ZSNC Pneumatic piston cut-off valveDetailed product description：

ZSNC type pneumatic piston cut-off valve consists of a pneumatic piston actuator and a cut-off mechanism. According to the sealing surface material of the valve core, it can be divided into hard seal and soft seal; According to the structure of the valve core, it can be divided into single guide flat plate type and single guide balanced type. It has the characteristics of simple structure, reliable action, tight cutting, and fast closing and opening. Suitable for gas and liquid media without particles or impurities, requiring fast and tight closure and rapid venting in automatic control systems. Technical parameters and performance indicators

Main technical parameters of the cutting mechanism

Nominal diameter mm

twenty

twenty-five

forty

fifty

sixty-five

eighty

one hundred

one hundred and fifty

two hundred

two hundred and fifty

three hundred

Valve seat diameter mm

twenty

twenty-five

thirty-two

forty

fifty

sixty-five

eighty

one hundred

one hundred and twenty-five

one hundred and fifty

two hundred

Rated flow coefficient Kv

six point five

ten

fifteen

twenty-five

forty

sixty-five

one hundred

one hundred and fifty

two hundred and sixty

three hundred and fifty

five hundred and forty

Nominal pressure MPa

1.6 ； 4.0 ； six point four

Travel distance mm

ten

sixteen

twenty-five

thirty

forty

sixty

flow characteristics

Hurry up

Medium temperature ℃

Soft seal: -40~150 (normal temperature type); Hard seal: -40~200 (normal temperature type); -40-450 (medium temperature type)

Flange size and type

PN16 according to JB79-59; PN4.0、 64 according to JB/T79.2-94 concave

Valve body material

ZG230-450 ； ZG1Cr18Ni9Ti； ZGOCr18Ni12Mo2Ti

Valve seat and valve core material

1Cr18Ni9 ； 0Cr18Ni12Mo2Ti

Upper valve cover type

Ordinary type (constant temperature type); Hot plate (medium temperature type)

Can be equipped with accessories

Handwheel mechanism, air filter pressure reducer, solenoid valve, signal feedback device, etc

Note: GB, ANSI, JPI, DIN and other flange structural types can be provided, and flange spacing can be determined according to user needs.

Matching relationship between the main technical parameters of the executing mechanism and the cutting mechanism

Nominal diameter mm	Model of actuator		Cylinder diameter mm		Travel distance mm	inlet hole thread		remark
	Room temperature type	Medium temperature type	Room temperature type	Medium temperature type		Room temperature type	Medium temperature type
twenty	ZSPA-1、ZSPB-1	ZSPA-1、ZSPB-1 ZSN-1	one hundred and fifty	one hundred and fifty	ten	M16×1.5	M16×1.5	ZSP: Single acting ZSN: Double acting
twenty-five
forty		ZSPA-2、ZSPB-2 ZSN-1		two hundred	sixteen
fifty
sixty-five	ZSPA-2、ZSPB-2	ZSPA-3、ZSPB-3 ZSN-2	two hundred	three hundred	twenty-five		M20×1.5
eighty
one hundred					thirty
one hundred and fifty	ZSPA-3、ZSPB-3	ZSPA-4、ZSPB-4 ZSN-3	three hundred	four hundred	forty	M20×1.5	M24×2
two hundred					sixty

Performance indicators of ZSNC pneumatic piston cut-off valve

Nominal diameter mm

twenty

twenty-five

forty

fifty

sixty-five

eighty

one hundred

one hundred and fifty

two hundred

Valve seat diameter mm

thirty-two

forty

fifty

sixty-five

eighty

one hundred

one hundred and twenty-five

one hundred and fifty

two hundred

Leakage rate of soft seal

Water test △P=△Pmax ml/min

0

Gas test △P=0.35MPa Bubble count/min

one

one

two

three

four

six

eleven

eighteen

twenty-seven

forty-five

Leakage rate of hard seal

Water test MPa

four

three

ml/min

zero point two four

zero point three zero

zero point three eight

zero point four eight

zero point six zero

zero point seven eight

zero point nine six

one point two

one point one two five

one point three five

one point eight

Gas test △ P=0.35MPa ml/min

twenty-three point three

twenty-nine point two

thirty-seven point three

forty-six point seven

fifty-eight

seventy-five point eight

ninety-three point three

one hundred and sixteen point seven

one hundred and forty-five point eight

one hundred and seventy-five

two hundred and thirty-three point three

Cut off time s

zero point five

one

one point five

two

three

four

Rated travel deviation%

+6

Allowable pressure difference

Nominal diameter mm

twenty

twenty-five

forty

fifty

sixty-five

eighty

one hundred

one hundred and fifty

two hundred

Cylinder diameter mm

one hundred and fifty

two hundred

three hundred

four hundred

Gas source pressure KPa

five hundred

Allowable pressure difference

complete machine Airtight type

Flow open

four

four

two point six

two point two

three point eight

two point six

two

one point nine five

one point five nine

Flow off

four

four

four

three point one

three point one

two point one

one point six

two

one point six three

complete machine Air opening type

Flow open

four

three

two point one

one point seven

one point seven

one point one

zero point nine

zero point five two

zero point four three

Flow off

four

four

one

four

four

three point six

two point seven

three point four

two point two

Dimensions mm

Nominal diameter DN			twenty	twenty-five	forty	fifty	sixty-five	eighty	one hundred	one hundred and fifty	two hundred
L	PN MPa	one point six	one hundred and ninety-four	one hundred and ninety-seven	two hundred and thirty-five	two hundred and sixty-seven	two hundred and ninety-two	three hundred and seventeen	three hundred and sixty-eight	five hundred	six hundred and thirty-five
		four									six hundred and fifty
		six point four	two hundred and six	two hundred and ten	two hundred and fifty-one	two hundred and eighty-six	three hundred and eleven	three hundred and thirty-seven	three hundred and ninety-four	five hundred and twenty	six hundred and fifty
H			sixty-five	seventy	eighty-five	ninety	one hundred	one hundred and five	one hundred and twenty-five	one hundred and seventy	two hundred and five
without handwheel	H1	Room temperature type	four hundred and forty-five	four hundred and fifty-five	four hundred and eighty-five	four hundred and eighty-five	six hundred and five	six hundred and five	six hundred and twenty	nine hundred and sixty-two	nine hundred and eighty-eight
		Medium temperature type	five hundred and ninety-six	six hundred and six	six hundred and thirty-six	six hundred and thirty-six	seven hundred and seventy	seven hundred and seventy	seven hundred and eighty-five	one thousand one hundred and seventy-eight	one thousand two hundred and twenty-six
with handwheel	H1	Room temperature type	six hundred and thirty	six hundred and forty	six hundred and seventy	six hundred and seventy	seven hundred and ninety	seven hundred and ninety	eight hundred and five	one thousand and eighty-seven	one thousand one hundred and thirteen
		Medium temperature type	seven hundred and eighty-one	seven hundred and ninety-one	eight hundred and twenty-one	eight hundred and twenty-one	nine hundred and fifty-five	nine hundred and fifty-five	nine hundred and seventy	one thousand three hundred and three	one thousand three hundred and fifty-one
	H2		one hundred and sixty	one hundred and sixty	one hundred and sixty	one hundred and sixty	one hundred and sixty	one hundred and sixty	two hundred and seventy	two hundred and seventy	two hundred and seventy
	H3		two hundred and twenty	two hundred and twenty	two hundred and twenty	two hundred and twenty	two hundred and twenty	two hundred and twenty	three hundred and ninety	three hundred and ninety	three hundred and ninety