Double block and bleed ball valve, WCB cast steel, flanged ends, API 6D compliant

Double Block & Bleed Ball Valve bottom view

Double Block & Bleed Ball Valve one side flange

Double Block & Bleed Ball Valve thread end

Double Block & Bleed Ball Valve – WCB Cast Steel, Flanged Ends, API 6D Compliant

Technical Specifications:

1. Design and manufacture according to: API 6D, BS 5351;
2. Connection flange ends according to: ANSI B16.5;
3. Test and inspection according to: API 598.
4. Structure features: floating ball;
5. Material conform to : ANSI/ASTM
6. Main Material: A105(N), LF2, F304(L), F316(L), F51, F91, F11, F22, F321, etc.

Product Summary

The double block and bleed ball valve provides enhanced safety and reliability in oil, gas, and chemical processing systems. Made from ASTM A216 WCB cast steel, it withstands temperatures up to 425°C and offers excellent mechanical strength. Its integrated design features two main shut-off valves and a central bleed port, enabling dual isolation with cavity venting—critical for maintenance safety. With flanged ends per ANSI B16.5, installation is straightforward and secure. Compliant with API 6D and 100% tested per API 598, the valve ensures bubble-tight shut-off using soft-seated PTFE seals. Ideal for high-integrity applications where zero leakage and operational safety are non-negotiable. Trust SFANVALVE for precision-engineered double block and bleed ball valves built for performance and compliance.

Brand	SFAN VALVE OR "OEM"
Flow bore	Standard bore or Full bore
Material	Carbon steel, Stainless steel, Alloy steel or other
Dimension	DN10(1/4") to DN100(4")
Class	150~2500
Medium	Water, oil &gas.
Temperature	-196℃(cryogenic design) to 560℃
Valve test	100% quantity tested before delivery
Valve guarantee	18 months after shipments and 12 months after installed
Packing	Plywood or carton cases
Delivery time	7 days to 30 days
Place of Origin	Zhejiang, China

3D VIDEO

Catalog details:

