Carbon and Stainless Steel 3-Piece Trunnion Ball Valve

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3-Piece Trunnion Ball Valve - API 6A

DIMENSIONAL

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COMPONENT IDENTIFICATION

MODEL I - BOLTED BODY CONSTRUCTION

MODEL E - BOLTED BODY CONSTRUCTION

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DESIGN AND MANUFACTURING STANDARDS

Basic Design	API 6A
Shell Wall Thickness	API 6A
Face to Face Dimension	API 6A
Flange End Dimension	API 6A
Inspection & Testing	API 6A
Fire Safe Design	API 607/BS 6755

BILL OF MATERIALS

NO	NAME OF PART	MATERIALS
1	Body	4130		A182, F316
2	Closure	4130		A182, F316, A351, CF8M
3	Stem	AISI 1045 ENP, AISI 4140 ENP	AISI 4140 ENP	316 SS, 17-4 PHSS
4	Seat Ring	A105 ENP, A106 ENP	A350, LF2 ENP	316 SS
5	Ball	A105 ENP	A350, LF2 ENP	A182F316, A351, CF8M
6	Seat Insert	Nylon, PEEK
7	Trunnion	AISI 1045, AISI 4140		316 SS, 410
7-1	Trunnion Block	AISI 1045, AISI 4140		316 SS, 410
7-2	Trunnion Block Pin	AISI 410		316 SS, 410
8	Gland	AISI 1045		316 SS, 410
9	Adapter Plate	AISI 1045		316 SS, 410
10	Stem O-ring/ Lipseal	Viton	Viton GLT	Viton
11	Stem O-ring	Viton	Viton GLT	Viton
12	Gland O-ring	Viton	Viton GLT	Viton
13	Seat O-ring/LIPSEAL	Viton	Viton GLT	Viton
14	Seat Subseal	Viton, Graphite	Viton GLT, Graphite	Viton, Graphite
15	Closure O-ring	Viton	Viton GLT	Viton
16	Trunnion O-RING	Viton	Viton GLT	Viton
17	Backup Ring	Nylon
18	Gland Seal	Graphite SEAL
19	Body Seal	Graphite SEAL
20	Trunnion Seal	Graphite SEAL
21	Stem Packing	Graphite
22	Seat Spring	Inconel X-750, 17-4 PHSS
23	Bearing	PTFE, Carbon Steel		PTFE, 316SS
24	Thrust Washer	PTFE, Carbon Steel		PTFE, 316SS
25	Sealant Fitting	Carbon Steel, SS Ball Check		316SS, SS Ball Check
26	SOcket Bolt	A574		316 SS
27	Hex/Socket Bolt	A574		316 SS
28	Stud Bolt	A193 B7M	A320 L7M	A193 B8
29	Hex Nut	A194 2HM	A194 7M	A194 8
30	Grounding Pin	Stainless Steel
31	Grounding Spring	Stainless Steel
32	Key	Carbon Steel		Stainless Steel
33	Dowel Pin	Carbon Steel		Stainless Steel
34	Relief Plug	Carbon Steel		Stainless Steel
35	Drain Plug	Carbon Steel		Stainless Steel
36	Mounting Plate	Carbon Steel		Stainless Steel
37	Gear Operator	Ductile Iron Case, Carbon Steel Worm Gear
38	Hand Wheel	Carbon Steel, Ductile Iron
NOTE: Materials also available in F321, F347, F51, F53, monel, inconel, incolloy and hastelloy. Metal-to-metal seated ball valve designs are available upon request. NOTE: Additional materials available upon request

DESIGN FEATURES AND APPLICATIONS

SCV’s standard ball valves have been designed to API’s highest standards. Complete Split body & Fully welded design offers maximum protection against line pressure and thermal distortion with long life and trouble-free performance. SCV is supplying its products to the Crude oil transport and processing, Power engineering, Water supply systems and Process Industries throughout the world.
Seal Feature SCV ball valves are produced with spring-loaded seats. This spring load keeps the seat in contact with the ball even in absence of line pressure and makes very efficient seal at low line pressure.As line pressure increases, the seat area creates a piston effect which forces the seat against the ball, therefore a tight seal becomes effective. If the pressure is higher, the force exerted by the seat on the ball is increased by action of the pipeline pressure. Therefore, the higher the line pressure, the greater the piston action. Self Lubrication Self lubrication, low friction PTFE is used for trunnion and stem bearings. NYLON or other low friction materials are used for seat inserts. Self lubricating seals and stem bearing give predictable operating torque for the life of the valve. Fire Safe Construction with Secondary Metal Seat SCV’s ball valves have been fire tested and can be supplied to API 6FA and API 607. The soft seat inserts, irrespective of their materials, will possibly fail when subjected to sudden high temperature conditions. SCV provides a fire-safe design which may substantially prevent leakages through seals when damaged by high temperature. The function of the seats before and after the fire test is shown on the sketches. If the seat inserts are destroyed or burned out, a metal to metal seal is formed between the lower diameter of the seat and ball, while the seat to body seals, the stem packing and the end connections to body seals are designed to resist high temperature and will remain undamaged. (See Figures 1 & 2)
Trunnion Mounting Trunnion mounted stems absorb the thrust from line pressure, preventing excess friction between the ball and seats, so even at full rated working pressure, operating torque stays low. (See Figure 3)
Body Vent and Drain The body cavity may be vented in both open and closed state. (See Figure 4)
Double Block and Bleed The seats are of both-side-sealing type, which means that they seal both on the upstream or downstream side of the ball valve and inside the valve. Whether in the open or closed position, pressure on each side of the ball is blocked from the body cavity by the seat rings engineered to self relieve. No pressure build up can occur in to body cavity. The body cavity can then be vented to the atmosphere or drained through the body port. (See Figure 5)
Sealant Fitting Sealant lubrication fittings come as a standard with SCV’s design. In the event of seat insert or stem seal damage, external or internal leakage can occur. Emergency sealant injection can save the integrity of the valve by incorporating a sealant seal around the stem or between the seat and the ball until such time the valve may be properly serviced. (See Figures 6, 7 & 8)
Antistatic Device The springs provided at the stem allow the static charges to be led to the piping. In this way, an electrostatic charging of the ball is eliminated. (See Figure 9) Stem Seal with Blow-out Proof Stem The stem is independent of the ball and is a blow-out proof design. As an integral part, a stem has a flange at its lower side. The stem flange prevents the stem from blowingout. This feature also allows replacement of stem packing while the valve is under pressure.The torque is transmitted to the ball by a generously proportioned mating joint, hence the stem is not affected by the side thrust.

