Commissioning, Startup, Operation, And Shutdown; Preparation For Startup - Goulds Pumps 3700 Installation, Operation And Maintenance Manual

Commissioning, Startup, Operation, and
Shutdown

Preparation for startup

WARNING:
• Failure to follow these precautions before you start the unit will lead to serious personal injury and
• Never operate the pump below the minimum rated flow, when dry, or without prime.
• Do not operate the pump below the minimum rated flows or with the suction or discharge valves
• Foreign objects in the pumped liquid or piping system can block the flow and cause excess heat
• A build-up of gases within the pump, sealing system, or process piping system may result in an
• Sealing systems that are not self-purging or self-venting, such as plan 23, require manual venting
• Never operate the pump without the coupling guard correctly installed.
• Always disconnect and lock out power to the driver before you perform any installation or
• Operating the pump in reverse rotation can result in the contact of metal parts, heat generation, and
Precautions
NOTICE:
• Verify the driver settings before you start any pump.
• Make sure that the temperature change does not exceed 35°F (19°C) per minute.
• The maximum allowable temperature change for an abnormal transient event such as
You must follow these precautions before you start the pump:
• Flush and clean the system thoroughly to remove dirt or debris in the pipe system in order
• Bring variable-speed drivers to the rated speed as quickly as possible.
• Run a new or rebuilt pump at a speed that provides enough flow to flush and cool the
• If temperatures of the pumped fluid will exceed 200°F (93°C), then warm up the pump prior
At initial startup, do not adjust the variable-speed drivers or check for speed governor or over-
speed trip settings while the variable-speed driver is coupled to the pump. If the settings have
not been verified, then uncouple the unit and refer to instructions supplied by the driver
manufacturer.
Variable Speed Operation
If the 3393 is to be run with a variable speed drive, please confirm that the application has been
approved by the factory. Variable speed operation is limited to 2700 to 3600 rpm unless a
lateral critical speed analysis has been conducted by the factory and the speed range has been
Model 3700, API Type OH2 / ISO 13709 1st and 2nd Ed. / API 610 8/9/10/11th Ed. Installation, Operation, and Maintenance
Manual
equipment failure.
closed. These conditions can create an explosive hazard due to vaporization of pumped fluid and
can quickly lead to pump failure and physical injury.
generation, sparks and premature failure. Make sure that the pump and systems are free of foreign
objects before and during operation.
explosive environment. Make sure the process piping system, pump and sealing system are properly
vented prior to operation.
prior to operation. Failure to do so will result in excess heat generation and seal failure.
maintenance tasks. Failure to disconnect and lock out driver power will result in serious physical
injury.
breach of containment.
thermal shock is 400°F (205°C).
to prevent premature failure at initial startup.
close-running surfaces of the stuffing-box bushing.
to operation. Circulate a small amount of fluid through the pump until the casing
temperature is within 100°F (38°C) of the fluid temperature.

Commissioning, Startup, Operation, and Shutdown

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