Flange-type with diaphragm extension, general applications

Type series DB1120

Flange-type with diaphragm extension, general applications - DB1120


  • Flush-mounted separating diaphragm of stainless steel or special material
  • Volume optimised diaphragm base
  • Dead-zone free design
  • Extension length 50, 100, 150, 200 mm or special lengths
  • System fillings for different applications
  • Connection of measuring instrument; directly welded, directly screwed, with temperature decoupler, with capillary


  • Material certificate acc. to EN 10204-3.1

Technical Data

Constructional design / case
Basic body: Volume reduced diaphragm base
  Material: stainless steel mat.-no. 1.4404/1.4435 (316L)
Diaphragm: Flat diaphragm
Material wetted parts: Diaphragm: See order details
  Basic body: Stainless steel mat.-no. 1.4404/1.4435 (316L)
Process connection
Design: Flange-type with diaphragm extension
Flange connections per EN 1092-1 and ASME B 16.5, welded with the extension
Extension length (standard): 50, 100, 150, 200 mm
Special lengths upon request
Nominal pressure/Nominal width: See table
The sealing is not included in the scope of delivery.
Sealing surfaces
- EN 1092-1, model B1, B2, C, D
- ASME B 16.5, RFSF, RF 125-250AA, RJF
With special material surface upon request.
Measuring device connection
See order details.
Material stainless steel mat.-no. 1.4301 (304)
System filling
See order details; further fillings upon request.
Further details about pressure transmission fluids see general technical information TA_038.
Temperature error
In order to optimise the system we provide a detailed error calculation upon request.
Tests and certificates
Connection to Zone 0: with flame arrester, IIG IIC according to PTB 03 ATEX 4032 X
With measuring device connection G1/2:
DN 80: approx. 6.5 kg
DN 1" (150 psi): approx. 1.8 kg
DN 2" (300 psi): approx. 5.1 kg
Further weights upon request.
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
DB1, DB2, DB4, DB3, DB5, DB51, DB6


  • D5-031

    Data Sheet

  • TA_038

    Technical Information - Pressure Transmission Fluids