½” thru 36”Class 150 to Class 2500 Long Bonnet Ball Valve Our Design, Suitable For Need Keeping Warm And Cold Fluid Application

Model NO. Long Bonnet Ball Valve

-Rate Range Class 150 to Class 2500
-Size Range ½” thru 36” (Class Dependent)
-Full and Reduced Bore
-Body Wall Thickness ASME B16.34
-End Connections: RF, RTJ, BW, SW, NPT, BSP, Special
-Extended bonnet protects the stuffing box of the low temperature valve
-Extended bonnet structure facilitates the winding of the cold-preserving material to prevent the cold energy loss of the low temperature valve
-The long neck structure facilitates the quick replacement of the valve’s main part through the valve cover

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Long Bonnet Ball Valve

S J COMPANTY AS THE Long Bonnet Ball Valve suppliers IN Generally valve body adopts investment casting technology. Advanced technology to ensure that the valve body has no sand holes, surface more smooth and quality more reliable.

S J ball valves for water go through the painstaking design and rigorous quality testing to achieve next-level performance.

Technical specification
Design reference		API	ASME	rOCT
Design standard		API6D	ASME B16.34	/
Structural length	Flanged ends	API6D	ASEM B16.10	/
	Welded connection
Flanged ends		ASME B16.5/ASME B16.47		rOCT 33259 rOCT 12815
Butt-welding ends		ASME B16.25
Test&inspection		API6D	API598	rOCT 9544

Notes:The sizes of valve connectingflange and butt-welding terminas can be designed according to customer's requirement.

Main material
	Part Name	Main Material		Part Name	Main Material
1	Body	WCB,LCB,LCC,4A,CF8,CF3,CF3M,CF8M,G20Mn5. Inconel,Monel,Alloysteel,Aluminium Bronze	17	Drain plug	Component
2	Cover		18	Grease injection valve	Matching with valve body
3	Ball	A105,LF2,F304,F304L,F316,F316L,F321,F416,F440CF5	19	Anti static device	IncX-750
4	Seat Retainer	A105,LF2,F304,F304L,F316,F316L,F321,F416,F440CF5	20	Spring	IncX-750
5	Seat Seal	PTFE,RPTFE,DEV,NLY,PPL,POM,PEEK,+STL,+TCC,+Ni60	21	Hexagon socket screw	B7,B7M,L7,L7M,Inconel,Monel,Alloy steel,Aluminium Bronze
6	Stem	410,LF2,F304,F304L,F316,F316L,F321,F416,F440C,F51, Inconel,Monel,Alloy steel,Aluminium Bronze	22	Metal winding gasket	SS+Graphite
7	Thrust Washer	PTFE	23	O Ring	HNBR,VITON,VITONAED,VITON GTL
8	Pin	1035	24	Nut	2H,2HM,7,7M,Inconel,Monel,Alloy steel,Aluminium Bronze
9	O Ring	HNBR,VITON,VITONAED,VITON GTL	25	Stud	B7,B7M,L7,L7M,Inconel,Monel,Alloy steel,Aluminium Bronze
10	Spiral Wound Gasket	SS+Graphite	26	Flexible graphite braided filler	Graphite
11	Connecting flange	Matchingwith valve body	27	O Ring	HNBR,VITON,VITONAED,VITON GTL
12	Key	1035	28	O Ring	HNBR,VITON,VITONAED,VITON GTL
13	O Ring	HNBR,VITON,VITONAED,VITON GTL	29	Metal gasket	SS+Graphite
14	Hexagon socket screw	B7,B7M,L7,L7M,Inconel,Monel,Alloy steel,Aluminium Bronze	30	Drain plug	Component
15	Bearing	SS+Graphite	31	Worm Gear	Assembly
16	Trunnion	Matching with valve body
Notes:Major parts of the valve seriesand materials of sealing surface differ according to actual working condition and customer's special requirement.

