FDF-MB series solenoid valveDetailed product description：

Overview
FDF type solenoid valves are used in fluoride liquid pipelines, suction pipelines, and hot steam pipelines, and can be widely used in refrigeration, freezing, and air conditioning units.
characteristic
Electromagnetic valves can be divided into direct acting and pilot operated (servo) structures.
We can provide normally closed (NC) and normally open (NO) types.
There are various AC and DC voltage coils to choose from.
Suitable for HCFCs, HFC refrigerants, and compatible lubricating oils (except R717).
Pilot operated (main valve port ≥ 5mm) working pressure range: Direct acting (valve port ≤ 3mm) working pressure range:
Communication: 0.05-21bar Communication: 0-21bar
DC: 0.05-17bar DC: 0-17bar
Maximum working pressure: 30 bar.
The temperature range for using the working fluid is -25 ℃ to 105 ℃.
FDF25M and above solenoid valves can also be provided with flange installation types.
UL/CUL certification is available.

Working principle of FDF-MB series solenoid valve

The FDF-B and FDF-Z series are direct acting solenoid valves.
Working principle of normally closed (NC) solenoid valve: When the coil is energized, the coil generates a magnetic field, and the valve core is attracted by the magnetic field force, and the valve opens. When the coil is powered off,
The magnetic field disappears, and the valve core decreases under the action of its own weight and the force of the reset spring, causing the valve to close.
The FDF-M series is a servo solenoid valve.
Working principle of normally closed (NC) type: When the coil is energized, a magnetic field is generated to attract the valve core of the pilot valve, open the pilot valve, and the pilot valve is connected to the main valve membrane of the valve
A pressure difference is formed between the top and bottom of the chip, which pushes the main valve to open. After the main valve is opened, the diaphragm of the main valve will remain open due to the flow of the medium fluid. When the coil is powered off,
The valve core closes the pilot valve due to its own weight and spring force, and the medium enters the upper part of the diaphragm through the throttle hole. The pressure above and below the diaphragm is balanced, and thus the main valve diaphragm is closed
Lower, close the main valve.
The working principle of normally open (NO) solenoid valve is opposite to that of normally closed type.

Model and Parameters Technical data

Model Model

connection size Connection size

connection method Form of connect

Valve opening pressure difference (bar) Opening diff pressure

Flow rate (water) Flow rate Kv(m3/h)

working medium Available medium

Medium temperature ℃ Temperature of media

Type of power supply Rated power

Overall dimensions Dimensions (mm)

Normally closed (NC)

Normally open (NO)

In

mm

AC

DC

long

wide

high

long

wide

high

FDF3BJ

1/4

six

Welding ODF

normally closed Communication: 0.05-21 DC: 0.05-17 Normally Open Communication: 0.05-18 DC: 0.05-15

zero point two seven

CFC HCFC HFC air clean water Oil with viscosity ≤ 4 ° E

-25—105

twenty-four thirty-six one hundred and ten two hundred and twenty

twelve twenty-four one hundred and ten two hundred and twenty

one hundred and seventeen

thirty-one

seventy-six

5/16

eight

3/8

ten

FDF6MJ

5/16

eight

zero point four

one hundred and twenty-seven

forty-five

eighty-eight

one hundred and twenty-seven

forty-five

ninety-three

FDF8MJ

3/8

ten

zero point eight

1/2

twelve

zero point eight

FDF10MJ

1/2

twelve

one point nine

one hundred and fifty-one

forty-five

eighty-six

one hundred and fifty-one

forty-five

ninety-one

5/8

sixteen

one point nine

FDF13MJ

5/8

sixteen

three

one hundred and seventy-four

fifty-two

ninety-eight

one hundred and seventy-four

fifty-two

one hundred and fifteen

3/4

nineteen

three

7/8

twenty-two

three

FDF16M1

3/4

nineteen

four point five

one hundred and ninety

fifty-eight

ninety-eight

one hundred and ninety

fifty-eight

one hundred and fifteen

FDF19M1

7/8

twenty-two

four point five

FDF19M2

7/8

twenty-two

five

two hundred and thirty

seventy-two

one hundred and eight

two hundred and thirty

seventy-two

one hundred and twenty-five

FDF19M3

11/8

thirty-five

six

two hundred and fifty

seventy-two

one hundred and eight

two hundred and fifty

seventy-two

one hundred and twenty-five

FDF19M4

9/8

twenty-eight

six

FDF25MJ

9/8

twenty-eight

nine point eight

two hundred and thirty-six

seventy-two

one hundred and sixteen

two hundred and thirty-six

seventy-two

one hundred and thirty-three

11/8

thirty-five

nine point eight

FDF32MJ

11/8

thirty-five

fifteen

two hundred and eighty-one

eighty-six

one hundred and thirty

two hundred and eighty-one

eighty-six

one hundred and forty-seven

13/8

forty-two

fifteen

FDF40M

13/8

forty-two

normally closed Communication: 0.3-21 DC: 0.3-17 Normally Open Communication: 0.3-18 DC: 0.3-15

