Emerson FISHER SR8 User manual

Introduction
This installation guide provides instructions for
installation, startup and adjustment. To receive a
copy of the instruction manual, contact your local
Sales Ofce or view a copy at www.sher.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
Bulletin: D103053X012.
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
Specications
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 qualied 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 uid 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 uid 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 Specications 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 uid. 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 ow 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

Table 1. Maximum Operating Pressures
BODY SIZE MAXIMUM TEMPERATURE MAXIMUM INLET PRESSURE MAXIMUM OUTLET PRESSURE
DN NPS °C °F bar psig bar psig
15, 20, 25 and 40 1/2, 3/4, 1 and 1-1/2
65 150 14.5 210 14.5 210
135 275 12.4 180 12.4 180
204 400 11 160 11 160
50 and 80 2 and 3
65 150 10.3 150 10.3 150
135 275 8.62 125 8.62 125
204 400 7.58 110 7.58 110
Table 2. Set Pressure Ranges and Control Spring Data
BODY SIZE SET PRESSURE RANGE COLOR
DN NPS bar psig
15, 20 1/2, 3/4
0.2 to 0.5(1) 2 to 8(1) Blue
0.4 to 1.7 5 to 25 Silver
0.7 to 3.4 10 to 50 Green
2.4 to 6.9 35 to 100 Red
5.2 to 8.6 75 to 125 Red
Yellow
25, 40 full port
40 x 25
1, 1-1/2 full port
1-1/2 x 1
0.2 to 0.5(1) 2 to 8(1) Blue
0.4 to 1.7 5 to 25 Silver
1.0 to 4.8 15 to 70 Green
1.7 to 6.2 25 to 90 Red
2.4 to 6.9 35 to 100 Green
Yellow
5.2 to 8.6 75 to 125 Red
Yellow
50 and 80 2 and 3
0.7 to 1.7 10 to 25 Silver
1.0 to 3.4 15 to 50 Green
1.7 to 4.1 25 to 60 Red
1. The 0.14 to 0.55 bar / 2 to 8 psig spring is not available with the metal diaphragm.
Note
It is important that the backpressure
regulator be installed so that the vent
hole in the spring case is unobstructed
at all times.
Overpressure Protection
The recommended pressure limitations are stamped
on the nameplate. Fisher™ backpressure regulators
are NOT ASME safety backpressure regulators.
The valve should be inspected for damage after
any overpressure condition.
Startup
The backpressure regulator is factory set at
approximately the midpoint of the spring range or the
set pressure requested, so an initial adjustment may
be required to give the desired results. With proper
installation completed, slowly open the upstream and
downstream shutoff valves.
Adjustment
To change the pressure setting, remove the closing
cap or loosen the locknut and turn the adjusting
screw or handwheel clockwise to increase pressure
or counterclockwise to decrease pressure. Monitor
the pressure with a test gauge during the adjustment.
Replace the closing cap or tighten the locknut to
maintain the desired setting.
Pressure-Loaded Construction
The spring case can be pressure loaded to adjust
set pressure. An optional tapped spring case, guide
ring seal and sealing washer on the adjusting screw
must be used for these applications. The loading
pressure is connected to the 1/4 NPT connection in
the spring case allowing registration on the spring
side of the diaphragm. Adjusting loading pressure
will proportionally change the pressure setting of the
regulator. A small amount of mechanical spring load,
in addition to the pressure load, is recommended.
Regulator set pressure achieved from the combination
of spring load and pressure load should not exceed
the set pressure ranges listed on Table 2.
Taking Out of Service (Shutdown)
!
WARNING
To avoid personal injury resulting from
sudden release of pressure, isolate
the backpressure regulator from all
pressure before attempting disassembly.
Relieve all spring compression and
isolate regulator from the pressurized
system prior to removing the clamp
(key 15, Figure 1).
Type SR8
2

