PRX Series
Instruction Manual
D103591X012
January 2016 - Rev. 00
SUMMARY
Introduction ......................................................................... 1
Characteristics .................................................................... 1
Labelling ............................................................................. 2
Dimensions and Weights .................................................... 2
Installation .......................................................................... 2
Startup ................................................................................ 2
Adjustment ......................................................................... 2
Periodic Checks.................................................................. 2
SEP Statement .................................................................. 3
ATEX Requirements .......................................................... 3
Maintenance ....................................................................... 3
Spare Parts ........................................................................ 4
Parts Lists ........................................................................... 5
Schematic Assemblies........................................................ 6
INTRODUCTION
Scope of Manual
This manual provides installation, startup, maintenance and
spare parts for the pilot PRX series.
Product Description
Designed for pressure regulators and slam-shut valves
control, the following types are available:
• PRX/120, PRX-AP/120
To control regulator or monitor
• PRX/125, PRX-AP/125
To control operating monitor
• PRX/181-PN, PRX/182-PN,
PRXAP/181-PN, PRXAP/182-PN
To control OS/80X-PN slam-shut device
• PRX/131, PRX-AP/131
Booster valve
• PRX/182, PRX-AP/182
To control VSFL relief valve
The full range of PRX pilots can be installed in the
following equipment:
FL Series - Cronos Series - EZH Series - 971 Model
BM5 Series - BM6X Series
This product has been designed to be used with fuel gases of
1st and 2nd family according to EN 437, and with other non
aggressive and non fuel gases. For any other gases, other
than natural gas, please contact your local sales agent.
CHARACTERISTICS
Table 1. Technical Features
MODEL
ALLOWABLE
PRESSURE
PS (bar)
SET RANGE
W
d
(bar)
BODY AND
COVERS
MATERIAL
PRX/120, PRX/125
100
1 – 40
Steel
PRX-AP/120, PRX-AP/125 30 – 80
PRX/181-PN, PRX/182-PN,
PRX/131, PRX/182,
0.5 – 40
PRX-AP/181-PN, PRX-AP/182-PN,
PRX-AP/131, PRX-AP/182,
30 – 80
1/4-inch NPT female threaded connections.
The Type SA/2 stabilizer lter must be used with PRX series
pilots, for further informations please see the Instruction
Manual D103653X012.
PRX/ and PRX-AP/ Pilots
Figure 1. Type PRX/120 and PRX-AP/120 Pilots
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