1/2" to 14" Metal Seated Ball Valve Severe Service Metal-Seated Ball Valves For High Temperature, Abrasive And Corrosive Applications.

Model NO. Metal Seated DBB Ball Valve

The Metal Seated Ball Valve 1/2 inch (13 mm) to 14 inch (356 mm). Pressure max. 160 bar. Temperature range -196 °C to +500°C

Design – Every single ATEC-ball valve can be designed with a metal seated ball system.

DESIGN STANDARD: ANSI B16.34 / EN17292 / ASME VIII Div.1 / EN 12516-1

SCARTAMENTO:ASME B16.10 / EN 558

ESTREMITÀ:A105 / A350 LF2 / AISI 316 / AISI 304 / altri materiali su richiesta

Quantity

Metal Seated DBB Ball Valve

SJ Metal Seated Ball Valve’s ball and seat are machined to such precise tolerances that ball and seat lapping does not have to be performed individually for each valve – making both the ball and seat freely interchangeable (if equal in nominal size). Its trunnion mounted ball design offers a polygon stem-to-ball connection, which reduces stress and ensures optimal torque transmission. An additional feature is its self-cleaning system which removes excess particles, minimizes leakage, and extends product life. Other key options include a fire-safe design body gasket and removable hand lever. To ensure that the Metal to metal seated ball valves meets the considerably higher benchmark of leak protection required for Isolation service, it is typically tested for 60 minutes at 300 psig Nitrogen with a permissible leakage rate of level VI (versus the standard test API 598 of 2 minutes at 70 psig under identical conditions

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.

Metal Seated DBB 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

The above parameters are based on Class150--1.6~2.5MPa and are for reference only. For detailed information, please consult the technical team.

FAQ for S J Metal Seated DBB Ball Valve

Q1: What is a Metal Seated DBB Ball Valve?

Answer: The metal seated DBB ball valve is an integrated single-body valve with metal-to-metal sealing seats, featuring two independent sealing surfaces and a bleed port in the intermediate cavity. When fully closed, it can block pressure from both sides and release trapped cavity pressure safely. The metal seat structure enables stable operation under high temperature and heavy-duty working conditions, widely used for critical isolation in oil, gas and petrochemical systems.

Conclusion from S J: S J Metal Seated DBB Ball Valve combines double block & bleed function with robust metal sealing to deliver reliable high-temperature isolation performance.

Q2: What is the difference between metal seated DBB ball valve and soft seated DBB ball valve?

Answer: Soft seated DBB valves rely on non-metallic sealing materials. They have good sealing performance at normal temperature but are not suitable for high temperature, abrasive medium or harsh working conditions. Metal seated DBB ball valves adopt metal-to-metal seat contact. They can withstand high temperature, abrasive media and frequent operation, maintaining sealing integrity under extreme working environments.

Conclusion from S J: S J recommends metal seated DBB ball valves for your high-temperature, abrasive or heavy-duty isolation projects where soft seats cannot survive.

Q3: What working conditions and media can S J Metal Seated DBB Ball Valve handle?

Answer: Our metal seated DBB ball valves can operate at elevated temperatures and handle various process media including crude oil, natural gas, steam and media with tiny solid particles. We can customize valve body and seat material selection according to your site temperature, pressure and medium properties.

Conclusion from S J: S J can tailor material configurations of metal seated DBB ball valves to match your unique high-temperature and abrasive working conditions.

Q4: Where are S J Metal Seated DBB Ball Valves commonly applied?

Answer: This type of valve is chosen for critical isolation scenarios with high temperature or abrasive media, such as refinery process lines, high-temperature gas pipelines, heavy oil systems and metering skids. It isolates equipment safely for maintenance and verifies sealing integrity via the built-in bleed port.

Conclusion from S J: S J Metal Seated DBB Ball Valve acts as the ideal heavy-duty isolation solution for high-temperature oil & gas and petrochemical process systems.

S J Overall Conclusion

S J Metal Seated DBB Ball Valve features integrated double block and bleed structure, metal-to-metal sealing, reduced leak paths and dependable cavity pressure relief. Compared with soft seated DBB valves, it offers superior durability under high temperature and abrasive service. It can be customized for different process media and site conditions, serving as a reliable heavy-duty valve solution for global 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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