Pneumatic Flat Gate Valve

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

Size Range:2″ to 48″ (DN50-DN1200)

Connection Options:Flanged, Threaded (NPT, BSP), Butt Weld, Socket Weld

Working Pressure:Class 150 to Class 1500 (up to 2,500 psi / 172 bar)

Working Temperature:-29°C to 425°C

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

Manufacturing Method:Cast, Forged, Machined

Applicable Medium:Water, Oil, Gas, Steam, Chemical Fluids

Manufacturing Standard:API 600, API 602, ASME B16.34, BS 5163, DIN 3352

Product Overview

The Pneumatic Flat Gate Valve is a specialized valve designed for precise on/off control of fluids and gases in high-demand industrial applications. Equipped with a pneumatic actuator, this valve allows for automated operation, making it suitable for systems where remote or quick actuation is necessary. Its flat gate design minimizes flow resistance and pressure drop, providing efficient flow control even under high-pressure conditions.

Product Features

This valve is an enhanced design based on advanced flat plate gate valve technology. It offers significant improvements in structure, sealing reliability, and ease of maintenance.
The valve seat and damper plate undergo special precision machining. With the support of hard alloy and PTFE sealing, the valve achieves a dual-seal configuration. Optional auxiliary tail-end sealing further enhances leak prevention and extends service life.
This valve conforms to the JB/T standard series. The secondary sealing adopts a wedge-type structure to ensure tight sealing of the valve stem under the bonnet. Flange dimensions comply with JB/T79 standards, with optional thread-type connections available per customer request.
The version with a conduit (through-hole) design can accommodate pigging operations in pipelines. The version without the conduit hole is not suitable for pigging applications.
When internal pressure builds up in the valve body cavity, the seat is designed to automatically relieve excess pressure.
The valve’s transmission mechanism ensures smooth and agile operation. The required operating torque is approximately one-third to one-half of that of a conventional gate valve.
The pneumatic gate valve opens and closes rapidly, includes a buffer device, and avoids impact during operation. Its structure allows easy conversion between pneumatic and manual operation.
Operation is quick, flexible, and reliable.
The regulating version of the flat gate valve is ideal for use in pump stations, pipeline outlets, or other positions where flow control or isolation is required.
Tanggong Valve Group also manufactures special customized regulating flat gate valves based on customer needs.
For electrically operated models, Tanggong Valve Group uses reliable domestic actuators from Yangzhou Electric Power Repair Factory or Tianjin Electric, and also supports international brands such as Rotork (IQ series), AUMA (Germany, SA series), or any electric actuator specified by the customer.

Specification Parameters

◇ Main External and Connection Dimensions (JB/T79.1–1994)

PN (MPa)	DN (mm)	L	D	D1	D2	D0	f	b	H	H1	Z–φ
1.6	50	178	160	125	100	250	3	16	584	80	4–18
	65	190	180	145	120	250	3	18	634	95	4–18
	80	203	195	160	135	250	3	20	688	100	8–18
	100	229	215	180	155	300	3	20	863	114	8–18
	125	254	245	210	185	350	3	22	940	132	8–18
	150	267	280	240	210	350	3	24	1030	150	8–23
	200	292	335	295	265	350	3	26	1277	168	12–23
	250	330	405	355	320	400	3	30	1491	203	12–25
	300	356	460	410	375	450	4	30	1701	237	12–25
	350	381	520	470	435	500	4	34	1875	265	16–25
	400	406	580	525	485	305	4	36	2180	300	16–30
	450	432	640	585	545	305	4	40	2440	325	20–30
	500	457	705	650	608	305	4	44	2860	360	20–34
	600	508	840	770	718	305	5	48	3450	425	20–41
	700	610	910	840	788	305	5	50	3960	460	24–41
	800	660	1020	950	898	305	5	52	4550	512	24–41
	900	711	1120	1050	998	305	5	54	5250	565	28–41
	1000	811	1255	1170	1100	305	5	56	5870	630	28–48
2.5	50	178	160	125	100	250	3	20	584	80	4–18
	65	190	180	145	120	250	3	22	634	95	8–18
	80	203	195	160	135	250	3	22	688	100	8–18
	100	229	230	190	160	300	3	24	863	114	8–23
	125	254	270	220	188	350	3	28	940	132	8–25
	150	267	300	250	218	350	3	30	1030	150	8–25
	200	292	360	310	278	350	3	34	1277	168	12–25
	250	330	425	370	332	400	3	36	1491	203	12–30
	300	356	485	430	390	450	4	40	1701	237	16–30
	350	381	550	490	448	500	4	44	1875	265	16–34
	400	406	610	550	505	305	4	48	2180	300	16–34
	450	432	660	600	555	305	4	50	2440	325	20–34
	500	457	730	660	610	305	4	52	2860	360	20–41
	600	508	840	770	718	305	5	56	3450	425	20–41
	700	610	955	875	815	305	5	60	3960	460	24–48
	800	660	1070	990	930	305	5	64	4550	512	24–48
	900	711	1180	1090	1025	305	5	66	5250	565	28–54
	1000	811	1305	1210	1140	305	5	68	5870	660	28–58

