Adjustable Choke Valve

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Choke valve, sometimes also known as 'choker valve' is a type of control valve, mostly used in oil and gas production wells to control the flow of well fluids being produced. Another purpose that the choke valves serve is to kill the pressure from reservoir and to regulate the downstream pressure in the flowlines. Choke valves allow fluid flow through a very small opening, designed to kill the reservoir pressure while regulating the well production. The reservoir fluids can contain sand particles. Hence the choke valves are usually designed to handle an erosive service. Typically oil and gas producing wells have two choke valves in series, one non-regulating choke valve and one regulating choke valve downstream to the non-regulating choke valve.

Non-regulating choke valves

Function of the non-regulating choke valve is to act as an on-off valve and kill the reservoir pressure to a desired operating value in the flowline. The opening in the choke valve is sized to kill the pressure when valve is fully open. The non-regulating choke valve is not used for flow regulation and hence is not sized for controlling the flow. Over the life of an oil production well, the reservoir pressure drop as fluids are depleted from the reservoirs. Hence with dropping reservoir pressure, the non-regulating valves may have to be changed to maintain the same well production levels. Hence over the life of an oil production well, the non-regulating choke valves can be replaced with valves having increasingly larger openings for flow.

Regulating choke valves

The regulating choker valve is a flow control valve which is designed to maintain a steady production level in the flowlines and production header. Regulating choke valve is an automatic valve and valve opening can be controlled via electric or pneumatic signal from the control panel to regulate the flow in downstream flowlines. Among other applications, choker valve can be used in liquid lines operating at very high pressures.

Choke Valve Construction

Position Description

10 Body

12 Hex. Head BleedPlug

13 Upper Bonnet

14 Drive CoverPlate

(15) Pressure Balance Seal

(16) Seal Ring

17 ● Seat Flow Cage

(18) O-Ring

20 ● Control Plug

35 ● Disc Retaining Screw

40 ● Seat Bushing

(50) Seal Ring

55 ● Pressure Balance Sleeve

(60) Packing Ring

Position	Description
10	Body
12	Hex. Head BleedPlug
13	Upper Bonnet
14	Drive CoverPlate
(15)	Pressure Balance Seal
(16)	Seal Ring
17 ●	Seat Flow Cage
(18)	O-Ring
20 ●	Control Plug
35 ●	Disc Retaining Screw
40 ●	Seat Bushing
(50)	Seal Ring
55 ●	Pressure Balance Sleeve
(60)	Packing Ring

Position Description

(65) Packing Set

(68) Junk Ring

(72) Spiral Wound Gasket

(73) Crush Gasket

(74) O-Ring
80 ● Mid-Bonnet

90 Hexagon SHC Screw

95 ● Cup Springs

112 Grease Fitting

115 Anti-Rotation Device

116 Parallel Key
120 ● Lower Spindle

121 ● Upper Spindle

125 Cylinder Pin

140 Stud

Position	Description
(65)	Packing Set
(68)	Junk Ring
(72)	Spiral Wound Gasket
(73)	Crush Gasket
(74)	O-Ring
80 ●	Mid-Bonnet
90	Hexagon SHC Screw
95 ●	Cup Springs
112	Grease Fitting
115	Anti-Rotation Device
116	Parallel Key
120 ●	Lower Spindle
121 ●	Upper Spindle
125	Cylinder Pin
140	Stud

Position Description

160 Heavy Hex Nut

180 Stud

185 Heavy Hex Nut

190 Drive Bushing

195 Position Lock Screw

210 ● Cylindrical Bearing Set

(220) O-Ring

(230) O-Ring

235 MicrometerIndicator

240 Hexagon SHC Screw

250 Parallel Key

260 Handwheel

274 Hexagon SHC Screw

277 Position indicator Plate

Position	Description
160	Heavy Hex Nut
180	Stud
185	Heavy Hex Nut
190	Drive Bushing
195	Position Lock Screw
210 ●	Cylindrical Bearing Set
(220)	O-Ring
(230)	O-Ring
235	MicrometerIndicator
240	Hexagon SHC Screw
250	Parallel Key
260	Handwheel
274	Hexagon SHC Screw
277	Position indicator Plate

