Idex Hale Sam, Техническое руководство

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4.9.2 Priming Feature Assembly
The priming feature assembly consists of a large bracket that uses multiple components to route
the ESP primers vacuum to the selected MIV for drafting purposes. Refer to FSG-PL-01514 for a
priming (including air bleed) tube routing diagram. The number of each component varies de-
pending on the number of Hale MIVs order for that specific SAM system, in general the bracket
houses: multiple 4-way air valves, multiple PF valve assemblies, and the pump body air bleed so-
lenoid.
Two 4-way air valves are included with every SAM system, one controls the pump body prime PF
valve and the other controls the SAM drain PF valve then one 4-way valve is added to control the
PF valve associated with each of the MIVs ordered with that specific SAM system. Each 4-way
valve is electrically turned on/off to provide truck (compressed) air to the appropriate end of the
associated dual action air cylinder to open (or close) the PF valve for that MIV (or the pump body
or SAM drain).
Two PF valve assemblies are also included with every SAM system, one controls the pump body
priming (quick prime) and the other controls the SAM drain then one PF valve assembly is added
to control pre-priming for each MIV ordered with that specific SAM system.
An air bleed solenoid is also always provided and is electrically controlled to support automated
air bleed for the pump body.
In summary, the PF valves are activated by truck air and are turn off automatically when a prime
is sensed by the system. The 4-way valves route truck air to a specific PF valves dual actuator cyl-
inder when an intake is selected from the SAM Control Center (with Draft Mode selected for that
MIV) which routes the priming port of the ESP to remove the air from the draft source up to the
selected MIV. (Effectively drawing water into the LDH right up to the butterfly valve in the se-
lected MIV when in Draft Mode.) Refer to FSG-PL-01501 (-01502 or -01513), Sheet 5 or see Fig-
ure 75 (shown for Q series pumps) for the priming feature assembly location.
Figure 75. Priming Feature Assembly
The assembly installs on top of the gearbox (Q series pumps) or a frame rail (all other pumps)
and is recommended to be removed from the apparatus with all component repairs completed
as bench procedures.