DHH44X/H micro resistance slow closing silencing check valveDetailed product description：

DHH44X/H-10/16 check valves are mainly used at the outlet of industrial and urban water supply and drainage pipelines, high-rise residential buildings, high-end hotels, and pressurized water pumps. In the design, full consideration was given to the requirements of the usage environment, and a sloping plate structure was adopted to achieve vibration free, noise free, and smooth operation, ensuring a quiet and energy-efficient environment for hotels and residences. By delaying the closure, local backflow water is released into the system, greatly reducing the water pressure impulse caused by pump shutdown and eliminating the occurrence of destructive water hammer peaks. The cut-off seal is made of nitrile rubber, which has good sealing performance, shock absorption and wear resistance, long service life, and easy maintenance.

DHH44X/H micro resistance slow closing silencing check valve main component materials:

Part Name	valve body	butterfly valve disc	valve stem	Buffer oil cylinder	Seal ring
Material	Grey cast iron, cast steel	Carbon steel	stainless steel	stainless steel	Nitrile rubber

Main technical parameters of DHH44X/H micro resistance slow closing silencing check valve:

Model	Nominal pressure (MPa)	Test pressure (MPa)		Applicable temperature	Applicable Medium
		housing	seal
DHH44X DHH44H	one	one point five	one point one	≤80℃	Clear water, sewage, seawater, mud water
	one point six	two point four	one point seven five

Main external connection dimensions of DHH44X/H micro resistance slow closing silencing check valve:

DN（mm)

two hundred

two hundred and fifty

three hundred

three hundred and fifty

four hundred

four hundred and fifty

five hundred

six hundred

seven hundred

eight hundred

nine hundred

one thousand

one thousand and two hundred

one thousand and four hundred

one thousand and six hundred

two thousand

L

two hundred and thirty

two hundred and fifty

two hundred and seventy

two hundred and ninety

three hundred and ten

three hundred and thirty

three hundred and fifty

three hundred and ninety

four hundred and thirty

four hundred and seventy

five hundred and ten

five hundred and fifty

six hundred and thirty

seven hundred and ten

seven hundred and ninety

nine hundred and fifty

H

five hundred and fifty

six hundred and thirty

six hundred and ninety

seven hundred and eighty

eight hundred and sixty

nine hundred and ten

nine hundred and eighty

one thousand and seventy

one thousand two hundred and twenty

one thousand three hundred and twenty

one thousand four hundred and thirty

one thousand five hundred and fifty

one thousand and eight hundred

one thousand nine hundred and eighty

two thousand one hundred and fifty

two thousand five hundred and fifty

B

four hundred and fifty

five hundred and twenty

five hundred and ninety

six hundred and seventy

seven hundred and fifty

seven hundred and eighty

eight hundred and fifty

nine hundred and seventy

one thousand and eighty

one thousand and two hundred

one thousand and three hundred

one thousand four hundred and fifty

one thousand six hundred and seventy

one thousand eight hundred and eighty

one thousand nine hundred and fifty

two thousand four hundred and fifty