Product classification of Kaiweixi

KAI WEI XI CHAN PIN FEN LEI

H74H Single Plate Wafer Check Valve(Long Type)
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Phone：+86（577）6730 7899
Mobile：+86 189 6779 6135
Fax：+86（577）6738 7099
Email：Yannie@kaiweixi.com
Address：No. 1, Linxia Road, Sanqiao Industrial Zone, Oubei Street, Yongjia County, Zhejiang Province，china
Website：https://www.kaiweixi.com

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H74H Single Plate Wafer Check Valve(Long Type)

Model：H74H-20C/H74H-40C/H74H-64C/H74H-100P/H74H-150P
Specification：DN50-DN600
Temperature：≤ 425 ℃
Medium：Water, Steam, Oil Products

Pressure：PN20-PN150
Connection method：wafer
Driving method：automated
Material： WCB、Stainless Steel

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H74H Single Plate Wafer Check Valve(Long Type)Overview

Overview

The H74H Single Plate Wafer Check Valve(Long Type) is an energy-saving check valve featuring a single-disc design that automatically opens and closes by means of medium flow. It typically adopts a wafer-type connection. The valve body is mainly made of stainless steel, cast steel or ductile iron, with its internal single disc performing rotary motion around a shaft pin. This valve can be installed either horizontally or vertically. When the medium flows in the forward direction, it pushes the disc to open smoothly, providing an unobstructed flow path with minimal pressure loss. When the medium stops or flows backward, the disc quickly returns to its closed position under spring force and reverse medium pressure, offering reliable sealing and fast closing speed. It is specifically designed for piping systems with limited installation space and requiring quick closure. Widely used in water supply and drainage, fire protection systems, HVAC, and industrial circulating water projects, it is a simple, economical and practical pipeline protection device.

H74H Single Plate Wafer Check Valve(Long Type) Product Image

H74H Single Plate Wafer Check Valve(Long Type)Characteristic

Features

1.Simple structure with single disc design: The single disc rotates around a shaft pin, resulting in fewer components, compact construction, low failure rate, economical manufacturing cost, and easy maintenance and replacement.

2.Space-saving wafer connection: Adopts wafer-type connection, featuring short valve body length, light weight, and small pipeline space occupation, especially suitable for applications with limited installation space.

3.Smooth flow passage with low flow resistance: Large disc opening angle allows the medium to pass almost linearly when fully open, providing low fluid resistance and minimal pressure loss, helping to reduce system energy consumption.

4.Flexible installation with strong adaptability: Can be installed horizontally or vertically (with medium flow from bottom to top). Spring-assisted closing ensures reliable sealing under various installation angles.

5.Quick closing with low water hammer: Short disc stroke and spring-assisted return enable rapid closing action, effectively reducing water hammer impact and protecting pipeline equipment safety.

H74H Single Plate Wafer Check Valve(Long Type)structure principle

H74H Single Plate Wafer Check Valve(Long Type) Structure Diagram

Parts Name Material List

阀体Body	阀瓣Disc	阀座Body Seat	阀瓣座Disc Seat	弹簧Spring	介质接触件Wetted Parts
A216WCB/A105	A351 CF8	410SS/Stellite	Same as disc	InconelX-750	410SS
A216WCB/A105	A351 CF8	VITON/BUNA/EPDM	Same as disc	InconelX-750	410 SS
A216WCB/A105	A351CF8M	316SS/Stellite	Same as disc	InconelX-750	316 SS
A216 WCB/A105	A351 CF8M	VITON/BUNA/EPDM	Same as disc	InconelX-750	316 SS
A352LCC/A350 LF2	A351 CF8M	316SS/Stellite	Same as disc	InconelX-750	316 SS
A352LCC/A350 LF2	A351 CF8M	VITON/BUNA/EPDM	Same as disc	InconelX-750	316SS
A351 CF8M/A182F316	A351CF8M	Same as body	Same as disc	InconelX-750	316 SS
A351 CF8M/A182F316	A351 CF8M	VITON/BUNA/EPDM	Same as disc	InconelX-750	316 SS
A890GR 4A/A182F51	A890 GR4A	Same as body	Same as disc	InconelX-750	A182F51
A890 GR5A/A182F53	A890 GR 5A	Same as body	Same as disc	InconelX-750	A182F53
UNS S31254	UNSS31254	Same as body	Same as disc	InconelX-750	254-SMO
UNSN26625	UNSN26625	Same as body	Same as disc	InconelX-750	Inconel 625

