Models 8310HP-1+6 and 8310HP-1+8 are differential reducing regulators used to maintain a relatively constant pressure differential between the fluid loading pressure – PLoad, and the valve’s outlet pressure – P2, with P2 pressure higher than PLoad pressure.
Model 8310HP-1+6 is a single-diaphragm differential construction.
Model 8310HP-1+8 is a double-diaphragm differential construction.
A double-diaphragm design prevents the fluid passing through the body from mixing into the loading fluid pressurizing the spring chamber in the event of a diaphragm failure.
The design takes advantage of all the features of the basic 8310HP double seated reducing regulator; see Technical Bulletin 8310-BASIC-TB.