PS/79 and PS/80
Instruction Manual
0004EN-PS7980-IM
November 2009 - Rev.01
Type PS/79 and PS/80 Pilots
INTRODUCTION
Scope of Manual
This manual provides installation, startup, maintenance, trouble-
shooting and spare parts for the pilot series PS/79 and PS/80.
Product Description
Designed for pressure regulators control, the following types
are available:
PS/79 • - single diaphragm pilot for pilot controlled gas
pressure regulator (active or wide-open monitor)
PSO/79 • - single diaphragm pilot for setting of rst
pressure reducing step of pilot controlled gas pressure
regulator (working monitor)
REO/79 • - single diaphragm pilot for setting of downstream
pressure reducing step of pilot controlled gas pressure
regulator (working monitor)
In case of failures, these pilots with single diaphragm will
cause a fail open reaction of the regulator.
PS/80 • - double diaphragm pilot for pilot controlled gas
pressure regulator (active or wide-open monitor)
PSO/80 • - double diaphragm pilot for setting of rst
pressure reducing step of pilot controlled gas pressure
regulator (working monitor)
REO/80 • - double diaphragm pilot for setting of
downstream pressure reducing step of pilot controlled gas
pressure regulator (working monitor)
In case of failures, these pilots with double diaphragms will
cause a fail close reaction of the regulator.
RE/79 and RE/80 versions are in accordance with specic
requirements of Italian market applications.
Tightness cover version available on request (e.g. PS/79-D
and PS/80-D).
The full range of PS pilots can be installed in the following
pressure regulators:
FL Series - Cronos Series - EZH Series - 971 Model
CHARACTERISTICS
APPLICATION
ALLOWABLE
PRESSURE
PS
(bar)
SET RANGE
W
d
(bar)
BODY AND
COVERS
MATERIAL
REGULATOR
OR
MONITOR
WORKING MONITOR
REGULATOR
MONITOR
PS/79 PSO/79 REO/79
100
0.5 - 40 *
Steel
PS/80 PSO/80 REO/80 1.5 - 40 *
(*) PS/79-AP and PS/80-AP versions are available on request with a set range up to 60 bar.
Table 1. Technical features
1/4” NPT female threaded connections.
All PS/ series pilots are supplied with a filter (5µ filtering
degree) and built-in pressure stabilizer, with the exception of
pilots PSO/79 and PSO/80.
SUMMARY
Introduction ........................................................................ 1
Characteristics ................................................................... 1
Labelling ............................................................................ 2
Dimensions and Weights ................................................... 2
Installation ......................................................................... 2
Startup ............................................................................... 2
Periodic Checks ................................................................ 2
SEP Statement .................................................................. 2
ATEX Requirements .......................................................... 2
Maintenance ...................................................................... 3
Troubleshooting ................................................................. 4
Parts Lists .......................................................................... 4
Schematic Assemblies ....................................................... 6
Figure 1. Type PS/79 and PS/80 Pilots
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