Pressure rating	Nominal Diameter			Flanged		Butt welding	Raised face flange							General		Support board		Weight(kg)
Class	NPS	DN	d	L(RF)	L(RTJ)	L(bw)	D	D1	D2	D3	f	b	N-φd	H	H1	H	H1	General	Support board
150	2"	50	50	178	191	216	150	120.5	92	-	2	14.5	4-φ19	93	88	-	-	19	-
150	3"	80	75	203	216	263	190	152.5	127	-	2	17.5	4-φ19	118.5	117	-	-	28	-
150	4"	100	100	229	241	305	230	190.5	157	-	2	22.5	8-φ19	143.5	137	-	-	50	-
150	6"	150	150	394	406	457	280	241.5	216	-	2	24	8-φ22	208	178.5	-	-	160	-
150	8"	200	201	457	470	521	345	298.5	270	-	2	27	8-φ22	248	222	248	235	270	284
150	10"	250	252	533	546	559	405	362	324	-	2	29	12-φ25	294	265	294	288	415	436
150	12"	300	303	610	622	635	485	432	381	-	2	30.5	12-φ25	344.5	308.5	345	330	660	693
150	14"	350	334	686	699	762	535	476	413	-	2	33.5	12-φ29	377	334	377	360	890	935
150	16"	400	385	762	775	838	595	540	470	-	2	35	16-φ29	418	375	418	400	1080	1134
150	18"	450	436	854	876	914	635	578	533	-	2	38.5	16-φ32	463	410	463	435	1480	1554
150	20"	500	487	914	927	991	700	635	584	-	2	41.5	20-φ32	502	458	502	484	1970	2069
150	24"	600	589	1067	1080	1143	815	749.5	692	-	2	46.5	20-φ35	586	534	586	568	3000	3150
150	26"	650	633	1143	-	1245	870	806.5	749	-	2	28	24-φ35	626	582	626	594	3612	3793
150	28"	700	684	1245	-	1346	927	864	800	-	2	71	28-φ35	644	605	644	638	4402	4622
150	30"	750	735	1346	-	1397	984	914.5	857	-	2	75	28-φ35	720	672	720	671	5112	5368
150	32"	800	779	1372	-	1524	1060	978	914	-	2	81	28-φ41	742	704	742	746	6667	7000
150	36"	900	874	1524	-	1727	1168	1086	1022	-	2	90	32-φ41	839	796	839	791	8627	9058
150	40"	1000	976	1753	-	-	1289	1200	1124	-	2	90	36-φ41	913.5	866	913.5	863	12313	12929
150	42"	1050	1020	1855	-	-	1346	1257	1194	-	2	97	36-φ41	943	881	937	863	14000	14700
150	48"	1200	1166	2134	-	-	1511	1422	1359	-	2	108	44-φ41	1097	1016	1097	1066	21470	22544
150	56"	1400	1360	2489	-	-	1746	1651	1575	-	2	124	48-φ48	1302	1186	1302	1253	33431	35103
300	2"	50	50	216	232	216	165	127	92	-	2	21	8-φ19	93	88	-	-	22	-
300	3"	80	75	283	298	283	210	168.5	127	-	2	27	8-φ22	118.5	117	-	-	38	-
300	4"	100	100	305	321	305	255	200	157	-	2	30.5	8-φ22	143.5	137	-	-	60	-
300	6"	150	150	403	419	457	320	270	216	-	2	35	12-φ22	208	178.5	-	-	180	189
300	8"	200	201	502	518	521	380	330	270	-	2	40	12-φ25	248	222	248	235	295	310
300	10"	250	252	568	584	559	445	387.5	324	-	2	46.5	16-φ29	294	265	294	288	450	473
300	12"	300	303	648	664	635	520	451	381	-	2	49.5	16-φ32	344.5	308.5	345	330	700	735
300	14"	350	334	762	779	762	585	514.5	413	-	2	52.5	20-φ32	377	334	377	360	1160	1218
300	16"	400	385	838	854	838	650	571.5	470	-	2	56	20-φ35	423	380	423	345	1340	1407
300	18"	450	436	914	930	914	710	628.5	533	-	2	59	24-φ35	463	410	463	431	1610	1691
300	20"	500	487	991	1010	991	775	686	584	-	2	62	24-φ35	502	458	502	474	2200	2310
300	24"	600	589	1143	1165	1143	915	813	692	-	2	68.5	24-φ41	592	549	592	561	3460	3633
300	26"	650	633	1245	-	1245	972	876.5	749	-	2	79	28-φ45	633	590	633	601	4017	4218
300	28"	700	684	1346	-	1346	1035	940	800	-	2	86	28-φ45	680	670	680	636	4974	5223
300	30"	750	735	1397	-	1397	1092	997	857	-	2	92	28-φ48	730	732	730	781	5681	5965
300	32"	800	779	1524	-	1524	1149	1054	914	-	2	98	28-φ51	765	720	765	716	6687	7179
300	36"	900	874	1727	-	1727	1270	1168	1022	-	2	105	32-φ54	847	804	847	870	8713	9058
300	40"	1000	976	1956	-	-	1238	1156	1086	-	2	114	32-φ45	921	877	921	871	12299	12914
300	42"	1050	1020	2083	-	-	1289	1206.5	1137	-	2	119	32-φ45	936	900	936	890	14379	15098
300	48"	1200	1166	2170	-	-	1476	1372	1302	-	2	134	32-φ51	1093	1052	1093	1040	21482	22556
300	56"	1400	1360	2743	-	-	1708	1600	1518	-	2	154	48-φ60	1263	1216	1263	1203	34066	35769

