Connection Of Sealing Liquid For Mechanical Seals; Pump Priming; Prime The Pump With The Suction Supply Above The Pump - Goulds Pumps 3700 Installation, Operation And Maintenance Manual

NOTICE:
• The mechanical seal must have an appropriate seal-flush system. Otherwise, excess heat
• Cooling systems such as those for bearing lubrication and mechanical-seal systems must
• Sealing systems that are not self-purging or self-venting, such as plan 23, require manual
Shipping
Pumps may be shipped with or without a mechanical seal installed.
Cartridge-type mechanical seals
Cartridge-type mechanical seals are commonly used. Cartridge seals are preset by the seal
manufacturer and require no field settings. Cartridge seals installed by the user require
disengagement of the holding clips prior to operation, allowing the seal to slide into place. If the
seal has been installed in the pump by ITT, these clips have already been disengaged.
Other mechanical seal types
For other types of mechanical seals, refer to the instructions provided by the seal manufacturer
for installation and setting.

Connection of sealing liquid for mechanical seals

Seal lubrication is required
Seal faces must have liquid film between them for proper lubrication. 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
Product flush
External flush
Other

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.
Model 3700, API Type OH2 / ISO 13709 1st and 2nd Ed. / API 610 8/9/10/11th Ed. Installation, Operation, and Maintenance
Manual
generation and seal failure can occur.
be operating properly to prevent excess heat generation, sparks, and premature failure.
venting prior to operation. Failure to do so will result in excess heat generation and seal
failure.
Description
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.
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 5 to 15 psi (0.35 to 1.01
2
kg/cm ) greater than the seal chamber pressure. The injection rate must be 0.5 to
2 gpm (2 to 8 lpm).
You can use other methods that employ multiple gland or seal chamber
connections. Refer to the mechanical seal reference drawing and piping diagrams.
Commissioning, Startup, Operation, and Shutdown
49