Mechanical Pressure Gauges 101 Lesman(101 Lesman机械压力表).pdfVIP

Mechanical Pressure Gauges 101 Lesman(101 Lesman机械压力表).pdf

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Mechanical Pressure Gauges 101 Lesman(101 Lesman机械压力表)

Mechanical Pressure Gauges 101 1 Today’s Agenda 2 Importance of Mechanical Gauges Why Maintain Them? 3 Importance of Mechanical Gauges Why Maintain Them? • Provide a local pressure indication • Detect signs of degradation in process performance not otherwise tracked through DCS equipment • Identify potential loss of process or loss of containment • Predict how long a piece of equipment can be safely and economically run • Diagnose causes of system and production disruptions Pressure Gauges: Sole Source of Data  Discharge pressure  Suction pressure  Differential pressure  Mechanical seal flush pressure  Steam quench pressure 5 Pressure Gauges: Calculating Risks Pumps rank 1st in failure incidents and maintenance costs. And, repairs account for27% of life cycle costs. Source: Pump User’s Handbook 6 The Pressure Gauge: Current State At least 25% of pressure gauges require immediate replacement. And, and additional 40% need corrective action. 7 Gauge Design Basic Principles Gauge Design Review 8 Gauge Design Basic Principles Types of Gauges Bourdon Tube Process Gauge with Direct Drive Process Gauge

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