National standard flange gate valve

NegotiableUpdate on 12/31

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Overview

Overview of National Standard Flange Gate Valve: National standard flange gate valve has the characteristics of low fluid resistance, wide applicable pressure and temperature range, etc. It is the most commonly used block valve, used to cut off or connect the medium in the pipeline

Product Details

Overview of National Standard Flange Gate Valve】

The national standard flange gate valve has the characteristics of low fluid resistance, wide applicable pressure and temperature range, and is the most commonly used block valve for cutting off or connecting media in pipelines.

【National standard flange gate valve product features】

① Meets the requirements of advanced domestic and international standards, with reliable sealing and excellent performance.
② The valve body material variety is complete, and the packing and gasket can be reasonably selected according to actual working conditions or user requirements, which can be suitable for various pressure, temperature, and medium working conditions.
③ Adopting a wedge-shaped elastic gate structure, rolling bearings are installed on medium and large diameters for easy opening and closing.
④ Multiple piping flange standards and flange sealing surface types can be used to meet various engineering needs and user requirements.
⑤ We have developed a low-pressure carbon steel gate valve with PN1.0MPa, which can replace iron gate valves and effectively solve the problems of easy freezing and cracking of cast iron gate valve shells, easy detachment of gate plates, easy corrosion of valve stems, and unreliable sealing performance.
⑥ We have developed a low-pressure stainless steel series gate valve with PN1.0MPa, which can be applied to various corrosive media working conditions, reduce costs, and save materials.

Application scope of national standard flange gate valve】

The national standard flange gate valve is suitable for nominal pressure PN1.0-16.0MPa, working temperature -29~425 ℃ (carbon steel) and -40~200 ℃ (stainless steel) pipelines, and is used to cut off or connect the medium in the pipeline. By selecting different materials, it can be applied to various media such as water, steam, oil, nitric acid, acetic acid, strong oxidizing media, and urea. The driving modes include manual, bevel gear transmission, and electric.

National standard specification for flange gate valves

Design and Manufacturing	structural length	Pressure temperature rating	flange connection	Testing and Inspection
GB12234	GB1221	GB9131、 JB/T74、 HGJ67	JB/T74～90、 GB9112～9131、 HGJ44～76	JB/T9092

National standard flange gate valve model, material and main parameters】

Lord want zero document material material	Valve body, valve cover, gate plate		WCB	ZG1Cr18Ni9Ti	CF8 (304)	CF3 (304L)	ZG1Cr18Ni12Mo2Ti	CF8M (316)
	sealing surface		Cr13 or hard 合金	Body (W) or hard alloy (Y)
	Valve stem and internal components		2Cr13	1Cr18Ni9Ti	0Cr19Ni9 (304)	00Cr19Ni11 (304L)	1Cr18Ni12Mo2Ti	0Cr17Ni12Mo2 (316)
	filler		flexible graphite
	shim		Stainless steel wrapped gasket
Applicable working conditions		Applicable Medium	Water Steam Oil products, etc	Corrosive media such as nitric acid		Strong oxidizing medium	Corrosive media such as acetic acid
		Applicable Temperature	-29～425℃	-40～500℃

