What is a gas ball valve - Knowledge - GNEE Multinational Trade

The gas ball valve (model Q41F) is an on/off control valve used in gas systems. It is suitable for conveying media such as liquefied petroleum gas and natural gas, and has an operating temperature range of -40℃ to +80℃. Its nominal diameter is DN15-150mm, rated pressure is 1.6-4.0MPa, and the valve body is made of cast iron, cast steel, or stainless steel, conforming to national standards such as GB/T12237-89.

This valve achieves bidirectional flow of media through a rotating ball with a circular channel, offering rapid opening and closing, easy operation, and low fluid resistance. Its simple and compact structure, small size, light weight, and easy maintenance make it suitable for various structural types, including floating, fixed, and flexible types, as well as threaded, flanged, and welded connections.

Special designs include a long-neck bonnet to prevent cold energy loss, a spring-loaded static discharge device to ensure anti-static resistance (Ω), and a fire-resistant structure that meets AP1 6FA fire resistance standards. Sufficient space must be provided for valve handle rotation during installation, and belt-driven mechanisms must be installed vertically.

Made of non-metallic PA12 material, this ball valve is suitable for sub-high pressure environments up to 1.8MPa, is ISO16486-4 certified, and is applicable to trenchless construction scenarios such as horizontal directional drilling. It operates without vibration and with low noise.

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gas ball valve Main dimensions

Nominal diameter	Standard value								Reference value				Weight (kg)
	L		D	D1	D2	b	f	Z-Φd	H1	H2	H3	H4	Weight (kg)
	Flange	Butt Welded	D	D1	D2	b	f	Z-Φd	H1	H2	H3	H4	Q47F	Q347F
mm	PN1.0(Mpa)
15	108	165	95	65	46	14	2	4-Φ14	145	-	210	346	4.5	-
20	117	190	105	75	56	16	2	4-Φ14	152		220	352	5.5
25	127	216	115	85	65	16	2	4-Φ14	162		235	364	7
32	140	229	140	100	76	18	2	4-Φ18	175		255	382	11.5
40	165	241	150	110	84	18	2	4-Φ18	188		280	406	17
50	178	292	165	125	99	20	2	4-Φ18	205	228	308	430	22	31
65	190	330	185	145	118	20	2	4-Φ18	222	248	340	460	28	39
80	203	356	200	160	132	20	2	8-Φ18	242	270	380	494	41	52
100	229	432	220	180	156	22	2	8-Φ18	265	294	430	538	48	71
125	346	508	250	210	184	22	2	8-Φ18	-	322	490	588	-	103
150	394	559	285	240	211	24	2	8-Φ23		358	560	644		180
200	457	660	340	295	286	24	2	8-Φ23		406	640	704		290
250	533	787	395	350	319	26	2	12-Φ23		468	730	766		400
300	610	838	445	400	370	26	2	12-Φ23		538	830	830		540
350	686	889	505	460	429	26	2	16-Φ23		610	940	922		734
400	762	991	565	515	480	26	2	16-Φ26		682	1060	1020		1005
450	864	1092	615	565	530	28	2	20-Φ26		755	1180	1114		1372
500	914	1194	670	620	582	28	2	20-Φ26		832	1300	1204		1880
600	1450	1394	780	725	682	34	2	20-Φ30		922	1420	1290		2648
700	1650	1549	895	840	794	34	2	24-Φ30		1015	1540	1375		3828
800	1850	1778	1015	950	901	36	2	24-Φ34		1110	1650	1448		5462

gas ball valve Features

1. Simple Structure: The structure of a gas ball valve is relatively simple, mainly composed of a valve body, ball, stem, and seat. This results in lower manufacturing costs and easier installation and maintenance.

2. Good Sealing Performance: The natural gas ball valve adopts a metal hard seal structure, providing excellent sealing performance. When the valve is closed, the large contact area between the ball and seat effectively prevents natural gas leakage.

3. Flexible Operation: The opening, closing, and adjustment of the natural gas ball valve can be achieved by rotating the ball, offering highly flexible operation. Furthermore, the low friction between the ball and seat allows for rapid opening and closing, facilitating quick regulation of natural gas flow.

4. Long Service Life: The ball and seat of the natural gas ball valve are made of wear-resistant materials, possessing high hardness and wear resistance. Under normal operating conditions, the service life of the natural gas ball valve is long, generally reaching several decades.

5. Wide Applicability: Natural gas ball valves are suitable for natural gas media of various pressures and temperatures, and can meet the control requirements of natural gas flow under different operating conditions.

6. High Safety: Natural gas ball valves have an automatic pressure relief function. When the pressure in the pipeline exceeds the set value, the valve will automatically open to release some natural gas, thereby reducing the pressure in the pipeline and ensuring the safe operation of the pipeline system.

gas ball valve Applications

Household Gas Systems

Installed after the gas meter and before the gas stove, used to control gas supply.

Example: Main or branch switch for kitchen gas pipelines.

Industrial Gas Equipment

Used for gas control in equipment such as gas boilers, gas generators, and gas-fired furnaces.

Example: Branch control valves for factory gas pipelines.

Gas Transmission Pipelines

Installed on main or branch gas pipelines for maintenance or emergency shut-off.

Example: Section control valves for city gas pipelines.

gas ball valve factory

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