VLT
Vertical Process Pump
32 V1.090418
A provision to vent gases from the seal gland plate must be provided. Canned
vertical pumps require that the can, seal chamber and discharge be vented
before startup. Vent connections will be connected to a designated system or
pump suction or discharge piping at a higher elevation than the seal gland
plate.
NOTE: Since the seal is located at the highest point of a vertical pump, this venting procedure ensures
that the seal chamber is completely filled before startup.
5.1 PIPING THE SYSTEM
NOTE: The information included in this section is intended as a general guideline. For further
information refer to the corresponding section in API Recommended Practices 686.
IMPORTANT: The design of piping and related systems is not the responsibility of Ruhrpumpen. It is,
therefore recommended that the customer consult a competent specialist skilled in the field of piping
to insure proper design/installation of all the piping.
1. Check whether the piping is loosely laid, so that no strain is placed on the pump.
Piping layout and installation shall provide adequate maintenance and
operation accessibility. Field-installed auxiliary equipment shall not interfere
with removal of the pump or driver.
2. Remove the covers of the pump flanges.
3. Check whether the seals are correctly mounted.
4. Install a check valve and a gate valve in the discharge pipe. When the pump is stopped, the
check valve will protect the pump against excessive back-flow pressure and will prevent
the pump from running backward.
The check valve should be installed between the gate valve and discharge
flange in order to permit its inspection.
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