Page 21 - Webster Service Manual

16
FUEL UNIT SPECIFICATIONS
M Series
Single- and Two-Stage Units
M34DK-3 Fuel Units
Single-Stage Unit
Capacities:
M Series rated 3 gph @ 100 psi with #1, #2 fuel oil or
kerosene.
M34DK-3 unit rated 3 gph fire size for pressure from
100
to 150 psi with #1, #2 fuel oil or kerosene.
Pressure:
Built in pressure regulator.
M Series factory set at 100 psi
M34DK-3 unit factory set at 100 psi, adjustable to 150 psi.
Speeds:
M Series—1725 and 3450 rpm
M34DK-3—3450 rpm.
Rotation:
Clockwise (D Style) or counterclockwise (C Style) when
viewed from shaft end.
Porting:
1/8”
NPTF: side location nozzle port, top located gauge
port
1/4”
NPTF: 2 inlets, and bottom return.
Shaft:
5/16”
dia. x 1.65” extension from mounting face with
keyless “D” drive.
Seal:
Double lip type Buna N.
Mounting:
Two bolt flange.
Filter:
Self cleaning rotary type internal
NOTE:
External filter recommended with each installation
Weight: (shipped oil filled)
M17 models—4 Ibs, 4 oz
M34 models—4 Ibs, 2 oz
2
M17 models—4 Ibs, 12 oz
2
M34 models—4 Ibs, 9 oz
Maximum Inlet Vacuum:
M models—10” Hg
2
M models—15” Hg
Refer to Table “Total Allowable Feet of Line” in this sec-
tion.
U.L. Listed.
To assure compliance with National Fire Protection
Association's Bulletin 31,” Installation of Oil Burning
Equipment,” fuel unit inlet pressure should not exceed 3 psig.
Refer to the section on Oil Safety Valves (page 119) for
additional information.