» Articles » LABOM’s new DD8040 series plastic diaphragm seals excel in aggressive and difficult media

LABOM’s new DD8040 series plastic diaphragm seals excel in aggressive and difficult media

The new DD8040 series of plastic diaphragm seals from German measurement experts, LABOM, offers a cost-effective pressure measurement solution for measuring solid-free, neutral, and aggressive liquid media.

PIF_LABOM's new DD8040 series plastic diaphragm

Advantages of LABOM's DD8040 series

When measuring solid-free, neutral, and aggressive liquid media, the plastic diaphragm seal offers a technologically useful additional option that complements the LABOM portfolio of stainless steel diaphragm seals.

Thus, it enables a cost-efficient solution for pressure measurement in the fields of wastewater treatment, semi-conductor technology, electroplating, and chemical plant construction.

Features of the DD8040 series

The DD8040 features an EPDM diaphragm, coated with PTFE on the side in contact with the medium and synthetic oil is used as the filling liquid.

The top part of the body, which contains the connection for the measuring device, is made of orange-coloured polypropylene reinforced with glass-fibre (colour code RAL 2004).

The bottom part with the process connection is available in several versions. Depending on the basic material, the DD8040 diaphragm seal is suitable for various temperature ranges.

The PVC-U version can be used between 0 and 60 degrees Celsius, the PP version between 10 and 80 degrees Celsius, and the PVDF version from minus 30 to 120 degrees Celsius, with the exact temperature ranges depending on the process pressure being measured.

DD8040 is available with a G1/2” or G1/4” inside thread for the process connection. It is particularly suitable for use with mechanical pressure measurement devices, typically manometers with 100-millimetre or 63-millimetre connections. Optionally, it can also be supplied in combination with a pressure transmitter.

PIF's verdict

LABOM's DD8040 series is a versatile solution that is more than capable of handling aggressive and difficult media. Ideal for pressure measurement applications across a multitude of different fields, and temperature ranges, these plastic diaphragm seals are highly competitive, both in terms of performance and cost.

Company Profile


For over 40 years LABOM has been one of the leaders in quality for industrial pressure and temperature measurement technology.

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