Long Bonnet Ball Valve
Full bore
Nominal Size		D		L		H1		H2		W		Weight
in	mm	in	mm	in	mm	in	mm	in	mm	in	mm	Lb	kg
2	50	2.01	51	11.5	292	7.87	200	4.33	110	10.43	265	46.3	21
3	80	2.99	49	14.0	356	11.81	300	4.98	126	11.22	285	70.8	32
4	100	3.94	100	17.0	432	12.4	315	6.5	185	11.22	285	110.2	50
6	150	5.91	150	22.0	559	13.19	335	6.5	185	11.81	300	381.8	164
8	200	7.91	201	26.0	660	15.94	405	7.87	200	11.81	300	780.6	300
10	250	9.92	252	31.0	787	16.81	427	8.67	220	11.81	300	970.0	440
12	300	11.93	303	33.0	838	18.31	465	10.31	282	19.69	500	1272.1	577
14	350	13.15	334	35.0	889	19.92	506	11.54	293	23.82	600	1893.7	859
16	400	15.16	385	39.0	991	24.49	622	13.43	341	23.62	600	2522.1	1114
18	450	17.16	436	43.0	1092	26.22	666	16.22	412	23.62	600	3174.6	1440
20	500	19.17	487	47.0	1194	28.74	730	17.13	435	23.62	600	4285.7	1944
22	550	21.18	538	51.0	1295	32.8	833	18.9	480	23.62	600	5185.2	2352
24	600	23.19	589	550	1397	35.24	895	20.39	518	31.5	800	6179.5	2803
26	650	24.92	633	57.0	1448	35.43	900	24.06	535	31.5	800	7054.7	3200
28	700	26.93	684	61.0	1549	36.81	905	21.34	480	31.5	800	8924.2	2352
24	750	28.94	735	65.0	1651	39.76	1010	23.82	542	31.5	800	13868.4	2803
32	800	30.66	779	70.0	1778	41.73	1060	25.59	650	31.5	800	12103.2	3200
34	850	32.68	830	76.0	1930	42.4	1077	25.59	650	31.5	800	14779.5	6704
36	900	34.41	874	82.0	2083	43.9	1115	27.56	700	31.5	800	21164.0	9600

The above parameters are based on Class 150 (1.6~2.5 MPa) and are for reference only. For detailed information, please consult the technical team.

FAQ for S J Long Bonnet Ball Valve

Q1: What is a Long Bonnet Ball Valve?

Answer: The long bonnet ball valve is a ball valve with an extended bonnet and stem design. The longer stem distance helps protect the sealing system and actuator from extremely high or low temperatures, making it suitable for applications where thermal insulation, heat tracing, or temperature stability is required. It provides reliable on-off control and isolation for process pipelines.

Conclusion from S J: S J Long Bonnet Ball Valve adopts an extended bonnet structure to improve thermal protection and ensure stable valve operation in demanding temperature conditions.

Q2: Why choose a long bonnet ball valve instead of a standard ball valve?

Answer: A standard ball valve may be affected by extreme process temperatures, which can reduce seal life or affect actuator performance. The long bonnet design increases the distance between the process medium and the upper sealing area, reducing heat transfer and improving safety. It is especially useful for high-temperature steam, hot oil, and other thermal applications.

Conclusion from S J: S J recommends long bonnet ball valves for high-temperature applications to reduce thermal impact on upper seals and improve overall valve reliability.

Q3: What working conditions and media are suitable for S J Long Bonnet Ball Valves?

Answer: Our long bonnet ball valves are suitable for high-temperature steam, hot oil, thermal oil, and other process media that require thermal protection. We can adjust body, trim, and sealing materials according to your temperature, pressure, and medium characteristics.

Conclusion from S J: S J can customize material and bonnet configurations to meet your specific high-temperature pipeline requirements.

Q4: Where are S J Long Bonnet Ball Valves commonly used?

Answer: Long bonnet ball valves are widely used in refineries, petrochemical plants, thermal oil systems, steam pipelines, and high-temperature process lines. They are often selected for reliable isolation and extended service life under harsh thermal conditions.

Conclusion from S J: S J Long Bonnet Ball Valve is a dependable choice for high-temperature isolation in oil, gas, petrochemical, and thermal process systems.

S J Overall Conclusion

S J Long Bonnet Ball Valve features an extended bonnet and stem design, which provides better thermal protection for the upper sealing system and actuator compared with standard ball valves. It is engineered for high-temperature steam, hot oil, and thermal process applications, offering reliable isolation, reduced thermal impact, and long service life. With customizable material options, it is a robust valve solution for demanding oil, gas, and petrochemical projects.

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Head Office Address: Viale del Lavoro.19,20003 Casorezzo Ml. Italy Testing zone
Address:Via S. Giovanni Bosco S.n.c.70020 – Poggiorsini (BA) – ITALY

EMAIL: andant@sanjingvalve.com
PHONE: +39 389 949 9067
WHATSAPP: +39 389 949 9067

Branch Office Address: Dongou Industrial Zone, Oubei Street, Yongjia Wenzhou City, Zhejiang Province China Testing zone 2 Address:No. 205, Linwu Road, Sanqiao Industrial Zone

What exactly is the relationship between SANJING Valve Company and SJ Valvole S.R.L.?

SANJING Valve Company is the main manufacturing company, responsible for valve production, quality control, testing, and technical support. SJ Valvole S.R.L. serves as SANJING’s Italian office, supporting its business development, customer communication, and commercial activities in Italy and the European market.

Integrated Manufacturing and European Service

The two operations work together to provide customers with coordinated manufacturing and local market support:

Manufacturing & Quality Control: SANJING Valve Company manages valve manufacturing, inspection, testing, and quality control at its production facilities.

European Market Support: SJ Valvole S.R.L. supports customer communication, commercial coordination, and business development in Italy and other European markets.

Project Coordination: Customer requirements, technical specifications, documentation, production, and delivery can be coordinated between the Italian office and the manufacturing team.

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