Wafer Type Stainless Steel Double Disc Check Valve Check Valve

• Customization: Available
• Media: Water
• Temperature: Ordinary Temperature
• Model NO.: HZH
• Material: Stainless Steel
• Connection Form: Wafer
• Structure: Swing
• Pressure: Ordinary Pressure
• Function: Ddcv Double Lobe
• Sealing Form: Bellows Globe Valve
• Flow Direction: Reversing
• Standard: ANSI
• Application: Industrial Usage, Water Industrial Usage, Household Usage
• Transport Package: Plywood Case
• Specification: DN15-DN300
• Trademark: HUIZHENG
• Origin: China
• HS Code: 8481804090
• Production Capacity: 50000pieces/Year

Product Description

Wafer check valve
Check valve refers to the valve that automatically opens and closes the disc depending on the flow of the medium itself to prevent the medium from flowing back, also known as check valve, one-way valve, reverse flow valve, and back pressure valve. Check valve is a kind of automatic valve, its main function is to prevent the back flow of the medium, prevent the pump and drive motor from reversing, and the discharge of the container medium. The check valve can also be used to supply the auxiliary system whose pressure may rise above the system pressure. Check valves can be divided into swing check valves (rotating according to the center of gravity) and lift check valves (moving along the axis). [1]
Product Usage 
H71H, H71W type PN10~PN40 wafer lift check valve is composed of valve body, disc, spring, etc., installed horizontally or vertically in the pipeline system to prevent the medium from flowing back.

Features 
1. It has short structure, small size and light weight

2. The valve flap closes quickly and the water hammer pressure is small

3. The flow channel is unobstructed, the fluid resistance is small; the action is sensitive, and the sealing performance is good

Performance parameters

Type	Nominal diameter	Test pressure		Working temperature	Applicable temperature
		Shell	packing
H71H-16Q	1.6	2.4	1.76	≤235ºC	Water, steam, oil, etc.
H71H-25Q	2.5	3.75	2.75	≤235ºC
H71W-25H				≤300ºC
H71W-25P				≤200ºC	Corrosive media such as nitric acid
H71W-40H	4	6	4.4	≤300ºC
H71W-40P				≤200ºC	water.steam

Main appearance and connection dimensions

DN(mm)	L	D
		1.6	2.5	4
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