HH47 butterfly buffer check valveDetailed product description：

The HH47 butterfly buffer check valve ensures zero leakage after closing by sealing the secondary three center eccentric valve plate, ensuring smooth opening of the valve plate with small damping during valve opening, and ensuring speed with two-stage closing, while effectively buffering and eliminating water hammer impact.

Application of HH47 butterfly buffer check valve:

1. This valve is suitable for large-diameter water or steam medium pipelines, serving as a check valve that can achieve fast and slow closing, effectively preventing water hammer impact.
2. The three eccentric sealing structure ensures zero leakage, smooth opening action, and low flow resistance.
3. The fast closing section has almost no resistance, the slow closing section has smooth buffering, no water hammer, and no impact noise.
4. The sealing pair with three eccentricities and a valve plate with a large secondary eccentricity structure separates when the sealing pair is opened and seals when the contact is closed, effectively reducing cover wear and extending service life.

Main technical parameters of HH47 butterfly buffer check valve

Nominal Pressure	PN			ANSI
	0.25～6.4MPa			150LB-300LB
The nominal Tongjing	PN2.5（DN300～DN2000），PN6（DN300～DN2000），PN10（DN300～DN1600），PN16（DN300～1000），PN25，PN40，PN64（DN300～DN800）
strength test	1.5 times
Sealing Test	1.1 times
Valve body material	gray cast iron	ductile cast iron	Carbon steel C	Alloy Steel I	Stainless steel P/R
Operating Temperature	0～150℃	-15～300℃	-29～425℃	-29～530℃	-196～600℃
Applicable Medium	Water, steam, gas, oil, etc	Water, steam, gas, oil, etc	Water, steam, gas, oil, etc	Water, steam, gas, oil, etc	Acetic acid and nitric acid

Execution Standard

design and manufacturing	flange connection	structural length	pressure test
GB122236	GB17241.6、GB9113	GB12221	ZBJ16006
ANSI B16.34	ANSI B16.5 or MSS-SP-44CL	API609	AP1598

HH47 butterfly buffer check valve main external connection dimensions Unit: mm

DN

L

B1

B2

Dimensions of flange connections for each nominal pressure level

Remark

zero point two five

zero point six

one

one point six

two point five

four

six point four

150LB

300LB

three hundred

one hundred and seventy-eight

one thousand

eight hundred and nine

GB/T17241.6

GB/T9113

ANSI B16.5 MSS-SP-44CL

three hundred and fifty

one hundred and ninety

one thousand

eight hundred and thirty-eight

four hundred

two hundred and sixteen

one thousand

eight hundred and sixty-two

four hundred and fifty

two hundred and twenty-two

one thousand

eight hundred and eighty-seven

five hundred

two hundred and twenty-nine

one thousand four hundred and sixty-five

nine hundred and five

six hundred

two hundred and sixty-seven

one thousand four hundred and sixty-five

nine hundred and sixty

seven hundred

two hundred and ninety-two

one thousand four hundred and sixty-five

one thousand and fifteen

eight hundred

three hundred and eighteen

one thousand four hundred and sixty-five

one thousand and seventy

nine hundred

three hundred and thirty

one thousand four hundred and sixty-five

one thousand one hundred and twenty

one thousand

four hundred and ten

one thousand four hundred and sixty-five

one thousand one hundred and seventy

one thousand and two hundred

four hundred and seventy

one thousand four hundred and sixty-five

one thousand two hundred and eighty-five

one thousand and four hundred

five hundred and thirty

one thousand four hundred and sixty-five

one thousand and four hundred

one thousand and six hundred

six hundred

one thousand seven hundred and twenty-five

one thousand five hundred and twenty-five

one thousand and eight hundred

six hundred and seventy

one thousand seven hundred and twenty-five

one thousand six hundred and fifty

two thousand

seven hundred and sixty

one thousand seven hundred and twenty-five

one thousand eight hundred and eighty-nine