Trunnion Ball Valve

Design and manufacturing: GB/T 12237
The structural length: GB/T12221
Connection forms: HG/T20592-20605 GB/T9112-9124
Inspection and test: GB/T13927
Caliber: DN50~DN1500 2″~60″
Pressure temperature level: GB/T12224
Drive mode: Manual, worm gear, pneumatic, electric
Pressure: PN1.6MPa~PN42.0MPa Class150~Class2500

Product Overview

The trunnion ball valve is a robust and reliable valve designed for high-pressure and high-flow applications. Featuring a trunnion-mounted ball for added stability, it ensures precise flow control and minimal operating torque. Its durable construction, often using materials like stainless or carbon steel, makes it ideal for demanding industries such as oil and gas, chemical processing, and power generation. With superior sealing performance, low maintenance needs, and compatibility with a range of pressures and temperatures, the trunnion ball valve is a trusted choice for critical fluid control systems.

Product Features

Floating ball, full bore or reduce bore.
ISO5211 mounting pad for option.
Blow-out proof stem design.
PTFE/RPTFE seat seal( Seat seal material could be decided by customer’s request or according to valve’s medium & temp. condition).
Anti-static design and API 607 Fire Safe Design available
Operation: Hand wheel, Worm wheel, Pneumatic actuator & Electric Actuator.

1.Operation and Actuation

Trunnion Ball Valves are supplied with an extended lever for smooth and easy manual operation. For higher torque or automated systems, valves can be equipped with gear operators, electric actuators, pneumatic actuators, or hydraulic actuators, making them suitable for severe and remote service applications.

2.Body and Bonnet Construction

For sizes 12 inches and below, split or three-piece body and bonnet designs are available. This structure allows easy disassembly for inspection, maintenance, or replacement of internal components, reducing downtime and maintenance costs.

3.Bore Design

Available in full bore or reduced bore configurations. The full-bore design minimises pressure drop and provides excellent flow capacity, making it ideal for pipeline and process control applications.

4.End Connection Types

This valves can be supplied with flanged, RTJ flanged, or butt-welded end connections, offering flexibility for different piping systems and installation standards.

5.Packing System

The standard packing system uses multiple V-type PTFE packing combined with live loading, ensuring consistent sealing under high-cycle and severe service conditions. For high-temperature applications, graphite packing is available.

6.Anti-Static Design

An anti-static device ensures continuous metallic contact between the ball, stem, and body, safely discharging static electricity generated during valve operation.

7.Double Block and Bleed (DBB)

The double block and bleed design isolates the valve body cavity when the valve is either fully open or fully closed. Any trapped pressure in the cavity can be safely released, preventing over-pressurisation and improving operational safety.

8.Fire-Safe Construction

Fire-safe valves are designed in accordance with API 607 or BS 6755 standards to maintain sealing integrity during and after fire exposure. A secondary metal-to-metal sealing system acts as backup if soft seals fail. Valves supplied to API 607 requirements are fitted with graphite packing and gaskets.

Specification Parameters

◇Implementation of standards

1、Design and manufacture: GB/T 12237-1989;API 608
2、Inspection and test:GB/T 13927-1992;API 598
3、Flange connection: JB/T 79.1~2-1994;ASME/ANSI B 16.5
4、Structure length:GB/T 12221-1989;ASME/ANSI B 16.10

◇ Performance Specifications

Nominal Pressure	Max. Working Pressure	Case Test Pressure	Gas Seals Test Pressure	High-pressure Sealing Test Pressure
PN 1.6	1.6	2.4	0.6	1.76
PN 2.5	2.5	3.8	0.6	2.75
PN 4.0	4.0	6.0	0.6	4.4
PN 6.4	6.4	9.6	0.6	7.1
Class 150	2.0	3.0	0.6	2.2
Class 300	5.0	7.5	0.6	5.5

◇ Terms of Use

Shell Material	Seat Material	Applicable Temperature	Applicable Media
Carbon Steel C	PTFE	≤150 °C	Water, steam, oil, etc.
Carbon Steel C	Counterpoint polystyrene	≤250 °C	Water, steam, oil, etc.
Chrome-nickel-titanium steel	PTFE	≤150 °C	Nitric acid
Chrome-nickel-titanium steel	Counterpoint polystyrene	≤200 °C	Nitric acid
Chrome-nickel steel R-Mo-Ti	PTFE	≤150 °C	Acetic acid
Chrome-nickel steel R-Mo-Ti	Counterpoint polystyrene	≤200 °C	Acetic acid

