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3.17.7.2 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 3.20.7.
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 (in cast iron version Bh provided only in TG BLOC58-80 and TG BLOC86-100 model).
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 3.20.7.
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.
3.17.8 Flush media
The TopGear BLOC pumps are provided of a flush room
around the mechanical seal with threaded connections Bb
at top
The room can be connected to a tank supply installed
above pump level or to an external flush supply line at low
pressure (max. pressure 0.5 bar).
Attention should be given to compatibility of flush 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.
32
S-jacket on pump cover
Bl
Bl
TG BLOC15-50/23-65
Bl
Bl
Bh
TG BLOC58-80/86-100
Bo
A.0500.751 – IM-TGBLOC/01.00 EN (10/2020)
Bo
Bb
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