WOM, one of the leading chokes surface equipment suppliers. All WOM products meet ISO and API Performance and these are engineered to surpass quality requirements
Casing Head Spools, Oilfield Casing Spools - WOM Groupwomgroup
WOM’s Casing Head Spools can be used in onshore and offshore environments, for general and sour service and in conventional or specialty wellhead systems.
The MS3000 Series is a Class V shutoff heavy, duty, metal seated valve that is designed for pressure up to 990 psi (69 bar) and temperatures up to 1000°F (538°C). It is ideal for condensate, steam or gas service. A wide variety of end connections are available.
WOM, one of the leading chokes surface equipment suppliers. All WOM products meet ISO and API Performance and these are engineered to surpass quality requirements
Casing Head Spools, Oilfield Casing Spools - WOM Groupwomgroup
WOM’s Casing Head Spools can be used in onshore and offshore environments, for general and sour service and in conventional or specialty wellhead systems.
The MS3000 Series is a Class V shutoff heavy, duty, metal seated valve that is designed for pressure up to 990 psi (69 bar) and temperatures up to 1000°F (538°C). It is ideal for condensate, steam or gas service. A wide variety of end connections are available.
Ceramic bearings are typically constructed with a ferrous inner and outer ring or race with ceramic balls in the place of steel. Ceramic bearings offer many advantages over all steel bearings, such as higher speed and acceleration capability, increased stiffness, lower friction and more. Ceramic balls are also nonconductive. Ceramic bearings are available in all standard industry configurations such as, angular bearings, thrust bearing, pillow block bearing, needle bearings, and roller bearings.
External Sleeve trims are used in high erosive and high pressure drop service. External Sleeve Choke is often used for control flow in severe condition instead of traditional needle adjustable choke, which is designed and manufactured.
Disc Type Choke, Disc Type Choke Valve - WOM Groupwomgroup
WOM disc type choke is a robust design that guarantees excellent controllability and protection of the sealing surfaces against erosive media. The disc type valve uses two Tungsten Carbide discs with holes of specific geometry.
WOM Group, one of the leading Adjustable Choke Valve Manufacturers offers Adjustable Chokes which are designed to provide accurate flow control throughout its operating range. Adjustable Chokes are used to control flow rate and reduce pressure for processing of produced fluids.
WOM designs, manufactures and supplies a wide range of low maintenance chokes with a choice of trims, temperature ratings and end connections to meet a variety of services. Positive Choke Equipments are manufactured to API 6A.
WOM Cementing and Circulating hose loops utilize the combination of WOM’s swivel joint flexibility and hose design for easy connection and storage for transportation.
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WOM’s Floating Ball Valves provide the user with an exceedingly reliable and proven design offering maximum sealing against leaks. WOM’s Floating Ball Valves have separate ball and stem design with a free floating ball preloaded between the seats during assembly.
WOM Group provides Floating Ball Valves with an exceedingly reliable and proven design offering maximum sealing against leaks. They have separate ball and stem design with a free floating ball preloaded between the seats during assembly.
Ceramic bearings are typically constructed with a ferrous inner and outer ring or race with ceramic balls in the place of steel. Ceramic bearings offer many advantages over all steel bearings, such as higher speed and acceleration capability, increased stiffness, lower friction and more. Ceramic balls are also nonconductive. Ceramic bearings are available in all standard industry configurations such as, angular bearings, thrust bearing, pillow block bearing, needle bearings, and roller bearings.
External Sleeve trims are used in high erosive and high pressure drop service. External Sleeve Choke is often used for control flow in severe condition instead of traditional needle adjustable choke, which is designed and manufactured.
Disc Type Choke, Disc Type Choke Valve - WOM Groupwomgroup
WOM disc type choke is a robust design that guarantees excellent controllability and protection of the sealing surfaces against erosive media. The disc type valve uses two Tungsten Carbide discs with holes of specific geometry.
WOM Group, one of the leading Adjustable Choke Valve Manufacturers offers Adjustable Chokes which are designed to provide accurate flow control throughout its operating range. Adjustable Chokes are used to control flow rate and reduce pressure for processing of produced fluids.
