Singer PR-10159 UL Instruction Manual

TABLE OF CONTENTS PAGE
OPERATING INSTRUCTIONS MANUAL
WARNING:
1. Read and follow instructions carefully. Proper training and periodic review
regarding the use of this equipment is essential to prevent possible serious injury
and/or property damage. The instructions contained herein were developed for
using this equipment on ttings manufactured by Mueller Co. only, and may not be
applicable for any other use.
2. DO NOT exceed the pressure ratings of any components or equipment. Exceeding
the rated pressure may result in serious injury and/or property damage.
3. Safety goggles and other appropriate protective gear should be used. Failure to do
so could result in serious injury.
PR-10159
UL / ULC
Pressure
Reducing Valve
106-PR-10159
S106-PR-10159
A106-RP-10159
SA106-PR-10159
General Information / Operation 2
Installation 3-4
(S)106-PG – Single Chamber,
Hydraulically Operated Valve 5-6
106-PR Pressure Reducing Pilot 7
Parts and Dimensions 8-11
F 13902 3/19

2
PR-10159 PRESSURE REDUCING VALVE General Information / Operation
Model PR-10159 is a pilot operated
pressure reducing valve designed
to automatically reduce a high inlet
pressure to a lower outlet pressure.
The valve will maintain a relatively
steady downstream pressure
regardless of fluctuations in the
supply pressure or flow rate.
Maximum Pressure
– For sizes up to and including
4", maximum inlet pressure is
300 psig.
– For the 6" and 8" sizes, the
maximum inlet pressure is
300 psig.
– The outlet pressure setting range
for all sizes is 30-165 psig and
shall not exceed 175 psig.
NOTE: With any manufactured
product there is a risk of
malfunction in service, whether
by operating conditions such as a
plugged strainer or normal wear
and tear. We recommend regular
maintenance with frequency to
suit the importance to customer's
application. We draw attention
to our warranty which limits
our responsibility to defects in
workmanship and materials
only. Visit singervalve.com for
warranty details.
OVERVIEW
Fixed Restriction and Flow Stabilizer,
pressurizing the bonnet and closing
Main Valve.
Low Downstream Pressure
When flow is required, and
downstream pressure is lower than
the setting of Pilot, the pilot opens.
Flow in the pilot circuit is greater
from the bonnet to downstream.
The bonnet therefore depressurizes,
opening Main Valve.
At zero flow conditions, the
maximum increase in downstream
pressure will be within 10% of the
set pressure or will not exceed
7 psi.
Model PR-10159 reacts to changes
in downstream pressure via Pilot.
Since the capacity of Pilot is much
larger than that of Fixed Restriction,
the state of the pilot (open or
closed) determines whether the
Main Valve is open or closed. Refer
to Model 106-PG 'Operation' for
more details.
High Downstream Pressure
When there is no demand (and
the downstream pressure is at, or
higher than the setting of Pressure
Reducing Pilot), Pilot closes.
Flow through the pilot circuit is
then directed to the bonnet through
Modulating
Under flowing conditions below the
set point of Pilot, the pilot reacts
to small changes in downstream
pressure and modulates the bonnet
pressure (and Main Valve position)
as required to keep the downstream
pressure constant.
The speed of opening and closing
of the main valve depends on the
setting of Model 26 Flow Stabilizer.
Refer to Model 26 instructions for
details and adjustment.
OPERATION
Strainer
Pilot
Fixed
Restriction

