regulator types and proformance Flashcards
what’s the proper location for the service regulator
on the service line before the meter
what’s the proper location for the line pressure regulator
between the service and the applinace regulator
what’s the proper location for the appliance regulator
at the appliance
what is the setpoint
the set or required outlet pressure
what does lockup mean
the pressure above the setpoint set to close the valve tight
what is meant by droop
the difference in pressure between the setpoint and the actual delievery pressure to the regulator full open pressure
cycling, higher lockup and bathtub stopper effect are oll symptoms caused by
an over sized orifice
how does a pilot tube improve the accuracy of the regulator
it senses when velocity is highest and therefore the pressure is lowest causing the diaghragm to open the valve more than is needed, boosting the pressure for a split second
what is the benifit associated with lever-type-direct-operated regulators
it has a greater mechanicle advantage and therefore a higher shut off force
define the term direct operated when describing regulators
the regulator opens and closes in direct response to down stream pressure
spring rate, diaphragm area, orifice size and pressure drop are all factors that effect
droop
the restricting elemeant of a regulator is
valve disc
increasing the spring force in an appliance regulator will
increase the manifold pressure
a pressure regulator is said to be the equalibrium when the
the opening force of the spring is equal to the closing force of the downstream pressure
the loading force in most regulators is provided by the
spring
