JAA / JAF / JAG
Pneumatic indicating controllers for pressure and temperature, with P, PI, PID or ON/OFF functions. Pneumatic signal: 20–100 kPa / 0.2–1 bar / 3–15 psi; nominal air supply: 1.4 bar.
ABB Campo / Deltapi N
Pneumatic controllers and transmitters
An established technology that remains useful and in demand. These instruments measure, transmit and control process variables without local electronics, using standard pneumatic signals.
Deltapi N · NAA / NAB / NAD / NDA / NDB / NDD
Deltapi N pneumatic transmitters: NAA, NAB, NAD and NDA for differential pressure; NDB for gauge pressure; NDD for gauge pressure with a remote seal. Model-specific datasheets and shared family manuals.
Remote seals
NAE: pneumatic DP with remote seals
When the process fluid must not reach the measuring capsuleNAE uses two diaphragm seals and filled capillaries to transmit differential pressure to the pneumatic body. Useful for corrosive or viscous fluids and remote connections, with the same considerations as other remote seals: capillaries, temperature, zero elevation or suppression and symmetry.
When to use it / when to consider alternatives
Does a pneumatic architecture still make sense?
It makes sense for
- a fully pneumatic installed base
- established maintenance and spare-parts arrangements
- independence from local electrical power
- simple, well-understood functions
Consider modern electronics for
- diagnostics and asset management
- digital DCS integration and historical data
- costly or problematic instrument air
- reduced tubing and pneumatic leakage
Best practice
Instrument air and tubing are part of the measurement system
Water, oil and particles affect relays, nozzle/flapper mechanisms and restrictions. Filtration and regulation are essential.
Even a small leak in long tubing can affect zero, dynamics and air consumption.
Length and pneumatic volume introduce delay. Avoid unnecessary coils and undersized tubing.
Follow the model instructions, especially for DP transmitters and controllers with mechanical elements.
On Deltapi N, perform elevation, suppression and static alignment according to the manual.
Pneumatic P/PI/PID requires tuning matched to the process and valve. Excessive gain causes hunting.
Families we support
ABB installed base
NDANAENDBNDDNAANABNADJAAJAFJAG
For new supply or replacement, we check the full code, measuring element, range, pneumatic signal, air supply, process connections and materials. Prefixes do not all identify the same function.
ABB documentation
ABB datasheets and manuals
Download the documents for your model. Shared manuals, protocols and versions are identified in each document card.
JAA / JAF / JAG · Campo
Pneumatic pressure and temperature indicating controllers.
NAA / NAB / NAD · differential pressure
One datasheet per model; shared OI/NAX manual.
NDA · differential pressure
Shared NDA / NDB / NDD manual: select the instructions relevant to the model.
NDB · gauge pressure
Gauge pressure transmitter with shared OI/NDX manual.
NDD · gauge pressure with diaphragm seal
Dedicated NDD remote-seal datasheet and shared OI/NDX manual.
NAE · differential pressure with remote seals
Dedicated datasheet and manual for NAE with remote seals.
Request a quotation
Identify or configure your pneumatic instrument
Technical FAQ
Pneumatic instrumentation FAQ
Why still use a pneumatic controller?
To maintain a fully pneumatic installed base, avoid unnecessary electronic conversions or preserve an established plant approach that is easy to maintain locally.
What is the standard pneumatic signal?
ABB Campo/Deltapi families typically support 0.2–1 bar, 20–100 kPa or 3–15 psi. Check signal and air supply for the specific model.
Are JAA, JAF and JAG only indicators?
No. They are pneumatic indicating controllers with P, PI, PID or ON/OFF functions depending on configuration.
What do NAA/NAB/NAD measure?
They are Deltapi N pneumatic differential pressure transmitters for DP, level and flow. Different versions cover different ranges.
What is NAE used for?
NAE is a Deltapi N version with remote diaphragm seals, for applications where process fluid must not reach the measuring capsule directly.
What causes instability in a pneumatic loop?
Dirty or wet air, leaks, excessive tubing length, restrictions, dirty nozzle/flapper mechanisms, incorrect controller tuning or valve mechanics.