Product Description

Wafer connection lift check valve, also known as wafer check valve, is mainly composed of valve body, valve disc, spring, etc. It can be installed in various pipeline systems horizontally or vertically to prevent the backflow of the medium. The advantages of small size and light weight. The valve disc of the valve closes quickly, the water hammer pressure is small, the flow channel is smooth, the fluid resistance is small, the action is sensitive, and the sealing performance is good. It is mainly suitable for clean medium, not suitable for pipelines containing solid particles and high viscosity medium. It can be installed at the outlet of the pump to avoid water hammer, water hammer sound and destructive impact, achieve the purpose of preventing backflow and protecting equipment, and has better energy saving effect.

Product Features

1. The product structure is short in length, small in size and light in weight.2. The sealing flap can choose soft sealing or hard sealing material according to different working conditions, and the sealing performance is good.3. Both horizontal and vertical pipes can be used, and the installation is convenient.4. The valve disc closes quickly and the water hammer pressure is small.5. The material of the parts and the form and size of the valve end face can be reasonably selected according to the actual working conditions or user requirements to meet various engineering needs.

Material of main parts

Specifications	Body	Disc	Spring
H71H-16Q、H71H-25Q	QT400-15	25	50CrCA
H71W-25H、H71W-40H	2Cr13	1Cr13	1Cr18Ni9Ti
H71W-16P、H71W-25P	ZG1Cr18Ni9Ti	1Cr18Ni9Ti	1Cr18Ni9Ti

Main performance specifications

Model	PN(MPa)	Test pressure PS(MPa)		Operating temperature(℃)	Applicable media
		Case	Seal
H71W-16T	1.6	2.4	1.76	≤200	Water, steam, oil, etc.
H71H-25Q	2.5	3.75	2.75	≤235
H71W-25H				≤300
H71W-25P				≤200	Corrosive media such as nitric acid
H71W-40H	4.0	6.0	4.4	≤300	Water, steam, oil, etc.
H71W-40P				≤200	Corrosive media such as nitric acid

Main external connection dimensions

DN(mm)	L	D
		1.6	2.5	4.0
15	25	48	48	48
20	31.5	58	58	58
25	35.5	68	68	68
32	40	80	80	80
40	45	90	90	90
50	56	105	105	105
65	63	125	125	125
80	71	140	140	140
100	80	160	165	165
125	110	190	195	195
150	125	215	225	225
200	160	270	285	290
250	200	330	340	350
300	250	385	400	415