◇ Main Components Material

Component	Standard	WCB	ZG1Cr18Ni9Ti	ZG1Cr18Ni12Mo2Ti
Body / Bonnet	GB	WCB	ZG1Cr18Ni9Ti	ZG1Cr18Ni12Mo2Ti
Body / Bonnet	ASTM	WCB	CF8	CF8M
Ball	GB	2Cr13	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
Ball	ASTM	420	304	316
Stem	GB	2Cr13	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
Stem	ASTM	420	304	316
Seat	GB	2Cr13 / PTFE	1Cr18Ni9Ti / PTFE	1Cr18Ni12Mo2Ti / PTFE
Seat	ASTM	420 / PTFE	304 / PTFE	316 / PTFE
Packing	GB	PTFE	PTFE	PTFE
Packing	ASTM	PTFE	PTFE	PTFE
Bolt	GB	35CrMo	0Cr18Ni9	0Cr18Ni9
Bolt	ASTM	A193 B7	A320-B8	A320-B8
Nut	GB	45	0Cr18Ni9	0Cr18Ni9
Nut	ASTM	A194 2H	A190-8	A194-8

◇ Main Connection Dimensions (size:mm)

Nominal Pressure(PN)	DN	L	D	K	d	Y	b	z–d0	Ws	Hs	Hw	Hd
1.6 MPa	150	394	285	240	210	–	24	8–23	1000	305	470	540
	200	457	340	295	265	–	26	12–23	–	–	520	580
	250	533	405	355	320	–	30	12–25	–	–	610	640
	300	610	460	410	375	–	30	12–25	–	–	650	690
	350	686	520	470	435	–	34	16–25	–	–	740	785
	400	762	580	525	485	–	36	16–30	–	–	795	830
	450	864	640	585	545	–	40	20–30	–	–	860	910
	500	914	715	650	608	–	44	20–34	–	–	945	990
	600	1067	840	770	718	–	48	20–41	–	–	1040	1090
	700	1245	910	840	788	–	50	24–41	–	–	1150	1210
	800	1372	1025	950	898	–	52	24–41	–	–	1280	1340
	900	1524	1125	1050	998	–	54	28–41	–	–	1430	1510
	1000	1753	1255	1170	1110	–	56	28–48	–	–	1580	1640
	1200	2032	1485	1390	1325	–	58	32–54	–	–	1810	1910
	1400	2300	1685	1590	1525	–	60	36–54	–	–	2010	2115
2.5 MPa	150	403	300	250	218	–	30	8–25	1000	305	470	555
	200	502	360	310	278	–	34	12–25	–	–	540	595
	250	568	425	370	332	–	36	12–30	–	–	630	655
	300	648	485	430	390	–	40	16–30	–	–	650	705
	350	762	555	490	448	–	44	16–34	–	–	740	795
	400	838	620	550	505	–	48	16–34	–	–	795	830
	450	914	670	600	555	–	50	20–34	–	–	860	910
	500	991	730	660	610	–	52	20–41	–	–	945	990
	600	1143	845	770	718	–	56	20–41	–	–	1040	1090
	700	1346	960	875	815	–	60	24–48	–	–	1150	1210
	800	1524	1085	990	930	–	64	24–48	–	–	1305	1340
	900	1727	1185	1090	1025	–	66	28–54	–	–	1505	1600
	1000	1880	1320	1210	1140	–	68	28–58	–	–	1615	1705
	1200	2184	1520	1420	1350	–	72	32–58	–	–	1925	2035
	1400	2300	1755	1640	1560	–	78	36–65	–	–	2110	2185

PN (MPa)	DN (mm)	L	D	K	d	Y	b	z–d0	Ws	Hs	Hw	Hd
4.0 MPa	150	403	300	250	218	204	30	8–25	1200	360	485	590
	200	502	375	320	282	260	38	12–30	–	–	580	640
	250	568	450	385	345	313	42	12–34	–	–	665	680
	300	648	515	450	408	364	46	16–34	–	–	760	810
	350	762	580	510	465	422	52	16–34	–	–	820	890
	400	838	660	585	535	474	58	16–41	–	–	860	940
	450	914	685	610	560	524	60	20–41	–	–	930	1010
	500	991	755	670	612	576	62	20–48	–	–	980	1130
	600	1143	890	795	730	678	62	20–54	–	–	1040	1090
	700	1346	995	900	835	768	68	24–54	–	–	1150	1210
	800	1524	1140	1030	960	876	76	24–58	–	–	1305	1340
	900	1727	1270	1168	1022	–	105	32–54	–	–	1505	1600
	1000	1880	1238	1156	1086	–	114	32–44	–	–	1615	1705
	1200	2184	1467	1372	1302	–	133	32–51	–	–	1925	2035
	1400	–	1708	1600	1518	–	154	28–60	–	–	2110	2185
6.4 MPa	150	495	345	280	240	204	38	8–34	1200	360	485	590
	200	597	405	345	300	260	44	12–34	–	–	580	650
	250	673	470	400	352	313	48	12–41	–	–	665	720
	300	762	530	460	412	364	54	16–41	–	–	760	840
	350	826	600	525	475	422	60	16–41	–	–	820	930
	400	902	670	585	525	474	66	16–48	–	–	870	990
	500	1054	800	705	640	576	70	20–54	–	–	995	1150
	600	1232	930	820	750	678	76	20–58	–	–	1100	1180
	700	1397	1035	940	800	–	95	28–51	–	–	1180	1230
	800	1651	1149	1054	914	–	108	28–54	–	–	1345	1385
	900	1880	1270	1168	1022	–	114	32–54	–	–	1550	1655
	1000	1981	1270	1175	1092	–	133	32–51	–	–	1675	1745
	1200	2311	1511	1403	1308	–	152	28–60	–	–	1945	2075