Pressure rating Class	NPS	DN	d	L(RF)	L(RTJ)	L(BW)	D	D1	D2	D3	f	N	N-Φd	H	H1	Weight (Kgs)
900	2"	50	60	510	610	610	215	165	124	95.25	7.92	38.5	8-Φ25	126.5	105	△
900	3"	80	75	660	663	660	240	190.5	165	123.83	7.92	38.5	8-Φ25	150	130	△
900	4"	100	100	826	829	826	290	241.5	184	149.23	7.92	45	8-Φ32	172.5	158	△
900	6"	150	150	1054	1057	1054	380	317.5	241	211	7.92	56	12-Φ32	230	210	△
900	8"	200	201	1295	1298	1295	470	393.5	308	269.88	7.92	64	12-Φ39	290	255	△
900	10"	250	252	1473	1476	1473	545	470	362	323.85	7.92	70	16-Φ39	330	316	△
900	12"	300	303	1651	1654	1651	610	533	419	381	7.92	79.5	20-Φ39	366	351	△
900	14"	350	322	1889	1889	1880	640	559	467	419.1	11.13	86	20-Φ42	415	376	△
900	16"	400	373	1930	1940	1930	705	616	524	469.9	11.13	89	20-Φ45	452	421	△
1500	2"	50	60	610	610	610	215	165	124	95.25	7.92	38.5	8-Φ25	126.5	105	△
1500	3"	80	75	826	829	826	265	203.2	168	136.53	7.92	42	8-Φ32	168	149	△
1500	4"	100	100	965	968	965	310	241.3	194	161	7.92	54	8-Φ35	219	178	△
1500	6"	150	144	1232	1238	1232	395	317.5	248	211.14	9.53	83	12-Φ39	268	234	△
1500	8"	200	192	1448	1457	1448	485	393.7	318	269.88	11.13	92	12-Φ45	303	270	△
1500	10"	250	239	1778	1787	1778	585	482.6	371	323.85	11.13	108	12-Φ51	358	336	△
1500	12"	300	287	2083	2099	2083	675	571.5	438	381	14.27	124	16-Φ54	414	395	△
1500	14"	350	315	2286	2305	2286	750	635	489	419.1	15.88	134	16-Φ60	471	441	△
1500	16"	400	360	2422	2445	2422	825	704.8	546	469.9	17.46	148	16-Φ67	498	456	△
2500	2"	50	62	762	765	762	235	174	133	101.6	7.92	51	8-Φ29	149	123	△
2500	3"	80	62	1029	1153	1029	305	228.6	168	127	9.53	67	8-Φ35	215	171	△
2500	4"	100	87	1143	1562	1143	355	273	203	157.18	11.13	76.5	8-Φ42	245	206	△
2500	6"	150	131	1549	1559	1549	485	368.3	279	226	12.7	108	8-Φ54	306	265	△
2500	8"	200	179	1880	1896	1880	550	438.2	340	279.4	14.27	127	12-Φ54	361	336	△

