Introduction & Operating valves

Petroskill course

Hector Nguema Ondo Perez

Valves Overview

Purpose of valves Control rate flow Vary direction flow

CONTENTS Type of valves– Gate valves– Throttling valves– On/Off valves– Gauge glass valves

Manual/control Valves– Different between manual /control valves– Type of actuators.

Maintaining valves Operating valves

Type of valves

A gate valve stops flow by placing a metal gate across the pipe

Solid wedge gate

Parallel disc and wedge gate

Solid split gate

Gate valves

Producing a pressure drop or turbulence

Type of valves

Globe valves Butterfly valves

Throttling valves

Diaphragm valves

Plug disc

Composition disc

Conventional disc

Type of valves

Plug Valves Ball valves

ON/OFF valves

Swing Check valves Lift Check valves

Type of valvesGauge Glass valves

• Make sure the valve is completely closed by turning the handle clockwise as far as possible.

• Open the valve approximately 3/4 of a turn

• Fully open the lower and upper block valves that isolate the gauge glass system from the process fluids.

• Wait for the level of fluid in the gauge glass to stabilize. When the level in the gauge glass has stabilized, slowly open the valve as far as it will go.

• Finally, turn the valve handle one full turn clockwise.

Manual / control valves

Manual valves Easier to troubleshoot

Control valves

Different between a manual and control valves

Manual / control valvesType of actuators

Maintaining valve equipment

Use of wrenches Lubricating valves Maintaining Packing

Operating ValvesTroubleshooting

Equalizing pressure Controller troubleshooting

Valve repair

Stem Bushing Repair

Thanks for coming

Any question?