ZHSN(ZAZN) type electric straight through double seat regulating valveDetailed product description：

I. Overview
The ZHSN series electric straight through double seat regulating valve consists of two parts: the DKZ series straight stroke electric actuator and the straight through double seat valve. It is powered by a single-phase AC 220V power supply and receives 0~10mA or 4~20mA DC signals to automatically control the opening of the regulating valve, achieving the connection and adjustment of process parameters such as pressure, flow rate, and liquid level of the fluid in the pipeline.
This product has the characteristics of sensitive action, convenient energy access, and rapid signal transmission. Widely used in automatic control systems for power, metallurgy, chemical, and textile industries.

2、 Main technical parameters and performance indicators
1. Main technical parameters

Nominal diameter DN (mm)

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

Valve seat diameter DN (mm)

twenty-five

thirty-two

forty

fifty

sixty-six

eighty

one hundred

one hundred and twenty-five

one hundred and fifty

two hundred

two hundred and fifty

three hundred

Rated flow coefficient Kv

ten

sixteen

twenty-five

forty

sixty-three

one hundred

one hundred and sixty

two hundred and fifty

four hundred

six hundred and thirty

one thousand

one thousand and six hundred

flow characteristics

Straight line, equal percentage

Nominal pressure PN (MPa)

1.6，4.0，6.4

4.0，6.4

connection type

Flange connection: PN1.6 according to JB79-59 standard; PN4.0 according to JB79-59 standard

Equipped with actuator model

DKZ-310

DKZ-410

DKZ-410

DKZ-510

Extraction thrust (N)

four thousand

six thousand and four hundred

six thousand and four hundred

sixteen thousand

Travel L (mm)

sixteen

twenty-five

forty

sixty

one hundred

Full travel time (S)

twelve point five

twenty

thirty-two

forty

sixty

mode of action

Electric open type (K) is commonly used; Electric switch (B)

input signal

0~10mA  4~20mA  DC

power supply

220V；50~60Hz

Inherent adjustable ratio R

30：1

2. Main technical performance indicators of ZHSN (ZAZN) electric straight through double seat regulating valve

project	Technical performance indicators
Basic error%	≤±5
Return difference%	≤3
Dead zone%	≤5
leakage	0.01% x valve rated capacity
Rated flow coefficient error%	≤±10

3. Valve material and applicable temperature range

Valve body material	Material Grade	Nominal pressure (MPa)	Applicable temperature range (℃)
			Room temperature type	heat dissipation type
cast iron	HT200	one point six	-20~200	-
cast steel	ZG230~450	4.0，6.4	-40~250	-40~450
Cast stainless steel	ZG1Cr18Ni9Ti ZG0Cr18Ni12Mo2Ti	4.0，6.4	-40~250	-60~450

4. Allow pressure difference
Considering the erosion of the valve core and seat by the medium and the noise and vibration caused by high pressure difference, the pressure difference of the electric double seat regulating valve with standard configuration should generally not be affected
If the pressure difference exceeds 1MPa, corresponding process measures should be taken.

5. ZHSN (ZAZN) type electric straight through double seat regulating valve external dimensions

Nominal diameter DN (mm)	A×B	L			H1		H2
		PN1.6	PN4.0	PN6.4	Room temperature type	heat dissipation type
twenty-five thirty-two	230×460	185	one hundred and ninety	two hundred	six hundred and seventy	eight hundred and twenty	one hundred and four
		two hundred	two hundred and ten	two hundred and ten	six hundred and seventy-three	eight hundred and twenty-three	one hundred and seven
forty		two hundred and twenty	two hundred and thirty	two hundred and thirty-five	six hundred and ninety-three	eight hundred and forty-three	one hundred and twenty-six
fifty		two hundred and fifty	two hundred and fifty-five	two hundred and sixty-five	six hundred and ninety-eight	eight hundred and forty-eight	one hundred and thirty-one
sixty-five		two hundred and seventy-five	two hundred and eighty-five	two hundred and ninety-five	seven hundred and ninety-nine	nine hundred and fifty-nine	one hundred and seventy-five
eighty	230×530	three hundred	three hundred and ten	three hundred and twenty	eight hundred and nine	nine hundred and sixty-nine	one hundred and ninety
one hundred		three hundred and fifty	three hundred and fifty-five	three hundred and seventy	eight hundred and twenty-one	nine hundred and eighty-one	two hundred and two
one hundred and twenty-five		four hundred and ten	four hundred and twenty-five	four hundred and forty	eight hundred and seventy-two	one thousand and eighty-seven	two hundred and fifty
one hundred and fifty		four hundred and fifty	four hundred and sixty	four hundred and seventy-five	eight hundred and eighty-two	one thousand and ninety-seven	two hundred and sixty
two hundred	260×630	five hundred and fifty	five hundred and sixty	five hundred and seventy	nine hundred and twenty-four	one thousand one hundred and thirty-nine	three hundred and two
two hundred and fifty		six hundred and seventy	sixty-six	six hundred and seventy	one thousand one hundred and fifty-six	one thousand three hundred and sixty-eight	four hundred and twenty-two
three hundred		seven hundred and forty	seven hundred and eighty-five	eight hundred	one thousand two hundred and fifteen	one thousand four hundred and twenty-seven	four hundred and eighty-four