WOM designs, manufactures and supplies a wide range of low maintenance chokes with a choice of trims, temperature ratings and end connections to meet a variety of services. Positive Choke Equipments are manufactured to API 6A.
WOM Cementing and Circulating hose loops utilize the combination of WOM’s swivel joint flexibility and hose design for easy connection and storage for transportation.
Integral Connections, Integral Connections Oilfield Equipment - WOM Groupwomgroup
WOM Group provides Well Service Solutions including integral connections. All Integral Connections are subjected to controlled heat-treat processes to help integrity.
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Catalog for Flowserve Worcester Control industrial ball valves, pneumatic actuators and electric actuators, courtesy of Ives Equipment. Threaded, flanged, socket weld, cryogenic, Navy Approved,
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WOM’s Floating Ball Valves provide the user with an exceedingly reliable and proven design offering maximum sealing against leaks. WOM’s Floating Ball Valves have separate ball and stem design with a free floating ball preloaded between the seats during assembly.
WOM Group provides Floating Ball Valves with an exceedingly reliable and proven design offering maximum sealing against leaks. They have separate ball and stem design with a free floating ball preloaded between the seats during assembly.
Explore the various applications of snubbers, sway braces and sway struts in piping systems and equipment. Learn how these products help prevent pipe system failure due to seismic loads, flow transients, wind loads, safety valve thrust loads or pipe rupture. Discover the various tests performed within PT&P’s facility to ensure product quality, including cycle testing, travel testing and load testing.
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WOM offering of Casing Head designs guarantee that our equipment is compatible with any industry-standard system. Casing Heads are compatible with WC-21, WC-22 and WC-29 casing hangers and Mandrel casing hangers.
WOM Tubing Hangers allow for nippling up/down the Christmas tree without blowout preventer (BOP) protection. WOM Tubing Hangers feature an annulus compression elastomer seal pack off or an optional annulus metal-to-metal seal energized by a compression ring.
WOM’s Patented Dual Seal Ball Valve is the only trunnion mounted ball valve with two independent seats on both sides of the ball. The Primary Seat take the normal wear and tear when the valve is cycled. If it ever gets damaged the Secondary Seat takes over.
WOM Group, one of the leading Adjustable Chokes Manufacturers. Adjustable Chokes comes up with a standard choke body with an adjustable choke bonnet assembly and Seat. Read more about Adjustable Chokes.
Plug and Cage Choke, Plug and Cage Control Choke - WOM Groupwomgroup
WOM's control chokes are available with a plug & cage or an external sleeve trim. Plug and Cage chokes are designed to provide accurate flow control throughout its operating range.
WOM's Plug Valve is a tapered seal, lubricated, quarter-turn plug valve for rapid operation in both onshore and offshore applications designed to control the movement of fluid through the flow line.
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Sustainability has become an increasingly critical topic as the world recognizes the need to protect our planet and its resources for future generations. Sustainability means meeting our current needs without compromising the ability of future generations to meet theirs. It involves long-term planning and consideration of the consequences of our actions. The goal is to create strategies that ensure the long-term viability of People, Planet, and Profit.
