HH44Z/X、HH44-l6The slow closing check valve is used for water supply and drainage pipeline. It is installed at the outlet of water pump to prevent medium reverse flow and eliminate destructive water hammer. It can effectively reduce the closing water hammer pressure of valve and ensure the safe operation of pipe network. It has the advantages of light valve disc, large opening, small fluid resistance, novel water hammer eliminating mechanism, stable and reliable sealing performance, wear resistance, long service life, stable operation, no vibration and no noise. The retarded slow closing check valve produced by our company can be used in the drainage pipeline of clean water, sewage, sea water and other media, which can not only prevent the backflow fork of the medium, but also effectively limit the destructive water hammer and ensure the safety of the pipeline.

HH44X、HH44T、HH44HPerformance parameters of pn10-pn25 type micro resistance slow closing check valve
model		HH44T-10～25	HH44X-10～25	HH44H-10～25
working pressure（MPa）		1.0～2.5
Applicable temperature（℃）		≤80
Applicable media		water
Material Science	Valve body and cover	Gray cast iron, carbon steel
	Disc	Rubber assembly
	Valve shaft	stainless steel

model	Nominal diameter DN(mm)	Nominal pressure PN(MPa)	Test pressurePs(MPo)		Maximum working pressure (MPa)	working temperature	Applicable media
			housing	seal up
T 16 HH44X-10 H 25	20-800	1.0	1.5	1.1	1.0	0-80℃(root According to user requirements accessible200℃)	Water, weak rot Corrosive medium
T HH44X H		1.6	2.4	1.76	1.6
HH44Z/X		2.5	3.75	2.75	2.5

 

Part name	Valve body and cover	Disc	Valve shaft
Material Science	Gray cast iron, cast steel	Steel plate and rubber assembly	stainless steel

 

HH44X、HH44T、HH44HDimension of external connection of PN10 ～ PN25 micro resistance slow closing check valve（mm)
Nominal diameter	Main shape and connection dimension
	L	W	H
HH44T-10 HH44X-10 H44H-10C HH44T-16 HH44X-16 HH44H-16C HH44T-25 HH44X-25 HH44H-25
50	230	270	300
65	290	290	320
80	310	300	354
100	350	320	350
125	400	340	380
150	480	410	500
200	500	450	580
250	600	550	670
300	700	580	730
350	800	630	820
400	900	700	920
450	1000	800	950
500	1100	900	1100
600	1300	990	1200
700	1400	1120	1550
800	1500	1300	1700

The following matters should be paid attention to in the installation of check valve with main shape and connection dimensions
1. In the pipeline, do not make the check valve bear the weight, large check valve should be independently supported, so that it is not affected by the pressure produced by the pipeline system.
2. During installation, the direction of medium flow should be consistent with the arrow direction of valve body.
3. Lift type vertical disc check valve shall be installed in vertical pipeline.
4. Lift type horizontal disc check valve shall be installed on horizontal pipeline.