*NOTE

( ) Indicates recommended spare parts for start-up & 2 year service replacement

●Indicates capitol spare components

ASME Angle Choke Valve Dimensions

Trim Model (A x B) „A“ (mm)³ „B“ (mm)³ „C“ (mm) „CMO“(mm)⁴ Weight (Kg)⁵ Max. Cv⁶

¹⁄₈
(3) 2“ x2“-600# 9,88(251) 7,77 (197) 14,76(375) 22,24(565) 55 (25) 0,3

3“ x3“-600# 9,66 (245) 7,72(196) 17,13(435) 25,59(650) 110 (50)

2“ x2“-900# 10,41(264) 8,22 (209) 17,90(455) 26,97(685) 120 (55)

3“ x3“-900# 8,47 (215) 130 (60)

2“ x2“-1500# 9,88(251) 7,77 (197) 25,00(635) 31,30(795) 120 (55)

3“ x3“-1500# 11,00 (280) 9,06(230) 25,59(650) 32,09(815) 165 (75)

2“ x2“-2500# 11,44 (291) 31,50(660) 32,48(825)

3“ x3“-2500# 13,00 (330) 11,06(281) 27,56(700) 41,34(1050) 220 (100)

¹⁄₄
(6) 2“ x2“-600# 9,88(251) 7,77 (197) 14,76(375) 22,24(565) 55 (25) 1,5

3“ x3“-600# 9,66 (245) 7,72(196) 17,13(435) 25,59(650) 110 (50)

4“ x4“-600# 17,32(439) 9,16(232) 32,68 (830) 40,94 (1040) 200 (90)

2“ x2“-900# 10,41(264) 8,22 (209) 17,90(455) 26,97(685) 120 (55)

3“ x3“-900# 8,47 (215) 130 (60)

4“ x4“-900# 17,82 (452) 9,66(245) 33,07 (840) 41,34 (1050) 220 (100)

2“ x2“-1500# 9,88(251) 7,77 (197) 25,00(635) 31,30(795) 120 (55)

3“ x3“-1500# 11,00 (280) 9,06(230) 25,59(650) 32,09(815) 165 (75)

4“ x4“-1500# 18,17 (460) 10,01(254) 33,46 (850) 41,93 (1065) 265 (120)

2“ x2“-2500# 11,44 (291) 9,25(230) 31,50(660) 32,48(825) 165 (75)

3“ x3“-2500# 13,00 (330) 11,06(281) 27,56(700) 41,34(1050) 220 (100)

4“ x4“-2500# 20,76(526) 12,63(320) 36,02 (915) 45,28 (1150) 440 (200)

¹⁄₂
(12) 2“ x2“-600# 9,88(251) 7,77 (197) 14,76(375) 22,24(565) 55 (25) 5,5

3“ x3“-600# 9,66 (245) 7,72(196) 17,13(435) 25,59(650) 110 (50)

