Woodward TecJet 110, Инструкция по установке и эксплуатации

Страница: 31 / 52

Manual 26185 TecJet 110 Fuel Metering System
Woodward 25
Chapter 4.
Valve Sizing
Figures 4-1 and 4-2 show the maximum and minimum amounts of gas that the
TecJet™ 110 will flow as a function of pressure differential in kPa(d). Figure 4-1
indicates flow values for Specialty Gas, while Figure 4-2 indicates flow values for
Natural Gas. Plots for the TecJet 50 Plus and the TecJet 50 are also shown for
comparison purposes.
Comparing the TecJet 110 vs Application Maximum Flow Rate
Choose the correct graph depending on your application flow media. Determine
the maximum flow rate for your application in a metric mass flow rate (kg/h).
Increase this value by 15% to ensure that the TecJet 110 will handle the
maximum flow requirement under all conditions. Find this increased flow value on
the left-side Y-axis of the graph. Next, determine the approximate valve pressure
drop at the actual maximum flow for your application. Locate this value on the X-
axis of the graph. Metric (kPa(d)) units are provided. Note that the graphs
assume the application outlet pressure is at sea level atmospheric pressure.
Take the increased flow rate value and the pressure drop value, and determine
where they cross on the graph. This is the maximum flow operating point for your
application. This point should fall below the maximum flow plot for the TecJet
110.
Comparing the TecJet 110 vs Application Minimum Flow Rate
Choose the correct graph depending on your application flow media. Determine the
minimum flow rate for your application in a metric mass flow rate (kg/h). Reduced
this value by 10% to ensure that the TecJet 110 will handle the minimum flow
requirement under all conditions. Find this reduced flow value on the right-side Y-
axis of the graph. Next, determine the approximate valve pressure drop at the
actual minimum flow for your application. Locate this value on the X-axis of the
graph. Metric (kPa(d)) units are provided. Note that the graphs assume the
application outlet pressure is at sea level atmospheric pressure. Take the reduced
flow rate value and the pressure drop value, and determine where they cross on
the graph. This is the minimum flow operating point for your application. This point
should fall above the minimum flow plot for the TecJet 110.