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1. Introduction and Key Concepts of Sustainability
2. Principles and Practices of Sustainability
3. Measures and Reporting in Sustainability
4. Sustainability Implementation & Best Practices
To download the complete presentation, visit: https://www.oeconsulting.com.sg/training-presentations
3. Choke Intro.......................................................................................................................................................4
Positive and Adjustable Choke
Positive Chokes............................................................................................................................................5
Adjustable Chokes.......................................................................................................................................6
Features and Benefits..................................................................................................................................7
Pressure Balanced Adjustable Choke
Model WPB-30 & -40....................................................................................................................................8
Comparison..................................................................................................................................................9
WFB, WOM Flowback Chokes.........................................................................................................................10
Plug and Cage Choke - WPC Series..............................................................................................................11
Product Specification & Features..............................................................................................................11
Applications..................................................................................................................................................11
External Sleeve Choke - WES Series...............................................................................................................13
Product Specification & Features..............................................................................................................13
Applications..................................................................................................................................................13
Model WES(H2)-20 & -30..................................................................................................................................15
Special Multistage Trim....................................................................................................................................17
Control Flow .....................................................................................................................................................18
Characteristics.............................................................................................................................................18
Drilling Chokes..................................................................................................................................................19
Magnum Choke Valve ...............................................................................................................................20
Additional Features
Pressure Balancing Hole..............................................................................................................................21
Micrometer Indicator..................................................................................................................................21
Thumb Screw................................................................................................................................................21
Stem Packing & Lip Seals............................................................................................................................21
Standard Material of Construction..................................................................................................................22
4. 4
Chokes
Utilizing a Worldwide Manufacturing and Engineering presence, WOM Chokes offer affordable
and long term solutions for various choke applications.
WOM Chokes are engineered and
manufactured in compliance with the
standards:
• API 6A / ISO 10423
• PR1 AND PR2
• ANSI B16.5
• NACE Mr0175
• ISO 9001/2008
• EN 10204
• API 16C
Applications and Industries served
• Production
• Flowback
• Water Injection
• Gas Injection and Gas Lift
• Chemical Injection
• Fracturing Clean Up
• High Pressure Drop Application
• Multi-Phase Flow Applicaction
• Cementing
• Drilling Manifolds
• Gas Processing
Adjustable Choke
5. 5
Worldwide Oilfield Machine
Positive Choke
WOM Positive Choke
The simplest configuration of the choke, which has a blanking plug assembly and flow bean
in a standard choke body provides fixed flow conditions with respect to the various size of
choke flow beans. Choke flow beans have tapered entrance to provide a smooth flow with
minimized turbulence and beans retain their accuracy for a longer period of time. Sizes of
choke flow beans of both integral and fractional 64th are available.
Product Specification & Features
• Wing nut style bonnet enables quick tear down of bonnet assembly.
• Interchangeable components which gives maximum flexibility of choice by utilizing one
body and changing beans, seats and top-work (bonnet) assembly to convert positive
chokes to adjustable chokes and vice versa.
• Meet or exceed the minimum requirement specified by API 6A latest Edition
Applciations
Used in X-mas trees, production applications, choke and kill manifold, well testing and clean
up operations.
6. 6
Chokes
Needle and Seat is one of the simplest design of adjustable chokes available. It has a standard
choke body with an adjustable choke bonnet assembly and Seat. The major parts of the assembly
are conical tip rising needle, stainless steel seat and an indicator calibrated in 1/64” increments
to enable effective orifice diameters. In highly erosive service a tungsten carbide tipped needle
and tungsten carbide lined seat can be supplied.
Needle and seat design is suitable for standard erosive and corrosive services, and less severe
service (non-high vibration applications i.e. high gas rates, high solids, etc.) that do not require
tight shutoff.
Product Specification & Features
• Wing nut style bonnet enables quick tear down of bonnet assembly.
• Interchangeable components provides a maximum flexibility of choice.
• Meet or exceed the minimum requirement specified by API 6A latest Edition
Applications
Used in X-mas trees, production applications, choke and kill manifold, well testing and clean-up
operations.
WOM Adjustable Choke
Adjustable Choke
7. 7
Worldwide Oilfield Machine
2’’ Nominal Body (1’’Max orifice)
Size / Pressure 2 K 3K 5K 10K 15K 20K
2 1/16” x x x x x
2 9/16” x x x x
Features and Benefits
• Interchangeable components provide a maximum flexibility of choice.
• Available in both manual and automated operation.
• Meet or exceed API 6A requirements.