H74H Single Plate Wafer Check Valve(Long Type)technology parameter

性能规范表Performance Specification
公称压力Nominal Pressure	2-15	Mpa
强度试验压力Shell Test	3-22.5
密封试验压力Seal Test	2.2-16.5
适用温度Suitable Temp.	≤425	℃

H74H Single Plate Wafer Check Valve(Long Type)standard size

Dimensions Standard Requirements

1. The structural length of the valve shall conform to the standard ASME16.10.

2. The connecting flange shall conform to the standard ASME16.50.

H74H Single Plate Wafer Check Valve(Long Type) View Drawing

H74H Single Plate Wafer Check Valve(Long Type) Dimensions Table

Pressure Rating	Nominal Size		End	Dimensions				Pipe Flange						Weight (kg)
	Nominal Size			L	D	d	B	Diam of Bolts Circle	No of Bolt holes	Diameter of Bolts		Length of Bolts
	NPS	DN		L	D	d	B	Diam of Bolts Circle	No of Bolt holes	Inch	mm	RF	RJ
CL 150 PN20	1-1/2	40	RF	60	85	30	12	98.5	4	1/2	M12	130	145	1.5
	2	50	RF	60	103	38	20	120.5	4	5/8	M16	140	155	2.2
	2-1/2	65	RF	67	122	45	28	139.5	4	5/8	M16	150	165	3.1
	3	80	RF	73	135	56	35	152.5	4	5/8	M16	160	175	4.3
	4	100	RF	73	173	76	55	190.5	8	5/8	M16	170	185	6.3
	5	125	RF	86	195	96	73	216	8	3/4	M20	190	205	8.4
	6	150	RF	98	221	120	90	241.5	8	3/4	M20	205	220	12.6
	8	200	RF	127	277	165	105	298.5	8	3/4	M20	240	255	24
	10	250	RF	146	338	195	122	362	12	7/8	M24	270	285	40
	12	300	RF	181	408	241	130	432	12	7/8	M24	310	325	66
	14	350	RF	184	448	267	155	476	12	1	M27	325	340	83
	16	400	RF	191	513	318	165	540	16	1	M27	340	355	102
	18	450	RF	203	547	356	205	578	16	1-1/8	M30	365	380	124
	20	500	RF	219	604	387	245	635	20	1-1/8	M30	385	400	150
	24	600	RF	222	715	485	320	749.5	20	1-1/4	M33	405	420	203