3
PR-10159 PRESSURE REDUCING VALVE
Installation
4. Refer to (S)106-PG 'Installation'
for other installation requirements.
5. Installation with loosely held
piping and/or elbows close to the
valve may cause the valve
to pulsate.
NOTE: For a valve intended for use
in sprinkler systems, as indicated
by NFPA 13:
A relief valve at least 1/2" (13 mm)
in size with adequate drainage is
to be installed on the downstream
side of this valve. The relief valve
must be set above the "lock-up" or
"zero flow" shutoff pressure which
is approximately between 4 to
10 psi higher than set pressure.
Installation is to be done in
accordance with NFPA 13, the
Standard for Installation of Sprinkler
Systems, or NFPA 14, the Standard
for Installation of Standpipe and
Hose Systems, as applicable.
1. Model S106-PR-10159 shall be
installed on systems not exceeding
the valve end configurations
working capabilities.
2. Pressure gauges MUST be
installed on the inlet and outlet
piping of the valve.
3. If valve is for use with Standpipe
and Hose Systems, refer to
NFPA 14 for minimum
installation requirements.
Adjustment
1. Open Isolating Valves (2), (5) and
(7) (if so equipped).
2. Crack outlet stop valve and
slowly open inlet stop valve wide.
3. Bleed air from Main Valve bonnet.
See (S)106-PG 'Installation'.
4. Open outlet stop valve wide.
5. Set reduced (downstream)
pressure by turning Pilot (6) adjusting
screw: To increase pressure, turn
adjusting screw clockwise.
- To reduce pressure, turn adjusting
screw counter-clockwise.
NOTE: There must be flow through
the valve when pressure is adjusted.
6. If the valve does not open
(pressure remains low), check the
adjustment of Pressure Reducing
Pilot (6).
7. If the valve begins to oscillate
or hunt, bleed air from Main Valve
bonnet. See (S)106-PG 'Installation'.
INSTALLATION AND ADJUSTING PROCEDURE
Tubing Option: Copper.
PARTS LIST
Dwg
by
Apvd
by
Dwg
date
Description
Dwg No.
Rev
Series/Model No.
Flow
Opposite Side
Flow
Standard Side
PS
PS
PS=6"/150mm
PROPRIETARY AND CONFIDENTIAL
THE DRAWING AND THE INFORMATION HEREIN IS THE EXCLUSIVE PROPERTY OF MUELLER S.V. AND IS
NOT TO BE REPRODUCED IN WHOLE OR PART, OR USED TO MANUFACTURE FOR USE OR SALE BY ANY
OTHER PERSON WITHOUT THE WRITTEN PERMISSION OF MUELLER S.V. THIS DRAWING REMAINS THE
PROPERTY OF MUELLER S.V. AND MUST BE RETURNED ONCE ITS PURPOSE HAS BEEN SERVED.
PR-10159
Pressure Reducing Valve
for Fire Service
M.Li
07/26/17
A-10159A
A
X
DIAGRAM 1. CONTROL VALVE SCHEMATIC
1
2
34
Inlet Outlet
Inlet
NOTE: For dimension information and material specifications see
component data sheets.
ID PART DESCRIPTION
1 Main Valve (S)106-PG or (S)
A106-PG
2Strainer J0098A
3Fixed
Restriction
4Pressure
Reducing Pilot
Model 161-PR,
Range 30-165 psi

4
PR-10159 PRESSURE REDUCING VALVE
Maintenance & Troubleshooting
TROUBLESHOOTING
with NFPA 25, the Standard
for Inspection, Testing, and
Maintenance for Water-Based Fire
Protection Systems requirements.
Testing after installation is to be
done in accordance with NFPA 13 or
NFPA 14, or both NFPA 13 and 14,
whichever is applicable, and tested
periodically thereafter in accordance
In addition to service suggestions
listed under NFPA 25 refer to
(S)106-PG Service Suggestions.
CARE / MAINTENANCE
PROBLEM CAUSE SOLUTION
Valve Fails to Open
1. Insufcient inlet pressure 1. Check inlet pressure source and increase as needed
2. Pressure in the bonnet not being released: 2. Try the following:
a) Isolating valves on pilot lines closed a) Open valves
b) Pilot components not functioning b) Refer to specic instructions on pilot components
c) Foreign material in pilot system c) Clear obstruction
Valve Fails to Close
1. Lack of pressure in bonnet due to: 1. Try the following:
a) Pilot components not functioning a) Refer to specic instructions on pilot components
b) Foreign material in pilot system b) Clear obstructions
c) Ruptured diaphragm c) Replace worn parts
d) Obstruction in the valve d) Remove obstructions
e) Worn main valve disc e) Replace disc
f) Plugged pilot strainer f) Flush strainer free of debris
Pulsations Occurring
1. Air in the bonnet 1. Vent air (refer to “Installation” #16)
2. Improper adjustments to pilot components 2. Refer to specic instructions on pilot components
3. Valve oversized 3. Smaller valve may be more suitable