【Main dimensional parameters of the national standard flange gate valve series】

Nominal Pressure PN (MPa)	Nominal Diameter DN （mm）	size^①(mm)										Weight (kg)
		L	D	D₁	D₂	b	Z-φd	W	H_open^③			Weight (kg)
		L	D	D₁	D₂	b	Z-φd	W	Z_A40	Z_A540	Z_A940	Z_A40	Z_A540	Z_A940
1.0	25	127	115	85	65	14	4-14	100	200	-	330	6	-	31
	32	140	135	100	78	16	4-18	120	235	-	375	8	-	33
	40	165	145	110	85	16	4-18	140	285	-	435	12	-	37
	50	178	160	125	100	16	4-18	180	390	-	610	17	-	43
	65	190	180	145	120	18	4-18	180	435	-	655	22	-	63
	80	203	195	160	135	20	4-18	200	515	-	680	32	-	81
	100	229	215	180	155	20	8-18	200	595	-	750	42	-	90
	125	254	245	210	185	22	8-18	250	725	-	820	54	-	104
	150	267	280	240	210	22	8-23	250	780	-	900	72	-	123
	200	292	335	295	265	24	8-23	300	975	1010	1060	110	140	166
	250	330	390	350	320	26	12-23	300	1150	1190	1250	160	195	212
	300	356	440	400	368	26	12-23	350	1380	1420	1500	230	260	292
	350	381	500	460	428	26	16-23	350	1540	1580	1750	350	395	440
	400	406	565	515	482	26	16-25	400	1740	1780	1950	450	505	575
	450	432	615	565	532	28	20-25	400	1950	1990	2150	550	600	680
	500	457	670	620	585	28	20-25	500	2180	2220	2350	640	700	780
	600	508	780	725	685	28	20-30	600	2560	2600	2710	890	950	1030
1.6	25	127	115	85	65	14	4-14	120	200	-	330	7	-	31
	32	140	135	100	78	16	4-18	140	235	-	375	9	-	33
	40	165	145	110	85	16	4-18	180	285	-	435	13	-	38
	50	178	160	125	100	16	4-18	180	390	-	610	19	-	45
	65	190	180	145	120	18	4-18	200	435	-	655	24	-	65
	80	203	195	160	135	20	8-18	200	515	-	680	36	-	85
	100	229	215	180	155	20	8-18	250	595	-	750	46	-	95
	125	254	245	210	185	22	8-18	250	725	-	820	65	-	115
	150	267	280	240	210	24	8-23	300	780	-	900	82	-	135
	200	292	335	295	265	26	12-23	300	975	1010	1060	126	155	182
	250	330	405	355	320	30	12-25	350	1150	1190	1250	178	213	230
	300	356	460	410	375	30	12-25	400	1380	1420	1500	258	290	320
	350	381	520	470	435	34	16-25	400	1540	1580	1750	385	430	470
	400	406	580	525	485	36	16-30	500	1740	1780	1950	485	540	610
	450	432	640	585	545	40	20-30	500	1950	1990	2150	580	640	710
	500	457	705	650	608	44	20-34	600	2180	2220	2350	680	740	820
	600	508	840	770	718	48	20-41	650	2560	2600	2710	940	1000	1080

【Medium and high pressure national standard flange gate valve series size parameters】

Nominal Pressure PN (MPa)	Nominal Diameter DN （mm）	size^①(mm)												Weight (kg)
		L	L_J^②	D	D₁	D₂	D₆	b	Z-φd	W	H_open^③			Weight (kg)
		L	L_J^②	D	D₁	D₂	D₆	b	Z-φd	W	Z_A40	Z_A540	Z_A940	Z_A40	Z_A540	Z_A940
2.5	25	127	137	115	85	65	-	16	4-14	120	200	-	340	8	-	33
	32	140	150	135	100	78	-	18	4-18	140	235	-	380	11	-	38
	40	165	175	145	110	85	-	18	4-18	180	285	-	440	15	-	45
	50	178	188	160	125	100	-	20	4-18	180	390	-	620	24	-	65
	65	190	202	180	145	120	-	22	8-18	200	435	-	670	28	-	75
	80	203	215	195	160	135	-	22	8-18	250	515	-	695	43	-	95
	100	229	245	230	190	160	-	24	8-23	250	595	-	765	52	-	105
	125	254	270	270	220	188	-	28	8-25	300	725	-	835	76	-	130
	150	267	283	300	250	218	-	30	8-25	300	780	-	950	98	-	190
	200	292	310	360	310	278	-	34	12-25	350	975	1010	1120	170	210	270
	250	330	348	425	370	332	-	36	12-30	400	1150	1190	1320	230	280	320
	300	356	374	485	430	390	-	40	16-30	400	1390	1430	1520	340	390	450
	350	381	399	550	490	448	-	44	16-34	500	1545	1585	1770	470	520	630
	400	406	424	610	550	505	-	48	16-34	600	1755	1795	1980	650	710	770
	450	432	450	660	600	555	-	50	20-34	600	1960	2000	2200	750	840	980
	500	457	-	730	660	610	-	52	20-41	650	2195	2235	2400	910	980	1240
	600	508	-	840	770	718	-	56	20-41	650	2580	2620	2750	1250	1330	1500
4.0	25	165	175	115	85	65	58	16	4-14	140	215	-	370	9	-	38
	32	178	188	135	100	78	66	18	4-18	180	255	-	420	12	-	42
	40	190	200	145	110	85	76	18	4-18	200	320	-	480	16	-	55
	50	216	226	160	125	100	88	20	4-18	200	425	-	650	26	-	69
	65	241	253	180	145	120	110	22	8-18	250	460	-	700	34	-	80
	80	283	295	195	160	135	121	22	8-18	300	540	-	740	47	-	100
	100	305	321	230	190	160	150	24	8-23	300	630	-	795	73	-	110
	125	381	397	270	220	188	176	28	8-25	350	760	-	850	110	-	145
	150	403	419	300	250	218	204	30	8-25	350	825	-	990	130	-	200
	200	419	437	375	320	282	260	38	12-30	400	1020	1055	1150	210	250	295
	250	457	475	445	385	345	313	42	12-34	450	1200	1240	1350	280	340	390
	300	502	520	510	450	408	364	46	16-34	500	1425	1465	1560	400	450	570
6.3(6.4)	25	165	178	135	100	78	58	22	4-18	180	215	-	400	10	-	42
	32	178	191	150	110	82	66	24	4-23	180	270	-	460	14	-	50
	40	190	203	165	125	95	76	24	4-23	200	345	-	520	20	-	62
	50	216	232	175	135	105	88	26	4-23	200	470	-	680	30	-	75
	65	241	257	200	160	130	110	28	8-23	250	520	-	750	40	-	90
	80	283	299	210	170	140	121	30	8-23	300	570	-	820	55	-	110
	100	305	321	250	200	168	150	32	8-25	300	700	-	870	80	-	140
	125	381	397	295	240	202	176	36	8-30	350	780	-	950	120	-	200
	150	403	419	340	280	240	204	38	8-34	350	850	-	1100	165	-	250
	200	419	435	405	345	300	260	44	12-34	400	1035	1085	1270	250	295	420
10.0	25	216	229	135	100	78	58	24	4-18	180	215	-	420	16	-	52
	32	229	242	150	110	82	66	24	4-23	180	270	-	480	25	-	62
	40	241	254	165	125	95	76	26	4-23	200	345	-	550	30	-	74
	50	292	308	195	145	112	88	28	4-25	250	470	-	680	42	-	82
	65	330	346	220	170	138	110	32	8-25	250	520	-	750	55	-	97
	80	356	372	230	180	148	121	34	8-25	300	570	-	820	70	-	120
	100	432	448	265	210	172	150	38	8-30	300	700	-	870	120	-	155
	125	508	524	310	250	210	176	42	8-34	350	780	-	950	180	-	250
	150	559	575	350	290	250	204	46	12-34	400	850	890	1100	250	290	340

