Fully Welded DBB Trunnion Ball Valve with Pipe Extensions & Gear Operation

Size: 2" to 64" (DN50–DN1600)
Pressure: Class 600 (Optional Class 150/300/900/1500)
Operating Temp: -46℃ to 450℃ (Material Dependent)
Body Materials: Carbon Steel, Stainless Steel, Duplex/Alloy Steel (Optional)
Seat: PTFE, PCTFE, PEEK, Metal Seat
Ball Type: Trunnion-mounted, fully welded one-piece body
Sealing: Double Block-and-Bleed (DBB) with optional emergency sealant injection
End Connection: Butt Weld / Socket Weld with pipe extensions
Operation: Gear-operated (manual), optional electric or pneumatic
Stem: Short stem (optional extended)
Mounting: ISO 5211 direct mounting
Brand: SLVCN

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SLVCN

Product Description

Product Description

The SLVCN Class 600 (Optional Class 150/300/900/1500) fully welded trunnion-mounted DBB ball valve is designed for high-performance flow control in critical pipelines. Its fully welded body ensures zero external leakage, and the Double Block-and-Bleed (DBB) design provides secure isolation and safe cavity pressure relief. The trunnion-mounted ball guarantees stable sealing under high pressure and large diameters. The gear-operated mechanism ensures smooth, low-torque manual control, while the short-stem design suits above-ground installations.

With built-in fire-safe, anti-static, and anti-blowout stem features, this valve offers enhanced safety in high-risk environments. Customizable materials ensure compatibility with various temperatures and pressures, making it ideal for industries like oil & gas, chemical, power generation, and more.

SLVCN, a leading valve manufacturer, specializes in high-performance valves for extreme conditions. We provide expert solutions and our products are exported to over 100 countries worldwide.

Key Features

✓ Fully Welded Valve Body with Pipe Extensions

Ensures zero external leakage and minimizes maintenance with a seamless pipeline connection.

✓ Double Block-and-Bleed (DBB) Configuration
Provides secure isolation and controlled cavity venting for safe operation.

✓ Trunnion-Mounted Ball Design
Maintains consistent sealing under high pressure, reducing wear and extending valve life.

✓ Gear-Operated Mechanism
Low-torque operation for smooth, reliable manual control, even at full pressure.

✓ Safety Features for Critical Applications
Fire-safe, anti-static, and anti-blowout stem for safe operation in high-risk environments.

Technical Specifications

double block and bleed ball valve Dimensions: Class 600 - Full Port

Weight and dimensions for larger valve sizes up to 64" available on request

Size	Bore		Model / Face to Face				D in/mm	D1 in/mm	Weight
NPS/DN	B1in/mm	B2 in/mm	FF,FW RF in/mm	FF,FW RTJ in/mm	FF BWE in/mm	FW BWE in/mm	D in/mm	D1 in/mm	Model FF lb/kg	Model FW lb/kg
2"	1.94	1.94	11.5	11.63	11.5	11	6.5	6.5	79	79
50	49	49	292	295	292	279	166	166	36	36
3"	2.94	2.94	14	14.13	14	12.5	8.5	8.5	154	154
80	74	74	356	359	356	318	216	216	70	70
4"	3.94	3.94	17	17.13	17	14	10.9	10.9	254	254
100	100	100	432	435	432	356	276	276	115	115
6"	5.94	5.94	22	22.13	22	18	14	14	573	501
150	150	150	559	562	559	457	356	356	260	227
8"	7.94	7.94	26	26.13	26	21.5	16.6	16.6	917	827
200	201	201	660	664	660	546	421	421	416	375
10"	9.94	9.94	31	31.13	31	23.5	20.6	20.2	1636	1504
250	252	252	787	791	787	597	523	512	742	682
12"	11.94	11.94	33	33.13	33	26.5	24	23.4	2412	2200
300	303	303	838	841	838	673	610	595	1094	998
14"	13.19	13.19	35	35.13	35	28.5	25	24.2	2723	2436
350	334	334	889	892	889	724	635	615	1235	1105
16"	15.19	15.19	39	39.13	39	30.5	28.5	27.4	3860	3382
400	385	385	991	994	991	775	725	696	1751	1534
18"	17.19	17.19	43	43.13	43	33.5	32.3	31.4	5379	4755
450	436	436	1092	1095	1092	851	820	798	2440	2157
20"	19.19	19.19	47	47.25	47	35.5	35.4	35.2	6945	6442
500	487	487	1194	1200	1194	902	900	893	3150	2922
22"	21.19	21.19	51	51.38	51	38.5	38.6	38	9039	8708
550	538	538	1295	1305	1295	978	980	965	4100	3950
24"	23.19	23.19	55	55.38	55	42	42.5	40.5	11279	9965
600	589	589	1397	1407	1397	1067	1080	1028	5116	4520

Dimensions: Class 600 - Reduced Port

Size	Bore		Model / Face to Face				D in/mm	D1 in/mm	Weight
NPS/DN	B1in/mm	B2 in/mm	GG, GW RF in/mm	GG, GW RTJ in/mm	GG BWE in/mm	GW BWE in/mm	D in/mm	D1 in/mm	Model GG lb/kg	Model GW lb/kg
2"X 11/2"	1.94	1.5	11.5	11.63	11.5	11	6.5	6.5	68	68
50X40	49	38	292	295	292	279	166	166	31	31
3"X2"	2.94	1.94	14	14.13	14	12.5	8.3	8.3	110	110
80X50	74	49	356	359	356	318	211	211	50	50
4"X3"	3.94	2.94	17	17.13	17	14	10.9	10.9	209	209
100X80	100	74	432	435	432	356	276	276	95	95
6"X4"	5.94	3.94	22	22.13	22	18	14	14	386	386
150X100	150	100	559	562	559	457	356	356	175	175
8"X6"	7.94	5.94	26	26,13	26	21.5	16.6	16.6	690	603
200X150	201	150	660	664	660	546	421	421	313	273
10"x8"	9.94	7.94	31	31.13	31	23.5	20.1	20.1	1120	1010
250X200	252	201	787	791	787	597	511	511	508	458
12"X10"	11.94	9.94	33	33.13	33	26.5	22.1	22.1	1746	1605
300X250	303	252	838	841	838	673	561	561	792	728
14"X10"	13.19	11.94	35	35.13	35	28.5	23.9	23.9	1878	1727
350X250	334	252	889	892	889	724	606	606	852	783
14"X12"	13.19	11.94	35	35.13	35	28.5	23.9	23.9	2469	2253
350X300	334	303	889	892	889	724	606	606	1120	1022
16"X12"	15.19	11.94	39	39.13	39	30.5	27	27	2877	2625
400X300	385	303	991	994	991	775	686	686	1305	1190
20"X16"	19.19	15.19	47	47.25	47	35.5	32.1	32.1	4577	4010
500X400	487	385	1194	1200	1194	902	816	816	2076	1819
24"X20"	23.19	19.19	55	55.38	55	42	37	37	7886	7315
600X500	589	487	1397	1407	1397	1067	941	941	3577	3318
28"X24"	26.94	23.19	61	61.5	61	47	42.5	42.3	12103	10693
700X600	684	589	1549	1562	1549	1194	1080	1075	5490	4850
30"X24"	28.94	23.19	65	65.5	65	49	44.5	44.5	12899	11397
750X600	735	589	1651	1664	1651	1245	1131	1131	5851	5169