BODY SIZE OUTLET PRESSURE RANGE COLOR MAXIMUM DIFFERENTIAL PRESSURE
DN NPS bar psig bar d psid
15, 20 1/2, 3/4
0.2 to 0.5 2 to 8 Blue 1.0 15
0.4 to 1.7 5 to 25 Silver 2.7 40
0.7 to 3.4 10 to 50 Green 6.9 100
2.4 to 6.9 35 to 100 Red 9.6 140
5.2 to 8.6 75 to 125 Red/Yellow 11 160
25, 40 full port
40 x 25
1, 1-1/2 full port
1-1/2 x 1
0.2 to 0.5 2 to 8 Blue 1.0 15
0.4 to 1.7 5 to 25 Silver 2.7 40
1.0 to 4.8 15 to 70 Green 6.9 100
1.7 to 6.2 25 to 90 Red 8.6 125
2.4 to 6.9 35 to 100 Green/Yellow 9.6 140
5.2 to 8.6 75 to 125 Red/Yellow 11 160
50 and 80 2 and 3
0.7 to 1.7 10 to 25 Silver 3.4 50
1.0 to 3.4 15 to 50 Green 5.2 75
1.7 to 4.1 25 to 60 Red 5.2 75
Table 3. Maximum Differential Pressures
Table 4. Temperature Capabilities
SEAT TYPE DIAPHRAGM MATERIAL O-RING MATERIAL TEMPERATURE RANGE
°C °F
Metal
(Stainless Steel)
Ethylene Propylene (EPDM) EPDM -28 to 135 -20 to 275
SST Polytetrauoroethylene (PTFE)/Fluorocarbon (FKM)(1) -6 to 204 20 to 400
PTFE/Fluorocarbon (FKM) PTFE/Fluorocarbon (FKM) -6 to 204 20 to 400
Soft
(PTFE/Stainless Steel)
EPDM EPDM -28 to 65 -20 to 150
SST PTFE/Fluorocarbon (FKM)(1) -6 to 65 20 to 150
PTFE/Fluorocarbon (FKM) PTFE/Fluorocarbon (FKM) -6 to 65 20 to 150
Soft
(Polyether Ether Ketone
(PEEK)/Stainless Steel)
EPDM EPDM -28 to 135 -20 to 275
SST PTFE/Fluorocarbon (FKM)(1) -6 to 204 20 to 400
PTFE/Fluorocarbon (FKM) PTFE/Fluorocarbon (FKM) -6 to 204 20 to 400
1. O-ring material is PTFE for the DN 15 and 20 / NPS 1/2 and 3/4 sizes. Temperature range is the same.
STANDARD BACKPRESSURE REGULATOR
WITH ELASTOMERIC DIAPHRAGM
19
18
17
L
11
12
14
13
16
24
23
15
8
9
5
7
3
2
1
S1
T-HANDLE OPTION
18
22
VACUUM PROTECTION OPTION
7310 4
8
9
Figure 1. Type SR8 Sanitary Regulator Assembly Drawing
APPLY LUBRICANT (L) AND SEALANT (S)(1):
L = ANTI-SEIZE LUBRICANT
S1 = THREADLOCKER MEDIUM/HIGH STRENGTH SEALANT
1. Lubricant and sealant must be selected such that they meet the temperature requirements.
Type SR8
3

Figure 1. Type SR8 Sanitary Regulator
Assembly Drawing (continued)
APPLY SEALANT (S)(1):
S2 = HIGH TEMPERATURE AND MEDIUM STRENGTH THREADLOCKER SEALANT
1. Lubricant and sealant must be selected such that they meet the temperature requirements.
VIEW B – METAL DIAPHRAGM STANDARD REGULATOR
SOFT SEAT OPTION
26S2
28
27
15
14
9
6
6
1
7
Parts List
Key Description
1 Body
2 Plug (metal seat)
3 Plug O-ring
4 Diaphragm Plate O-ring
5 Piston Ring
6 Diaphragm Gasket
7 Diaphragm
8 Lower Spring Seat
9 Guide Ring
10 Diaphragm Plate
11 Upper Spring Seat
12 Spring
13 Spring
14 Spring Case
15 Bolted Clamp
16 Hex Nut
17 Hex Nut
18 Adjusting Screw
19 Closing Cap
20 Flow Arrow (not shown)
21 Nameplate (not shown)
22 Locking Lever
23 Flat Washer
24 Lock Washer
25 Sealing Washer
26 Upper Plug
27 Lower Plug
28 Soft Seat
29 Drive Screw (not shown)
32 Guide Ring Seal
Type SR8
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Emerson Automation Solutions
For further information on the current
PED revision see Bulletin: D103053X012
or scan the QR code.
Fisher.com
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McKinney, Texas 75070 USA
T [phone]
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D103100X014 © 2004, 2019 Emerson Process Management Regulator
Technologies, Inc. All rights reserved. 03/19.
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Electric Co. All other marks are the property of their prospective owners.
Fisher™ is a mark owned by Fisher Controls International LLC, a
business of Emerson Automation Solutions.
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not to be construed as warranties or guarantees, express or implied,
regarding the products or services described herein or their use or
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are available on request. We reserve the right to modify or improve the
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Emerson Process Management Regulator Technologies, Inc. product
remains solely with the purchaser.