Available Sizes and Pressure Ratings
Adjustable and Positive Choke Sizes
3’’ Nominal Body (2’’ Max orifice)
Size / Pressure 2 K 3K 5K 10K 15K 20K
2 9/16” x x x x
3 1/8” x x
3 1/16’’ x x x
4 1/16’’ x x x
4’’ Nominal Body (3’’ Max orifice)
Size / Pressure 2 K 3K 5K 10K 15K 20K
4 1/16” x x x x
5 1/18” x x
Specifications
Nominal Size 2’’ to 4’’
Working Pressure Up to 20,000 PSI *May vary according to size
Temperature: -20 °F to 350 °F
PSL: 1-3
Material Class BB to HH
PR-2
8. 8
Chokes
Model
Available
Orifice
Available Orifice
(in fractions)
Working Pressure Flange Size
WPB-30 2” 128/64” API 10000 to 15000 psi API 2-1/16” to 4-1/16”
WPB-40 3” 192/64” API 5000 to 10000 psi API 3-1/16” to 5-1/8”
Pressure Balanced Adjustable Chokes
Model WPB-30 & -40
These are the improved version of standard needle & seat type chokes, where the operating
torque is significantly reduced by balancing the pressure across the gate.
• Lower torque eliminates the requirement of gear box thus considerably reducing the
number of turns to operate the choke.
• Elimination of gear box makes field maintenance easy. It also eliminates the possibility of
over-torqueing the stem, thus prevents the possible damage to the trim components.
• The indicator is designed to show the exact bean size in the window.
• Available in high pressure with larger trims i.e. 2” and 3” orifice.
WPB-30 WPB-40
Available Sizes and Pressure Ratings
9. 9
Worldwide Oilfield Machine
• W/O Gear Box
• No. of turns : 14
• Total Height : 36”
• Est. Weight : 585 lbs
MODEL WPB-40
Std. Adjustable Choke
• Comes with Gear Box
• No. of turns : 132
• Total Height : 51”
• Est. Weight : 700 lbs
Pressure Balanced Adjustable Chokes
Comparison
10. 10
Chokes
WFB, WOM Flowback Chokes
The WOM Flowback choke, Model WFB is designed with Hammer Union connections and is well
suited for fracking, flow back, and well service applications.
Available in both a 2” body with a 1” maximum orifice and a 3” nominal body with a maximum
orifice size of 2”.
Adjustable Choke Specifications
End Type
Model : WFB-20 2’’ 1502F x 2’’ 1502M
Model : WFB-20 2’’ 1502F x 2’’ 1502M
Model : WFB-20 2’’ 1502M x 2’’ 1502F
Model : WFB-20 2’’ 1502F x 2’’ 1502F
Model : WFB-20 2’’ 1502F x 2’’ 1502M
Model : WFB-20 2’’ 1502M x 2’’ 1502M
Model : WFB-20 2’’ 1502M x 2’’ 1502F
Model : WFB-30 3’’ 1502F x 3’’ 1502M
Model : WFB-30 3’’ 1502F x 3’’ 1502M
Style
0.75 Seat
0.75 Seat
0.75 Seat
0.75 Seat
1.00 Seat
1.00 Seat
1.00 Seat
2.00 Seat
2.00 Seat
Hammer Union
Hammer Union
Hammer Union
Hammer Union
Hammer Union
Hammer Union
Hammer Union
Hammer Union
Hammer Union
Low
Low
Low
Low
Low
Low
Low
Low
Low
Connection Type Service
Type
Std.
H2S
Std.
Std.
H2S
Std.
Std.
Std.
H2S
Dim. A
{in / mm}
9.91 / 251.7
9.91 / 251.7
9.91 / 251.7
9.91 / 251.7
9.91 / 251.7
9.91 / 251.7
9.91 / 251.7
11.88 / 301.8
11.88 / 301.8
Dim. B
{in / mm}
6.06 / 153.9
6.06 / 153.9
6.06 / 153.9
6.06 / 153.9
6.06 / 153.9
6.06 / 153.9
6.06 / 153.9
8.38 / 212.9
8.38 / 212.9
Temp
11. 11
Worldwide Oilfield Machine
Plug & Cage Trim
Primary Wear
Secondary Wear
Plug moves up/down to
vary hole opening area
Plug and Cage Choke - WPC Series
Plug and cage chokes are designed to provide accurate flow control throughout its operating
range. The internal internally guided plug controls the opening and rate of flow. It is a robust
design with its maximum flow capacity, making it ideal for oil production water injection and
chemical injection services.