Class	DN (in)	L	D	K	d	Y	b	z–d0	Ws	Hs	Hw	Hd
Class 150	2″	178	152	120.5	92	–	16	4–19	260	155	–	–
	2½”	190	178	139.5	105	–	18	4–19	350	185	–	–
	3″	203	190	152.5	127	–	19	4–19	500	205	–	–
	4″	229	229	190.5	157	–	24	8–19	650	256	390	500
	5″	356	254	216	186	–	24	8–22	800	285	410	520
	6″	394	279	241.5	216	–	26	8–22	1000	305	470	540
	8″	457	343	298.5	270	–	29	8–22	–	–	520	580
	10″	533	406	362	324	–	31	12–25	–	–	610	640
	12″	610	483	432	381	–	32	12–25	–	–	650	690
	14″	686	533	476	413	–	35	12–29	–	–	740	785
	16″	762	597	540	470	–	37	16–29	–	–	795	830
	18″	864	635	578	533	–	40	16–32	–	–	860	910
	20″	914	699	635	584	–	43	20–32	–	–	945	990
	24″	1067	813	749.5	692	–	48	20–35	–	–	1040	1090
	28″	1245	927	864	800	–	71	28–35	–	–	1150	1210
	32″	1372	1060	978	914	–	81	28–41	–	–	1280	1340
Class 300	2″	216	165	127	92	–	23	8–19	260	155	–	–
	2½”	241	190	149	105	–	26	8–22	350	185	–	–
	3″	283	210	168.5	127	–	29	8–22	500	205	–	–
	4″	305	254	200	157	–	32	8–22	800	270	410	530
	5″	381	279	235	186	–	35	8–22	1000	305	470	560
	6″	403	318	270	216	–	37	12–22	1200	340	485	590
	8″	502	381	330	270	–	42	12–25	–	–	580	640
	10″	568	445	387.5	324	–	48	16–29	–	–	665	680
	12″	648	521	451	381	–	51	16–32	–	–	760	810
	14″	762	584	514.5	413	–	54	20–32	–	–	820	890
	16″	838	648	571.5	470	–	58	20–35	–	–	860	940
	18″	914	711	628.5	533	–	61	24–35	–	–	930	1010
	20″	991	775	686	584	–	64	24–35	–	–	980	1130
Class 600	2″	292	165	127	108	82.560	26	8–19	350	175	–	–
	2½”	330	190	149	127	101.600	29	8–22	500	200	–	–
	3″	356	210	168	146	123.825	32	8–22	650	235	–	–
	4″	432	273	216	175	149.225	38	8–25	1000	275	395	550
	5″	508	330	266.5	210	180.975	45	8–29	1200	325	430	580
	6″	559	356	292	241	211.138	48	12–29	–	–	495	620
	8″	660	419	349	302	269.876	56	12–32	–	–	595	680
	10″	787	508	432	356	323.851	64	16–35	–	–	680	740
	12″	838	559	489	413	381.001	67	20–35	–	–	790	850

Specification Applications

Oil & Gas Pipelines – Mainline isolation for high-pressure crude oil, natural gas, and refined product pipelines.
Upstream & Midstream Facilities – Wellheads, manifolds, and compressor stations requiring low operating torque and reliable shut-off.
Petrochemical & Refining Plants – High-pressure and high-temperature process lines.
LNG & Gas Processing – Gas isolation in high-pressure and low-temperature applications.
Offshore & Power Generation – Critical isolation in offshore platforms and power plant systems.

Valve Actuation

Process Optimization

Precision Engineering

Pipeline Solutions

Industrial Valves

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