Pressure Rating		Nominal Size				End	Dimensions								Pipe Flange												Weight (kg)
							L		D		d		B		Diam.of Bolts Circle		No.of Bolt holes		Diameter of Bolts				Length of Bolts
		NPS		DN															Inch		mm		RF		RJ
CL300 PN50		1-1/2		40		RF	60		94		30		12		114.5		4		3/4		M20		160		170		1.8
		2		50		RF	60		110		38		20		127		8		5/8		M16		155		175		2.5
		2-1/2		65		RF	67		128		45		28		149		8		3/4		M20		175		195		4
		3		80		RF	73		147		56		35		168.5		8		3/4		M20		190		210		5
		4		100		RF	73		179		76		55		200		8		3/4		M20		195		215		7
		5		125		RF	86		214		96		73		235		8		3/4		M20		215		235		11.2
		6		150		RF	98		249		120		90		270		12		3/4		M20		230		250		16.5
		8		200		RF	127		305		165		105		330		12		7/8		M24		280		300		31.5
		10		250		RF	146		359		195		122		387.5		16		1		M27		315		335		49.5
		12		300		RF	181		420		241		130		451		16		1-1/8		M30		365		385		81
		14		350		RF	184		483		267		155		514.5		20		1-1/8		M30		410		430		117
		16		400		RF	191		537		318		165		571.5		20		1-1/4		M33		435		455		158
		18		450		RF	203		594		356		205		628.5		24		1-1/4		M33		475		495		200
		20		500		RF	219		652		387		245		686		24		1-1/4		M33		510		535		285
		24		600		RF	222		772		485		320		813		24		1-1/2		M39		560		585		380
Pressure Rating	Nominal Size				End			Dimensions								Pipe Flange												Weight (kg)
								L		D		d		B		Diam.of Bolts Circle		No.of Bolt holes		Diameter of Bolts				Length of Bolts
	NPS		DN																	Inch		mm		RF		RJ
CL600 PN110	2		50		RF/RJ-23			60		110		38		20		127		8		5/8		M16		175		180		2.5
	2-1/2		65		RF/RJ-26			67		128		45		28		149		8		3/4		M20		195		200		4
	3		80		RF/RJ-31			73		147		56		35		168.5		8		3/4		M20		210		215		5
	4		100		RF/RJ-37			79		191		76		55		216		8		7/8		M24		235		240		9
	5		125		RF/RJ-41			105		240		96		73		266.5		8		1		M27		280		285		14.5
	6		150		RF/RJ-45			136		264		120		90		292		12		1		M27		320		325		27
	8		200		RF/RJ-49			165		318		165		105		349		12		1-1/8		M30		370		375		48
	10		250		RF/RJ-53			213		398		195		122		432		16		1-1/4		M33		440		445		93.5
	12		300		RF/RJ-57			229		455		241		130		489		20		1-1/4		M33		460		465		114.5
	14		350		RF/RJ-61			273		490		267		155		527		20		1-3/8		M36		520		525		187
	16		400		RF/RJ-65			305		562		318		165		603		20		1-1/2		M39		575		580		261
	18		450		RF/RJ-69			362		610		355		205		654		20		1-5/8		M42		650		655		365
	20		500		RF/RJ-73			368		680		385		245		724		24		1-5/8		M42		670		680		453
	24		600		RF/RJ-77			438		786		480		320		838		24		1-7/8		M48		780		790		705

Pressure Rating	Nominal Size		End	Dimensions				Pipe Flange						Weight (kg)
	Nominal Size			L	D	d	B	Diam.of Bots Circle	No.of Bolt holes	Diameter of Bolts		Length of Bolts
	NPS	DN		L	D	d	B	Diam.of Bots Circle	No.of Bolt holes	Inch	mm	RF	RJ
CL900 PN150	2	50	RF/RJ-24	70	140	38	20	165	8	7/8	M24	225	230	6
	2-1/2	65	RF/RJ-27	83	162	45	28	190.5	8	1	M27	250	255	7.5
	3	80	RF/RJ-31	83	165	56	35	190.5	8	7/8	M24	240	245	9.6
	4	100	RF/RJ-37	102	204	76	55	235	8	1-1/8	M30	285	290	17
	5	125	RF/RJ-41	110	245	96	73	279.5	8	1-1/4	M33	310	315	28
	6	150	RF/RJ-45	159	286	120	90	317.5	12	1-1/8	M30	365	370	41
	8	200	RF/RJ-49	206	356	165	105	393.5	12	1-3/8	M36	440	445	80
	10	250	RF/RJ-53	241	432	195	122	470	16	1-3/8	M36	490	495	135
	12	300	RF/RJ-57	292	495	241	130	533.5	20	1-3/8	M36	560	565	212
	14	350	RF/RJ-62	356	520	267	155	559	20	1-1/2	M39	645	655	335
	16	400	RF/RJ-66	384	572	318	165	616	20	1-5/8	M42	685	695	395
	18	450	RF/RJ-70	451	636	355	205	686	20	1-7/8	M48	790	800	600
	20	500	RF/RJ-74	451	696	385	245	749.5	20	2	M52	810	820	810
	24	600	RF/RJ-78	495	835	480	320	901.5	20	2-1/2	M64	945	955	1030

