Diaphragm seal MD 81 Tubus flange version

Data sheet Diaphragm seal MD 81 Tubus flange version

Benefits

For tanks with thick walls
For higher block flanges and increased insulation
Connection as per DIN or ASME
Tubus length can be adapted as required

Application

For mounting to Bourdon tube pressure gauges, pressure transducers or pressure switches. For corrosive, highly viscous, polluted, crystallising or hot media. Ideal for insulated or thick-walled tanks. Specially designed for use in the chemical and petrochemical industries, in refineries or power plant engineering.

Versions

flange connection as per ASME B 16.5 (Raised Face)

Process connection	Instrument connection	Nominal pressure	Minimum range* (in bar) at nominal size					Part no.	Remember
	Instrument connection	Nominal pressure	63	100	160	DMU	DMU 13 Vario	Part no.	Remember
1"	Welded connection	CL 150	4 bar	4 bar	–	1 bar		31938W
2"	Welded connection	CL 150	1 bar	2.5 bar	–	1 bar	On request	31929W
3"	Welded connection	CL 150	0.6 bar	0.6 bar	1 bar	1 bar	On request	31931W

Blue part no. = in-stock items

flange connection as per EN 1092-1 type B 1

Process connection	Instrument connection	Nominal pressure	Minimum range* (in bar) at nominal size					Part no.	Remember
	Instrument connection	Nominal pressure	63	100	160	DMU	DMU 13 Vario	Part no.	Remember
DN 50	Welded connection	PN 40	1 bar	2.5 bar	–	1 bar	On request	31917W
DN 80	Welded connection	PN 40	0.6 bar	0.6 bar	1 bar	1 bar	On request	31921W
DN 100	Welded connection	PN 40	0.6 bar	0.6 bar	1 bar	1 bar	On request	31924W

Blue part no. = in-stock items

Downloads

	Description	Format
Data sheet Diaphragm seal MD 81 Tubus flange version	Data sheet	PDF
DMU 13 Vario	Level indicators and level controllers	PDF
Enquiry chemical seals	Product range industrial technology	PDF
Enquiry chemical seals	Checklists	PDF
STP file (3D) MD81_31938W	CAD file	STP
STP file (3D) MD81_31929W	CAD file	STP
STP file (3D) MD81_31931W	CAD file	STP
STP file (3D) MD81_31917W	CAD file	STP
STP file (3D) MD81_31921W	CAD file	STP
STP file (3D) MD81_31924W	CAD file	STP
Fitting of / combination possibilities of AFRISO pressure gauges and chemical seals	CAD filePressure measuring instruments	PDF
NA Diaphragm seal MD 80 Flange version	Options	PDF

Technical data

Process connection/tubus

Stainless steel 316 L Flange connection as per ASME B 16.5 (Raised Face) or as per EN 1092-1 type B 1

Tubus length:

50 mm

Diaphragm

Stainless steel 316 L
Welded

Sealing surface

Stainless steel 316 L

Instrument connection

Welded connection

Pressure transmission liquid

Paraffin oil (FM 09), FDA-listed

Pressure range

See overview of versions

Nominal pressure

CL 150, PN 40

Options

Process connection

Other tubus lengths
Special materials/coatings
Other sealing surfaces

Diaphragm

Special materials: Hastelloy, Monel, nickel, Inconel, Incoloy, platinum, titanium, tantalum, zirconium, other chrome-nickel-steel alloys
Coatings/linings: PFA (up to 250 °C), ECTFE (up to 150 °C), PTFE (up to 150 °C, up to 100 bar), silver (up to 150 °C), gold (up to 200 °C)

Other

Adapter for instrument connection G¼B/G½B
Capillary tube (back or bottom)
Cooling element (> 100 °C)
Other filling liquids
Customer-specific flanges
Other nominal diameters

Technical drawings

Click the corresponding image for detail views, additional information and dimension tables.

Type MD 81 – flange connection as per ASME B 16.5

Dimensions (mm):

DN	CL	D	d1	d2	d3	d4	H	h
1"	150	108	51	79,5	4x16	25	14,5	1,5
2"	150	152	92	121	4x19	48	19	1,5
3"	150	190	127	152	4x19	76	24	1,5

Type MD 81 – flange connection as per EN 1092-1 type B 1

Dimensions (mm):

DN	PN	D	d1	d2	d3	d4	H	h
50	40	165	102	125	4x18	48	20	3
80	40	200	138	160	8x18	76	24	3
100	40	235	162	190	8x22	94	24	3