TECH DATA -
PRESSURE REGULATORS -
Discussion below pertains to 1000 to 90,000 cps materials using “Header Systems”
We have found in the past that pressure regulators are used primarily on “Header Systems”, or central dispense systems set up for adhesives. Adhesives are taken from a 300 gallon tote (example) and, using a high pressure transfer pump, are fed through clean piping to a meter mix dispense location. Line pressure in these pipes may be as high as 2000 psi.
Regulators are used primarily in the transfer system to bring down the pressure of the material before entering the metering pumps.
Basics of a dispense system are … typical units can be gravity fed from pails or drums. These metering systems, at some companies, see inlet pressures to be 800-1800 psi which causes some “painful problems” such as lead/lag start-up issues on each dispense. We often find that the customer keeps adjusting these regulators to try to solve the issue, only to deal with it on an almost daily issue.
The inlet pressure needs to be just high enough to feed the pump without starving. This is more related to flow rate and less about pressure.
What we have seen in the installations in the field by many dispense companies is a std regulator designed to have a lowest pressure output rating of 400 psi. In our view, this is at least 300 psi higher than it should be. We find that there are no “off the shelf” reasonable priced regulators available which will handle 3000 psi inlet and deliver 0-300 psi outlet.
We sell a specific regulator modified to handle this task. We also modify customers existing regulators as well (if they are the same brand we use).
We also have inlet manifolds designed to be easily removed for service of pumps.