Blagdon Pump X25 PTFE Non-Metallic - Manual (Page 10)

HG-CF-1200 Rev. 0 – 17.12.09 Page 10
HIGH TEMPERATURE INSTALLATIONS
In situations where the temperature of the fluid to be pumped is likely to exceed 100°C, a high temperature pump code must be specified. This
is signified using an ‘X’ in the last part of the pump code as shown.
“XTS” in place of “TTS”. Reference Pump Code matrix on page 6
This indicates the following specification amendments :-
Some seals and o-rings can be changed from Buna-N to Viton. Back-up diaphragms and any bumpstops will be changed to Viton.
Refer to main table on page 8 for quantities / pump.
Flanged Manifolds
Suction Lift Installation
Flooded Suction Installation
Submerged Installation
Exhaust Safety :-
When a diaphragm fails during operation, pumped liquid can enter and contaminate the air side of the pump. If diaphragm failure is not
severe, i.e. a small split or hole, then the pump can continue to run, with air being forced into the product being pumped. If however the
failure is more serious, then the pump may stop, with fluid or fumes being expelled through the exhaust. Under these conditions it is
recommended that the exhaust is piped away to a safe area. In standard suction lift conditions this can simply be done by piping from the
exhaust connection to a safe area. Multiple installations can be piped to a common connection, then to a safe area. In flooded suction
conditions the exhaust must be taken to a point higher than the fluid level to prevent any siphoning away. In submerged conditions ensure
exhaust is piped away above fluid level.
In all conditions ensure exhaust outlet is not expelling across a non-conductive surface. The exhaust must not be placed less than 100mm
from any non-conductive surface, as this may generate a propagating brush discharge resulting in a possible ignition source.
Exhaust Safety Instructions
FLANGED MANIFOLD PART NOS.
SUCTION
MANIFOLD 40
ANSI 150 PN16
VIRGIN PTFE 25-196 25-200
CONDUCTIVE PTFE 25-198 25-202
DISCHARGE
MANIFOLD 17
ANSI 150 PN16
VIRGIN PTFE 25-197 25-201
25-199 25-203 CONDUCTIVE PTFE