01- valves -d
DESCRIPTION
ValvesTRANSCRIPT
FTC-SWT April 20, 2023
Surface Testing
VALVES
FTC-SWT April 20, 2023
Surface Testing
VALVES
•Valves or taps are devices fitted to piping or equipment and designed to control the flow of fluids.
•ex: a 3” gate, ball or butterfly valve, means a 3” ID
FTC-SWT April 20, 2023
Surface TestingVALVESHIGH pressure
(5000 psi and above)MEDIUM
pressure (~1500 psi)
LOW pressure (~180 psi)
FlowheadChoke manifold, Sand-trapHeater & Steam-exchanger
SeparatorsOil/Gas manifoldsPumps, Burners
Tanks
1)GATE valves2)NEEDLE valves (~sampling~)
1)BALL valves2)PLUG valves
1)BUTTERFLY2)GLOBE valves
1)WOM new, (McEvoy, Malbranque, Sereg old)2)Kerotest, Autoclave
1)Mapegaz, Gachot2)Texseal, Balon
FTC-SWT April 20, 2023
Surface TestingGATE valves
•Used for shut off, (on/off function)
•High pressure (5, 10, 15, 20Kpsi)
•ex: FH, CM, Steam-exchanger, Sand-trap
•Sealing method:
-metal/metal for WOM valve
-grease sealing compound for McEvoy valve
•Standard sizes= 3 1/16” to 4 1/16”
FTC-SWT April 20, 2023
Surface Testing
WOM
GATE valves
FTC-SWT April 20, 2023
Surface TestingGATE valves
WOM
metal seals
Grease Fitting (for storage only)
GateSeal assembly with 0-ring
FTC-SWT April 20, 2023
Surface TestingGATE valves
WOM
GATE
metal/metal seal
FTC-SWT April 20, 2023
Surface TestingGATE valves
McEvoy
Surface Testing
VALVE CLOSED
Grease fittings for
Special sealing compound grease
Grease fitting for standard grease
Sealing done with the special grease
(pressure trapped)
FTC-SWT April 20, 2023
Surface TestingGATE valves
McEvoy
Surface Testing
• possibility to inject grease under pressure
• self-greasing/sealing under pressure with valve closed
seat
gates
seat
reservoir
bottom grease fitting for normal grease only
reservoir
FTC-SWT April 20, 2023
Surface Testing
•Used for shut off, (on/off) + Flow control (bleed off part of flow)
•High pressure (5, 10, 15, 20Kpsi)
•ex: instrumentation on FH, CM, Steam-exchanger, Sand-trap
•Kerotest (up to 10Kpsi)
•Autoclave Engineers (10, 15, 20K)
•Sealing method: metal/metal
(~sizes= ¼”, ½”, ¾”)
NEEDLE valves
FTC-SWT April 20, 2023
Surface TestingBALL / PLUG valves
•Used for shut off, (on/off)
•¼ turn
•Medium pressure (~1500 psi)
•ex: separator, burners, pumps, etc.
•Sealing method:
-PTFE (Teflon) seal ring or seat
Standard sizes= 1” to 4”
FTC-SWT April 20, 2023
Surface TestingBALL valve (spherical)
Mapegaz
Cross Section of a Mapegaz valve
(Spherical)
(white teflon ring)
•Sealing=
white teflon ring seal
FTC-SWT April 20, 2023
Surface TestingBALL valve (spherical)
Gachot•Medium pressure
•Sampling / bleed-off points
•Sealing= white teflon seal ring
•Standard sizes=
¼”, ½”, ¾”, 1”
FTC-SWT April 20, 2023
Surface TestingPLUG valve (cylindrical)
Texseal
•Sealing=
black teflon seat
Seats (black teflon)
Plug (cylindrical)
O-ring
stem
top hexagonal nut
FTC-SWT April 20, 2023
Surface TestingBUTTERFLY valve
Weco
•Used for shut off, (on/off)
•Low pressure
•Tanks
•Sealing= rubber seal
•Standard sizes= 1”, 2” 3”
FTC-SWT April 20, 2023
Surface TestingGLOBE valves
•Used for control of flow and shut off
•Low pressure
•Rig Water / air lines
•Sealing= metal/metal
•Standard sizes= 1”, 2” 3”
FTC-SWT April 20, 2023
Surface TestingAutomatic Control valves
•Used for flow control + throttle action
•Medium pressure
•Separator, Surge tank
•Sealing (not 100%)= metal/metal
•Standard sizes= 1”, 2”, 3”,4”
Fisher
FTC-SWT April 20, 2023
Surface TestingSwing check valves
•To allow flow in one direction only
•High/Medium/Low pressure
•Separator inlet, pump outlet
•Sealing= metal/metal
•Standard sizes= 1”, 2”, 3”,4”
Flow through valve
Flow ceases or fails below back pressure
CHECK valves
FTC-SWT April 20, 2023
Surface TestingRELIEF valves
•Spring loaded and set to open at a given pressure to protect systems from over pressure
•High/Medium/Low pressure
•Separator, flowlines, Steam-exchanger, Surge-tank
•Sealing= metal/metal
•Standard sizes= 1”, 2”, 3”,4”
Farris
FTC-SWT April 20, 2023
Surface TestingRELIEF valves
•Piloted safety relief valves
•High/Medium/Low pressure
•New Separator and Surge-tank
•Sealing= metal/metal
•Standard sizes= 3”,4”, 6”
Anderson Greewood
FTC-SWT April 20, 2023
Surface TestingSAFETY
GATE / BALL / PLUG valves:
• must not be used for throttling (i.e.: must be fully open or fully closed) because a restricted flow through it will erode the seal or gate or seat, and the valve will not seal correctly / reliably.
FTC-SWT April 20, 2023
Surface TestingSAFETY
GATE valves:
• it is common practice to count the number of turns taken to open / close a valve because the operator can tell if the valve has become plugged or is not seating correctly.
FTC-SWT April 20, 2023
Surface TestingSAFETY
GATE / GLOBE valves:
• it is best to close the gate and globe valves by ¼ turn after they are fully opened and vice-versa because over tightening the valve upon closing may damage the disk and seat. Leading to seizure or leakage.
FTC-SWT April 20, 2023
Surface TestingSAFETY
NEEDLE valves:
• when used with an instrument, the valve should only be opened enough: - to permit flow and allow the instrument to register correctly. - to allow a quick closure of the valve and to isolate the dial gauge in case of a sudden increase of pressure, above the range of the gauge.
One or two turns is usually sufficient.
FTC-SWT April 20, 2023
Surface Testing
VALVES
The END