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Flat Gate Valve

Flat plate gate valve is a type of valve that uses a flat plate gate to control the flow of medium through straight stroke opening and closing. A hard seal or elastic seal structure is often configured between the valve plate and the valve seat, with bidirectional sealing capability. Its flow channel is straight and has low flow resistance, suitable for pipelines containing particles, slurry or corrosive media (such as chemical and mining industries). The surface of the valve plate is often treated with nitriding, tungsten carbide or ceramic, wear-resistant and pressure resistant (PN16-PN40), and has the characteristics of compact structure, easy maintenance and long service life.

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Bidirectional sealing and anti-interference ability
Wide applicability
Convenient operation and optimized structure
Wear resistance and long lifespan
Low flow resistance and high flow capacity
Efficient sealing performance

Bidirectional sealing and anti-interference ability

Bidirectional sealing and anti-interference ability
01
Bidirectional hard seal design, no medium flow restriction, no pressure loss, can prevent suspended particles from scouring the sealing surface;
02
Wedge shaped elastic sealing technology enhances the anti jamming ability and adapts to harsh working conditions of high solid content media.

Wide applicability

Wide applicability
01
The temperature resistance range covers -196 ℃ (cryogenic) to 550 ℃ (high-temperature steam), and the medium is compatible with crude oil, natural gas, acid-base solutions, and slurries containing 30% -60% solid particles;
02
The model with guide holes supports direct passage of the cleaning device and is suitable for pipeline cleaning operations.

Convenient operation and optimized structure

Convenient operation and optimized structure
01
Small opening and closing torque, fast linear action (response time<1 second), supports manual, electric, and pneumatic drive; The modular structure is simple, and disassembly and maintenance do not require professional personnel. Ordinary workers can complete repairs.

Wear resistance and long lifespan

Wear resistance and long lifespan
01
The surface of the valve plate is hardened by nitriding, tungsten carbide spraying, or coated with an engineering ceramic/Satellite alloy layer, which increases wear resistance by 2-3 times;
02
The valve seat is designed to be detachable, making it easy to replace seals and reduce maintenance costs.

Low flow resistance and high flow capacity

Low flow resistance and high flow capacity
01
Direct flow channel design (non tapered pipe), with low fluid resistance and low pressure drop loss, suitable for high flow scenarios such as long-distance pipelines;
02
In the fully open state, there is no medium steering, and the flow rate is close to the level of a short pipe, reducing energy consumption by more than 30%.

Efficient sealing performance

Efficient sealing performance
01
Adopting a composite structure of metal hard seal and soft seal to adapt to pressure fluctuations and temperature changes, the leakage level can reach Class VI (zero leakage);
02
The automatic positioning design of the sealing surface avoids damage to the sealing surface caused by thermal deformation of the valve body, and supports the thermal elongation of the valve stem during cold closure without causing overload.

Main Component Materials

Part Name	Component materials
Part Name	JB/T7298		API6D
Valve/valve cover	WCB	WC6	A352-LCB	A351-CF8M
ram	2Cr13+ENP	20CrMoV+STL	ANSI 410-ENP	ANSI316+ENP
valve stem	2Cr13	2Cr13	A182-F6a	A182-F316S
valve seat	25+PTFE	20CrMoV+STL	A105+PTFE	A182-F316-PTFE
filler	NBT/EPM	flexible graphite		Polytetrafluoroethylene/PTFE+FPM
shim	18-8/Flexible Graphite
bolt	35	35CrMo	A193-B7M	A193-B8
Applicable Temperature	-29~250℃	-29~550℃	-46~350℃	-40~200℃
Applicable Medium	Water, oil, steam	Steam and oil products	Propane, ethylene	Nitric Acid

Performance Specifications & Dimensions

Nominal Pressure PN

1.0/1.6/2.5/4.0/6.4/10.0/16.0
Shell F

Px1.5
Sealing Pressure

Px1.1
Medium

Oil, natural gas, water, etc
Temperature (℃)

G-type -29~250℃、D-type 46~121℃、Ordinary Type-29~121℃

Nominal Diameter DN(mm)	L	D	D1	D2	D0	f	b	H	H1	z-Φd
PN1.6MPa
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	250	5	54	5250	565	28-41
1000	811	1255	1170	1110	250	5	56	5870	630	28-48
PN2.5MPa
50	178	160	125	100	250	3	20	584	80	4-18
65	190	180	145	120	300	3	22	634	95	8-18
80	203	195	160	135	350	3	22	688	100	8-18
100	229	230	190	160	350	3	24	863	114	8-23
125	254	270	220	188	350	3	28	940	132	8-25
150	267	300	250	218	400	3	30	1030	150	8-25
200	292	360	310	278	450	3	34	1277	168	12-25
250	330	425	370	332	500	3	36	1491	203	12-30
300	356	485	430	390	305	4	40	1701	237	16-30
350	381	550	490	448	305	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		5	66	5250	595	28-54
1000	811	1305	1210	1140		5	68	5870	660	28-58

Note: The pressure range is 1.6MPa~16.0MPa. The above data is for reference only. Please consult the company's sales department for details.

Valve Application

Oil & Gas Transportation

Oil and gas transportation involves multiple modes such as pipelines and ships, and is the core link of the energy supply chain.
Chemical Raw Material Control

The control of chemical raw materials covers the entire process of mining, storage, and production, ensuring safety and process stability.
High Temperature SteamPipeline in Power System

High temperature steam pipelines are the core of energy transmission in power systems, supporting the efficient operation of thermal and nuclear power plants.
Other Industries

Valves control fluids in multiple industries such as new energy and electronics, ensuring safe and efficient production.

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