ABB Absolute pressure transmitter with remote diaphragm seal PAD100

Overview

The ABB PAD100 is an absolute pressure transmitter with a remote diaphragm seal, engineered for demanding industrial pressure monitoring where the process media is too aggressive, viscous, or hot for direct sensor contact. The remote diaphragm seal system physically isolates the pressure sensor from the process, transmitting pressure through a fill fluid instead – the defining distinction between the PAD100 and a direct-mount transmitter like the sanitary PAF100.

Seven Star LLC supplies the ABB PAD100 to chemical, oil and gas, power, and pharmaceutical operators across Oman and the wider GCC with genuine ABB instrumentation.Seven Star LLC supplies this item on request with the manufacturer documentation, and availability and lead time are confirmed at quotation.

Operating Principle

The remote seal prevents direct media contact with the pressure sensor, protecting it from corrosion and thermal stress while maintaining fast response times and excellent repeatability – the seal transmits pressure hydraulically through a fill fluid in a capillary line, so the sensor itself never touches the aggressive or high-temperature process media. This remote-mounting capability is essential where the harsh media or physical inaccessibility of the measurement point would make a direct-mount transmitter impractical or unsafe to service. Accuracy extends to 0.075% of span with a 20:1 turndown ratio, and the measuring range spans from 3 mbar (1.2 inH2O) to 100 bar (1450 psi), available in both gauge and absolute pressure versions on the same platform.

The fully welded, robust design is available in a wide range of wetted seal materials matched to the specific corrosive or high-temperature service the PAD100 will see – 316L stainless steel, Hastelloy C276, Hastelloy C2000, super duplex UNS S32750, Inconel 625, Monel 400, tantalum, or PFA (Teflon)-coated stainless steel, with gold-plated and nano-treated (Diaflex, H-Shield) diaphragm options for the most demanding sour or abrasive media.

Engineering Design of the ABB PAD100

With HART communication and optional digital protocols, the PAD100 integrates seamlessly with DCS or PLC systems, making it well suited to modern process automation. Its modular architecture ensures easy calibration, diagnostics, and configuration, reducing downtime and maintenance costs compared to a fixed, non-modular design.

A wide selection of diaphragm seal types – including flanged, threaded, or hygienic options – gives the PAD100 the adaptability to install in tanks, pipelines, or reactors where space, cleanliness, or process integrity are critical factors, letting engineers match the seal geometry to the specific vessel or line rather than compromising the installation.

Key Features

• Remote diaphragm seal isolates sensor from aggressive, viscous, or hot media
• Fully welded construction in stainless steel or Hastelloy
• Fast response times and excellent repeatability despite remote mounting
• HART communication with optional digital protocols
• Modular architecture for easy calibration and diagnostics
• Wide selection of diaphragm seal types (flanged, threaded, hygienic)
• Suited to remote mounting where the measurement point is hard to access
• Long-term stability and low cost of ownership
• Accuracy to 0.075% of span with 20:1 turndown; range 3 mbar to 100 bar (1450 psi)
• Nine wetted seal material options, from 316L stainless steel to Hastelloy, Inconel, Monel, and tantalum
• Gauge or absolute pressure measurement on the same transmitter platform

Industrial Applications

The PAD100 is particularly suitable for chemical, oil and gas, power, and pharmaceutical industries where remote mounting is essential due to harsh media or inaccessible installation points – process taps carrying corrosive chemicals, high-viscosity fluids, or media too hot for direct sensor contact.

Across Oman’s petrochemical and power generation sectors, and throughout the wider GCC, Seven Star LLC supplies the PAD100 to facilities in Muscat, Sohar, and Salalah that require dependable, factory-genuine remote-seal pressure transmitters with full local support, correctly matched between capillary length, seal material, and fill fluid for the customer’s actual process media.

Technical Specifications

Selecting the Right Remote Seal Configuration

A remote-seal transmitter is only as good as the seal system matched to it, so most selection work happens before the transmitter itself is chosen. For the ABB PAD100, engineers should confirm four points against the process data sheet: the absolute pressure range at normal and upset conditions, the process temperature at the seal face, the chemical compatibility of the wetted diaphragm material, and the ambient temperature range the capillary will see along its route.

• Fill fluid: chosen for the process temperature and, on vacuum or near-vacuum absolute duty, for low vapour pressure so the fluid does not outgas.
• Capillary length: kept as short as the installation allows, because longer capillaries add temperature effect and slow the response.
• Seal type and connection: flanged, threaded or hygienic, matched to the existing nozzle or pipe fitting.
• Diaphragm material: selected from the wetted options listed in the specification table according to the corrosivity of the medium.

Installation and Commissioning

Mount the transmitter body at or below the seal where the layout permits, and support the capillary along its full length so it is not kinked, crushed or left swinging in the wind. Avoid routing capillary close to hot lines or across areas in strong direct sun, since uneven heating of the fill fluid shows up as zero shift. After installation, verify the zero at a known reference and confirm the range and damping through HART before handing the loop over to operations.

Maintenance and Troubleshooting

A remote-seal system is largely maintenance-free, but a slow or sluggish response, a zero that drifts with the weather, or a reading stuck at one value usually points to capillary damage, fill-fluid loss or diaphragm deformation rather than electronics fault. Inspect the diaphragm whenever the seal is removed and never press or clean it with hard tools.

Applications in Oman and the GCC

In Omani refineries, fertiliser plants and gas processing facilities, absolute pressure measurement on vacuum columns, reactor vessels and hot or crystallising lines is a typical duty for a remote-seal transmitter, and high ambient temperatures make careful capillary routing especially important. Seven Star LLC supplies the PAD100 with seal, fill fluid and capillary matched to the process data provided, and can assist with documentation for plant approval.

Request a Quote for ABB Absolute pressure transmitter with remote diaphragm seal PAD100

Contact Seven Star LLC for a quotation on the ABB PAD100 remote diaphragm seal pressure transmitter, with manufacturer documentation and local support across Oman and the GCC.

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