5
PR-10159 PRESSURE REDUCING VALVE
Model 106-PG Main Valve Body Parts
b) Bonnet chamber is vented
to atmosphere with a minimal
pressure drop of 5 psi across the
main valve.
The valve closes when:
a) Bonnet is pressurized by
upstream pressure or an external
pressure (equal to or higher than
line pressure), sealing the inner
valve to the seat area tight.
Opening and Closing
The opening and closing action
is performed by the inner valve
assembly, controlled by the
pressure in the bonnet chamber
above the diaphragm.
The valve opens when:
a) Bonnet chamber is vented
downstream with a minimal
pressure drop of 10 psi across the
main valve.
Modulating
The valve can be made to modulate
by varying the bonnet pressure
between inlet pressure and outlet
pressure. This is done by the
pilot circuit.
OPERATION
operate more effectively and control
more accurately if the operating
pressure and sensing pressure is
connected to the header.
6. Six pipe diameters of straight
pipe on the inlet of any control
valve is recommended but:
a) Fully open Gate Valve can be
installed on the inlet of a valve,
provided it is used as an isolating
valve and never used in partially
open condition.
b) A Butterfly Valve with stem
horizontal cannot be installed in
the inlet of a control valve unless
operating pressure and sensing
lines are connected upstream of
the butterfly valve, in a location that
gives true system pressure.
c) A Butterfly Valve with stem
vertical can be installed in the inlet
1. Use washers under nuts when
bolting valve flanges to pipe flanges
to protect the Epoxy Coating.
2. It is recommended that valves
be installed in a horizontal pipe with
the bonnet up for more convenient
access for maintenance. However,
smaller valves (6" and smaller) may
be installed in a vertical pipe if the
order states the orientation.
3. A stable, continuous source of
pressure is necessary to operate a
pilot operated control valve.
4. Operating fluid must be clean
and free of air.
5. Under high velocity conditions,
when the pressure signal is located
at main valve inlet, it may be
adversely affected. When possible,
a more suitable location should be
used. For example, a relief valve will
of a control valve as long as velocity
does not exceed 15 ft / sec. The
butterfly valve can not be used for
throttling. If problems develop at
high flows, operating pressure and
possible sensing can be connected
upstream of the butterfly valve, in a
location that gives true
system pressure.
d) A Control Valve can be installed
with no straight pipe on the inlet
if the operating and sensing lines
are connected to a location that
gives true system pressure. The
connection point should be made
at the pipe center line to avoid air
pick-up at the top of the pipe.
7. This valve is shipped with air
pressure in the bonnet. Do not
open the Bonnet Isolating Valve
until the valve has been installed
and ready for pressurization.
INSTALLATION
The 106-PG (flat diaphragm)
and (S)106 -PG (single rolling
diaphragm) valves (Pic. A) are
the main valves used for Singer®
control valve systems.
Unless otherwise specified,
the valve is assembled with
components suitable for water
service up to 180° F (80° C). For
other service conditions, contact
your Singer representative.
OVERVIEW
A.
NOTE: This valve
must be stored
indoors, away from
direct sunlight.