twenty-five

three hundred and twenty-two

one hundred and twenty-six

one hundred and fifty-eight

three hundred and twenty-two

one hundred and twenty-six

one hundred and seventy-one

17/8

fifty-four

FDF25MA

thirty-three

flange Flange

normally closed Communication: 0.05-21 DC: 0.05-17 Normally Open Communication: 0.05-18 DC: 0.05-15

nine point eight

one hundred and fifty-two

one hundred and twelve

one hundred and sixty-five

one hundred and fifty-two

one hundred and twelve

one hundred and eighty-two

FDF25MF

thirty-three

nine point eight

one hundred and sixty-two

eighty-six

one hundred and seventy-five

one hundred and sixty-two

eighty-six

one hundred and ninety-two

FDF32MA

thirty-eight point eight

fifteen

one hundred and sixty-two

one hundred and twelve

one hundred and seventy-five

one hundred and sixty-two

one hundred and twelve

one hundred and ninety-two

FDF32MF

thirty-eight point eight

fifteen

one hundred and fifty-six

eighty-six

one hundred and seventy-eight

one hundred and fifty-six

eighty-six

one hundred and ninety-five

FDF3B

six

thread SAE

zero point two seven

sixty

thirty-one

seventy-six

FDF6MB

eight

zero point four

eighty-five

forty-five

eighty-five

eighty-five

forty-five

ninety

FDF8MB

ten

zero point four

FDF10MBJ

twelve

zero point eight

eighty-seven

forty-five

eighty-five

eighty-seven

forty-five

ninety

FDF13MBJ

sixteen

one point nine

one hundred and seven

fifty-two

ninety-eight

one hundred and seven

fifty-two

one hundred and fifteen

FDF16MBJ

nineteen

four point five

one hundred and twenty-eight

seventy-two

one hundred and eight

one hundred and twenty-eight

seventy-two

one hundred and twenty-five

FDF19MBJ

twenty-two

six

one hundred and twenty-eight

seventy-two

one hundred and eight

one hundred and twenty-eight

seventy-two

one hundred and twenty-five

FDF2Z

ODM5/8

Right angle welding Right-angle welding

Communication: 0-25

zero point one six

sixty-three point five

thirty

one hundred and thirty-two

FDF3Z

ODM5/8

zero point two seven

sixty-three point five

thirty

eighty-five

Note: "E" after the model indicates a manual lever, "F" indicates a flange, "A" indicates a waist flange, "J" indicates an improved version, "B" indicates a threaded connection, "K" indicates a normally open solenoid valve, and "Z" indicates a right angle.  
Note: If you need other working characteristics and specifications of products, please contact our company.  
The Kv value is the water flow rate when the valve passes through a pressure drop of 1 bar before and after a pressure of ρ=1000kg/m3.  

The nominal cooling capacity of liquid and suction is: The nominal cooling capacity of hot gas operating conditions are:
Evaporation temperature te=-10 ℃ Condensation temperature tc=+40 ℃ Liquid refrigerant subcooling degree Δ tsub=4K
The temperature of the liquid in front of the valve is t1=+25 ℃, and the pressure drop across the valve is Δ P=0.8bar
After the pressure drop of the solenoid valve Δ P=0.15 bar, the temperature of the hot steam th=+65 ℃

Install
The FDF-MB series solenoid valve should be installed vertically on a horizontal pipeline, and the direction of medium flow should be consistent with the arrow direction shown on the solenoid valve.
The input voltage for coil operation must be consistent with the rated voltage indicated on the coil. Never allow the solenoid coil to be removed from the valve when it is powered on, in order to prevent the coil from burning out.
When welding electromagnetic valve welded pipes with system pipes, the following points must be noted:
Remove the solenoid coil from the valve and wrap it around the valve body with a damp cloth or cotton yarn to protect it from overheating and damaging the valve components during welding.
Please pay attention to the direction of the welding gun flame during welding.
It is best to use high silver welding rods for welding.
The solenoid valve with a manual lever must first rotate the manual lever to open the valve, and then conduct a system air tightness test to avoid damaging the diaphragm.