Diagnosis Overview

About our Valve Diagnostics Service

Introduction video

Our Valve Diagnostics Service analyzes and diagnoses information collected through the control valve maintenance support system PLUG-IN Valstaff to discover and predict valve abnormalities that could previously be found only through overhaul inspections. This helps you to prevent facility shutdowns caused by control valves, allows you to focus on the actual work of maintenance, and helps you to streamline work the smart way.

Delivery of Valve Diagnostics Service diagnoses

Value of diagnosis service

Valve health visualization

Valve diagnostic summary (with radar chart)

The valve diagnostic report gives a quick overview of valve health

Smart Valve Positioner

Quantification of
valve motion

Valstaff

Visualization of
motion

Visualization of
operation

Smart Valve Positioner diagnostic parameter information

Service details

Applicable valves

7 supported valve types: globe, double seated, cage, diaphragm, eccentric rotary, butterfly, and ball.

* 200/300 series：Models AVP202/207/302/307
700 series：Models AVP701/702/703

Diagnosable conditions

The following phenomena can be detected by analyzing various combinations of operating data.

Phenomenon	Azbil’s Smart Valve Positioners (with HART/FOUNDATION Fieldbus support)
Phenomenon	Models AVP202/207/302/307	Models AVP701/702/703
Sticking	○	○
Galling	○	○
Damaged trim, clogging	○	○
Hunting after input of certain values to the positioner	○	○
Slowdown (underperformance before sticking/galling)	ー	○
Inadequate performance for fluid differential pressure	ー	○
Insufficient supply air pressure	ー	○
Positioner air circuit problems	ー	○

Types of diagnosis

Three types of diagnostic service meet different needs at production sites.

Primary screening
diagnosis

This identifies which valves among hundreds at the plant require close monitoring, and tells their condition.

Learn more

Detailed
diagnosis

Detailed analysis of customer-specified valves and valves assessed by primary screening as needing attention, in order to gain in-depth understanding of problem conditions.

Comparative
verification

Even valves with completely identical specifications have different characteristics depending on the fluid used and the operating conditions. These characteristics can be understood by repeated comparative verification.

Tools required for diagnosis

The Valve Diagnostics Service collects and accumulates various diagnostic parameters held by Azbil’s HART^® communication–compatible Smart Valve Positioner diagnostic devices in the control valve maintenance support system PLUG-IN Valstaff, and uses this valve operating data to make diagnoses.