Commissioning, Startup, Operation, and Shutdown
Model 710 TruBlue Installation, Operation, and Maintenance Manual
39
• Cartridge mechanical seal
Mechanical seal options
Pumps are usually shipped with mechanical seals installed. If they are not, then refer to the
mechanical seal manufacturer's installation instructions.
These are the mechanical seal options for this pump:
• Cartridge mechanical seal
Connection of sealing liquid for mechanical seals
Seal lubrication is required
Seal faces must have liquid film between them for proper lubrication. The standard model 710
cyclone seal chamber provides adequate flush of the seal faces without external piping on
single seals. piping should only be used if recommended by the manufacturer, or if there is a
double mechanical seal provided. Locate the taps using the illustrations shipped with the seal.
Seal flushing methods
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.
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 pressure. 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 chamber
connections. Refer to the mechanical seal reference drawing and piping diagrams.
Pump priming
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 until the pumped fluid flows out.
3. Close the air vents.
Item Description
1.
Discharge isolation valve
2.
Check valve
3.
Suction isolation valve
Figure 18: Suction supply above pump
Prime the pump with the suction supply below the pump
Use a foot valve and an outside source of liquid in order to prime the pump. The liquid can
come from one of these sources:
• A priming pump
Содержание TruBlue 710
Страница 1: ......
Страница 2: ......
Страница 22: ...Installation Model 710 TruBlue Installation Operation and Maintenance Manual 20 Baseplate leveling worksheet ...