Emerson FISHER LR128 Installation Manual

Installation Guide
D103578X014
English – June 2021
Introduction
This installation guide provides instructions for installation,
startup and adjustment. To receive a copy of the
instruction manual, contact your local Sales Office or view
a copy at www.fisher.com. For further information refer
to: Type LR128 Instruction Manual, D103578X012.
PED Categories
This product may be used as a pressure accessory with
pressure equipment in the following Pressure Equipment
Directive categories. It may also be used outside of the
Pressure Equipment Directive using sound engineering
practice (SEP) per table below. For information on the
current PED revision see Bulletin: D103053X012.
PRODUCT SIZE
DN 25 and 50 / 1 and 2 in.
DN 80 and 100 / 3 and 4 in.
Specifications
Main Valve Body Sizes, End Connection Styles and
Structural Design Ratings
See Table 1
Maximum Control Pressure
See Tables 1, 2 and 5
Minimum Set Pressure
1.7 bar / 25 psig
Set Pressure or Backpressure Control Ranges
See Table 3
Temperature Capabilities
See Table 4
Installation
▲
Only qualified personnel shall install or
service a relief valve or backpressure
regulator. Relief valve or backpressure
regulator should be installed, operated
and maintained in accordance with
international and applicable codes
and regulations and Emerson Process
Management Regulator Technologies,
Inc. instructions.
1. The pressure/temperature limits in this Installation Guide and any applicable standard or code limitation should not be exceeded.
CATEGORY FLUID TYPE
SEP Liquid
II Liquid
(1)
(1)
(1)
(1)
WARNING
If using a relief valve or backpressure
regulator on a hazardous or flammable
fluid service, personal injury and property
damage could occur due to fire or
explosion of vented fluid that may have
accumulated. To prevent such injury or
damage, provide piping or tubing to vent
the fluid to a safe, well-ventilated area or
containment vessel. Also, when venting
a hazardous fluid, the piping or tubing
should be located far enough away from
any buildings or windows so to not create
a further hazard and the vent opening
should be protected against anything that
could clog it.
Personal injury, equipment damage or
leakage due to escaping fluid or bursting
of pressure-containing parts may result
if this relief valve or backpressure
regulator is overpressured or is installed
where service conditions could exceed
the limits given in the Specifications
section or where conditions exceed
any ratings of the adjacent piping or
piping connections.
To avoid such injury or damage, provide
pressure-relieving or pressure-limiting
devices (as required by the appropriate
code, regulation or standard) to prevent
(1)
service conditions from exceeding limits.
Additionally, physical damage to the
relief valve or backpressure regulator
could result in personal injury and
property damage due to escaping fluid.
To avoid such injury and damage, install
the relief valve or backpressure regulator
in a safe location.
Clean out all pipelines before installation of the relief
valve or backpressure regulator and check to be sure
the relief valve or backpressure regulator has not been
damaged or has collected foreign material during
shipping. For NPT bodies, apply pipe compound to
the external pipe threads. For flanged bodies, use
suitable line gaskets and approved piping and bolting
practices. Install the relief valve or backpressure
regulator in any position desired, unless otherwise
specified, but be sure flow through the body is in the
direction indicated by the arrow on the body.
Type LR128