SZJHP,SZJHM Precision small pneumatic thin film straight through single seat sleeve regulating valveDetailed product description：

SZJHP and SZJHM precision small pneumatic thin film straight through single seat and sleeve regulating valves adopt a top guide structure and are equipped with multiple spring actuators. It has the advantages of compact structure, light weight, sensitive action, S-shaped fluid channel, low pressure drop loss, large valve capacity, precise flow characteristics, and easy disassembly and assembly. Widely used for precise control of process parameters such as pressure, flow rate, and liquid level in gases, liquids, and other media to maintain them at given values. Especially suitable for working environments where small leakage is allowed and the pressure difference before and after the valve is not significant.

SZJHP, SZJHM precision small pneumatic thin film straight through single seat sleeve regulating valves come in various varieties such as standard type, regulating cut-off type, corrugated pipe sealing type, jacket insulation type, etc.  
The nominal pressure rating of the product includes PN16, 40, and 64; The nominal diameter range is DN20-300. Suitable for liquid temperatures ranging from -200 ℃ to+560 ℃ in various grades. The leakage standard has level IV or VI, and the flow characteristics are linear or equal percentage. There are a variety of character specifications to choose from.

Main component materials
Valve body and cover: HT200, ZG230-450, ZG1Cr18Ni9Ti
Valve core and seat: 1Cr18Ni9Ti, Si Ti Lai alloy overlay welding
Soft seal valve core: reinforced polytetrafluoroethylene
Packing: PTFE, flexible graphite, stainless steel corrugated pipe
Gasket: Rubber asbestos board, 1Cr18Ni9Ti, asbestos wrapped gasket
Membrane cover: A3
Corrugated film: Nitrile rubber clip reinforced polyester fabric
Spring: 60Si2Mn
Valve stem and push rod: 2Cr13, 1Cr18Ni9Ti
Lining: 2Cr13

Main technical parameters

Nominal diameter DN (mm) (Valve core diameter dn)

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

(10)

(12)

(15)

(20)

Rated flow coefficient Kv

straight line

one point eight

two point eight

four point four

six point nine

eleven

seventeen point six

twenty-seven point five

forty-four

sixty-nine

one hundred and ten

one hundred and seventy-six

two hundred and seventy-five

four hundred and forty

six hundred and ninety

one thousand and one hundred

one thousand seven hundred and sixty

equal percentage

one point six

two point five

four

six point three

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

Rated stroke (mm)

ten

sixteen

twenty-five

forty

sixty

one hundred

Effective area of membrane Ae (cm2)

two hundred and eighty

four hundred

six hundred

one thousand

one thousand and six hundred

Signal range Pr (KPa)

20-100, 40-200

Gas source pressure Ps (KPa)

0.14～0.4

Inherent flow characteristics

Straight line, equal percentage

Inherent adjustable ratio R

50：1

Allowable leakage amount

Hard valve seat: Grade IV, soft valve seat: Grade VI

Nominal pressure PN (MPa)

1.6, 4.0, 6.4

Working temperature t （℃）

Room temperature type

-20-200, -40 to 250, -60 to 250

heat dissipation type

-40-450, -60-450

high-temperature type

450~560

Low temperature type

-60-100, -100 to -200, -200 to -250

The performance indicators of this product comply with GB/T4213-92.