DOUBLE BLOCK AND BLEED VALVE — Part Materials And Main Parameters
	Nominal diameter(in)		NPS 2~16
	Nominal pressure(Class)		Class150~Class2500
Materials of Parts	No.	Part Name	ASTM A105	ASTM A182 304	ASTM A182 316	ASTM A182 304L	ASTM A182 316L
	1	Body	ASTM A105	ASTM A182 304	ASTM A182 316	ASTM A182 304L	ASTM A182 316L
	2	Spring	17-7PH	17-7PH	17-7PH	17-7PH	17-7PH
	3	Anti-fire packing	Graphite	Graphite	Graphite	Graphite	Graphite
	4	O Ring	VITON	VITON	VITON	VITON	VITON
	5	Seat ring	ASTM A105 + ENP	ASTM A182 304	ASTM A182 316	ASTM A182 304L	ASTM A182 316L
	6	Ball	PTFE/NYLON/PEEK/PFL	PTFE/NYLON/PEEK/PFL	PTFE/NYLON/PEEK/PFL	PTFE/NYLON/PEEK/PFL	PTFE/NYLON/PEEK/PFL
	7	Seat	ASTM A105 + ENP	ASTM A182 304	ASTM A182 316	ASTM A182 304L	ASTM A182 316L
	8	Stud	A193 B7M	A320 B8	A320 B8	A320 B8	A320 B8M
	9	Anti-fire gasket	SST + Graphite	SST + Graphite	SST + Graphite	SST + Graphite	SST + Graphite
	10	Bonnet	ASTM A105	ASTM A182 304	ASTM A182 316	ASTM A182 304L	ASTM A182 316L
	11	Check valve	Combined parts	Combined parts	Combined parts	Combined parts	Combined parts
	12	Sealant injection valve	Combined parts	Combined parts	Combined parts	Combined parts	Combined parts
	13	Anti-static device	Combined parts	Combined parts	Combined parts	Combined parts	Combined parts
	14	Stem	ASTM A182 F6a	ASTM A182 304	ASTM A182 316	ASTM A182 304L	ASTM A182 316L
	15	Sliding bearing	Metal + PTFE	Metal + PTFE	Metal + PTFE	Metal + PTFE	Metal + PTFE
	16	Thrust bearing	PTFE	PTFE	PTFE	PTFE	PTFE
	17	O Ring	VITON	VITON	VITON	VITON	VITON
	18	O Ring	VITON	VITON	VITON	VITON	VITON
	19	Anti-fire gasket	SST + Graphite	SST + Graphite	SST + Graphite	SST + Graphite	SST + Graphite
	20	Seal gland	ASTM A105 + ENP	ASTM A182 304	ASTM A182 316	ASTM A182 304L	ASTM A182 316L
	21	Socket head cap screw	A193 B7M	A320 B8	A320 B8	A320 B8	A320 B8M
	22	Pin	ANSI 1035	ANSI 1035	ANSI 1035	ANSI 1035	ANSI 1035
	23	Packing	Graphite	Graphite	Graphite	Graphite	Graphite
	24	Packing gland	ASTM A216 WCB	ASTM A216 WCB	ASTM A216 WCB	ASTM A216 WCB	ASTM A216 WCB
	25	Hexagon bolt	A193 B7M	A320 B8	A320 B8	A320 B8	A320 B8M
	26	Stopper	A3 • HZn	A3 • HZn	A3 • HZn	A3 • HZn	A3 • HZn
	27	Retaining ring	65Mn	65Mn	65Mn	65Mn	65Mn
	28	Sealant injection valve	Combined parts	Combined parts	Combined parts	Combined parts	Combined parts
	29	Sealant injection valve	Combined parts	Combined parts	Combined parts	Combined parts	Combined parts
	30	Check valve	Combined parts	Combined parts	Combined parts	Combined parts	Combined parts
	31	Sealant injection valve	Combined parts	Combined parts	Combined parts	Combined parts	Combined parts
	32	Drainage valve	Combined parts	Combined parts	Combined parts	Combined parts	Combined parts
	33	Drainage valve	Combined parts	Combined parts	Combined parts	Combined parts	Combined parts
	34	Thrust bearing	PTFE	PTFE	PTFE	PTFE	PTFE
	35	Sliding bearing	Metal + PTFE	Metal + PTFE	Metal + PTFE	Metal + PTFE	Metal + PTFE
	36	O Ring	VITON	VITON	VITON	VITON	VITON
	37	Anti-fire gasket	SST + Graphite	SST + Graphite	SST + Graphite	SST + Graphite	SST + Graphite
	38	Lower cover	ASTM A105 + ENP	ASTM A182 304	ASTM A182 316	ASTM A182 304L	ASTM A182 316L
	39	Stud	A193 B7M	A320 B8	A320 B8	A320 B8	A320 B8M
	40	Hexagon nut	A194 2HM	A194-8	A194-8	A194-8	A194-8M
	41	Hexagon nut	A194 2HM	A194-8	A194-8	A194-8	A194-8M
		Applicable media	Water, steam, gas, oil, liquid		N/A	Strong Oxidizer	Urea
		Applicable temperature	N/A	≤207℃(PTFE)、≤80℃(NYLON)、≤250℃(PEEK)、≤250℃(PPL)
		Design and manufacturing	API 608、AP1 6D
		Face-to-face dimensions	ASME B16.10、AP1 6D
		Type of connection	Flange		ASME B16.5/ASME B16.47	Butt welding	ASME B16.25
		Pressure test	API 598、AP1 6D
		Transmission mode	Manual, worm and worm gear transmission, pneumatic, electric

Your questions answered

Common questions

How can you trust SFANVALVE ?

For Sfanvalve’s standard products, we are willing to start production without any payment in advance. We accept product inspection upon completion, and payment is only due once the inspection is passed. SFAN will then arrange shipment to your designated warehouse as per your requirements.

If we purchase from you, will you manufacture according to our requirements ?

Yes. After receiving the contract, we will provide technical drawings. Production will commence based on these drawings once they are confirmed by both parties.

Will "SFANVALVE" deliver on time ?

After receiving the contract and confirming the drawings, we will provide a production schedule and manufacture strictly according to it. We will provide photos or videos to share and make a record for every stage of the production process. If a serious delay occurs due to management error, we will arrange air shipment and bear all costs by air.”

What is the warranty terms ？

The warranty period is 18 months from the date of shipment or 12 months from the date of installation, whichever occurs first.