Pressure Gauge Accessories

Pressure gauge accessories for adapting connections, mounting instruments, isolating pressure and managing pulsation or steam temperature.

Panel Mount Clamps - GNW Instrumentation

Mounting Flanges & Clamps

Isolation Valves

Protective Covers

Brass Adaptors

Stainless Steel Adaptors

Syphons

Snubbers

Collection

13 products

Rubber Gauge Covers

From £11.54

Snubbers

From £34.99

304 Stainless Steel Ring Syphons

From £57.72

Stainless Steel Adapters

£36.85

Instrument Isolation Valves

From £14.43

316 Stainless Steel Syphons

From £58.77

Brass Adapters

£22.64

Brass Ring Syphons

From £47.73

Panel Mount Clamps

From £8.86

Panel Mount Front Flange

From £8.86

PTFE Washers

From £6.86

Surface Mount Back Flange

From £11.54

U Style Syphons

From £14.43

Choosing Pressure Gauge Accessories

Pressure gauge accessories help connect, mount, isolate and protect an instrument as part of a complete installation. Each component must suit the gauge, process conditions and intended function.

Use brass adaptors or stainless steel adaptors to change connection arrangements, checking the thread form and male or female configuration on both sides. Mounting flanges and clamps must match the gauge diameter and case design.

Pressure snubbershttps://www.gnwshop.co.uk/collections/snubbers help manage rapid pressure changes, while gauge syphons reduce heat transfer on steam duties when correctly installed. Isolation valves provide a shut-off point but do not remove the need to release trapped pressure safely.

Adding an accessory can change the overall dimensions and orientation of the assembly. Confirm that the completed arrangement will fit and remain readable, or browse pressure gauges if the instrument is also required.

Selecting Accessories Safely

An accessory becomes part of the pressure-containing assembly. Check its thread form, pressure rating, temperature limit and material compatibility rather than selecting on appearance alone.

Adaptors change the connection arrangement but cannot correct an unsuitable gauge range or wetted material. Mounting parts must match the case diameter and fixing dimensions.

Isolation valves, snubbers and syphons each perform different tasks. The completed installation and working procedure must allow trapped pressure to be released safely before maintenance.

Connection and Sealing

Use compatible adaptors and sealing components to match the instrument to the process connection.

Mounting and Protection

Choose flanges, clamps and covers around the gauge model, case diameter and required clearances.

Pressure and Temperature Control

Snubbers, syphons and isolation valves address different installation conditions and must be selected for the duty.

Learn more

Applications

Choose each accessory for a defined connection, mounting, isolation or protection requirement within the complete gauge installation.

New installations

Select the fittings and mounting parts needed to connect and position the gauge.

Instrument replacement

Match existing threads and fixing dimensions when replacing an instrument.

Steam and pump duties

Choose protection around the temperature or pulsation at the measuring point.

Routine maintenance

Use suitable isolation and pressure-release arrangements when servicing a gauge.

How to Choose

Identify the required function, check dimensions and thread forms, review process conditions and confirm safe installation requirements.

Identify the task

Decide whether you need connection, sealing, mounting, isolation or protection.

Check the fit

Match threads for fittings and case dimensions for mounting parts or covers.

Review the duty

Check pressure, temperature and medium for components exposed to the process.

Check installation requirements

Allow room for fitting, operation and safe maintenance.

Frequently asked questions

Practical answers to help with selection and replacement.

Are BSP and NPT fittings interchangeable?

No. Check the exact thread form and use an appropriate adaptor when a conversion is needed.

What is the difference between a snubber and a syphon?

A snubber restricts rapid pressure changes. A primed syphon provides a condensate barrier that helps reduce heat transfer on steam duties.

Can an isolation valve make gauge removal safe?

A valve alone is insufficient. The arrangement and procedure must isolate the instrument and release trapped pressure.

How do I choose a cover or flange?

Match the gauge model, case diameter and relevant fixing or clearance dimensions. Pressure-connection size alone will not establish the fit.