Trim	Model (A x B)	„A“ (mm)³	„B“ (mm)³	„C“ (mm)	„CMO“(mm)⁴	Weight (Kg)⁵	Max. Cv⁶
¹⁄₈ (3)	2“ x2“-600#	9,88(251)	7,77 (197)	14,76(375)	22,24(565)	55 (25)	0,3
3“ x3“-600#	9,66 (245)	7,72(196)	17,13(435)	25,59(650)	110 (50)
2“ x2“-900#	10,41(264)	8,22 (209)	17,90(455)	26,97(685)	120 (55)
3“ x3“-900#	8,47 (215)	130 (60)
2“ x2“-1500#	9,88(251)	7,77 (197)	25,00(635)	31,30(795)	120 (55)
3“ x3“-1500#	11,00 (280)	9,06(230)	25,59(650)	32,09(815)	165 (75)
2“ x2“-2500#	11,44 (291)	31,50(660)	32,48(825)
3“ x3“-2500#	13,00 (330)	11,06(281)	27,56(700)	41,34(1050)	220 (100)
¹⁄₄ (6)	2“ x2“-600#	9,88(251)	7,77 (197)	14,76(375)	22,24(565)	55 (25)	1,5
3“ x3“-600#	9,66 (245)	7,72(196)	17,13(435)	25,59(650)	110 (50)
4“ x4“-600#	17,32(439)	9,16(232)	32,68 (830)	40,94 (1040)	200 (90)
2“ x2“-900#	10,41(264)	8,22 (209)	17,90(455)	26,97(685)	120 (55)
3“ x3“-900#	8,47 (215)	130 (60)
4“ x4“-900#	17,82 (452)	9,66(245)	33,07 (840)	41,34 (1050)	220 (100)
2“ x2“-1500#	9,88(251)	7,77 (197)	25,00(635)	31,30(795)	120 (55)
3“ x3“-1500#	11,00 (280)	9,06(230)	25,59(650)	32,09(815)	165 (75)
4“ x4“-1500#	18,17 (460)	10,01(254)	33,46 (850)	41,93 (1065)	265 (120)
2“ x2“-2500#	11,44 (291)	9,25(230)	31,50(660)	32,48(825)	165 (75)
3“ x3“-2500#	13,00 (330)	11,06(281)	27,56(700)	41,34(1050)	220 (100)
4“ x4“-2500#	20,76(526)	12,63(320)	36,02 (915)	45,28 (1150)	440 (200)
¹⁄₂ (12)	2“ x2“-600#	9,88(251)	7,77 (197)	14,76(375)	22,24(565)	55 (25)	5,5
3“ x3“-600#	9,66 (245)	7,72(196)	17,13(435)	25,59(650)	110 (50)

ASME Angle Choke Valve Dimensions

Trim Model (A x B) „A“ (mm)³ „B“ (mm)³ „C“ (mm) „CMO“(mm)⁴ Weight (Kg)⁵ Max. Cv⁶

¹⁄₂
(12) 4“ x4“-600# 17,32(439) 9,16(232) 32,7 (830) 40,9 (1040) 200 (90) 5,5

6“ x6“-600# 23,28 (591) 18,40(467) 43,9 (1115) 54,9 (1395) 430 (195)

2“ x2“-900# 10,41(264) 8,22 (209) 17,9(455) 27,0(685) 120 (55)

3“ x3“-900# 8,47 (215) 130 (60)

4“ x4“-900# 17,82 (452) 9,66(245) 33,1 (840) 41,3 (1050) 220 (100)

6“ x6“-900# 24,16 (613) 19,28(489) 45,9 (1165) 57,5 (1460) 465 (210)

2“ x2“-1500# 9,88(251) 7,77 (197) 25,0(635) 31,3(795) 120 (55)

3“ x3“-1500# 11,00 (280) 9,06(230) 25,6(650) 32,1(815) 165 (75)

4“ x4“-1500# 18,17 (460) 10,01(254) 33,5 (850) 41,9 (1065) 265 (120)

6“ x6“-1500# 25,38 (643) 20,50(519) 66,9 (1700) 83,7 (2125) 530 (240)

2“ x2“-2500# 11,44 (291) 9,25(230) 31,5(660) 32,5(825) 165 (75)

3“ x3“-2500# 13,00 (330) 11,06(281) 27,6(700) 41,3(1050) 220 (100)

4“ x4“-2500# 20,76(526) 12,63(320) 36,0 (915) 45,3 (1150) 440 (200)

6“ x6“-2500# 29,38 (744) 24,50 (620) 49,8 (1265) 62,4 (1585) 880 (400)

⁵⁄₈
(16) 2“ x2“-600# 9,88(251) 7,77 (197) 14,8(375) 22,2(565) 55 (25) 10,5

3“ x3“-600# 9,66 (245) 7,72(196) 17,1(435) 25,6(650) 110 (50)

4“ x4“-600# 17,32(439) 9,16(232) 32,7 (830) 40,9 (1040) 200 (90)

