Isolation Valves

Pressure gauge isolation valves for a controllable shut-off point at the instrument connection. Select the thread arrangement, material and rating for the duty.

1 product

Instrument Isolation Valves

From £14.43

Choosing a pressure gauge isolation valve

An isolation valve allows the gauge connection to be separated from the process as part of a suitable installation. It can simplify planned instrument checks and replacement.

Choose the connection arrangement to match the gauge and pipework. The system must also provide a safe way to release trapped pressure before the instrument is removed.

Browse all pressure gauge accessories or contact GNW for help matching the part to your installation.

Planning access and isolation

Leave enough space to operate the valve and reach the gauge connection. Check how pressure will be released and how isolation will be verified under the site's working procedure.

A shut-off valve alone should not be taken as proof that an instrument is safe to remove.

Shut-off point

Control the connection between the process and the gauge.

Connection arrangement

Match thread size and male or female ends to the installation.

Material choice

Check the valve's pressure, temperature and media specification.

Learn more

Applications

Isolation Valves can support the following tasks when selected for the duty.

Gauge maintenance

Include an isolation point within a suitable maintenance arrangement.

Instrument replacement

Plan access to the valve and gauge before installation.

New equipment

Select the valve connections around the pipework layout.

Test installations

Use a suitably rated valve where controlled shut-off is required.

How to choose

match both ends; check the rating; confirm materials; plan pressure release.

Match both ends

Confirm thread form, size and male or female arrangement.

Check the rating

Review working pressure and temperature.

Confirm materials

Match body and seal materials to the medium.

Plan pressure release

Provide suitable isolation, verification and trapped-pressure release arrangements.

Frequently asked questions

Practical answers to help with selection and replacement.

Can I remove a gauge as soon as the valve is closed?

Follow the site's isolation procedure and release trapped pressure. Closing a valve alone does not establish that removal is safe.

Which connection details matter?

Check the thread form, nominal size and male or female arrangement at both ends.

Can a valve be used with any process medium?

No. Confirm the valve body and seal materials against the fluid or gas.

What information should I provide for selection?

Send the connection details, working pressure, temperature and medium.