Page 1
Reduced Pressure Zone Specification Submittal Sheet
Model RPZ (2½” - 10”)
FEATURES:
Sizes: □2 ½” □3” □4” □6” □8”
Max. working pressure: 175 PSI (1200 kPa)
Max. working temperature: 140°F (60°C)
Hydrostatic Test Pressure: 350 PSI (2400 kPa)
MATERIALS:
Valve Body: Ductile Iron
Access Cover: Ductile Iron
Polymers: Noryl
Elastomers: Silicone
Buna-n (FDA approved)
Springs: Stainless Steel
Coatings: FDA approved fusion epoxy
OPTIONS:
1 – less NRS gate valves
OSY – with OS&Y gate valves
STANDARDS COMPLAINCE:
TM,
NSF Listed
(ex B9215 replace 3rd number)
● ASSE® Listed 1013
● CSA® Listed
● AWWA Compliant C511
● City of Los Angeles Approved
● Approved by the Foundation for Cross-Connection
Control and Hydraulic Research at the University
of Southern California
FLOMATIC SPECIFICATIONS:
Reduced Pressure Principle backflow preventer shall
protect against backflow by either backpressure or
backsiphonage from a cross-connection between
potable water systems and substances that are nonhealth and health hazards.
The device shall be constructed from Ductile Iron. It
shall consist of two (2) mechanically independent,
spring loaded, center stem guided check valves. It
shall also have a hydraulically dependent differential
pressure relief valve with the sensing passage set in
an integral cast ductile iron body, with a single access
cover. The assembly shall have four (4) vertical test
cocks and two shut off valves which are quarter-turn,
full-port, resilient seated and ball type which are
constructed with low lead material, less than 0.25%
lead content (ASTM C90500) or approved equal.
Supplied with full ported gate valves.
The relief valve shall have removable stainless steel
seat ring. The check valves shall be held into place by
stainless steel clips and the check valve assemblies
shall be non-interchangeable with silicone discs.
Size A B C D Width Wgt with GV Wgt less GV
Inch mm
2-1/2 65 B9205 31-1/4 794 16-1/4 413 16-7/16 418 11-3/8 289 8-1/32 204 164 74.5 60 27
3 80 B9206 32-1/4 819 16-1/4 413 17-7/16 443 12-3/8 314 10 254 186 84.5 60 27
4 100 B9207 39 991 21 533 22-13/32 569 14-3/4 375 10 254 314 142.5 120 54.5
6 150 B9209 44-5/8 1133 23-1/2 597 28-3/8 721 19 483 12-1/2 318 463 210 163 74
8 200 B92010 52-1/2 1334 29-1/2 749 32-7/16 824 22-1/2 572 15-3/16 386 710 322 300 136
10 250 B92011 61-1/8 1553 34-7/8 886 36-15/16 938 26-1/2 673 18 457 125 567 530 240
Part #
Inch mm Inch mm Inch mm Inch mm Inch mm lbs kg lbs kg
Danfoss Flomatic Corp, 15 Pruyn’s Island, Glens Falls, New York 12801
Phone: 518-761-9797 Fax: 518-761-9798 www.flomatic.com
Danfoss Flomatic
July 6,2004 Rev. 5
Specification Sheet RPZ1
Page 2
Reduced Pressure Zone Specification Submittal Sheet
Model RPZ (2½” - 10”)
FLOW CHARACTERISTICS
i
a
s
P
p
S
S
O
L
E
R
U
S
S
E
R
P
k
138 20
110 16
83 12
855
428
0
FLOW CURVES w/ GATE VALVES
2-1/2" (65mm)
3" (80mm)
100
6.31
200
12.62
300
FLOW RATE
4" (100mm)
500400
600 gpm
25.2418.93
31.55
37.86 lps
(Established by Approval Agencies)
▲ RATED FLOW
TYPICAL INSTALLATION
Model RPZ Reduced Pressure Backflow Preventers
should be installed with adequate clearance and easy
accessibility for testing and maintenance and must be
protected from freezing. Local codes shall govern
installation requirements. Unless otherwise specified,
the assembly shall be mounted at a minimum
clearance of 12” (305mm) between port and floor or
grade. The assembly shall have a maximum of 30”
(762mm) above adequate drains with sufficient side
clearance for testing and maintenance. The installation
shall be made so that no part of the unit can be
submerged. Thermal water expansion can cause
excessive pressure. Excessive pressure situations
i
a
s
P
p
S
S
O
L
E
R
U
S
S
E
R
P
k
138 20
110 16
83 12
855
428
0
FLOW CURVES w/ GATE VALVES
500
31.55
Capacity thru Schedule 40 Pipe (GPM)
Pipe size 5 ft/sec 7.5 ft/sec 10 ft/sec 15 ft/sec
2 ½”
3”
4”
6”
8”
75 112 149 224
115 173 230 346
198 298 397 595
450 675 900 1351
780 1169 1559 2339
should be eliminated to avoid possible damage to the
system and assembly.
WARRANTY: Danfoss Flomatic valves are guaranteed against defects of materials or workmanship when used for
the services recommended. If in any recommended service, a defect develops due to material or workmanship, and
the device is returned, freight prepaid, to Danfoss Flomatic within 12 months from the date of purchase, it will be
repaired or replaced free of charge. Danfoss Flomatics’ liability shall be limited to our agreement to repair or replace
the valve only.
Danfoss Flomatic Corp, 15 Pruyn’s Island, Glens Falls, New York 12801
Phone: 518-761-9797 Fax: 518-761-9798 www.flomatic.com
6" THRU 10"2-1/2" THRU 4"
6" (150mm)
1000
FLOW RATE
Danfoss Flomatic
8" (200mm)
1500
94.6463.10
Specification Sheet RPZ1
10" (250mm)
2000
126.18
July 6,2004 Rev. 5
2500 gpm
157.73 lps
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