Parallel Double Gate Valve

Material:Carbon Steel (WCB, WCC for strength), Stainless Steel (SS304, SS316 for corrosion resistance), Cast Iron

Size Range:DN15-DN900

Connection Options:Flanged

Working Pressure:Class 150 to Class 2500

Working Temperature:-46°C to 600°C

Sealing Options:Metal-to-Metal, Resilient Seat, Graphite, PTFE

Manufacturing Method:Cast, Forged

Applicable Medium: Water, steam, oil, gas, etc

Manufacturing Standard:API 600

Product Overview

Parallel double gate valve acts reliably and is suitable for emergency cut-off or discharge of gas and liquid medium transmission pipelines. It can be used for safe and reliable operation under high temperature, high pressure, explosion-proof, anti-corrosion and other environmental conditions. It has been widely used in petroleum, chemical, electric power, metallurgy, light textile, oil depot, military and other departments. After years of production and research, the company has continuously improved its structure and performance, and the continuous integration of new technologies has improved the quality and performance of the product.

Product Features

Corrosion-Resistant Material: Made from stainless steel (e.g., CF8/304 or CF8M/316), providing excellent resistance to rust and chemical corrosion.
Secure Flanged Connection: Flanged ends allow for easy installation and maintenance, ensuring a strong and leak-proof connection.
Full Bore Design: Allows for unrestricted flow, reducing pressure drop and increasing efficiency.
Rising Stem Option: Provides visual indication of valve position (open or closed).
High Temperature and Pressure Tolerance: Engineered to withstand demanding conditions without compromising performance.

Specification Parameters

Standard specification

Standard	Design and Manufacturing	Face to Face	Flange Dimensions	Pressure Temperature Class	Test and Inspection
National and Industrial Standards	GB/T 12234	GB/T 12221	GB/T 9113, HG/T 20592, HG/T 20615, JB/T79	GB/T 12224	GB/T 26480
USA Standards	API 600	ASME B16.10	ASME B16.5, ASME B16.47	ASME B16.34	API 598

Notes: 1.According to the user’s needs, flange connection dimensions can also be provided according to SH/T 3406 and other standards. 2.The inspection and test can also be conducted according to GB/T 13927 or API 6D according to the user’s requirements.

Main performance parameters

Single passreference airconsumption ofpneumatic valvecylinder	DN (mm)	<50	65~80	100	125	150	200	250	300
	Air Consumption (m³)	0.003	0.008	0.012	0.023	0.027	0.078	0.096	0.165
	DN (mm)	350	400	450	500	600	700	800	900
	Air Consumption (m³)	0.185	0.261	0.292	0.505	0.869	1.051	1.568	1.809
Applicable Media		Water, steam, oil, gas, etc
Applicable Medium Temperature (°C)		Low temperature: -46~345, Moderate temperature: -29~425, High temperature: 450~600
Air Supply Pressure of Cylinder (MPa)		0.3~0.7
Full Stroke Cut-Off Time of Valve Switch (s)		DN15~32		DN40~100	DN125~200	DN250~400		DN450~600	DN700~900
		<2		<4	<8	<16		<26	<40
Valve Leakage Level		According to GB/T 4213, FCI 70-2 (ASME B16.104), leakage level is Class V
Air Supply Interface Size (mm)		≤DN100		DN150~DN200		DN250~DN400			≥DN100
		NPT1/4~Φ8		NPT1/4NPT3/8Φ8		NPT3/8NPT1/2Φ10/Φ12			NPT1/2~Φ16

Notes: 1.The full stroke cut-off time of valve switch in the table is calculated according to the valve pressure PN1.6MPa. 2.m³ is the cubic number converted to the standard state, and the air supply pressure of the cylinder is calculated as 0.4 MPa. 3.The full stroke cut-off time of valve switch is only for reference and can also be adjusted according to user requirements. 4.Valve leakage class VI is a special order.

Boundary Connection Dimensions of Parallel Double Gate Valve:

