SPX TG H15-50, Instruction Manual, Page: 43 / 110

43
TGH 2-32/TGH 3-32
TGH6-40 - TGH360-150
2220
2210
3010
2090
2200
2080
2xBi
Bb
Bc
Bd
2200
3010
H2-32/H3-32 H6-40 – H360-150
T
Bj
1
Bj
2
A.0500.351 – IM-TGH/07.02 EN (10/2015)
• When at a high discharge pressure packing (3000) must be relieved. Connect the suction flange
via Bd or Bi.
Be sure the pressure in the lantern ring area is above atmosphere pressure to avoid air sucking
through the last packing rings which makes the packing running dry.
• The pumped liquid must be quenched to avoid contact with the atmosphere (when this liquid
is corrosive or poisonous) or when build up of residues of abrasive liquids against the packing
must be avoided.
Connect a clean, different liquid (e.g. water) via Bd or Bi at a pressure which is higher than the
pressure existing before the packing.
A slight quantity of this liquid will leak into the process liquid.
Two flushed connections
Flushing media requires two connections to provide in and out. This arrangement is used:
• To drain leaking or to cool or heat packing (3000). Connect inlet with Bc or Bi and outlet with
Bd or Bj. Both pumped liquid and another media can be used as flush media.
3.18.8.2 Single Mechanical seal
To guarantee lubrication and cooling of the sliding faces, let a media circulate along the mechanical
seal. Proceed as follows:
One connection point
• Connect suction or discharge flange with connection Bd or Bi.
Two connection points
• Connect discharge flange with connection
Bd
or Bi and suction flange with connection
Bc
.
• Provide piping with accessories to reduce flow.
• In case of either one or two connection points, Bc can be used as filling and air release plug.
Connection fluid circuit across single mechanical seal
Circulation of flush media without
pressure (GG)
3.18.8.3 Double mechanical seal – Tandem arrangement
For lubrication and cooling of the sliding faces at liquid side of this shaft sealing, proceed as
described in section “single mechanical seal”.
Provide via Bj the supply of a media quenching
the mechanical seal at atmosphere side. Install
the quench media reservoir at a height of maximum
1 metre above the pump and let the media circulate
without pressure or at least without overpressure.
Supply from an open tank will do thanks to the
Thermo siphon principle.
Pressure of the quench media must be reduced
in order to avoid the mechanical seal from being pushed open.
For other possibilities of connection, refer to section
3.18.8.6 Secondary connections.