Product Specification & Features
• The WOM Plug and Cage style choke features a tungsten carbide cage as the throttling
mechanism with a protective steel carrier around it.
• Outer Steel carrier is for protection against impacts from debris in the production fluid.
• The trim characteristics is equal percentage that provides superior flow control, however,
WOM can provide the linear trim as well on demand.
• Pressure balanced trim considerably reduces the torque required to operate the choke.
• Plug is fully guided at the ID of sleeve and is rigidly attached to the stem to resist any
induced vibration damage.
• Meet or exceed the minimum requirement specified by API 6A latest Edition
Applications
Plug and cage chokes are used for high capacity/Medium pressure drop application, Used in
X-mas tree, process platforms, FPSOs.
12. 12
Chokes
Available Sizes and Pressure Ratings
Plug and Cage Choke - WPC Series
NOMINAL SIZE
2’’
3’’
4’’
6’’
AVAILABLE
TRIMS SIZES
0.50’’
0.75’’
1.0’’
0.50’’
0.75’’
1.0’’
1.5’’
2.0’’
1.0’’
1.5’’
2.0’’
2.5’’
3.0’’
3.0’’
4.0’’
5.0’’
6.0’’
AVAILABLE TRIMS SIZE
S FRACTIONS
32/64
48/64
64/64
32/64
48/64
64/64
96/64
128/64
64/64
96/64
128/64
160/64
192/64
192/64
256/64
320/64
384/64
WORKING PRESSURE
API 5000 to 10000 PSI
API 15000 to 20000 PSI
ANSI 900# to 2500#
API 5000 to 10000 PSI
API 15000 to 20000 PSI
ANSI 900# to 2500#
API 5000 to 10000 PSI
ANSI 900# to 2500#
API 5000
ANSI 900# to 1500#
FLANGE SIZE
API 1-13/16” to 3-1/16”
API 1-13/16” to 2-1/16”
ANSI 2” to 3”
API 2-9/16” to 5-1/8”
API 2-9/16” to 3-1/16”
ANSI 2” to 4”
API 3-1/16” to 5-1/8”
ANSI 3” to 5”
4-1/16 to 7-1/16”
ANSI 4” to 8”
CHOKE MODEL
WPC20
WPC30
WPC40
WPC60
13. 13
Worldwide Oilfield Machine
External Sleeve Choke
Primary Wear
Secondary Wear
External Sleeve moves up/down
to vary hole opening area
External Sleeve Choke - WES Series
External Sleeve chokes are designed to provide accurate flow control throughout its operat-
ing range. The externally guided sleeve controls the opening and rate of flow. The flow is di-
rected upward away from the outlet, impinges on itself in the center of the flow cage which
in turn isolates the body bore from incoming turbulent flow hence eliminating the body wear,
making it ideal for low capacity/high pressure drop applications.
Product Specification & Features
• The seating is achieved through an isolated sealing element contact on a seat outside
the flow cage.
• Pressure balanced trim considerably reduces the torque required to operate the choke.
• The trim characteristics is equal percentage that provides superior flow control, however,
WOM can provide the linear trim as well on demand.
• Keeping the seat surface away from the high velocity flow protects the seat from throt-
tling wear and the seat integrity is maintained.
• Meet or exceed the minimum requirement specified by API 6A latest Edition
Applications
External sleeve chokes are used in X-mas trees, gas lift applications, choke manifolds, well
test applications, process platforms and FPSOs.