Articles related to technology research and development

Slow-closing wafer check valve patent

The utility model provides a slow-closing wafer check valve, which includes a valve body, a valve disc, a valve shaft, and a torsion spring sleeved on the valve shaft. The valve body is provided with a medium channel for medium circulation in the axial direction, which includes an inlet end and an outlet end. The valve disc, valve shaft, and torsion spring are symmetrically arranged in two groups relative to the center of the valve body. The utility model further includes a damping device located at the inlet end, which includes a cylinder inserted on the valve body, a piston rod located inside the cylinder, a spring, and a cover connected to the outer end of the cylinder. The cylinder is provided with a first cavity and a second cavity that are connected and communicated. The cross-section of the second cavity is square, and its cross-sectional area is larger than that of the first cavity. One end of the piston rod located inside the medium channel is provided with a movable block. The utility model has low noise and technical characteristics of quick opening, slow closing, and water hammer elimination, enabling light-load pump start-up and preventing the generation of water hammer during pump shutdown.
1. A slow-closing wafer check valve, comprising a valve body, a valve disc, a valve shaft, and a torsion spring sleeved on the valve shaft. The valve body is provided with a medium passage for medium circulation in the axial direction, and the medium passage includes an inlet end and an outlet end. The valve disc, valve shaft, and torsion spring are symmetrically arranged in two groups relative to the center of the valve body. The valve also comprises a damping device located at the inlet end. The damping device includes a cylinder inserted on the valve body, a piston rod located inside the cylinder, a spring, and a cover connected to the outer end of the cylinder. The cylinder is provided with a first cavity and a second cavity that are connected and communicated. The cross-section of the second cavity is square, and the cross-sectional area of the second cavity is larger than that of the first cavity. One end of the piston rod is located inside the second cavity, and the other end penetrates through the first cavity and is located inside the medium passage. The end of the piston rod located inside the medium passage is provided with a movable block, and the end of the piston rod located inside the second cavity is provided with an external thread. The second cavity is provided with a limit plate that is adapted to and threadedly connected with the piston rod. The spring is sleeved on the piston rod, with one end abutting against the limit plate and the other end abutting against the inner wall of the second cavity. The side of the valve disc facing the piston rod is provided with a driving block that cooperates with the movable block. During the closing process of the valve disc, the side of the driving block facing the center of the valve body cooperates with the movable block to achieve displacement of the piston rod relative to the cylinder towards the center of the valve body. The damping device is symmetrically arranged in two groups relative to the center of the valve body.
2. A slow-closing wafer check valve according to claim 1, characterized in that a square hole is axially provided at the end of the piston rod located in the second cavity, an adjuster is inserted at a position on the cover corresponding to the square hole, a driving rod adapted to the square hole is provided at the end of the adjuster, and the adjuster is rotatable relative to the cover.
3. A slow-closing wafer check valve according to claim 2, characterized in that a limit slot is provided at the connection between the cover and the regulator, and a limit mechanism is arranged inside the limit slot. The limit mechanism comprises a ball, a tower spring connected to the ball, and a positioning column for fixing the tower spring. At least four engaging slots adapted to the ball are provided circumferentially at the connection between the regulator and the cover.
4. A slow-closing wafer check valve according to claim 3, characterized in that the top edge of the engaging groove is provided with a rounded corner.
5. A slow-closing wafer check valve according to claim 1, characterized in that the valve body is provided with a stepped groove adapted to the cylinder body.
6. A slow-closing wafer check valve according to claim 5, characterized in that a sealing ring is sleeved at the connection between the cylinder and the valve body.
7. A slow-closing wafer check valve according to claim 1, characterized in that the valve disc is provided with a build-up welding layer that is sealed with the valve body. 8. A slow-closing wafer check valve according to claim 7, characterized in that one side of the build-up welding layer is provided with vulcanized rubber that is sealed with the valve body.

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Product classification of Kaiweixi

KAI WEI XI CHAN PIN FEN LEI

H74H Single Plate Wafer Check Valve(Long Type)

More Swing check valve>>

More check valve>>

More valve>>

H74H Single Plate Wafer Check Valve(Long Type)