dunphy TD - Technical Data Summary

Operating Instructions For TD/TAD4 Dual Fuel Burner
June 13 159 of 165 TD/TAD4 Manual Rev 4
VISCOSITY
70%
95%
VOLUMETRIC
EFFICIENCY
12.8.2 Technical Data Summary
Pump Model Code
DHO-1
DH1-1
DH1-2
DH2-1
DH2-2
Gearwheel Capacity litres/hr
290
750
1500
2250
4500
Gearwheel Capacity gall/hr
65
165
330
495
990
Weight - kg
6.3
6.7
8.1
17.5
20.9
Shaft Diameter - mm
10
10
10
16
16
Fuel Types
1.3 cSt. @ 40°C up to 130 cSt. @ 80°C
Speed
3600 Revolutions per minute ( maximum )
Operating Pressures
35 bar on standard units, maximum of 60 bar on tandem units
Capacity Range
145 to 4500 litres/hour ( 32 to 1000 imp gallons/hour approx )
Inlet Pressure
2 bar ( maximum ) ( 30 lbs. sq. inch )
Pump Fixing
Flange or Boss
Maximum Operating Temperature ( Fuel Oil )
140°C
NOTES
1. PUMP CAPACITY
A number of variants can be offered. There are
two basic gear-sets available in the range, these
cover swept volumes from 290 to 4500 litres/hour
at 2 pole ( 2850 rpm and 3400 rpm ) speed.
The further variants arise from the potential of
using the pumps as SINGLE, SERIES
or TANDEM sets as described in the diagrams
below.
SINGLE gear-set
The SERIES arrangement provides a similar CAPACITY
to the SINGLE but the PRESSURE can be doubled
without any increase on the bearing load.
The TANDEM arrangement DOUBLES the capacity
of the SINGLE gear-set
SINGLE
SERIES
TANDEM
2. CAPACITIES
Capacities are given for pumps running
at 2 pole speed ( 2850 rpm ) and a 50 Hz
electric supply.
3. GEARWHEEL CAPACITIES
As stated, these give the full swept
volume of the pump.
Because running clearances in the pump
are at an absolute minimum, the
Volumetric Efficiency of the gear-set
becomes a function of the viscosity of the
liquid being pumped.
( See diagram below ).