Siemens SITRANS P Manual de usuario descargar pdf (Pagina 176)

SITRANS P measuring instruments for pressure

Clamp-on seals of flange design

For gage pressure, differential pressure and flow

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Siemens FI 01 · 2009

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Overview

Clamp-on seals for flange-mounting

The clamp-on seal is completely integrated in the process line.

It is particularly suitable for flowing and highly viscous media.

The clamp-on remote seal consists of a cylindrical jacket into

which a thin-walled pipe is welded. It is clamped directly be-

tween two flanges in the pipeline.

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Design

• Clamp-on seals for flange-mounting (flange design) to

EN/ASME for SITRANS P pressure transmitters

- For pressure: P300, DS III, DS III PA and DS III FF series

- For differential pressure and flow: DS III, DS III PA and

DS III FF

• Sealing face to EN 1092-1 or ASME B16.5

• Connection to the transmitter directly or by means of a flexible

capillary (max. 10 m long)

• See Technical data for details of materials used for the wetted

parts

• Material used for the capillary, the guard sleeve, the seal’s

main body and the measuring cell: Stainless steel,

mat.-No. 1.4571

• Filling liquid: Silicone oil, high-temperature oil, halocarbon oil,

food oil (FDA listed) or glycerin/water (not suitable for uses in

low-pressure range)

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Function

The measured pressure is transferred from the diaphragm to the

filling liquid and passes either directly or through the capillary to

the measuring chamber of the pressure transmitter. The interior

of the diaphragm seal and of the capillary, as well as the mea-

suring chamber of the pressure transmitter, are filled gas-free by

the filling liquid.

Note:

When operating in the low-pressure range, also during commis-

sioning, it is recommended to use a vacuum-proof remote seal

(see Selection and Ordering data).

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Technical specifications

Clamp-on seals for flange-mounting

Nominal diameter Nominal pressure

• DN 25 PN 6 ... PN 100

• DN 40 PN 6 ... PN 100

• DN 50 PN 6 ... PN 100

• DN 80 PN 6 ... PN 100

• DN 100 PN 6 ... PN 100

• 1 inch Class 150 ... class 2500

• 1½ inch Class 150 ... class 2500

• 2 inch Class 150 ... class 2500

• 3 inch Class 150 ... class 2500

• 4 inch Class 150 ... class 2500

Process connection Flange to EN 1092-1 or

ASME B 16.5

Sealing face To EN 1092-1, form B1 or to

ASME B16.5 RF 125 ... 250 A or

RFSF

Materials

• Main body Stainless steel 1.4404/316L

• Diaphragm Stainless steel 1.4404/316L

• Wetted parts Stainless steel 1.4404/316L

• Without foil

• ECTFE coating

• PFA coating (for vacuum on re-

quest)

Monel 400, mat. No. 2.4360

Hastelloy C276, mat. No. 2.4819

Hastelloy C4, mat. No. 2.4610

Tantalum

• Capillary Stainless steel, mat.

No. 1.4571/316Ti

• Sheath Spiral hose made of stainless

steel, mat. No. 1.4301/316

Capillary

• Length Max. 10 m (32.8 ft)

• Internal diameter 2 mm (0.079 inch)

• Minimum bending radius 150 mm (5.9 inch)

Filling liquid Silicone oil M5

Silicone oil M50

High-temperature oil

Halocarbon oil

Food oil (FDA listed)

Glycerin/water (not suitable for

uses in low-pressure range)

Permissible ambient temperature See pressure transmitters, see fill-

ing liquid

Weight Approx. 4 kg (8.82 lb)

Certificates and approvals

Classification according to pressure

equipment directive

(DRGL 97/23/EC)

For gases of fluid group 1 and liq-

uids of fluid group 1; complies

with the requirements of article 3,

paragraph 1 (appendix 1);

assigned to category III, confor-

mity evaluation module H by the

TÜV Nord

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