The flow characteristics of the pressure regulator having a set point pressure o
ID: 1843396 • Letter: T
Question
The flow characteristics of the pressure regulator having a set point pressure of 25 psig when the input pressure is 100 psig is shown in Figure 1. This regulator maintains pressure for a system designed to supply air to equipment at a flow rate of 4 SCFM during average system demand and up 6 SCFM if all the equipment is operating at the same time. The manufacture of the regulator will report flow rates at 10% and 20% drop on his specification sheet based on the set point pressure since he doesn't know how it will be used for a particular application. What flow rates will the manufacturer report on the specification sheet below for these droop conditions? At what pressures do 10% droop and 20% droop occur? What is the pressure downstream of the regulator: When there is no demand ___, During average system demand ___, and During maximum system demand ___? Indicate on Figure 1 the point at which the regulator will be operating at during average system demand, maximum system demand, 10% droop, and 20% droop. The shop manager want to add several new pieces of pneumatically operated equipment that will require an additional 6 SCFM. What can happen to the system and what would you recommend? Answer questions a. through f. in Lab #3 and attach requested plots.Explanation / Answer
The function of a pressure reducing regulator is to precisely reduce a high upstream pressure of a gas or liquid to a lower stable pressure for the user application . further more the regulator willattempt to maintain and control the outlet pressure with in limits s other conditios vary but the regulator should not be used as a shut off device as there is always a small amount of leakage across the seat . a shutt off valve must be used downstream of the regulator if isolation is required.
Keeping air flw constant , the variation in the set output pressure the canges in the input pressure defines the pressure regulation characteristics of pressure regulator.