ITT Goulds Pumps i-FRAME 3640, Инструкция по установке, эксплуатации и обслуживанию

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Seal flushing methods
Table 1: You can use these methods in order to flush or cool the seal:
Method Description
Product flush Run the piping so that the pump pushes the pumped fluid from the
casing and injects it into the seal gland. If necessary, an external heat
exchanger cools the pumped fluid before it enters the seal gland.
External flush Run the piping so that the pump injects a clean, cool, compatible liquid
directly into the seal gland. The pressure of the flushing liquid must be
0.35 to 1.01 kg/cm
2
| 5 to 15 psi greater than the seal chamber pres-
sure. The injection rate must be 2 to 8 lpm | 0.5 to 2 gpm.
Other You can use other methods that employ multiple gland or seal cham-
ber connections. Refer to the mechanical seal reference drawing and
piping diagrams.
5.8 Pump priming
WARNING:
These pumps are not self priming and must be fully primed at all times during operation. Loss
of prime can lead to excessive heat and severe damage to the pump and seal.
WARNING:
A build-up of gases within the pump, sealing system, or process piping system may result in an
explosive environment. Make sure the process piping system, pump and sealing system are
properly vented prior to operation.
Before the pump is started, the pump must be fully primed and the suction pipe must be full of liquid. If
pump is run dry, then rotating parts within the pump can seize to stationary parts because they depend
upon the pumped liquid for lubrication. Several methods of priming can be used depending upon the type
of installation and service involved.
5.9 Prime the pump with the suction supply above the pump
1. Slowly open the suction isolation valve.
2. Open the air vents on the suction and discharge piping, the casing, the seal chamber, and the seal
piping, if provided, until all air is vented and only the pumped fluid flows out.
3. Close the air vents.
5.8 Pump priming
3640 i-FRAME API Type BB2 2-Stage / ISO 13709 2nd Ed. API 11th Ed. Installation, Operation, and Maintenance Man-
ual 55