Flowserve HWX Worthington - Manual (Page 33)

HWX USER INSTRUCTIONS ENGLISH - 07/14
Page 33 of 40
Try to turn the rotor by hand.If the
rotor cannot be turned, the pump must be
disassembled, refer to section 6.6 Dismantling HWX.
Actions after start up:
Check all connections to the seal gland and the
mechanical seal itself against leakage. It is usual that
at the seal faces a small leakage occurs after start
up, which decreases with the time of operation and
should stop after the seal is run in. Check the
temperature of the seal gland. I slight increase of
temperature may be observed during the run in
period. The mechanical seal is flushed by an API
Plan 11 and the temperature at the seal gland should
be max. 10 °C (18 °F) above the pumped liquid
temperature, unless otherwise specified by
mechanical seal supplier.
In Plan 11, product is routed from the pump
discharge via an orifice to the seal chamber to
provide cooling for the seal and to vent air or vapors
from the seal chamber. Fluid then flows from the seal
cavity back into the process stream.
API Plan 61 has tapped and plugged connections for
the purchaser´s use. Typically this plan is used when
the purchaser is to provide fluid (such as steam, gas, or
water) to an external sealing device.
Refer to the GA - drawing for the
required quench medium, pressure and flow.
Disassembly of the seal cartridge
is only allowed by authorized personal. Contact
Flowserve for any service of the mechanical seal. We
recommend to have a spare cartridge seal on stock
for easy replacement.
7.1.2 Single Mechanical Seal with API–Plan 23+62
Refer to mechanical seal drawing and
auxiliary piping drawing.
The pump is equipped with a single mechanical seal.
The cartridge design allows to change the
mechanical seal without taking it apart.
Try to turn the rotor by hand.If the
rotor cannot be turned, the pump must be
disassembled, refer to section 6.6 Dismantling HWX.
Actions after start up:
Check all connections to the seal gland and the
mechanical seal itself against leakage. It is usual that
at the seal faces a small leakage occurs after start
up, which decreases with the time of operation and
should stop after the seal is run in. Check the
temperature of the seal gland. I slight increase of
temperature may be observed during the run in
period. The mechanical seal is flushed by an API
Plan 23 and the temperature at the seal gland should
be below the pumped liquid temperature (refer to
mechanical seal drawing for temperature limit).
Plan 23 is the plan of choice for all hot water
services, and it is also disirable in many hydrocarbon
and chemical services where it is necessary to cool
the fluid establish the required margin between fluid
vapor pressure (at the seal chamber temperature)
and seal chamber pressure. In a Plan 23, the cooler
only removes seal face-generated heat plus heat
soak from the process.
Additionally the mechanical seal is equipped with a
Plan 62.
The mechanical seal is mounted as a complete unit in
the casing cover [1221] (Cartridge design).
The lubrication of the sealing faces and the cooling is
done from top of the sealing chamber through a pipe
with an orifice back to the suction side (API Plan 11).
Next to the mechanical seal is a quenching chamber
with a throttle bushing the quenching chamber has to
be flushed with water or steam (API Plan 62).
Refer to the GA - drawing for the
required quench medium, pressure and flow.
Disassembly of the seal cartridge
is only allowed by authorized personal. Contact
Flowserve for any service of the mechanical seal. We
recommend to have a spare cartridge seal on stock
for easy replacement.
7.1.3 Dual Mechanical Seal pressurized with
API–Plan 02+53b
Refer to mechanical seal drawing and
auxiliary piping drawing.
The pump is equipped with a dual mechanical seal in
face to back configuration, back to back configuration
or face to face configuration.
Try to turn the rotor by hand.If the
rotor cannot be turned, the pump must be
disassembled, refer to section 6.6 Dismantling HWX.
The mechanical seal requires no adjustment
anymore. Check if the mounting plates are already
swung out.
Actions after start up:
Check all connections to the seal gland and the
mechanical seal itself against leakage. Check the
temperature of the seal gland. I slight increase of
temperature may be observed during the run in
period.