Model 8310HP Differential

Description

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. (See Figures 1 and 2).

The design takes advantage of all the features of the basic 8310HP double seated reducing regulator; see Technical Bulletin 8310-BASIC-TB. The availability of optional construction is limited to those indicated in this Technical Bulletin.

Inlet Design Pressure

• 8310HP-1+6: 400 psig (27.6 Barg)
• 8310HP-1+8: 400 psig (27.6 Barg)

Outlet Pressure

• NORMAL OPERATION –
  • 8310HP-1+6: 175 psig (12.1 Barg)
  • 8310HP-1+8: 175 psig (12.1 Barg)
• EMERGENCY OPERATION –
  • 8310HP-1+6: 200 psig (13.8 Barg)
  • 8310HP-1+8: 200 psig (13.8 Barg)

NOTE: Maximum safety relief device setpoint is not to exceed –
    8310HP-1+6: 1.10 x
    8310HP-1+8: 1.10 x
– the maximum Normal Outlet Pressure.

Line Sizes

• 1-1/2" (DN40)
• 2" (DN50)
• 2-1/2" (DN65)
• 3" (DN80)
• 4" (DN100)

End Connections

• NPT: 1-1/2" & 2" (DN 40 & 50) only
• Opt-30: Integral Flanged
• 125# Flgd: All body sizes, CI body, flat faced (FF)
• 250# Flgd: All body sizes, CI body, raised faced (RF)
• 150# Flgd: All body sizes, CS body, raised faced (RF)
• 300# Flgd: All body sizes, CS body, raised faced (RF)
• Opt-34: 14" Face to Face Flange
• Dim. (CS - Sizes 1-1/2" & 2" only)

(Complies with ASME B16.4 and B16.34)

Material Combinations: Body / Spring Chamber

• CI/DI
• CS/CS

CI = Cast Iron 
DI = Ductile Iron
CS = Cast Carbon Steel