Specifications / 4. design and function, Design and function – WIKA Hydra-Gauge User Manual

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WIKA operating instructions HYDRA-Gauge

9015329.01 08/2013 GB/D/F/E

3. Specifications / 4. Design and function

Permissible process pressure

■

The HYDRA-Gauge is not appropriate for strong vibrations, pulsations and pressure

surges, e.g. at measuring points directly behind a pump. Appropriate pulsation dampers

and restrictor segments may be necessary.

■

The HYDRA-Gauge must not be used with aggressive ambient conditions (e.g. HCl

vapours). This may result in corrosion of the metallic parts of the HYDRA-Gauge.

For further specifications see WIKA data sheet SP 99.20 and the order documentation.

Temperature in °C

essur

e in bar

1/4" and 3/8"
1/2"
3/4"
1"

1 1/4"

only up to

25 °C

4. Design and function

4.1 Description

HYDRA-Gauge is a mechanical pressure gauge of nominal size 63 in accordance with

EN 837-1. With a special diaphragm seal system it has been adapted to the special

requirements of ultrapure media distribution systems. All wetted parts are made of PFA

or TFM (modified PTFE). Final assembly, adjustment and packaging is effected under

Laminar-Flow Class 100. Standard system fill fluid is KN 75, a 50/50 mixture of DI water and

isopropyl alcohol (IPA). Optionally DI water (KN 64) is used. Pressure gauge and diaphragm

seal are one unit and may never ever be separated as this may cause the system fill fluid to

leak, thus destroying the measuring assembly.

4.2 Scope of delivery

Cross-check scope of delivery with the delivery note.