Yk43X pilot piston gas pressure reducing valveDetailed product description：

Yk43X pilot piston gas pressure reducing valve is mainly used in gas pipelines, such as air, nitrogen, oxygen, hydrogen, liquefied gas, natural gas and other gases. Yk43X pressure reducing valve belongs to the pilot piston pressure reducing valve. It consists of two parts: the main valve and the pilot valve. The main valve is mainly composed of valve seat, main valve disc, piston, cylinder liner, spring and other parts. The pilot valve is mainly composed of valve seat, valve disc, diaphragm, spring, regulating spring and other parts. By adjusting the spring pressure to set the outlet pressure, using a diaphragm to sense changes in outlet pressure, and driving the piston to adjust the size of the overcurrent area at the throttle position of the main valve through the opening and closing of the pilot valve, the pressure reduction and stabilization function is achieved.

Dimensions of Yk43X air pressure reducing valve (PN6.4-16.0): Unit: mm

Nominal diameter DN	External dimensions
	L		H	Hl
	6.4MPa	10.0/16.0MPa
fifteen	one hundred and eighty	one hundred and eighty	three hundred	one hundred
twenty	one hundred and eighty	two hundred	three hundred and ten	one hundred and five
twenty-five	two hundred	two hundred and twenty	thirty-one	one hundred and twenty
thirty-two	two hundred and twenty	two hundred and thirty	three hundred and ten	one hundred and twenty
forty	two hundred and forty	two hundred and forty	three hundred and thirty-five	one hundred and thirty-five
fifty	two hundred and seventy	three hundred	three hundred and thirty-five	one hundred and thirty-five
sixty-five	three hundred	three hundred and forty	three hundred and forty	one hundred and forty
eighty	three hundred and thirty	three hundred and sixty	three hundred and eighty	one hundred and seventy
one hundred	three hundred and eighty		three hundred and eighty	one hundred and eighty-five
one hundred and twenty-five	four hundred and fifty		four hundred and ninety	two hundred and fifteen
one hundred and fifty	five hundred		four hundred and ninety	two hundred and twenty-five
two hundred	five hundred and fifty		five hundred and thirty-five	two hundred and sixty
two hundred and fifty	six hundred and fifty		five hundred and eighty	three hundred and ten
three hundred	eight hundred		seven hundred and twenty-five	three hundred and fifty-five
three hundred and fifty	eight hundred and fifty		seven hundred and sixty-five	three hundred and ninety-five
four hundred	nine hundred		eight hundred	four hundred and thirty-five
five hundred	nine hundred and fifty		eight hundred and fifty-five	four hundred and ninety-five

Yk43X Air Pressure Reducing Valve Dimensions: (PN1.6-4.0) Unit: mm

Nominal diameter DN	External dimensions
	L		H	Hl
	1.6/2.5MPa	4.0MPa
fifteen	one hundred and sixty	one hundred and eighty	two hundred and ninety	ninety
twenty	one hundred and sixty	one hundred and eighty	three hundred	ninety-eight
twenty-five	one hundred and eighty	two hundred	three hundred	one hundred and ten
thirty-two	two hundred	two hundred and twenty	three hundred	one hundred and ten
forty	two hundred and twenty	two hundred and forty	three hundred and twenty	one hundred and twenty-five
fifty	two hundred and fifty	two hundred and seventy	three hundred and twenty	one hundred and twenty-five
sixty-five	two hundred and eighty	three hundred	three hundred and twenty-five	one hundred and thirty
eighty	three hundred and ten	three hundred and thirty	three hundred and sixty-five	one hundred and sixty
one hundred	three hundred and fifty	three hundred and eighty	three hundred and sixty-five	one hundred and seventy
one hundred and twenty-five	four hundred	four hundred and fifty	four hundred and seventy-five	two hundred
one hundred and fifty	four hundred and fifty	five hundred	four hundred and seventy-five	two hundred and ten
two hundred	five hundred	five hundred and fifty	five hundred and fifteen	two hundred and forty
two hundred and fifty	six hundred and fifty		five hundred and sixty	two hundred and ninety
three hundred	eight hundred		seven hundred and five	three hundred and thirty-five
three hundred and fifty	eight hundred and fifty		seven hundred and forty-five	three hundred and seventy-five
four hundred	nine hundred		seven hundred and eighty	four hundred and five
four hundred and fifty	nine hundred		seven hundred and thirty	four hundred and fifty-five
five hundred	nine hundred and fifty		eight hundred and thirty-five	four hundred and sixty-five

Connection type: ※ Flange type: RF FM RJ ※ Execution standard: JB79 GB9113 ANSI B16.5

Ordering Notice:
Product model nominal pressure nominal diameter connection flange standard rated flow coefficient Cv inlet pressure regulation range working medium and medium temperature

Flow coefficient (Cv)

DN

fifteen

twenty

twenty-five

thirty-two

forty

fifty

sixty-five

eighty

one hundred

one hundred and twenty-five

one hundred and fifty

two hundred

two hundred and fifty

three hundred

three hundred and fifty

four hundred

five hundred

Cv

one

two point five

four

six point five

nine

sixteen

twenty-five

thirty-six

sixty-four

one hundred

one hundred and forty

two hundred and fifty

four hundred

five hundred and seventy

seven hundred and eighty

one thousand and twenty

one thousand and five hundred

Yk43X air pressure reducing valve main component material: (*: material used for oxygen medium)

Part Name	Part material
Valve body, valve cover, bottom cover	WCB/FCB＊
Valve seat disc	2Cr13/304＊
cylinder liner	2Cr13/25 (hard chrome plating)/304 *
piston	2Cr13/Copper Alloy/Copper Alloy *
piston ring	Alloy cast iron/para polystyrene *
Guide valve seat and guide valve stem	2Cr13/304＊
Diaphragm	1Cr18Ni9Ti
Main valve guide valve spring	50CrVA
Adjusting spring	60Si2Mn
Sealing gasket (X/F model)	Rubber/PTFE
Valve body and valve cover	25/304＊

Main technical parameters and performance indicators of YK43X air pressure reducing valve: (*: Shell test does not include diaphragm and top cover)

Nominal pressure (Mpa)	one point six	two point five	four	six point four	ten	sixteen
Shell test pressure (Mpa) *	two point four	three point seven five	six	nine point six	fifteen	twenty-four
Sealing test pressure (Mpa)	one point six	two point five	four	six point four	ten	sixteen
Maximum import pressure (Mpa)	one point six	two point five	four	six point four	ten	sixteen
Export pressure range (Mpa)	0.1-1.0	0.1-1.6	0.1-2.5	0.5-3.5	0.5-3.5	0.5-4.5
Pressure characteristic deviation (Mpa) △ P2P	GB12246-1989
Flow characteristic deviation (Mpa) P2G	GB12246-1989
Minimum pressure difference (Mpa)	zero point one five	zero point one five	zero point two	zero point four	zero point eight	one
leakage volume	X/F (polytetrafluoroethylene/rubber): O Y (hard seal): GB12245-1989