PN (MPa)	DN	Overall dimensions						Connection size				Sealing surface		Reference Weight (kg)
PN (MPa)	DN	L (3/Short)	L (1/15Long)	H	H1	L1	D0	D	K	n-d	C	D1	f	Reference Weight (kg)
1.6	15	108	130	472	380	185	250	95	65	4-14	16	45	2	27
	20	117	150	485	390	185	250	105	75	4-14	18	58	2	30
	25	127	160	490	400	185	250	115	85	4-14	18	68	2	32
	32	140	180	530	414	185	250	140	100	4-18	18	78	2	35
	40	165	240	600	430	185	250	150	110	4-18	20	88	2	42
	50	178	250	729	488	185	250	165	125	4-18	20	102	2	57
	65	190	270	802	550	185	250	185	145	8-18	22	122	2	68
	80	203	280	891	604	185	250	200	160	8-18	20	138	2	80
	100	229	300	1051	710	185	250	220	180	8-18	20	158	2	100
	125	254	325	1283	740	185	250	250	210	8-22	22	188	2	125
	150	267	350	1385	925	185	250	285	240	8-22	22	212	2	155
	200	292	400	1700	1119	258	350	340	295	12-22	24	268	2	265
	250	330	450	1904	1226	258	350	405	355	12-26	26	320	2	350
	300	356	500	2245	1438	258	350	460	410	12-26	28	378	2	470
	350	381	550	2620	1640	290	400	520	470	16-26	30	428	2	640
	400	406	600	2715	1400*	290	400	580	525	16-30	32	490	2	840
	450	432	650	2840	1550*	445	650	640	585	20-30	40	550	2	1200
	500	457	700	3220	1700*	445	650	715	650	20-33	44	610	2	1380
	600	508	800	3750	1900*	480	650	840	770	20-36	54	725	2	1620
	700	610	900	4365	2280*	480	650	910	840	24-36	42	795	2	2780
	800	711	1000	4890	2504*	525	900	1025	950	24-39	42	900	2	4215
	900	711	1100	5305	2725*	530	900	1125	1050	28-39	44	1000	2	4850
PN (MPa)	DN	Overall dimensions						Connection size				Sealing surface		Reference Weight (kg)
PN (MPa)	DN	L (3/Short)	L (1/15Long)	H	H1	L1	D0	D	K	n-d	C	D1	f	Reference Weight (kg)
2.5	15	108	130	472	380	185	250	95	65	4-14	16	45	2	27
	20	117	150	485	390	185	250	105	75	4-14	18	58	2	30
	25	127	160	490	400	185	250	115	85	4-14	18	68	2	32
	32	140	180	530	414	185	250	140	100	4-18	18	78	2	35
	40	165	240	600	430	185	250	150	110	4-18	18	88	2	42
	50	178	250	729	488	185	250	165	125	4-18	20	102	2	57
	65	190	270	802	550	185	250	185	145	8-18	22	122	2	77
	80	203	280	891	604	185	250	200	160	8-18	24	138	2	84
	100	229	300	1051	710	185	250	235	190	8-22	24	162	2	105
	125	254	325	1283	740	185	250	270	220	8-26	26	188	2	130
	150	267	350	1385	925	185	250	300	250	8-26	28	218	2	160
	200	292	400	1700	1119	258	350	360	310	12-26	30	278	2	282
	250	330	450	1904	1226	258	350	425	370	12-30	32	335	2	377
	300	356	500	2089	1066*	290	400	485	430	12-30	34	395	2	475
	350	381	550	2235	1213*	290	400	555	490	16-33	38	450	2	660
	400	406	600	2715	1400*	290	400	620	550	16-36	40	505	2	920
	450	432	650	2840	1550*	445	650	670	600	20-36	46	555	2	1212
	500	457	700	3220	1700*	445	650	730	660	20-36	48	615	2	1400
	600	508	800	3775	1900*	480	650	845	770	20-39	58	720	2	1632
	700	610	900	4365	2280*	480	650	960	875	24-42	50	820	2	2780
	800	711	1000	4890	2504*	525	900	1025	950	24-48	54	930	2	4215
	900	711	1100	5305	2725*	530	900	1125	1090	28-48	58	1030	2	4850

Boundary Connection Dimensions of Parallel Double Gate Valve 4.0PN

PN	DN	Overall dimensions						Connection size				Sealing surface				Reference Weight (kg)
PN	DN	L (4/Short)	L (1/22Long)	H	H1	L1	D0	D	K	n-d	C	D1	f	D2	f1	Reference Weight (kg)
4	20	152	152	500	398	185	250	105	75	4-14	18	58	2	51	4	32
	25	165	165	510	410	185	250	115	85	4-14	18	68	2	58	4	34
	32	178	178	540	420	185	250	140	100	4-18	18	78	2	66	4	38
	40	190	240	613	442	185	250	150	110	4-18	18	88	2	76	4	55
	50	216	250	748	503	185	250	165	125	4-18	20	102	2	88	4	69
	65	241	280	860	573	185	250	185	145	8-18	22	122	2	110	4	80
	80	283	310	1014	706	185	250	200	160	8-18	24	138	2	121	4	88
	100	305	350	1170	810	185	250	235	190	8-22	24	162	2	150	4.5	110
	125	381	400	1306	888	185	250	270	220	8-26	26	188	2	176	4.5	135
	150	403	450	1417	954	258	350	300	250	8-26	28	218	2	204	4.5	165
	200	419	550	1789	1192	258	350	375	320	12-30	34	285	2	260	4.5	345
	250	457	650	1987	1289	258	350	450	385	12-33	38	345	2	313	4.5	450
	300	502	750	2116	1073*	290	400	515	450	16-33	42	410	2	364	4.5	620
	350	762	850	2353	1227*	290	400	580	510	16-36	46	465	2	422	5	680
	400	838	950	2715	1400*	290	400	660	585	18-39	50	535	2	474	5	1000
	450	914	1050	3010	1645*	445	650	685	610	20-39	57	560	2	524	5	1320
	500	991	1150	3235	1725*	445	650	755	670	20-42	57	615	2	576	5	1812
	600	1143	1350	3749	1947*	480	650	890	795	20-48	72	735	2	676	6	2300

Note: The mark with “*” in the table is the central double-acting pneumatic parallel double gate valve. The data in the above table is for reference only, please call the Technical Department for the actual working conditions, and hereby declare!

Specification Applications

Power generation steam and feedwater systems
Oil and gas transmission and isolation pipelines
High-temperature and high-pressure industrial services
Chemical and petrochemical process lines
Water supply and large-diameter pipeline systems
Power stations and boiler outlets requiring tight shut-off

Valve Actuation

Process Optimization

Precision Engineering

Pipeline Solutions

Industrial Valves

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