6“ x6“-600# 23,28 (591) 18,40(467) 43,9 (1115) 54,9 (1395) 430 (195)

2“ x2“-900# 10,41(264) 8,22 (209) 17,9(455) 27,0(685) 120 (55)

3“ x3“-900# 8,47 (215) 130 (60)

4“ x4“-900# 17,82 (452) 9,66(245) 33,1 (840) 41,3 (1050) 220 (100)

6“ x6“-900# 24,16 (613) 19,28(489) 45,9 (1165) 57,5 (1460) 465 (210)

Trim	Model (A x B)	„A“ (mm)³	„B“ (mm)³	„C“ (mm)	„CMO“(mm)⁴	Weight (Kg)⁵	Max. Cv⁶
¹⁄₂ (12)	4“ x4“-600#	17,32(439)	9,16(232)	32,7 (830)	40,9 (1040)	200 (90)	5,5
6“ x6“-600#	23,28 (591)	18,40(467)	43,9 (1115)	54,9 (1395)	430 (195)
2“ x2“-900#	10,41(264)	8,22 (209)	17,9(455)	27,0(685)	120 (55)
3“ x3“-900#	8,47 (215)	130 (60)
4“ x4“-900#	17,82 (452)	9,66(245)	33,1 (840)	41,3 (1050)	220 (100)
6“ x6“-900#	24,16 (613)	19,28(489)	45,9 (1165)	57,5 (1460)	465 (210)
2“ x2“-1500#	9,88(251)	7,77 (197)	25,0(635)	31,3(795)	120 (55)
3“ x3“-1500#	11,00 (280)	9,06(230)	25,6(650)	32,1(815)	165 (75)
4“ x4“-1500#	18,17 (460)	10,01(254)	33,5 (850)	41,9 (1065)	265 (120)
6“ x6“-1500#	25,38 (643)	20,50(519)	66,9 (1700)	83,7 (2125)	530 (240)
2“ x2“-2500#	11,44 (291)	9,25(230)	31,5(660)	32,5(825)	165 (75)
3“ x3“-2500#	13,00 (330)	11,06(281)	27,6(700)	41,3(1050)	220 (100)
4“ x4“-2500#	20,76(526)	12,63(320)	36,0 (915)	45,3 (1150)	440 (200)
6“ x6“-2500#	29,38 (744)	24,50 (620)	49,8 (1265)	62,4 (1585)	880 (400)
⁵⁄₈ (16)	2“ x2“-600#	9,88(251)	7,77 (197)	14,8(375)	22,2(565)	55 (25)	10,5
3“ x3“-600#	9,66 (245)	7,72(196)	17,1(435)	25,6(650)	110 (50)
4“ x4“-600#	17,32(439)	9,16(232)	32,7 (830)	40,9 (1040)	200 (90)
6“ x6“-600#	23,28 (591)	18,40(467)	43,9 (1115)	54,9 (1395)	430 (195)
2“ x2“-900#	10,41(264)	8,22 (209)	17,9(455)	27,0(685)	120 (55)
3“ x3“-900#	8,47 (215)	130 (60)
4“ x4“-900#	17,82 (452)	9,66(245)	33,1 (840)	41,3 (1050)	220 (100)
6“ x6“-900#	24,16 (613)	19,28(489)	45,9 (1165)	57,5 (1460)	465 (210)

*NOTE

1. Additional sizes, connections, and configurations are available upon request; dimensions are subject to change.

2. Threaded, BWE, RF, RTJ, API, BX, and PE connections are available for all sizes and configurations.

3. ASME RF flanged dimensions are shown. Threaded, BWE, RTJ and ISO flanged dimensions are available upon request.

4. „CMO“ dimension is the same as the„C“ dimension shown on the drawing, with the addition of a pneumatic actuator.

5. Weights are based on a standard choke with out actuator(s), weights may vary based on trims and options selected.

6. Cv Values given are subject to variation based upon valve end connections, trim selection, wear sleeves, and other options.

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