Omega PRG101 - Manual (Page 3)

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. A set point locknut is provided.
The PRG101 has two ¼ NPT gauge ports available for mounting OMEGA
® pressure
gauges for local indication. The PRG501 is ideal for having a dial gauge reading when
the unit is panel mounted. The dial gauge would be external to the panel.
The PRG101 regulators are available in the following pressure ranges:
Model No.
Adjustable Range
PRG101-120 2-120 PSIG
PRG101-60 2-60 PSIG
PRG101-25 2-25 PSIG
The PRG501 regulators are available in the following pressure ranges:
Model No.
Adjustable Range
PRG501-120 2-120 PSIG
PRG501-60 2-60 PSIG
PRG501-30 2-30 PSIG
PRG501-X15 3-15 PSIG
OPERATION
The PRG101 and PRG501 are precision pressure regulators, normally used with
compressed air. The operation has been specifically designed for zero flow ‘dead end’
service, but can provide large air flows up to 5L/sec (10scfm) when required. It maintains
a highly stable outlet pressure against variation in supply pressure, flow, temperature and
vibration. These instruments use small quantities of air for operation (0.5-2 litres/minute)
and can be set to a minimum below 0.14 bar (2psi). Tight shut off is not possible.