Note: ① The flange connection dimensions in the table are JB/T74-90 series 2 dimensions (equivalent to the original machine standard JB74-90 dimensions).
② LJ is the structural length of the flange gate valve with a ring connection surface.
③ H indicates the height dimension including the drive mechanism when the gate valve is fully open.

Product Commitment:
Zhenggang Valve has always adhered to integrity as the soul of the enterprise. Adhering to the business principle of providing high-quality products and dedicated service to customers, the company aims to meet customer needs and is willing to promote cooperation through its own efforts to provide customers with high-quality products and excellent services. Zhenggang implements an open service commitment.
1. From the date of supply, the products provided by Zhenggang have a warranty period of 12-24 months under normal use. During the warranty period, all products are guaranteed to have quality, quantity, repair, and replacement. We also provide lifelong free consultation services.
2. If the product is damaged or used improperly due to transportation, loading and unloading, storage, unauthorized disassembly, improper maintenance, natural disasters, or outside the warranty period, our company will provide lifelong technical services for the product and only charge the cost of the accessories.
3. If users discover product quality issues or service complaints, Zhenggang will arrive at the scene within 2 hours in the urban area of the city based on the distance of the journey after receiving the user's letter. If there are major problems in other areas, Zhenggang guarantees to arrive at the scene within 24 hours and provide timely answers and solutions to ensure customer satisfaction.
4. The company promises to provide maintenance services quickly at the most reasonable and favorable price after the warranty period expires, and to send technical personnel to the buyer's site for technical services upon request.
5. The company has sufficient supply of goods, complete varieties, abundant accessories, strict emergency plans and measures, and can timely solve users' temporary emergency needs.
During the use of the product, Zhenggang will actively adopt and improve feedback from users on product quality, performance, improvement suggestions, or other constructive suggestions in order to further improve product quality and better reward users.
Ordering instructions:
1. Product selection: If there are specified model standards, please contact the live sales hotline to inquire about prices and learn more details!
2. Technical support: If the product model and specifications are not specified, please send the operating requirements, design drawings, and technical specifications to our company by fax or email.
3. Parameter description: Please provide the diameter (DN), nominal pressure (Mpa), temperature (℃), connection method (thread, flange, clamp, etc.), and driving method.
4. Drive modes: manual, worm gear, pneumatic, electric, etc.
5. Product standards: National standard GB, Japanese standard JIS, American standard ANSI, German standard DIN, etc.
6. Quotation confirmation: Our company provides a quotation list and technical standard specifications to the customer for confirmation. After both parties confirm the technical aspects, we will draft the contract.
7. Quality standards: Quality requirements, quality standards, and conditions for suppliers to be responsible for quality shall be in accordance with relevant national quality standards.