PN (MPa)	DN (mm)	L	D	D1	D2	Y	D0	f	f2	b	H	H1	Z–φ
4.0	50	250	160	125	100	88	250	3	4	20	584	80	4–18
	65	280	180	145	120	110	250	3	4	22	634	95	8–18
	80	310	195	160	135	121	250	3	4	22	679	102	8–18
	100	350	230	190	160	150	300	3	4.5	24	863	115	8–23
	125	400	270	220	188	176	350	3	4.5	28	940	133	8–25
	150	450	300	250	218	204	350	3	4.5	30	1040	152	8–25
	200	550	375	320	282	260	350	3	4.5	38	1282	188	12–30
	250	650	445	385	345	313	400	3	4.5	42	1495	223	12–34
	300	750	510	450	408	364	450	4	4.5	46	1701	250	16–34
	350	850	570	510	465	422	500	4	5	52	1880	280	16–34
	400	950	655	585	535	474	305	4	5	58	2200	310	20–41
	450	1050	680	610	560	524	305	4	5	60	2480	335	20–41
	500	1150	755	670	612	576	305	4	5	62	2890	380	20–48
	600	1350	890	795	730	678	305	5	6	62	3460	450	20–54
	700	1450	995	900	835	768	305	5	6	68	3985	500	20–54
	800	1650	1135	1030	960	876	305	5	6	76	4750	570	24–58

PN(MPa)	DN	L	D	D1	D2	Y	D0	f	f2	b	H	H1	Z–φ
6.4	50	250	175	135	105	88	250	3	4	26	584	90	4–23
	65	280	200	160	130	110	250	3	4	28	634	105	8–23
	80	310	210	170	140	121	250	3	4	30	679	110	8–23
	100	350	250	200	168	150	300	3	4.5	32	763	130	8–25
	125	400	295	240	202	176	350	3	4.5	36	970	150	8–30
	150	450	340	280	240	204	350	3	4.5	38	1038	175	8–34
	200	550	405	345	300	260	350	3	4.5	44	1282	210	12–34
	250	650	470	400	352	313	400	3	4.5	48	1495	240	12–41
	300	750	530	460	412	364	450	4	4.5	54	1965	270	16–41
	350	850	595	525	475	422	500	4	5	60	2185	300	16–41
	400	950	670	585	525	474	305	4	5	66	2573	335	16–48
	450	1050	715	630	570	524	305	4	5	68	2890	360	20–48
	500	1150	800	705	640	576	305	4	5	70	3280	405	20–54
	600	1350	930	820	750	678	305	5	6	76	3800	470	20–58

PN(MPa)	DN	L	D	D1	D2	Y	D0	f	f2	b	H	H1	Z–φ
10.0	50	250	195	145	112	88	250	3	4	28	590	100	4–25
	65	280	220	170	138	110	250	3	4	32	640	115	8–25
	80	310	230	180	148	121	250	3	4	34	680	120	8–25
	100	350	265	210	172	150	300	3	4.5	38	870	135	8–30
	125	400	310	250	210	176	350	3	4.5	42	980	155	8–34
	150	450	350	290	250	204	350	3	4.5	46	1100	180	12–34
	200	550	430	360	312	260	350	3	4.5	54	1315	220	12–41
	250	650	500	430	382	313	400	3	4.5	60	1605	255	12–41
	300	750	585	500	442	364	450	4	4.5	70	2105	295	16–48
	350	850	665	560	498	422	500	4	5	76	2280	335	16–54
	400	950	715	620	558	474	305	4	5	80	2580	360	15–54

Main External and Connection Dimensions (JB/T79.1–1994)

All dimensions in millimeters (mm)

PN (MPa)	DN	L	D	D1	D2	D0	f	b	H	H1	Z–φ
1.6	50	178	160	125	100	250	3	16	584	8122	4–18
	65	190	180	145	120	250	3	18	634	154	4–18
	80	203	195	160	135	250	3	20	688	169	8–18
	100	229	215	180	155	300	3	20	863	193	8–18
	125	254	245	210	185	350	3	22	940	215	8–18
	150	267	280	240	210	350	3	24	1030	283	8–23
	200	292	335	295	265	350	3	26	1277	352	12–23
	250	330	405	355	320	400	3	30	1491	440	12–25
	300	356	460	410	375	450	4	30	1701	514	12–25
	350	381	520	470	435	500	4	34	1875	602	16–25
	400	406	580	525	485	305	4	36	2180	678	16–30
	450	432	640	585	545	305	4	40	2440	785	20–30
	500	457	705	650	608	305	4	44	2860	855	20–34
	600	508	840	770	718	305	5	48	3450	1045	20–41
	700	610	910	840	788	305	5	50	3960	1190	24–41
	800	660	1020	950	898	305	5	52	4550	1350	24–41
	900	711	1120	1050	998	305	5	54	5250	1510	28–41
	1000	611	1255	1170	1110	305	5	56	5870	1715	28–48

