Before installation, these instructions must be carefully read and understood.
CROSBY J SERIES PRESSURE RELIEF VALVE WITH FISHER™ 4320 WIRELESS POSITION MONITOR
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Emerson.com/FinalControl © 2019 Emerson. All rights reserved. VCIOM-11681-EN 19/03
TABLE OF CONTENTS
1. Introduction ...................................................1
1.1 General .....................................................1
1.2 Scope ........................................................ 1
1.3 Safety Precautions ..................................2
2. Calibration Procedure ...................................2
2.1 Magnetic sensor size selection ..............2
2.2 Calibration ...............................................3
3. Mounting Fisher 4320 to the
J- Series Valve ...............................................6
3.1 Installation ...............................................6
3.2 Bracket Kits .............................................7
4. Selection Tables .............................................. 8
1 INTRODUCTION
1.1 General
NOTICE
Refer to Fisher 4320 wireless position monitor
instruction manual for any difficulties with device
or calibration.
The Fisher 4320 Wireless Position Monitor is
used to monitor the lift of a Crosby J Series
Bellows Pressure Relief Valve. This data can be
wirelessly transmitted to a control station.
The Fisher 4320 wireless position monitor is
a true linkage-less non-contacting wireless
position transmitter and limit switch. It is a
rugged measurement device that provides a
precise wireless feedback signal to indicate
equipment position with a percent (%) of span
plus on/off indication. It is designed to be
simple to use, compact, and easily mounted.
The wireless position monitor periodically
reads the position of a measured device and
transmits that data over a wireless network.
1.2 Scope
Calibration of 4320 could be performed before
mounting to the Pressure Relief Valve by
using a calibration device that simulates the
mounting of the 4320 and the magnet sensor,
one can easily calibrate the 4320 by moving
the magnetic sensor. For the large T orifice
JLT-JBS-E, requires a calibration device
simulator due to the length of stroke.
Calibration could be also performed during
mounting to the pressure relief valve by using
calibration plate Emerson provides. This
procedure provides the calibration methods
during mounting 4320 to Crosby J Series
Bellows Pressure relief valve only.
WARNING
The Crosby J Series valve must have a bellows
when using this position monitor.
Avoid personal injury from sudden release of
process pressure.
Failure to do so may result in injury to personnel
or cause damage to the equipment.
1.3 Safety Precautions
The protection and safety of equipment,
property and personnel depends on the
proper operation of the pressure relief
valves described in this manual. All Emerson
pressure relief valves should be kept in proper
working condition in accordance with the
manufacturer’s written instructions. Periodic
testing and maintenance by the user of this
equipment is essential for reliable and safe
valve operation.
All installation, maintenance, adjustment,
repair and testing performed on pressure
relief valves should be done by qualified
technicians having the necessary skills and
training adequate to perform such work. All
applicable Codes and Standards, governing
regulations and authorities should be adhered
to when performing pressure relief valve
repair. No repair, assembly, adjustment or
testing performed by other than Emerson or
its authorized assemblers and representatives
shall be covered by the warranty extended by
Emerson to its customers. The user should use
only original, factory supplied OEM parts in any
maintenance or repair activity involving this
product.
SAFETY FIRST
To reduce the risk during installation:
• Comply with all information on the product, in
this manual, and in any local and national codes
that apply to this product.
• Do not allow untrained personnel to work with
his product.
• Use Emerson parts and work procedures
specified in this manual.
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