Design for VARIVENT in-line access unit, EHEDG certified

Type series DL8080

Design for VARIVENT in-line access unit, EHEDG certified - DL8080


  • Flush-mounted separating diaphragm of stainless steel, laser welded
  • Alternative with reinforced diaphragm in LTC technology (reduced temperature influence)
  • Volume optimized diaphragm base
  • EHEDG-certified
  • 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)
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)
System filling
See order details; further fillings upon request.
Further details about pressure transmission fluids see general technical information TA_038.
Process connection
Design: VARIVENT inline access unit
  - D = 31 for Varivent case, DN 10 and DN 15
- D = 50 for Varivent case, DN 25 and 1"
- D = 68 for Varivent case, DN 40…DN 125 and 1 1/2"…6"
Nominal pressure: Dependent on inline access unit
  DN 25 / 1“, PN 25 bar
DN 40-80, PN 25 bar
DN 1 1/2“ - 3“, PN 25 bar
DN 100 / 4“, PN 20 bar
DN 125 / 6“, PN 10 bar
The sealing is not included in the scope of delivery.
Measuring device connection
See order details.
Material stainless steel mat.-no. 1.4301 (304)
Hygienic design
The wetted surfaces made of stainless steel are executed according to EHEDG Doc.8 and ASME BPE SF3 (Code: 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.
Temperature error
In order to optimise the system we provide a detailed error calculation upon request .
With measuring device connection G1/2
D = 31: ca. 0.3 kg
D = 50: ca. 0.6 kg
D = 68: ca. 0.8 kg
Further information about diaphragm seals see general technical information TA_031.
Type series


  • D5-024-1

    Data Sheet

  • TA_031

    Technical Information - General Information

  • TA_038

    Technical Information - Pressure Transmission Fluids


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