HH46x、HDH4 8x、HH49X

Slow closing check valve series products can be used in water, sewage, sea water and other medium of the drainage pipeline, both to prevent the media back fork can effectively limit the destructive water hammer to ensure the safety of the use of pipelines. The structure has the characteristics of novel structure, small volume, light weight, small fluid resistance, reliable sealing, smooth opening and closing, abrasion resistance, long service life, slow closing and no medium influence, and has good energy saving effect. Micro slow close silencing check valve in the design fully consider the use of environmental requirements, the inclined plate structure, no vibration, no noise, to ensure smooth operation, hotels, residential environment is quiet, and has the effect of energy saving. DHH44X/H-10/16 type micro slow close check valve with delayed closing the local water system to flow down, thereby greatly reducing the hydraulic pressure impulse pump stop backflow, eliminate the destructive water hammer peak produced by the nitrile rubber sealing closure, good sealing performance, damping abrasion resistance, long service life and easy maintenance etc..
Micro resistance slow closing noise elimination check valve is suitable for clean medium, it is not suitable for the medium containing solid particles and large viscosity.

Part name	valve body	Valve	Stem, oil Cylinder, piston	Spring	Valve seat
Material Science	Cast iron, cast steel	carbon steel	Stainless steel	Stainless steel	Nitrile rubber

Model	Nominal pressure PN(MPa)	Strength test pressure	Seal pressure (MPa)	For temperature  (℃)	For medium	Slow closing time
HH46X HDH48X HH49X	1.0	1.5	1.1	≤80	Water Sewage seawater	≤60秒
	1.6	2.4	1.76
	2.5	3.75	2.75

Nominal pressure	Nominal diameter	Size fmm)
		L	H	H1
1.0 1.6 2.5	40	140	200	88
	50	150	215	98
	65	170	225	108
	80	180	235	118
	100	190	280	130
	125	200	290	148
	150	210	310	172
	200	230	350	210
	250	250	415	240
	300	270	450	264