Chemical Seals

Diaphragm seals, in-line seals or capsule seals extend the application range of Bourdon tube pressure gauges, pressure transmitters and others, also for differential pressure measurements. The diaphragm separates the medium from the measuring unit. A suitable filling fluid is responsible for the pressure transmission.

Chemical seals meet high hygienic requirements that correspond to the standards of the EHEDG and 3A certificates. We offer a wide range of special materials for the wetted parts such as Hastelloy, Monel, tantalum, titanium and gold.

We gladly mount your provided instruments (transmitters, pressure switches, etc.) to our chemical seals. With our chemical seals and in coordination with you, we can offer ideal process-sided solutions.

Diaphragm seals

3-part

MDM 7210vd8 
male thread  
or flange
PN 40 
Details DS 7210
T07-000-021 Membran-Druckmittler 7210.L Leichte Ausführung 7210.LvG½
MDM 7210.L 
female thread G ½  
or orifice d8
PN 100 
Details DS 7210.L
MDM 7211 
male thread  
or flange
PN 250 
Details DS 7211

2-part

MDM 7280 
female thread 
PN 600 
Details DS 7280

Diaphragm seals for food / bio / pharmaceutical industry

For flat sealing and form sealing

MDM 73..vd8 
DIN 11851 
APV RJT 
ISO 2853 (IDF) 
SMS 
DS 722 
DRD 
Clamp ISO 2852 
            DIN 32676 
Tri-Clamp 
PN 10 to 40 

Details DS 7300

For O-ring sealings

MDM 73..vd8 
MDM 73.. 
SÜDMO (W 500 D) 
APV In-line 
NEUMO BioControl® 
Varivent® for Varinline®-case 
Clamp DIN 32 676 series C 
PN 16 to 60 

Details DS 7301
MDM 73..vd8 
MDM 73.. 

DIN 11 864-1 
DIN 11 864-2 
DIN 11 864-3 
PN 16 to 40 



Details DS 7302
MDM 73..vd8 
MDM 73.. 
NEUMO BioConnect® 
PN 10 to 16 
Details DS 7303

For homogenizers

MDM 7390 

PN 600 
Details DS 7390

Mini seals

With thread connection

MDM 7410 
male thread  
thread cylindrical 
PN 600 
Details DS 7400
MDM 7420 
male thread  
thread conical 
PN 600 
Details DS 7400
MDM 7450 
union nut 
thread cylindrical 
PN 40 to 600 
Details DS 7400

Flange type chemical seals

MDM 7510 
DIN EN flanges 
PN 10 to 400 
Details DS 7500
MDM 7520 
ASME flanges 
Class 150 to 2500 
Details DS 7500
MDM 7511 
DIN EN small flange 
PN 10 to 40 
Details DS 7501
MDM 7521 
ASME small flange 
Class 150 to 300 
Details DS 7501
MDM 7515 
DIN EN flange with extension 
PN 10 to 40 
Details DS 7502
MDM 7525 
ASME flange with extension  
class 150 to 300 
Details DS 7502

Cellular type chemical seals

MDM 7550 
DIN EN 
PN 16 to 400 
Details DS 7505
MDM 7560 
ASME 
Class 150 to 2500 
Details DS 7505
MDM 7555 
DIN EN with extension 
PN 16 to 100 
Details DS 7505
MDM 7565 
ASME with extension 
Class 150 to 300 
Details DS 7505

In-line seals for food / bio / pharmaceutical industry

For flat sealings and form sealings

RDM 763.. 
DIN 11851 
APV RJT 
ISO 2853 (IDF) 
SMS 
Clamp ISO 2852 
            DIN 32676 
Tri-Clamp 
PN 10 to 40 
Details DS 7630

For O-ring sealings

RDM 763.. 
DIN 11864-1 
DIN 11864-2  
DIN 11864-3 
Neumo Bioconnect® 
PN 10 to 40 
Details DS 7630

In-line seals

Flange type and cellular type

RDM 7690.1 
flange type according to DIN EN 
PN 10 to 40 
Details DS 7600
RDM 7695.1 
flange type according to ASME 
Class 150 to 300 
Details DS 7600
RDM 7690 
cellular type according to DIN EN 
PN 10 to 400 
Details DS 7600
RDM 7695 
cellular type according to ASME 
Class 150 to 2500 
Details DS 7600

Special chemical seals

Plastic chemical seals, 3-part

MDM 7190 

female thread 


PN 10 
Details DS 7190

For pulp and paper industries

MDM 7590 
pulp connection DN 48 
PN 40 
Details DS 7590

Compact type for aggressive media

MDM 7910v 
MDM 7980v 
male thread G ½ B 
male thread ½'' NPT 

7910v...   PN 250 
7980v...   PN 600 


Details DS 7935

Compact type for high pressure applications

MDM 7952 
MDM 7952.1 
high pressure female thread  
female thread NPT 
PN 1000 
Details DS 7952

In-line seals with cutting ring fitting

RDM 7680 
cutting ring fitting 
L 12 or L 28 
PN 250 
Details DS 7680

Capsule seals

TDM 7710 

union nut 


PN 600 
Details DS 7710

Recommendation for bourdon tube pressure gauges

Bourdon tube pressure gauges, bayonet ring case stainless steel, DW-Line (Double Weld)

RCh 63-3vDW / RChG 63-3vDW 
without or with case filling  
nominal size: 63 (2½") 
Details DS 1211.7
RCh ...-3vDW / RChG ...-3vDW 
without or with case filling  
nominal size: 100 (4"), 160 (6") 
Details DS 1201.7

Accessory

Flushing ring, cooling element, capillary lines

Flushing ring  


Details DS 7.7001

Cooling element 


Details DS 7.7002
7.7003 FL Fernleitung verschraubt Armaturenbau Manotherm zur Entkopplung des Druckmessgerätes von der Messstelle

Capillary lines


Details DS 7.7003

Process connection pieces

Thread connection pieces 
Conical couplings / welding males 
Clamp connection pieces 
Clamps 
Sealings 
Details