REGULATORS
adjust spring to set desired outlet pressure (for example: 20 osi)
spring pressure set to counterbalance 20 osi outlet pressure
vent to atmosphere
gas flow
gas flow
20 osi
regulator's valve opens until outlet pressure is 20 osi to balance spring pressure
SIMPLE (LINE) PRESSURE-REDUCING GAS REGULATOR
This type of regulator maintains a constant gas supply pressure upstream of control devices. A small regulator of this type is often used in pilot systems. (See "B'' on page 50) The schematic piping diagram on page 4 shows the main and pilot pressure- reducing regulators piped into a typical burner system. For trouble-shooting tips on pressure-reducing regulators, see page 46.
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