Blagdon Pump B25 Manual de serviço e operação - Página 10

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1. Service

HIGH TEMPERATURE INSTALLATIONS

In situations where the temperature of the fluid to be pumped is likely to exceed 80°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 :-

All seals and o-rings will be changed from Buna-N to Viton. Any gaskets will be changed to a higher temperature spec. Diaphragm shaft

bushes will be changed from plastic to metal, back-up diaphragms and any bumpstops will be changed to Viton.

Refer to main table on page 8 for quantities / pump.

Suction Lift 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.

HG-CF-1101 Rev. C – 19.05.06

Flanged Manifolds

FLANGED MANIFOLD PART NOS.

SUCTION

ANSI 150

MANIFOLD

VIRGIN PTFE

25-196

CONDUCTIVE PTFE

25-198

DISCHARGE

ANSI 150

MANIFOLD

VIRGIN PTFE

25-197

CONDUCTIVE PTFE

25-199

Exhaust Safety Instructions

Flooded Suction Installation

PN16

25-200

25-202

PN16

25-201

25-203

Submerged Installation

Page 10