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Fully Welded Ball Valve

Size: DN10 ~ DN1200
The structural length:GB/T 12221
Connection Forms: Fully Welded
Pressure: PN16, PN25, PN40, Class 150, 300
Suitable temperature :-29-150°CInspection and test:GB/T 13927
Suitable medium: Natural gas, Petroleum

Product Overview

A full welded ball valve is a high-integrity, maintenance-free shut-off valve designed for buried or long-term pipeline service. With a fully welded body and zero external leakage paths, it delivers excellent sealing performance, high pressure resistance, and long service life. Widely used in natural gas, district heating, oil & gas, and water transmission pipelines, full welded ball valves are ideal for applications where safety, durability, and minimal maintenance are critical.

Product Features

Fully welded body design eliminates external leakage risk
Maintenance-free structure, ideal for buried and underground pipelines
Excellent sealing performance with low operating torque
High pressure and temperature resistance for long-term service
Widely used in natural gas, district heating, oil & gas, and water pipelines

Specification Parameters

Main Parts Material List:

No.	Part Name	Material Type	Material Grade	No.	Part Name	Material Type	Material Grade
1	Body	Carbon Steel	ST37.8	7	Support	Stainless Steel	—
2	Stem Chamber	Carbon Steel	Fe52DP	8	Screw	Steel	—
3	Ball	Stainless Steel	AISI 304	9	O-Sealing Ring	Synthetic Rubber	FPM
4	Stem	Stainless Steel	AISI 303	10	Gasket	Teflon	PTFE
5	Seal Ring	Teflon	PTFE	11	Floor Clip	Cast Steel	AISI 304
6	Bevel Washer	Spring Steel	—	12	Handle	Galvanized Steel	—

Full Diameter / Welding – Main Dimensions

DN	PN	L	D	D1	D2	A	H	B	H1
10	16	210	15	21.7	42.7	129	103	64	22
15	16	230	20	27.2	48	159	118	76	23
20	16	260	25	34.0	60	159	121	85	34
25	25	260	32	42.7	76	230	120	95	33
32	25	300	40	48.6	89	230	127	100	43
40	40	300	50	60.5	114	300	170	159	44
50	40	300	65	76.3	140	300	185	170	71
65	40	300	80	89.1	165	400	210	192	77
80	40	325	100	114.3	216	400	253	208	102
100	40	350	125	139.8	219	450	273	241	101
125	40	490	150	165.2	355	450	300	280	107
150	40	580	200	216.3	356	252	325	500	123
200	40	550	250	267.4	457	236	345	500	122
250	16	630	300	318.5	508	331	465	600	155
300	16	762	337	355.6	559	331	530	600	187
400	25	840	387	406.4	660	360	550	700	221
500	25	990	490	508.0	830	413	630	800	211
600	25	1140	590	610	982	506	830	—	—
700	25	1346	690	711	1086	605	910	—	—
800	25	1524	790	813	1245	659	1025	—	—
900	25	1727	890	914	1433	881	1165	—	—
1000	25	1950	980	1016	1576	1092	1170	—	—
1200	25	2250	1180	1219	1939	1092	1180	—	—

Shrinkage / Flange – Main Dimensions

DN	PN	L	D	D1	D2	D3	H	B	H1
10	16	130	10	95	65	14	98	145	22
15	16	150	15	105	75	14	103	145	23
20	16	160	20	115	85	14	118	145	34
25	25	180	25	140	100	18	121	145	33
32	40	200	32	150	110	18	121	190	43
40	40	230	40	165	125	18	127	190	44
50	40	270	50	185	145	18	170	280	71
65	40	280	65	200	160	18	185	280	77
80	40	300	80	235	190	22	210	280	102
100	40	325	100	270	220	26	253	400	101
125	40	350	125	300	250	26	273	600	107
150	40	400	150	360	310	26	300	900	123
200	40	530	200	425	370	30	345	1200	122
250	16	630	250	485	430	30	572	280	155
300	16	690	300	555	490	33	697	325	187
400	25	762	350	620	550	36	764	466	221

Shrinkage / Screw & Welding – Main Dimensions

DN	PN	L	D	D1	D2	D3	H	B	H1
10	16	153	10	R3/8	33.7	17.2	98	145	22
15	16	158	10	R1/2	33.7	21.3	98	145	22
20	16	168	15	R3/4	42.4	26.9	103	145	23
25	25	172	20	R1	48.3	33.7	118	145	34
32	40	195	25	R1-1/4	60.3	42.4	121	145	33
40	40	205	32	R1-1/2	76.1	48.3	120	190	33
50	40	240	40	R2	88.9	60.3	127	190	44

Specification Applications

Natural gas transmission and distribution pipelines
District heating and cooling systems
Oil and gas pipeline isolation and shut-off
Underground and buried pipeline installations
Water supply and long-distance transmission systems

Fully Welded Ball Valve

Product Overview

Product Features

Specification Parameters

Main Parts Material List:

Full Diameter / Welding – Main Dimensions

Shrinkage / Flange – Main Dimensions

Shrinkage / Screw & Welding – Main Dimensions

Specification Applications

Features

Resources

Links

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