Type B/240
Instruction Manual
0047EN-B240-IM
September 2010 - Rev. 01
SUMMARY
Introduction ........................................................................ 1
P.E.D. Categories and Fluid Group ................................... 2
Characteristics ................................................................... 2
Labelling ............................................................................ 2
Overpressure Protection .................................................... 3
Transport and Handling ..................................................... 3
Atex Requirements ............................................................ 3
Slam-Shut Controller ......................................................... 3
Dimensions and Weights ................................................... 4
Operation ........................................................................... 5
Installation ......................................................................... 6
Startup ............................................................................... 6
Adjustment ......................................................................... 7
Shutdown ........................................................................... 7
Periodical Checks .............................................................. 7
Maintenance ...................................................................... 7
Spare Parts ........................................................................ 8
Troubleshooting ................................................................. 8
Parts List ............................................................................ 9
INTRODUCTION
Scope of Manual
This manual provides instructions for installation, startup,
maintenance and spare parts ordering for the B/240 series
spring loaded regulators.
Product Description
The B/240 series regulators are spring loaded single seated,
whit counterbalanced valve disc.
They are usually supplied with safety valve and built in
lter and can be also provided with slam-shut controller for
minimum pressure, maximum pressure or minimum and
maximum downstream pressure.
The regulators of the B/240 series due to their operating
specications are mainly used in those system where
sudden capacity variations are required, or else, where the
cut-off of the gas distribution is controlled by solenoid valve,
such as for the feeding of burners.
Figure 1. Regulator Type B/249
They can be used with natural gas, and other not aggressive
gases.
The following versions are available:
B/242 • B242-AP: Regulator
B/249 • B249-AP: Regulator with slam-shut
Versions without relief valve available on request
Tightness cover versions available on request (e.g. B/249-D).
The standard gas pressure devices (regulators and safety
shut-off devices) are those used in the assemblies dealt with
into EN 12186 and EN 12279 and their use has to be under
the provisions into ENs 12186 & 12279.
Fail-to-open stand-alone regulators cannot be used as
a safety accessory according PED 97/23/EC to protect
downstream pressure equipment.
In the pressure regulators (with or without built-in safety
shut-off devices) manufactured by Emerson Process
Management shall be used additionary pressure accessories
(e.g. pilots or lters) manufactured and labeled by Emerson
Process Management.
Emerson Process Management will be not responsible
for any possible inefciency due to installation of not own
production additionary pressure accessories (e.g. pilots or
lters).
When pressure containing parts of possible built-in safety
shut-off device (SSD) valve and pilot have different
maximum allowable pressures, the SSD is differential
strength type.
B/240 Series Spring Loaded Pressure Regulators
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