초록 ▼

A valve analysis and testing system includes various devices for measuring the operating characteristics of a valve and its operator and the corresponding imposed valve stem load, which devices are attached to the valve operator. These devices provide for statically calibrating the operator relative

A valve analysis and testing system includes various devices for measuring the operating characteristics of a valve and its operator and the corresponding imposed valve stem load, which devices are attached to the valve operator. These devices provide for statically calibrating the operator relative to the imposed valve load and provide recording traces of the imposed load and associated parameters during dynamic conditions as related to the operation of the operator and valve combined. The system provides initial dynamic traces after initial assembly, maintenance and/or periodic testing of the operator and valve. The system is then used to provide diagnostic dynamic traces at any specified time in the future for the operator and valve. These future traces are used to compare with earlier traces to verify correct performance and most importantly to detect induced or impending damage, malfunctions, or maintenance requirements for the operator and valve.

대표청구항 ▼

Method for determining and evaluating the general material and operational condition of a valve and/or an associated operator thereof said method comprising: monitoring a drive system for said operator; providing a dynamic valve operator spring pack movement/time trace; correlating valve stem load t

Method for determining and evaluating the general material and operational condition of a valve and/or an associated operator thereof said method comprising: monitoring a drive system for said operator; providing a dynamic valve operator spring pack movement/time trace; correlating valve stem load to spring pack movement to provide a valve stem load/time trace; providing a motor current/time trace; correlating the motor current/time trace with the valve stem load/time trace; providing a torque and limit switch on-off/time trace; correlating the switch on-off/time trace with the valve stem load/time trace and the motor current/time trace; and diagnosing the correlated traces to evaluate the condition of the valve and/or valve operator.