KD7X42 accumulator type quick closing butterfly valveDetailed product description：

In gas waste heat power generation systems and extraction heating steam turbine systems, the Benxi type valve has been increasingly widely used as a safety guarantee for the system. Its excellent performance, such as rapid closure, resistance to flow, and sealability, makes it suitable for replacing electric globe valves and check valves in the original system design.

Product Usage

This valve is mainly used in parallel units of thermal power plants and gas waste heat generator units, as an emergency shut-off valve to protect system safety.

Product Features:

1. The quick shutdown time can reach 0.5 seconds, and emergency shutdown is safe and reliable.
2. Triple eccentric metal seal, with a lightweight and flexible opening and closing structure, ensuring zero leakage in sealing.
3. At room temperature, a double eccentric soft seal structure can be used as the medium, which has low cost and reliable sealing.
4. Closing the valve end buffer effectively avoids valve inertia impact.
5. Spring can be used to achieve fast closing, and accumulator can be used to achieve fast closing for liquid. The two forms are similar and equally safe and reliable.

Main technical parameters

Nominal meridian (mm)		400~1600
Nominal pressure (MPa)		zero point six	one	one point six	two point five
Test pressure	strength test	zero point nine	one point five	two point four	three point seven five
	Sealing Test	zero point six six	one point one	one point seven six	two point seven five
Work pressure (MPa)		zero point six	one	one point six
Applicable Medium		Water, steam, gas
Applicable temperature (℃)		Soft seal: ≤ 80 ℃; Hard seal: ≤ 425 ℃

Main component materials

Part Name	Material
Valve body, butterfly plate	Grey cast iron, ductile iron, carbon steel
valve stem	stainless steel
Seal ring	stainless steel NBR
filler	NBR

Execution Standard

Design reference	GB/T 12238、JB/T 5299、JB/T 8527
Flange Standard	GB/T 17241、GB/T 9113
Structural length standard	GB/T 12221
pressure test	GB/T 13927

KD7X42/3P spring type quick closing (emergency cut-off) butterfly valve main external connection dimensions Unit: mm

DN	PN	L	L1	L2	L3	L4	Flange connection size
four hundred	zero point six	two hundred and sixteen	five hundred and fifty-six	one thousand four hundred and forty-nine	three hundred and twenty	four hundred and forty	GB/T 17241 GB/T 9113
	one	two hundred and sixteen	five hundred and fifty-six	one thousand four hundred and forty-nine	three hundred and thirty	four hundred and forty
	one point six	two hundred and sixteen	five hundred and fifty-six	one thousand four hundred and forty-nine	three hundred and forty-five	four hundred and forty
four hundred and fifty	zero point six	two hundred and twenty-two	five hundred and fifty-six	one thousand four hundred and forty-nine	three hundred and seventy	four hundred and forty
	one	two hundred and twenty-two	five hundred and fifty-six	one thousand four hundred and forty-nine	three hundred and eighty	four hundred and forty
	one point six	twenty-two	five hundred and eighty	one thousand four hundred and forty-nine	three hundred and ninety-five	four hundred and ninety
five hundred	zero point six	two hundred and twenty-nine	five hundred and eighty	one thousand four hundred and forty-nine	four hundred	four hundred and forty
	one	two hundred and twenty-nine	five hundred and eighty	one thousand four hundred and forty-nine	four hundred and ten	four hundred and ninety
	one point six	two hundred and twenty-nine	five hundred and eighty	one thousand four hundred and forty-nine	four hundred and twenty-five	four hundred and ninety
six hundred	zero point six	two hundred and sixty-seven	five hundred and eighty	one thousand four hundred and forty-nine	four hundred and forty	four hundred and ninety
	one	two hundred and sixty-seven	six hundred and twenty-five	one thousand four hundred and forty-nine	four hundred and sixty	four hundred and ninety
	one point six	two hundred and sixty-seven	six hundred and twenty-five	one thousand eight hundred and twenty	four hundred and seventy	four hundred and ninety
seven hundred	zero point six	two hundred and ninety-two	six hundred and twenty-five	one thousand four hundred and forty-nine	four hundred and thirty-six	four hundred and ninety
	one	two hundred and ninety-two	six hundred and twenty-five	one thousand eight hundred and twenty	five hundred and fifty	four hundred and ninety
	one point six	two hundred and ninety-two	six hundred and twenty-five	one thousand eight hundred and twenty	five hundred and seventy	five hundred and forty-five
eight hundred	zero point six	three hundred and eighteen	six hundred and twenty-five	one thousand eight hundred and twenty	six hundred and twenty-five	five hundred and forty-five
	one	three hundred and eighteen	six hundred and twenty-five	one thousand eight hundred and twenty	six hundred and forty	four hundred and ninety
	one point six	three hundred and eighteen	six hundred and twenty-five	one thousand eight hundred and twenty	six hundred and sixty	five hundred and forty-five
nine hundred	zero point six	three hundred and thirty	six hundred and twenty-five	one thousand eight hundred and twenty	seven hundred	five hundred and forty-five
	one	three hundred and thirty	six hundred and twenty-five	one thousand eight hundred and twenty	seven hundred and ten	five hundred and forty-five
	one point six	three hundred and thirty	six hundred and seventy-five	one thousand eight hundred and twenty	seven hundred and twenty-five	five hundred and forty-five
one thousand	zero point six	four hundred and ten	six hundred and seventy-five	one thousand eight hundred and twenty	seven hundred and sixty	five hundred and forty-five
	one	four hundred and ten	six hundred and seventy-five	two thousand one hundred and eighty	seven hundred and seventy	six hundred and ten
	one point six	four hundred and ten	six hundred and seventy-five	one thousand eight hundred and twenty	seven hundred and ninety	six hundred and ten
one thousand and two hundred	zero point six	four hundred and seventy	six hundred and seventy-five	two thousand one hundred and eighty	eight hundred and seventy-five	six hundred and ten
	one	four hundred and seventy	six hundred and seventy-five	two thousand one hundred and eighty	eight hundred and ninety	six hundred and ten
	one point six	four hundred and seventy	seven hundred and twenty-nine	two thousand one hundred and eighty	nine hundred and fifteen	six hundred and ten
one thousand and four hundred	zero point six	five hundred and thirty	seven hundred and twenty-nine	two thousand one hundred and eighty	one thousand	six hundred and ten
	one	five hundred and thirty	seven hundred and twenty-nine	two thousand one hundred and eighty	one thousand and forty-five	seven hundred and twenty
	one point six	five hundred and thirty	seven hundred and eighty-one	two thousand one hundred and eighty	one thousand and twenty	seven hundred and twenty