Siemens P Clamp-on seals of flange design, For gage pressure, differential pressure and flow, 176

© Siemens AG 2008

SITRANS P measuring instruments for pressure

Clamp-on seals of flange design

For gage pressure, differential pressure and flow

■Overview

2

■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

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.

■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)

■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).

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	For gases of fluid group 1 and liq-
equipment directive	uids of fluid group 1; complies
(DRGL 97/23/EC)	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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Siemens FI 01 · 2009