Siemens SITRANS P Bedienungsanleitung PDF herunterladen (Seite 179)

SITRANS P measuring instruments for pressure

Quick-release clamp-on seals

For pressure and absolute pressure

2/179

Siemens FI 01 · 2009

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Overview

Quick-release clamp-on seals, to DIN 11851 with threaded socket

Quick-release clamp-on seals, with clamp connection

Quick-release clamp-on seals for pressure are available for the

following SITRANS P pressure transmitter series:

• P300

• DS III

• DS III PA

• DS III FF

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Application

The quick-release clamp-on seal is a special design for flowing

media and high-viscosity media. Since it is completely inte-

grated in the process pipe, no turbulences, dead volumes or

other obstructions to the flow occur. The measured medium

flows unhindered through the clamp-on seal and results in self-

cleaning of the measuring chamber. Furthermore, the clamp-on

seal can be cleaned by a pig.

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Design

The quick-release clamp is available in two versions:

• DIN 11851 with threaded socket

• Clamp connection

The clamp-on seal is connected to the pressure transmitter ei-

ther directly or by way of a capillary.

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Function

The measured pressure is transferred from the diaphragm,

mounted on the inner circumference of the clamp-on seal, to the

filling liquid and then passes through the capillary to the measur-

ing chamber of the pressure transmitter. The interior of the

clamp-on seal and of the capillary, as well as the measuring

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

ing liquid.

Note:

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

sioning, it is recommended to use a vacuum-proof pressure

transmitter (see Selection and Ordering data).

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Technical specifications

Clamp-on seals of quick-release design for pressure

Connection Nominal

diameter

Nominal

pressure

• To DIN 11851 with threaded

socket

DN 25 PN 40

DN 40 PN 40

DN 50 PN 25

DN 65 PN 25

DN 80 PN 25

DN 100 PN 25

• Clamp connection 1½ inch PN 40

2 inch PN 40

2½ inch PN 40

3 inch PN 40

Material

• Main body Stainless steel 1.4404/316L

• Diaphragm Stainless steel 1.4404/316L

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 • Food oil (FDA listed)

• Glycerin/water (not suitable for

use in low-pressure range)

Permissible ambient temperature Dependent on the pressure trans-

mitter and the filling liquid of the

remote seal

More information can be found in

the technical data of the pressure

transmitters and in the section

"Technical data of filling liquid" in

the Technical description to the

remote seals

Weight Approx. 4 kg (approx. 8.82 lb)

Certificate and approvals

Classification according to pres-

sure 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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