SUMMARY
Introduction ........................................................................ 1
SEP Statement .................................................................. 1
P.E.D. Categories and Fluid Group ................................... 2
Characteristics ................................................................... 2
Labelling ............................................................................ 2
Overpressure Protection .................................................... 3
Transport and Handling ..................................................... 3
Atex Requirements ............................................................ 3
Operation ........................................................................... 3
Dimensions and Weights ................................................... 4
Installation ......................................................................... 5
Startup ............................................................................... 5
Setting ............................................................................... 5
Shutdown ........................................................................... 6
Periodical Checks .............................................................. 6
Maintenance ...................................................................... 6
Spare Parts ........................................................................ 7
Troubleshooting .................................................................
7
Parts Lists .......................................................................... 8
Schematic Assemblies ....................................................... 9
INTRODUCTION
Scope of Manual
This manual provides instructions for installation, startup,
maintenance and spare parts ordering for the V Series
spring-loaded relief valves.
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.
SEP STATEMENT
Emerson Process Management declares this product (V/50
and V/20-2) conforms to Pressure Equipment Directive
(PED) 97/23/EC Article 3 section 3 and was designed
and manufactured in accordance with sound engineering
practice (SEP).
Per Article 3 section 3, this “SEP” product must not bear the
CE marking.
Product Description
The V Series are spring-loaded automatic type relief valves.
They are used in reduction, distribution and conveying
stations using suitably ltered natural gas.
They can also be used for air, propane, butane, LPG, city
gas, nitrogen, carbon dioxide.
The following versions are available:
V/50 and V/60 : for very low pressure applications
V/51 and V/61 : for low pressure applications
V/52 and V/62 : for middle pressure applications
V/20-2 : for high pressure applications
All standard gas pressure devices (relief valves) used
in assemblies will comply to EN 12186 and EN 12279
standards.
Relief Valves
Figure 1. Relief Valves V/50, V/60 Series and Type V/20-2
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