6
PR-10159 PRESSURE REDUCING VALVE
(S)106-PG – Single Chamber, Hydraulically Operated Valve
11. Install pressure gauges
upstream and/or downstream
of valve as appropriate. This will
facilitate ease of setting the
pilot system.
12. A strainer with a suitable
basket should be installed ahead of
the valve to protect it from
foreign material.
13. Sufficient space should be
provided around the valve
for disassembly.
14. Flush system of all debris
before installing the valve.
15. Check direction of flow (inlet
of valve is marked OR an arrow
8. It is possible that diaphragms
may take a set after shipping and
storage. It is highly recommended
that Bonnet and Body Bolts or Nuts
be tightened after installation but
before pressurizing the valve. If a
leak develops after pressurizing,
de-pressurize the valve and tighten
the bolts or nuts.
9. For most convenient operation
and maintenance, line isolation
valves should be installed.
10. A suitable bypass should be
provided to allow for servicing of the
valve without interrupting the flow.
on the side of body indicates flow
direction) and install the
valve accordingly.
16. Vent air from the bonnet:
Valves with no Limit Switch:
Loosen pipe plug at the centre of
the bonnet to bleed air. If equipped
with position indicator, use bleed-
valve on indicator.
Valves with Limit Switch:
Refer to Drawing and use bleed
screw to vent air.
2. Disconnect body and bonnet
pilot lines.
3. Remove bonnet. If bonnet does
not come free readily, it can be
pried loose with a small pry-bar.
4. Remove inner valve assembly for
inspection. Do not remove seat ring
The Singer®Model (S)106-PG
requires minimal maintenance.
All parts are accessible for
inspection and repair without
removing the valve from the line.
1. Close upstream and downstream
isolating valves.
unless inspection shows that it is
damaged or debris is found below
the guide assembly. Be very careful
not to damage the epoxy coating
when removing and installing the
inner valve assembly.
5. Replace worn or defective parts
as necessary and reassemble.
MAINTENANCE
INSTALLATION (CONT.)

7
PR-10159 PRESSURE REDUCING VALVE
161-PR Pressure Reducing Pilot
Operation
The setpoint of the Model 161-PR
is determined by the compression
of Spring. The spring provides
Model 161-PR is a direct acting,
spring and diaphragm type pressure
reducing pilot. The valve is held
open by an adjustable spring.
a constant downward force on
diaphragm, while the outlet pressure
acting under the diaphragm opposes
the spring, which closes valve.
DESCRIPTION / OPERATION
3. Back off the adjusting screw, then
proceed to turn it in. The gauge
should show an increase within the
range marked on the valve.
1. Connect a source of air or water
to the inlet.
2. Attach a 3/8" line with a
pressure gauge and shut-off valve
to the outlet.
4. Open the shut-off valve slightly
and bleed flow to atmosphere.
Pressure should drop slightly and
return to setting when the shut-off
valve is closed. This check should
be repeated at various settings.
TESTING PROCEDURE
Adjustment
1. Turning the Adjusting Screw (#17,
page 10) clockwise increases the
setting of the pilot, providing a
higher downstream pressure.
2. Turning Adjusting Screw
counter-clockwise decreases the
setting of the pilot, providing a lower
downstream pressure.
1. Install the Pilot as shown in the
enclosed schematic or drawing.
2. Note the direction of flow and
install the valve accordingly.
3. The valve should be installed
with the adjusting screw
pointing up.
Note: Range of adjustments and
corresponding pressures are also
shown on the name plate on the
body of the pilot.
INSTALLATION / ADJUSTMENT
any additional friction between the
Stem and Guide Bushing can
affect performance.
Inner Valve Replacement
1. Hold the Inner Valve hex in
a vise and use a screwdriver or
similar tool to turn the Yoke.
Diaphragm Replacement
1. Hold the inner valve hex in a
vise and use a screwdriver to turn
the stem counter-clockwise using
the slot at the top of Stem.
Disassembly
1. Close upstream and downstream
isolating valves.
2. Remove the entire pilot from
the system.
3. Remove the adjusting screw.
4. Remove the Body Screws and
remove the spring casing assembly.
5. Loosen the diaphragm if it
adheres to the body and remove the
Stem / Yoke assembly. Be careful
to avoid damage to the stem as
If required, use a secondscrewdriver
or similar tool at the Yoke to prevent
the yoke from turning. When doing
so, take extra care to avoid damage
to the stem guiding surface.
2. Replace the diaphragm in the
same orientation as the original
one, straddling the legs of the yoke.
Assembly
Reassembly is the reverse of
disassembly. Ensure that parts are
replaced in the sequence shown on
the drawing.
MAINTENANCE
TROUBLESHOOTING
SPRING RANGE (PSI) ADJUSTMENT
(PSI / TURN)
30 – 165 26
PROBLEM CAUSE SOLUTION
Main Valve Fails to Open 1. Pilot setting too low 1. Raise setting (turn adjusting screw clockwise)
Main Valve Fails to Close
1. Pilot setting too high 1. Lower setting (turn adjusting screw counter-clockwise)
2. Obstruction on seat 2. Locate and remove obstruction
3. Ruptured diaphragm 3. Replace diaphragm
4. Worn inner valve 4. Replace inner valve

