Siemens SITRANS P Bedienungsanleitung PDF herunterladen (Seite 190)

SITRANS P measuring instruments for pressure

Fittings

Technical description

2/190

Siemens FI 01 · 2009

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Overview

All 21-off fittings can be secured onto walls, racks (72 mm grid)

and vertical and horizontal pipes.

This offers the advantage when assembling a plant that the shut-

off fittings can be secured first and the lines for the medium and

differential pressure connected to them. It is then possible to

check all connections for leaks and to blow out or flush the pipes

in order to remove dirt (welding residues, shavings etc.).

The measuring instruments can be screwed onto the shut-off fit-

tings right at the end when all piping has been completed.

If an instrument has to be removed for maintenance, the fittings

and pipes remain as they are. It is only necessary to close the

valves – the instrument can then be removed, and refitted follow-

ing maintenance.

Classification according to pressure equipment directive

(DGRL

97/23/EC):

For gases of fluid group 1 and liquids of fluid gr

oup 1; compli-

ance with r

equirements of ar

ticle 3, paragraph 3 (sound engi-

neering practice).Siemens FI 01 · 2009

New standard DIN EN 61518

The flange connection between transmitter and valve manifold

was modified in the new standard DIN EN

61518. The only con-

nection thread approved for use in the process flanges of the

pressure transmitter is

-20 UNF.

The valve manifolds for M12 screws, including the accessory

sets, have therefore been deleted.

Material acceptance test certificate to EN 10204-3.1

If a material acceptance test certificate to EN 10204-3.1 is re-

quir

ed when ordering valve manifolds or shut-of

f fittings, please

note that a single certificate is sufficient for each ordered item

type. This means that you will only be charged for one certificate

in the cost calculations.

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Pressure transmitters with shut-off fittings - mounting examples

SITRANS P transmitter for gage pressure with double shut-off valve,

SITRANS P pressure transmitter with multiway cock or 3-spindle valve

manifold

SITRANS P transmitter for differential pressure with 3-way valve manifold,

3-spindle valve manifold or valve manifold combination DN 5/DN 8

SITRANS P pressure transmitter for differential pressure, mounted in pro-

tective box (available on request)

SITRANS P pressure transmitter mounted on valve combination

"Monoflange" for direct connection to flanges (available on request)

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