Page 1 - R & M Series codebreakdown

R SERIES SERVICE SAVER FUEL UNITS
Available in both single-and two-stage models,
Webster’s service saver fuel units are rated
to capacities of 80 gph. Featuring the
unique Webster rotary filter, simple flange
mounting, and an extended shaft length, the
R Series is adaptable to virtually every
replacement need.
FUEL UNIT SPECIFICATIONS
R Series Fuel Units
Capacities to 80 gph
Single- and Two-Stage
R SERIES FUEL UNITS — CODE ANALYSIS
A
F
1
R - Single Stage -1725 RPM Bypass Plug Access
21
R - Single Stage -3450 RPM * Right hand inlet (from front cover)
2
R - Two Stage -1725 RPM - Left hand inlet (from front)
22
R - Two Stage -3450 RPM
31
R - Single Stage -1425 RPM
G
41
R - Single Stage -2850 RPM Design Series
32
R - Two Stage -1425 RPM Shaft Seal Type
42
R - Two Stage -2850 RPM Face Lip
B
Number of Filter Sections 1 thru 6
C
Max Rated Pressure (PSI)
Max.
Factory
Code Pres.
Set At
1 150
PSI
100
PSI
2 300
PSI
100
PSI
3 20
PSI
10
PSI
4 45
PSI
40
PSI
5 100
PSI
100
PSI
6 125
PSI
100
PSI
8 80
PSI
20
PSI
D
Pressure Gear Size 0 thru 8
E
Rotation and Porting-
As viewed from Shaft End
A Clockwise Nozzle Port Left
B CCW Nozzle Port Right
C CCW Nozzle Port Left
D CW Nozzle Port Right
M34DK-3 SERIES FUEL UNITS
SINGLE STAGE UNITS
To meet the needs of today
s fuel-efficient, downsized and space effi-
cient burners, Webster
s popular M34DK-3 incorporates improved
access to both the bleed valve and bypass plug. Locating the bleed port
plug assembly on the side of the fuel unit provides the service technician
with one visible and accessible location to either bleed the fuel unit or
change the bypass plug without removing the burner. The M34DK-3
retains all of the industry accepted, state-of-the-art features of the
M34DJ-3 fuel unit. These include faster fuel cut-off, improved priming on
one-pipe installations, and reduced inlet line flow on two-pipe systems
which results in reduced line noise. Webster
s M34DK-3 fuel unit is avail-
able in a single stage, 3450 RPM model rated at 3 GPH. Operating pres-
sure is factory set at 100 psi and is adjustable to 150 psi. The M34DK-3
is capable of maintaining its 3 gallon per hour fire size at up to 150 psi
throughout it
s service life.
M SERIES FUEL UNITS
SINGLE- AND TWO-STAGE
Light and extremely compact, the Webster M
Series fuel units have earned a reputation for
reliability and efficiency. All units include the
Webster internal rotary filter. The rotary filter
reduces the need for troublesome periodic clean-
ing. Because the filter blades rotate at motor
speed with constant cleaning action, clogging is min-
imal compared to units that use internal filter screen. For maximum pro-
tection, an additional line filter is recommended in accordance with stan-
dard practice. Another popular feature is the easy-to-bleed valve assem-
bly located on the side. A
D
drive reduces the harmful effects low-lubric-
ity fuels had on previous key-drive designs. Simple flange mounting and
side-located nozzle ports make the M Series ideal for fuel unit servicing.
M Series fuel units are available in single- or two-stage, 1725 and 3450
rpm models with capacities to 6 gph.
A
M=Single Stage
2
M=Two Stage
B
17
=1725 RPM
34
=3450 RPM
C
C=CCW rotation, outlet left
D=CW rotation, outlet right (as viewed from shaft end)
D
A = Key drive, face seal, old style porting
B = Std., face seal, old style porting
C = Special,face seal,old style porting
D = Std. lip seal, old style porting
E = Special, lip seal, old style porting
F = Same as D except revised porting
G= Same as E except revised porting
H = Same as F except o-ring on pressure adjusting screw
J = Same as H except revised internal porting
K = Same as J except revised porting and bleed valve location
L = Same as H except revised porting and bleed valve location
E
3
= 3gph max. recommended fire size
6
= 6gph max. recommended fire size
15
=15gph max. recommended fire size
F
No *=Unit set 1 pipe (Bypass plug not installed)
*
=Unit set 2 pipe (Bypass plug installed)
1 4 1
stage or 2 stage w/suction
gear same size as pressure gear.
3 5 2
stage w/suction gear one size
larger than pressure gear.
H
Special Customer Modifications
J
Nozzle Outlet Type and Bypass
Condition. Final digit even - Factory
set for 2-pipe operation. Final digit odd
-
Factory set for one pipe operation.
TYPICAL CODE
IR I I I D
I A 3
A B C D E F G H J
Pressure:
Built in pressure regulator.
Factory set at 100 psi (supply pumps set at 20 psi).
Porting:
1 /8
NPTF: side location nozzle port if pump code ends in 3 or 4.
1 /4
NPTF: side location nozzle port if pump code ends in 13 or 14.
1 /4
NPTF: 2 inlets, gauge port and top and bottom returns.
Seal:
Mounting:
Double lip type.
Two bolt flange.
Filter:
Self cleaning rotary type - internal.
NOTE:
External filter recommended with each installation.
Maximum Inlet Vacuum:
Single-stage units - 10
Hg Two-stage units - 15
Hg
MODEL R --- SINGLE STAGE
SHAFT
NOZZLE
CAT. NO. MFG. NO.
MOUNT ROTATION LOCATION EACH
2
P248 1R162D Flange
R.H. (CW)
L.H.
MODEL R --- TWO STAGE
SHAFT
NOZZLE
CAT. NO. MFG. NO.
MOUNT ROTATION LOCATION EACH
2
P237 22R221D HUB/Flange R.H. (CW)
R.H.
MODEL M --- SINGLE STAGE
1725
RPM MODELS
SHAFT
NOZZLE
CAT. NO. MFG. NO.
MOUNT ROTATION LOCATION EACH
2
P241 M17DL-6
Flange
R.H. (CW)
R.H.
3450
RPM MODELS
SHAFT
NOZZLE
CAT. NO. MFG. NO.
MOUNT ROTATION LOCATION EACH
2
P243 M34DK-3 Flange
R.H. (CW)
R.H.
MODEL 2M --- TWO STAGE
1725
RPM MODELS
SHAFT
NOZZLE
CAT. NO. MFG. NO.
MOUNT ROTATION LOCATION EACH
2
M17DL-6 Flange
R.H. (CW)
R.H.
3450
RPM MODELS
SHAFT
NOZZLE
CAT. NO. MFG. NO.
MOUNT ROTATION LOCATION EACH
2
P265 2M34DL-3 Flange
R.H. (CW)
R.H.
Webster
®
Fuel Pumps & Valves