8
PARTS LIST
PR-10159 PRESSURE REDUCING VALVE
Parts
*Recommended spare parts (included in Rebuild Kit).
NOTES:
1. Not required on size 2 - 1/2", (One piece seat ring
and guide, shown as item 3).
2. On sizes 2 - 1/2"– 8" items 3 & 19 may be one
piece; material - Stainless Steel.
3. On sizes 2 - 1/2" & 3", material is brass B-16. On
size 4", material is bronze.
4. On size 3", material is bronze B-62.
SINGER SINGER
6
2
5
14
16
17
11
10
44
13
1
19
15
8
45
7
3
6
5
14
17 44
3
7
51
18 52
20
9
49
4
12
Two Piece Seat &
Bottom Guide Detail
One Piece Seat &
Bottom Guide Detail
46
ID DESCRIPTION MATERIAL
1Body Ductile
Iron / NAB / SS
2Bonnet Ductile
Iron / NAB / SS
3Seat Ring Stainless Steel (See
Note 2)
4Stem Stainless Steel
5Disc Retainer Ductile Iron (See
Note 3)
6Resilient Disc EPDM or Buna-N
7Inner Valve Ductile
Iron / NAB / SS
8* Diaphragm EPDM or Buna-N
9Clamp Plate Ductile
Iron / NAB / SS
10 Stem Nut Brass B-16
11 Spring Stainless Steel
12 Guide Bushing Brass B-16
13 Stem Cap Ductile
Iron / NAB / SS
14* Seat Ring Seal Buna-N
15* Stem Cap Seal Buna-N
16 Bonnet Bolt Stainless Steel
17 Seat Ring
Screws Stainless Steel 2
18 Stem Screw Stainless Steel
19 Bottom Guide
Ductile Iron &
Bronze (See Note
4)
44 Seat Retaining
Washer
Stainless Steel
(See Note 1)
45* Diaphragm
Seal Buna-N
46 Locating Pin Stainless Steel
49* Disc Retainer
Seal Buna-N
51 Bonnet Washer Stainless Steel
52 Stem Cap
Washer Stainless Steel

9
SINGER SINGER
FLOW
D
E
A
E
B
F
C
DIMENSIONS
PR-10159 PRESSURE REDUCING VALVE
Dimensions
106-PG & A106-PG GLOBE GLOBE & ANGLE ANGLE
A D E C B E F
2 - 1/2"
65 mm
NPT / BSPT 11"
279 mm
3.38"
86 mm
7.50"
191 mm
8.19"
208 mm
5.50"
140 mm
7.50"
191 mm
4"
102 mm
150F / PN10,
PN16, PN25,
PN40
11"
279 mm
3.50"
89 mm
7.50"
191 mm
8.19"
208 mm
5.50"
140 mm
7.50"
191 mm
4"
102 mm
300F 11.63"
295 mm
3.75"
95 mm
7.50"
191 mm
8.19"
208 mm
5.88"
149 mm
7.50"
191 mm
4.31"
110 mm
3"
80 mm
NPT / BSPT 13.50"
343 mm
3.68" 94
mm 8" 203 mm 9.25" 235 mm
6.63" 168
mm 8" 203 mm 4.63" 118 mm
150F 12"
305 mm
3.75"
95 mm 8" 203 mm 9.25" 235 mm 6" 152 mm 8" 203 mm 4" 102 mm
300F 13.25"
337 mm
4.13"
105 mm 8" 203 mm 9.25" 235 mm
6.38"
162 mm 8" 203 mm 4.38" 111 mm
PN10, PN16,
PN25, PN40
12.25"
311 mm 4" 102 mm 8" 203 mm 9.25" 235 mm
6.38"
162 mm 8" 203 mm 4.38" 111 mm
4"
100 mm
150F / PN10,
PN16, PN25,
PN40
15"
381 mm
4.60"
117 mm
9.15"
232 mm
10.88"
276 mm
7.50"
191 mm
9.15"
232 mm
5"
127 mm
300F 15.63"
397 mm
5.09"
129 mm
9.15"
232 mm
10.88"
276 mm
7.88"
200 mm
9.15"
232 mm
5.31"
135 mm
6"
150 mm
150F / PN10,
PN16
20"
508 mm
5.60"
142 mm
11.75"
299 mm
16.63"
422 mm
10"
254 mm
11.75"
299 mm
6"
152 mm
300F / PN25,
PN40
21"
533 mm
6.34"
161 mm
11.75"
299 mm
16.63"
422 mm
10.50"
267 mm
11.75"
299 mm
6.50"
165 mm
8"
200 mm
150F / PN10,
PN16
25.38"
645 mm
7.63"
194 mm
14.91"
379 mm
21.63"
549 mm
12.75"
324 mm
14.91"
379 mm
8"
203 mm
300F / PN25,
PN40
26.38"
670 mm
7.88"
200 mm
14.91"
379 mm
21.63"
549 mm
13.25"
337 mm
14.91"
379 mm
8.50"
216 mm

