John Crane 4610 - Thermosiphon System and Piping Installation Guide; Plan 52 - Dual Unpressurized Arrangement; Plan 53 A - Dual Pressurized Arrangement

4610, 4615, 4620P, 5610, 5610D, 5610L, 5610P, 5610Q, 5610VL,
5610VQ, 5611, 5611L, 5611Q, 5615, 5615L, 5615Q, 5620, 5620D, 5620P,
5620VP, 5620V, 5625, 5625P, EZ-1, FFET, SB1, SB1A, SB2, SB2A, SBW
STANDARD CARTRIDGE SEALS
Installation, Operation & Maintenance Instructions
8
TYPE
Notes
•
Direction of rotation is as viewed from the driver.
•
For single seal counter-clockwise applications a gland plate is required
with port 4 drilled. If this port is not drilled contact your local John
Crane Service Center.
•
A Plan 11/Plan 13 flush for horizontal/vertical shafts is always
recommended for single and dual seals.
•
Before starting the pump after seal fitting vent the seal chamber
through the pump’s lantern ring connection at TDC if safe to do so.
•
If manual venting of the seal is required, a safe method must be used. A
self-venting installation is always the preferred option.
•
For seals over 75 mm/3.000 inch the connection positions may vary for
other bolting arrangements.
•
For seals other than the 5600 series follow the installation guide
For Gland Piping Seals Other Than 5600 Series.
Thermosiphon System and Piping Installation Guide
Plan 52 – dual unpressurized arrangement
Plan 53A – dual pressurized arrangement
Plan 54 –piping layout
Plan 52/53A – piping layout
For Gland Piping Seals Other Than 5600 Series
NOTE Thorough venting of the seal faces is essential for long seal life.
•
For single seals on a horizontal shaft the flush should be at TDC to
give a self-venting seal chamber. If this is not practical then either
manually vent the seal chamber using the pump’s lantern connection
at TDC if it is safe to do so or drill a 5 mm/3/16 inch hole in the pump
throat bush at TDC.
•
For single seals on a vertical shaft the flush should be above the seal
faces to ensure self-venting.
•
For dual seals on a horizontal shaft the barrier outlet should be at TDC
to ensure self venting of the seal. If this is not practical then manually
vent the seal if it is safe to do so. The seal chamber should be vented
as described in paragraph 1.