nuts and knob. The mounting nut should be retightened to a torque of 5Nm; set the tension nut to give adequate friction for the desired service.
DIMENSION DETAILS M a x . p re s s u re s to p lo c k n u ts T e n s io n n u t 4 3 .5 R E F L o c knut fo r m o u n tin g B le e d s c re w E xhaus t s lo ts 69 REF O u tle t p o rt I n le t p o rt 1 3 .
M1846-09/02
