2-valve manifolds
Isolation and venting or testing for gauge and absolute pressure instruments.
Installation and protection
Pressure instrument accessories
The right accessory affects safety, maintenance, measurement stability and instrument life. Geyser IC supports selection of manifolds, valves, siphons, condensate pots, dampers, fittings and other installation components.
Accessories and instrument:
the configuration is defined together with the main instrument. We can supply accessories for
pressure transmitters, pressure gauges and pressure switches, with particular attention to chemical compatibility, pressure, temperature and future maintenance.
Examples
Typical accessories for pressure measurement points
5-valve manifolds
Isolation, equalisation, testing and purging for differential pressure transmitters.
Siphons
Thermal protection for instruments in steam and hot-fluid applications.
Flushing / drainage rings
Installed between the diaphragm seal and process connection to facilitate flushing, purging and cleaning without removing the instrument.
Main families
Which accessory do you need?
2-, 3- and 5-valve manifolds
For transmitter isolation, venting, equalisation and testing. The right manifold depends on instrument type and maintenance strategy.
2 valves → typical for gauge or absolute pressure
3 valves → typical for differential pressure transmitters
5 valves → DP with additional test or purge functions
Root valves / needle valves / gauge valves
Isolation and service valves for gauges, switches and transmitters. Selection considers pressure, temperature, fluids, materials and connections.
Siphons and cooling elements
Protect mechanical instruments from high temperatures, particularly in steam service. A siphon creates a thermal barrier using condensate.
Condensate pots
Primarily used in steam impulse lines to stabilise condensate columns and improve measurement repeatability.
Dampers, snubbers and restrictors
For pulsating pressure, water hammer or process vibration. They help protect sensors and improve readability of mechanical instruments.
Flushing / drainage rings
Installed between the diaphragm seal and process connection, they allow flushing, purging and cleaning without removing the instrument.
Fittings, adapters and installation hardware
Reducers, nipples, threaded adapters, compression fittings and components connecting the instrument mechanically to the process.
Quick guide
Selecting accessories for the instrument
| Instrument | Common accessories | Main consideration |
|---|---|---|
| Pressure gauge | Gauge valve, siphon, damper, cooling element | Vibration, pulsation and fluid temperature |
| Pressure switch | Root valve, siphon, snubber, fittings | Sensor protection and setpoint access |
| Gauge / absolute pressure transmitter | 2-valve manifold, root valve, fittings | Safe isolation and ease of maintenance |
| Differential pressure transmitter | 3- or 5-valve manifold, condensate pots, impulse lines | Equalisation, drainage, venting and installation symmetry |
Typical applications
Three practical examples
We normally consider a siphon or cooling element to prevent direct exposure of the instrument to pipe temperature.
A 3- or 5-valve manifold simplifies isolation, equalisation and maintenance of the differential pressure transmitter.
A snubber or damper can improve stability and service life, especially for mechanical instruments.
Diaphragm seals
Do you need to isolate the sensor from the process?
Diaphragm seals have a dedicated page because seal, capillary and fill-fluid selection directly affects instrument performance.
Explore transmitters with diaphragm sealsInstallation components
We can quote accessories together with the instrument
Send a P&ID, installation photograph or measurement-point description so we can configure a consistent instrument and accessory package.
Replacement and retrofit
Replacing manifolds, valves and other accessories
Send us photographs, connections, pressure, temperature, material and required function. We can propose replacements for existing components or update the installation alongside a new instrument.
Request a quotation
Accessory configuration
If the accessory is associated with a specific instrument, identify it in the form.
FAQ
Pressure accessories FAQ
When is a 2-valve manifold needed?
It is normally used with gauge or absolute pressure instruments for isolation and venting or testing. Differential pressure transmitters more commonly use 3- or 5-valve manifolds.
What does a 3- or 5-valve manifold do?
It isolates and equalises a differential pressure transmitter. A 5-valve version also permits testing or purging on both sides.
When is a siphon used?
Mainly with steam or hot fluids to protect gauges and switches by creating a condensate column that reduces the temperature at the instrument.
What does a condensate pot do?
A condensate pot is used in differential measurements on steam or hot gases to stabilise condensate columns in the impulse lines.
When is a damper or snubber needed?
It is useful for pulsating or shock pressure, protecting gauges and switches and improving reading stability.
Are diaphragm seals accessories?
They are important process accessories, but have a dedicated Geyser page because the seal directly affects instrument sizing.
How do I select the right accessory?
At minimum, we need instrument type, fluid, pressure, temperature, connections, required function and installation conditions.
ABB M26 manifold documentation
For M26 manifolds used with ABB transmitters: check configuration and connection compatibility.
M26 · Datasheet PDF EN