BALL VALVE FLOW COEFFICIENCY (Cv)

The Flow Coefficiency (Cv) of a valve is the rate of gallons per minute of water at 60° F through a fully opened valve at a pressure drop of 1 PSI across the valve.

SIZE in	PRESSURE
SIZE in	2000	3000	5000
2-1/16	350	320	320
2-9/16	190	185	180
3-1/8	1,000	910	820
4-1/16	1,850	1,760	1,610
7-1/16	4,400	4,300	4,080
9	8,450	8,400	7,980
11	14,250	14,160	13,020
13-5/8	22,790	21,230	16,910

TRUNNION MOUNTED BALL OPERATING TORQUE

The operating torques are in foot pounds and are calculated based on soft seats, normal temperatures, and clean media.

SIZE in	PRESSURE
SIZE in	2000	3000	5000
2-1/16	1,413	1,843	5,749
2-9/16	1,413	1,843	5,749
3-1/8	4,103	5,405	9,951
4-1/16	5,651	10,196	18,427
7-1/16	12,284	23,095	46,068
9	24,569	44,224	67,566
11	43,979	64,864	92,871
13-5/8	66,216	90,661	120,388

PRESSURE 2000 - Trunnion Mounted Ball Valves - API 6A

DIMENSIONS & WEIGHTS

SIZE in	BORE	END TO END DIMENSIONS	BODY DIMENSIONS			FLANGED WEIGHT
SIZE in	F	A - RTJ	H1	H2	H3	LB	KG
2-1/16	2.09	1 1 .625	4.44	6.50	8.90	68	31
2-9/16	2.59	14.125	5.22	7.28	9.68	79	36
3-1/8	3.22	14.125	5.56	8.69	11.09	119	54
4-1/16	4.28	17.125	6.50	9.56	11.96	218	99
7-1/16	5.16	22.125	8.69	12.19	14.59	598	272
9	7.16	26.125	9.47	13.29	15.59	697	317
11	11.03	31.125	12.13	16.63	19.78	1696	771
13-5/8	13.66	33.125	13.88	18.69	21.84	2193	997

PRESSURE 3000 - Trunnion Mounted Ball Valves - API 6A

DIMENSIONS & WEIGHTS

SIZE in	BORE	END TO END DIMENSIONS	BODY DIMENSIONS			FLANGED WEIGHT
SIZE in	F	A - RTJ	H1	H2	H3	LB	KG
2-1/16	2.09	14.625	4.44	7.28	10.90	119	54
2-9/16	2.59	15.125	5.22	8.06	11.64	139	63
3-1/8	3.22	15.125	5.56	9.47	13.05	178	81
4-1/16	4.28	18.125	6.50	10.34	13.92	319	145
7-1/16	5.16	24.125	8.69	12.97	16.55	697	317
9	7.16	29.125	10.38	15.58	19.10	1547	703
11	11.03	33.125	12.13	17.41	21.74	1846	839
13-5/8	13.66	38.125	13.88	19.47	23.80	2593	1315

PRESSURE 5000 - Trunnion Mounted Ball Valves - API 6A

DIMENSIONS & WEIGHTS

SIZE in	BORE	END TO END DIMENSIONS	BODY DIMENSIONS			FLANGED WEIGHT
SIZE in	F	A - RTJ	H1	H2	H3	LB	KG
2-1/16	2.09	14.625	6.50	4.44	8.90	119	54
2-9/16	2.59	18.625	7.28	5.22	9.68	170	77
3-1/8	3.22	18.625	8.69	5.56	11.09	240	109
4-1/16	4.28	21.625	9.56	6.50	11.96	420	191
7-1/16	5.16	28.00	12.19	8.69	14.59	1190	541
9	7.16	33.125	14.80	10.38	17.20	1936	880
11	11.03	39.375	16.63	12.13	19.78	3420	1555
13-5/8	13.66	45.125	18.69	13.88	21.84	5120	2327