Syphons

Pressure gauge syphons for steam and hot-process installations. Compare ring and U-style designs, materials and connection options.

4 products

U Style Syphons

From £14.43

304 Stainless Steel Ring Syphons

From £57.72

Brass Ring Syphons

From £47.73

316 Stainless Steel Syphons

From £58.77

Choosing a pressure gauge syphon

A correctly installed and primed syphon holds a condensate barrier between steam and the gauge. This helps reduce the temperature reaching the instrument.

Choose the shape around the installation space and orientation, then confirm the material and connection. The range includes brass and stainless-steel ring designs, stainless-steel options and U-style syphons.

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

Temperature at the gauge

Select a syphon and installation arrangement that keep the gauge within its temperature limit. Follow the product instructions for orientation and priming.

A syphon does not raise the gauge's pressure rating. Check the complete assembly for the working pressure and temperature.

Condensate barrier

A primed syphon helps limit heat transfer from steam to the instrument.

Installation shapes

Compare ring and U-style options against the available space.

Material selection

Choose the specified metal for the process and operating conditions.

Learn more

Applications

Syphons can support the following tasks when selected for the duty.

Steam pressure indication

Help protect a suitable gauge from direct steam temperature.

Boiler plant

Select a rated syphon for the pressure measuring arrangement.

Instrument replacement

Match the original connection and review temperature protection.

Equipment installation

Allow room for the syphon shape and gauge access.

How to choose

check the duty; select the material; choose the layout; confirm the connections.

Check the duty

Confirm pressure, temperature and gauge temperature limits.

Select the material

Review compatibility and the product's rating.

Choose the layout

Check shape, orientation and available clearance.

Confirm the connections

Match both thread ends and follow the priming instructions.

Frequently asked questions

Practical answers to help with selection and replacement.

Why is a syphon used with a steam gauge?

Its condensate barrier helps reduce heat reaching the gauge.

Does it need priming?

Follow the product's installation and priming instructions so the intended barrier is established.

How do I choose ring or U style?

Use the specified installation orientation and available space, then compare the connection and rating.

Can I use it above the gauge's pressure rating?

No. Every component in the assembly must be suitable for the working pressure.