14. 14
Chokes
Available Sizes and Pressure Ratings
CHOKE MODEL
WES20
WES30
WES40
WES60
NOMINAL SIZE
2’’
3’’
4’’
6’’
AVAILABLE
TRIMS SIZES
0.50’’
0.75’’
1.0’’
0.50’’
0.75’’
1.0’’
1.5’’
2.0’’
1.0’’
1.5’’
2.0’’
2.5’’
3.0’’
3.0’’
4.0’’
5.0’’
6.0’’
AVAILABLE TRIMS
SIZE FRACTIONS
32/64
48/64
64/64
32/64
48/64
64/64
96/64
128/64
64/64
96/64
128/64
160/64
192/64
192/64
256/64
320/64
384/64
WORKING PRESSURE
API 5000 to 10000 PSI
API 15000 to 20000 PSI
ANSI 900# to 2500#
API 5000 to 10000 PSI
API 15000 to 20000 PSI
ANSI 900# to 2500#
API 5000 to 10000 PSI
ANSI 900# to 2500#
API 5000
ANSI 900# to 1500#
FLANGE SIZE
API 1-13/16” to 3-1/16”
API 1-13/16” to 2-1/16”
ANSI 2” to 3”
API 2-9/16” to 5-1/8”
API 2-9/16” to 3-1/16”
ANSI 2” to 4”
API 3-1/16” to 5-1/8”
ANSI 3” to 5”
4-1/16 to 7-1/16”
ANSI 4” to 8”
External Sleeve Choke - WES Series
15. 15
Worldwide Oilfield Machine
Model WES(H2)-20 & -30
WES(H2) series is an innovative modular design interconvertible between external sleeve,
needle & seat and fixed bean choke design. It can also be easily converted from manual to
actuator operated and vice-versa.
Model WES(H2) can be converted to needle and seat choke by replacing the stem and
seat.
For WES(H2) chokes, conversion from a manual to an actuated choke does not require the
choke to be dis-assembled thereby decreasing downtime.
WES(H2)-20
Manual & Actuated
16. 16
Chokes
Model
Available
Orifice
Available Orifice
(in fractions)
Working Pressure Flange Size
WES(H2)-20
.75” 48/64”
API 2000 to 15000 PSI API 1-13/16” to 3-1/8”
1” 64/64”
WES(H2)-30 2” 128/64” API 2000 to 10000 PSI API 3-1/16” to 5-1/8”
Model WES(H2)-20 & -30
Adjustable Choke
(Needle & Seat type)
Positive Choke
Available Sizes and Pressure Ratings
17. 17
Worldwide Oilfield Machine
Special Multistage Trim
Special energy dissipating, velocity controlled, disc stack trim can be provided as a solution
to severe service applications. Including anti cavitation, high pressure drop, and low noise
services.
In the Special Multistage trim, the resistance,
number and area of the individual flow passages are
custom matched to the specific application, and
exit velocities are managed to eliminate cavitation
and erosion in liquid service and vibration and noise in
gas service.
18. 18
Chokes
Trim Characteristics
Choke flow control falls into three broad trim
characteristics:
• Quick Opening
• Linear
• Equal percentage: Percentage of choke
opening is equal to the percentage of
change in the flow capacity. It is an
exponential curve that has better flow
controllability at low opening positions.
Control Flow
19. 19
Worldwide Oilfield Machine
Drilling Chokes
WOM Manual Drilling Choke WOM Hydraulic Drilling Choke
WOM drilling chokes offer the customer increased service life and cost savings in high
pressure drilling operations especially where substantial amount of
abrasive fluids are present. WOM Drilling chokes are designed to encounter large cuttings
coming up with the drilling mud.
Product Specification & Features
• Features cutting edge gate and seat design which reduces wear in extremely hostile
flow conditions
• Reversible gate and seat design increases life of the choke.
• Pressure balanced trim considerably reduces the torque required to operate the choke.
• Large body cavity around trim components reduces the speed of the solids in the fluids,
thus enhances the body life.
• Extended wear sleeve limits downstream erosion to the trim, protecting the body from
damage.
• Meet or exceed the minimum requirement specified by API 16C latest Edition
Applications
Their consistent performance has been proved in kick control, well testing, well clean-up
and other harshest of conditions. Available in 1-3/4” orifice trim with 5,000, 10,000 and 15,000
PSI pressure ratings.
