Sanitary connections design per DIN 11851, IDF or SMS

Type series DL1/2, DL 6/7

Sanitary connections design per DIN 11851, IDF or SMS - DL1/2, DL 6/7


  • Flush-mounted separating diaphragm of stainless steel, laser welded
  • Alternative with reinforced diaphragm in LTC technology (reduced temperature influence)
  • Volume optimised diaphragm base
  • DIN 11851 and IDF per ISO 2853 with EHEDG certificate
  • Dead-zone free design
  • System fillings for different applications
  • Measuring device connection: directly welded, directly screwed, with temperature decoupler, with capillary


  • Material certificate acc. to DIN EN 10204-3.1
  • Electropolishing (wetted parts)
  • Hygienic design with advanced surface quality
  • Special materials upon request

Technical Data

Constructional design / case
Basic body: Volume reduced diaphragm base
Material: stainless steel mat.-no. 1.4404/1.4435 (316L)
Union nut: Material: stainless steel mat.-no. 1.4301 (304)
Diaphragm: Flush-mounted diaphragm, laser welded; alternative with reduced temperature influence and reinforced diaphragm in LTC technology.
(LTC=Low Temperature Coefficient)
  Further details see general technical information TA_031.
Material wetted parts: Diaphragm: Stainless steel mat.-no. 1.4435 (316L)
Further materials upon request
  Basic body: Stainless steel mat.-no. 1.4404/1.4435 (316L)
Process connection
Design: Sanitary connections design with union nut or threaded coupling:
- DIN 11851
Nominal pressure/nominal width: See table
The sealing is not included in the scope of delivery.
Hygienic design
The surface roughness of the wetted parts made of stainless steel are executed according to EHEDG Doc.8 and ASME BPE SF3.
In case of choosing the additional feature HY, we guarantee the following surface roughness values:
Diaphragm foil: Ra ≤ 0.38 µm
Laser welds: Ra ≤ 0.76 µm
Turned parts: Ra ≤ 0.76 µm
Further versions of hygienic design upon request.
System filling
See order details; further fillings upon request.
Further details about pressure transmission fluids see general technical information TA_038.
Measuring device connection
See order details.
Material stainless steel mat.-no. 1.4301 (304)
Temperature error
In order to optimise the system we provide a detailed error calculation upon request.
See table.
Further information about diaphragm seals see general technical information TA_031.
Flame arrester MF21xx for connection of measuring devices to zone 0 see data sheet D6-025.
Type series
DL2100, DL2200, DL2300, DL2400, DL2500, DL2600, DL2700, DL1100, DL1200, DL1300, DL1400, DL1500, DL1600, DL1700, DL7100, DL7200, DL7300, DL7400, DL7500, DL6100, DL6200, DL6300, DL6400, DL6500, DL7110, DL7210, DL7310, DL7410, DL7510, DL6110, DL6210, DL6310, DL6410, DL6510


  • D5-025

    Data Sheet

  • TA_038

    Technical Information - Pressure Transmission Fluids