Sheet 1597-2 Page 3
OPERATION
Start-Up
• To increase the outlet pressure setpoint turn the adjustment spindle counterclockwise with a screwdriver. • To decrease the outlet pressure setpoint turn the adjustment spindle clockwise with a screwdriver. • Always use an accurate pressure gauge connected downstream from the regulator to measure the actual outlet pressure. • Screw on protective cap. • After adjusting the setpoint for normal operation check to see that the gas pressure regulator operates as intended. Spring Exchange • Remove the black protective cap. Release spring by turning the adjustment spindle counterclockwise with a screwdriver. Turn the spindle to stop. • Remove the aluminum cap. • Remove spring. • Insert new spring. • Assemble adjustment spindle and adjust desired outlet pressure. Follow the Setpoint Adjustment instructions. • Screw on protective cap. • Stick new label with new outlet pressure range onto the name plate.
• The inlet and outlet shutoff valves should both be closed. • Slowly and carefully open the inlet shutoff valve just enough to allow inlet pressure to build up slowly in the regulator until it is fully pressured. CAUTION : During start-up a pressure gauge must be used on the regu- lator outlet pressure and carefully watched. While inlet pressure builds, outlet pressure must not exceed setpoint by more than 30%. If outlet pressure exceeds setpoint by more than 30%, close the inlet shutoff valve. The regulator is not closing properly. Check and make necessary corrections before proceeding with start-up. • Slowly open the outlet shutoff valve(s) to allow a small flow. Make sure the flow of gas dœs not create a hazard. • With gas flowing, check for correct inlet and outlet pressures. • Complete start-up by making sure that there are no leaks.
SetPoint Adjustment • Remove the black protective cap.
CAPACITY
200
80 100
60 50
40
30
20
8 10
4 5 6
3
2
Flow Diagram for Gas Pressure Regulator with Filter Outlet Pressure adjusted to 4"wc based on 60 F; 14.65 psia, dry.
1
10
200 300 400 600 800 1,000 2,000
20 30 40 50 60 80 100
4,000 6,000 10,000 20,000
V, flow (cfh) of natural gas; sp.gr. 0.65 at 60 F
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