20. 20
Chokes
Magnum Choke
Hydraulic motor driven manual override Linear Electric actuator driven (servo)
Available Sizes and Pressure Ratings
Magnum Choke
API Preassure Range (Psi)
5000-20000
5000-15000
5000-15000
Max.orifice Size
1.5’’ or 2’’
1.5’’ or 2’’ or 3’’
3’’
Nominal Size
2’’
3’’
4’’ to 7’’
Magnum chokes offer the customer increased service life and cost savings in high pressure
applications, extreme service conditions where the substantial amount of abrasives and debris
are present. I extreme services/operations the magnum choke’s robust design minimizes the
operational downtime and equipment damages.
Product Specification & Features
• The magnum choke body can accommodate 3”, 2” or 1.5” orifice with respect to change in
process parameters. All sizes of trims are interchangeable within the same choke body.
• Optional manipulator system allows the operator to slide and swing the bonnet assembly for
quick tear down for trim changes.
• Designed to provide tight shut off.
• Pressure balanced trim considerably reduces the torque required to operate the choke.
• Large body cavity around trim components reduces the velocity of the solids in the fluids, thus
enhances the body life.
• Extended wear sleeve limits downstream erosion to the trim, protecting the body from damage.
• Gate is fully guided by the Bonnet Extension which can be rotated with respect to bonnet to
shift the surface wear
• Meets or exceeds the requirement specified by API6A and API 16C.
Applications
Used for extreme applications like flow back, drilling, choke & kill, coil tubing, well control &
snubbing.
21. 21
Worldwide Oilfield Machine
Thumb Screw
Thumb Screw maintains set position of the
Stem by resisting rotation of the drive nut.
Pressure Balancing Hole
Pressure balance hole is provided in all WOM choke valves
so as to equalise the pressure around the Stem Seal which
reduces the stem load & in turn the torque required to
operate the valve.
Micrometer Indicator
Linear allowance in the Micrometer Indicator
marking for easy calibration of the Indicator
after assembly.
Large visual Dial Indicator for easy operation.
Stem Travel, % Open and Bean Size are shown
on the Indicator Marking for easy & correct
positioning of the valve.
Stem Packing & LIP Seals
Spring energized lip seals with scrapers used for
dynamicsealsenhancereliabilityofstempacking
and pressure balance sealing.
Additional Features
22. 22
Chokes
API 6A Material Class and Material
Item AA, BB EE - 1.5 EE CC, FF 1.5 FF HH
Body Bonnet AISI 4130 AISI 4130 AISI 4130
AISI 410 SS or
Grarde F6NM SS
AISI 410 SS or
Grarde F6NM SS
AISI 4130 w/ Alloy
625 Cladding
Stem AISI 410 SS AISI 410 SS
INC 718 or
INC 725
AISI 410 SS or INC
718
INC 718 or
INC 725
NC 718 or
INC 725
Bolting ASTM A320 L7 ASTM A320 L7 ASTM A320 L7 ASTM A320 L7 ASTM A320 L7 ASTM A320 L7
Seat, Cage,
External Sleeve,
Plug
AISI 410 SS and
Tungsten Carbide
AISI 410 SS and
Tungsten Carbide
AISI 410 SS and
Tungsten Carbide
AISI 410 SS and
Tungsten Carbide
AISI 410 SS and
Tungsten Carbide
CRA 718 / 725 / 625
and Tungsten
Carbide
Stem Packing PTFE / Elastomeric PTFE / Elastomeric PTFE / Elastomeric PTFE / Elastomeric PTFE/ Elastomeric PTFE/ Elastomeric
Notes:
1 - H2S concentration as defined by ISO 15156 (NACE MRO175)
2 - H2S no limit as decined by ISO 15156 (NACE MRO175)
3 - Material selection subject to change and review
Standard Materials of Construction
API
Classification
Operating Temperature
Min (C) Max (C) Max (F) Min (F)
L -46 82 -50 180
N -46 60 -50 140
P -29 82 -20 180
S -18 60 0 140
T -18 82 0 180
U -18 121 0 250
X -18 180 0 350