FAQs

Q

What kind of service does the Valve Diagnostics Service offer?

A

The Valve Diagnostics Service provides assistance by diagnosing the deterioration of control valves using various calculation parameters sensed by Azbil Smart Valve Positioners attached to valves used at a wide range of manufacturing facilities (chemical plants, steel plants, etc.), power plants, and other kinds of facilities.
The service provides early detection of valve abnormalities that could previously be found only in overhaul inspections, and it predicts abnormalities various parts of the valve. This helps prevent sudden problems and equipment shutdowns caused by control valve malfunction.

Diagnosis Overview

Q

How is valve deterioration diagnosed?

A

We make diagnoses based on analysis of the enormous volume of data collected and accumulated on a 24-7-365 basis by the control valve maintenance support system PLUG-IN Valstaff, as well as the wealth of expertise and experience we have cultivated throughout our eight decades as a control valve manufacturer. Various valve operation parameters are sensed and calculated in tens of milliseconds inside Azbil Smart Valve Positioners that are attached to control valves.

Diagnostic Tools

Q

What kinds of deterioration can you find?

A

We find hunting, sticking, galling, damaged trim, clogged trim, problems with closing performance against fluid differential pressure, insufficient supply air pressure, and problems with the positioners’ air circuits.

Q

What kind of deliverables can I expect from the Valve Diagnostics Service?

A

We present you with reports that rate the controllability of diagnosed valves and deterioration in four valve areas, with an evaluation of each as Good, Follow up, Check thoroughly, or Maintenance required. We also provide consultation and advice regarding diagnoses upon request.

Types of diagnosis

Q

Can non-Azbil valves be diagnosed?

A

Yes.
Note: This requires attaching Azbil’s Smart Valve Positioners to the valves.

Q

Is there any difference in diagnosis accuracy between Azbil valves and non-Azbil valves?

A

Generally no.
Note: In the case of manufacturer-specific special valves, there might be some difference.

Q

Our valves are connected to a non-Azbil DCS. Can we use the diagnosis service?

A

In some cases. In the case of FOUNDATION Fieldbus (FF communication), our service only supports Yokogawa DCS CENTUM.
Note: Installation of the control valve maintenance support system PLUG-IN Valstaff　is a prerequisite.

Q

What valve types can you assess?

A

Globe, double-seated, cage, diaphragm, eccentric rotary, butterfly, and ball.

Diagnosis Overview

Q

What contract types are available for the Valve Diagnostics Service?

A

There are two types: annual contract and spot contract (only when a diagnosis is needed).

Q

Is there any limit on the number of valves that receive the service?

A

No.