10
PR-10159 PRESSURE REDUCING VALVE
161-PR Pressure Reducing Pilot Parts & Dimensions
PARTS LIST
FIXED RESTRICTION
"A" Ø
1/4" NPT
1/4"
NPT
6
5
1
14
2
17
13
4
19
910
8
16
7
11
4
7
6
5
3 - 3/16" Ø
9"
Max
Inlet
3/8" NPT
Outlet
3/8" NPT
20
Outlet
3/8" NPT
18
ID DESCRIPTION MATERIAL
1Body Stainless Steel
2Diaphragm EPDM
3Outlet Connector Stainless Steel
4Stem Stainless Steel
5Inner Valve Stainless Steel and
EPDM
6Yoke Stainless Steel
7Clamp Plate Stainless Steel
8Spring Casing Stainless Steel
9Retaining Ring Stainless Steel
10 Guide Bushing Delrin
11 Casing Screw
(8) Stainless Steel
13 Spring Spring Steel
14 Spring Step (2) Stainless Steel
16 Locknut Stainless Steel
17 Adjusting Screw Stainless Steel
18 Seat Ring Stainless Steel
19 Seat Ring Seal Buna-N
20 Plug, 1/2 NPT Brass
"A" DIAMETER NO. OF ID
GROOVES
STAINLESS STEEL 303
PART NUMBER
STAINLESS STEEL 316
PART NUMBER
1/16" (1.6 mm) 1 M1009E-SS M1009E-S3
3/32" (2.4 mm) 2M1149E-SS M1149E-S3
1/8" (3.2 mm) 3M1010E-SS M1010E-S3
1/4" (6.4 mm) 4M1997A-SS M1997A-S3
7/64" (2.8 mm) 5M2023A-SS M2023A-S3
3/16" (4.8 mm) 6M1813B-SS M1813B-S3

11
PARTS LIST
PR-10159 PRESSURE REDUCING VALVE
Strainer – Parts & Dimensions
3
5
4
1
Model J0098A
3/8" NPT
1- 9/16"
(40 mm)
3" (76 mm)
Flow Out
Flow In
2
3/8" NPT
Model J0097A
3
5
4
1
3/8" NPT
Flow Out
Flow In
2
1/4" NPT
Sensing or Gauge
Connection
3/8" NPT
ID DESCRIPTION MATERIAL
1Body Stainless Steel 316
2Screen Retainer Stainless Steel 316
3Screen (40
Mesh) Stainless Steel 316
4Screen Retainer
Seal Buna-N
5Blow Down Plug Stainless Steel 316

12
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Please see muellerwp.com/brands and krauszusa.com to learn more.
Copyright © 2019 Mueller SV, Ltd. All Rights Reserved. The trademarks, logos and service marks displayed in this document are the property of Mueller Water Products, Inc., its afliates or other
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