Heating Jackets; Flush/Quench Media - Johnson Pump TG GS2-25 Instruction Manual

3.18.7.2 Heating jackets

1. S-type jackets
The S-jackets are designed for use with saturated steam (max 10 bar, 180°C) or with non-dangerous
media. They are provided with threaded connections Bl (see chapter 6.0 for the dimensions).
The connection can be done by threaded pipes or pipe connections with sealing in the thread
(conical thread applying ISO 7/1) or sealed outside the thread by means of flat gaskets (cylindrical
thread applying ISO 228/1). Thread type see section 3.21.7.
2. Jacket on pump cover
In case of steam supply, connect the supply line at the highest position and the return line
to the lowest position so that condensed water will be drained via the lowest line. In case of liquid
supply, the positions are not important. A drain plug Bh is provided and can be considered as a drain
line (TG GS58-80 to TG GS185-125).
3. Jackets on safety relief valve – around spring casing
The jackets on the safety relief valve are designed for
use with saturated steam (max 10 bar, 180°C) or with
non dangerous media. They are provided with threaded
connections B0 (see chapter 6.0 for dimensions).
The connection can be done by threaded pipes or pipe
connections with sealing in the thread (conical thread
applying ISO 7/1). Thread type see section 3.21.7.
In case of steam supply, connect the supply line at the highest
position and the return line to the lowest position so that condensed
water will be drained via the lowest line. In case of liquid supply, the positions are not important.

3.18.8 Flush/quench media

The TopGear GS pumps from size TG GS15-50 and
higher are provided of a flush/quench room behind
the mechanical seal with threaded connections Bn
at top and at bottom.
The room can be connected to a tank supply installed
above pump level or to an external flush/quench supply
line at low pressure (max. pressure 0.5 bar) and/or to
a drain line. It is also possible to connect both connections
to a cleaning line – supply at top and drain at bottom –
to clean regularly the room from medium leacking
trough the mechanial seal.
Attention should be given to compatibility of
flush/quench medium towards
• nitril rubber of radial lipring
• ball bearing grease because medium could leack in very small quantities towards the ball
bearing.
Use for example clean lubrication oil ISO VG32.
34
S-jacket on pump cover
Bl
Bl
GS2-25/GS23-65
Bl
Bl
Bh
GS58-80/GS185-125
Bo
A.0500.501 – IM-TGGS/05.01 EN (03/2013)
Bo
Bn
Bn