PN (MPa)	DN	L	D	D1	D2	D0	f	b	H	H1	Z–φ
2.5	50	178	160	125	100	250	3	20	584	8122	4–18
	65	190	180	145	120	250	3	22	634	154	4–18
	80	203	195	160	135	250	3	22	688	169	8–18
	100	229	230	190	160	300	3	24	863	193	8–23
	125	254	270	220	188	350	3	28	940	215	8–25
	150	267	300	250	218	350	3	30	1030	283	8–25
	200	292	360	310	278	350	3	34	1277	352	12–25
	250	330	425	370	332	400	3	36	1491	440	12–30
	300	356	485	430	390	450	4	40	1701	514	16–30
	350	381	550	490	448	500	4	44	1875	602	16–34
	400	406	610	550	505	305	4	48	2180	678	16–34
	450	432	660	600	555	305	4	50	2440	785	20–34
	500	457	730	660	610	305	4	52	2860	855	20–41
	600	508	840	770	718	305	5	56	3450	1045	20–41
	700	610	955	875	815	305	5	60	3960	1190	24–48
	800	660	1070	990	930	305	5	64	4550	1350	24–48
	900	711	1180	1090	1025	305	5	66	5250	1510	28–54
	1000	811	1305	1210	1140	305	5	68	5870	1715	28–58

PN (MPa)	DN	L	D	D1	D2	D0	f	f2	b	H	H1	Z–φ
4.0	50	250	160	125	100	250	3	4	20	584	80	4–18
	65	280	180	145	120	250	3	4	22	634	95	8–18
	80	310	195	160	135	250	3	4	22	679	100	8–18
	100	350	230	190	160	300	3	4.5	24	863	115	8–23
	125	400	270	220	188	350	3	4.5	28	940	133	8–25
	150	450	300	250	218	350	3	4.5	30	1030	150	8–25
	200	550	375	320	282	350	3	4.5	38	1282	188	12–30
	250	650	445	385	345	400	3	4.5	42	1495	223	12–34
	300	750	510	450	408	450	4	4.5	46	1701	250	16–34
	350	850	570	510	465	500	4	5	52	1880	280	16–34
	400	950	655	585	535	474	4	5	58	2200	310	20–41
	450	1050	680	610	560	524	4	5	60	2480	335	20–41
	500	1150	755	670	612	576	4	5	62	2890	380	20–48
	600	1350	890	795	730	678	5	6	66	3460	450	20–54
	700	1450	995	900	835	768	5	6	68	3985	500	20–54
	800	1650	1135	1030	960	876	5	6	76	4750	570	24–58

PN (MPa)	DN	L	D	D1	D2	Y	D0	f	f2	b	H	H1	Z–φ
6.4	50	250	175	135	105	88	250	3	4	26	584	90	4–23
	65	280	200	160	130	110	250	3	4	28	634	105	8–23
	80	310	210	170	140	121	250	3	4	30	679	110	8–23
	100	350	250	200	168	150	300	3	4.5	32	763	130	8–25
	125	400	295	240	202	176	350	3	4.5	36	970	150	8–30
	150	450	340	280	240	204	350	3	4.5	38	1038	175	8–34
	200	550	405	345	300	260	350	3	4.5	44	1282	210	12–34
	250	650	470	400	352	313	400	3	4.5	48	1495	240	12–41
	300	750	530	460	412	364	450	4	4.5	54	1965	270	16–41
	350	850	595	525	475	422	500	4	5	60	2185	300	16–41
	400	950	670	585	525	474	305	4	5	66	2573	335	16–48
	450	1050	715	630	570	524	305	4	5	68	2890	360	20–48
	500	1150	800	705	640	576	305	4	5	70	3280	405	20–54
	600	1350	930	820	750	678	305	5	6	76	3800	470	20–58

PN (MPa)	DN	L	D	D1	D2	Y	D0	f	f2	b	H	H1	Z–φ
10.0	50	250	195	145	112	88	250	3	4	28	590	100	4–25
	65	280	220	170	138	110	250	3	4	32	640	115	8–25
	80	310	230	180	148	121	250	3	4	34	680	120	8–25
	100	350	265	210	172	150	300	3	4.5	38	870	135	8–30
	125	400	310	250	210	176	350	3	4.5	42	980	155	8–34
	150	450	350	290	250	204	350	3	4.5	46	1100	180	12–34
	200	550	430	360	312	260	350	3	4.5	54	1315	220	12–41
	250	650	500	430	382	313	400	3	4.5	60	1605	255	12–41
	300	750	585	500	442	364	450	4	4.5	70	2105	295	16–48
	350	850	665	560	498	422	500	4	5	76	2280	335	16–54
	400	950	715	620	558	474	305	4	5	80	2580	360	15–54

Specification Applications

Industries

Oil and Gas: Suitable for use in pipelines handling crude oil, natural gas, and refined products.
Chemical Processing: Controls flow in corrosive or high-temperature media in chemical production.
Power Generation: Regulates steam, water, and other fluids in high-pressure power systems.
Water Treatment: Ideal for wastewater, desalination, and other large-scale water processing plants.
Mining and Industrial Processing: Handles abrasive slurries and chemicals in mining operations.

Valve Actuation

Process Optimization

Precision Engineering

Pipeline Solutions

Industrial Valves

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