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 SR8 Instruction
Manual, D103100X012.
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
PRODUCT SIZE
CATEGORIES FLUID TYPE
DN 15, 20 and 25 / NPS 1/2, 3/4 and 1
SEP
1
DN 40 x 25, 40 and 50 /
NPS 1-1/2 x 1, 1-1/2 and 2
I
DN 80 / NPS 3
II
Specifications
Body Size, Inlet and Outlet Connection Style
DN 15, 20, 25, 40, 50 and 80 /
NPS 1/2, 3/4, 1, 1-1/2, 2 and 3
End Connection
(4)
Tri-Clamp
®
Sanitary connections
Maximum Operating Pressures
(1)(3)
See Table 1
Set Pressure Ranges
See Table 2
Maximum Differential Pressures
(1)
See Table 3
Pressure-Loaded Spring Case Option
Maximum Loading Pressure
DN 15 through 40 / NPS 1/2 through 1-1/2 body:
8.62 bar / 125 psig
DN 50 and 80 / NPS 2 and 3 body:
4.14 bar / 60 psig
1/4 NPT tapped vent connection
Vacuum Protection Option
Maximum Vacuum Pressure
0.96 bar / 14 psig (vacuum)
Proof Test Pressure
All Pressure Retaining Components have been
proof tested per Directive
Temperature Capabilities
(1)
See Table 4
Installation
!
WARNING
Only qualified personnel should install
or service a backpressure regulator.
Backpressure regulators should be
installed, operated and maintained
in accordance with international and
applicable codes and regulations and
Emerson Process Management Regulator
Technologies Inc. instructions.
If the regulator vents fluid or a leak
develops in the system, it indicates that
service is required. Failure to take the
regulator out of service immediately may
create a hazardous condition.
Personal injury, equipment damage
or leakage due to escaping fluid or
bursting of pressure-containing parts
may result if this 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
service conditions from exceeding limits.
Additionally, physical damage to the
backpressure regulator could result in
personal injury and property damage due
to escaping fluid. To avoid such injury and
damage, install the backpressure regulator
in a safe location.
Clean out all pipelines before installation of the
backpressure regulator and check to be sure the valve
has not been damaged or has collected foreign material
during shipping. Use suitable line gaskets and approved
piping and bolting practices. Install the backpressure
regulator in desired position. However, to ensure self-
draining (from inlet to outlet) the valve should be installed
with the spring case in the upright vertical position. The
arrow on the body indicates flow direction.
Tri-Clamp
®
is a mark owned by Tri-Clover Incorporated.
1. The pressure/temperature limits in this installation guide and any applicable standard or code limitation should not be exceeded.
2. Maximum pressure to prevent damage to internal parts and leakage to atmosphere.
3. End connection clamps and gaskets to be supplied by the user.
Type SR8
Installation Guide
D103100X014
English – September 2015
