- Guangxi COHO Electromechanical Co. Ltd..
- China Manufacturer with main products:Stop valves ,Danfoss valves ,EMERSON valves ,Servo Valves ,Pressure Sensor ,Level Switch ,Check Valves ,Motor Operated Valves ,Liquid Level Sensor ,Liquid Level Regulating Valves ,Solenoid Valves ,Electric Expansion Valves
Home > Products > Danfoss valves > Liquid level regulating valves Types PMFL200 and PMFL300 Danfoss valves
Liquid level regulating valves Types PMFL200 and PMFL300 Danfoss valves
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- Guangzhou
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Product Details
Brand Name: | Danfoss | Place of Origin: | Denmark | Model Number: | PMFL200,PMFL300 |
Material: | Casting | Application: | General | Structure: | Regulating |
Standard or Nonstandard: | Standard | Pressure: | Medium Pressure | Power: | Solenoid |
Port Size: | 32-76mm | Media: | Gas | Temperature of Media: | Normal Temperature |
Product Description
Liquid level regulating valves Types PMFL200 and PMFL300 Danfoss valves Function
When the liquid level inside the float drops,the float orifice opens. This relieves the higher pressure, ps, acting on the servo piston to the low pressure side causing the PMFL to open.Variations in liquid level will result in variations
The setting spindle, pos. 60, has not been set from factory. It is imperative that the setting spindle is adjusted before the valve is put into operation. The outer spring, pos. 23, is preset and the inner spring, pos. 43, is adjusted when in pressure over the piston and variation in the
amount of liquid injected. It is important to choose the correct spring set when designing the plant. The spring set should be selected from the
table below:turning the spindle. The following tables shows the adjustment of the inner spring in number of turns of the spindle as a function of valve size, spring type and pressure difference.
Liquid level regulating valves Types PMFL200 and PMFL300 Danfoss valves Design
The values for spindle turns are an indication for an initial setting only. If a position indicator is used, a more precise modulation can be achieved when fine tuning the valve setting. If the PMFL is not opening fully, the spring tension must be reduced. If the PMFL is operating in a ON / OFF function, the spring tension should be increased.The condenser pressure will have an effect on the fine tuning and large variations in condensing pressure might call for readjustment.The subcooling is measured just before the PMFL and the pressure difference is for the valve only
excluding piping and armatures.The PMFL can be used together with SV 4 as a pilot valve.The final choice of orifice may vary depending on refrigerant and pressure levels. Smaller pressure levels needs a bigger orifice. Pressure difference levels below 3 bar (43 psi) need SV 4 – 6
with Ø3 mm orifice.PMFL function example SV 4 can be used for PMFL low pressure control system. The float must be connected as shown.Note: Only one inlet connection possible for SV 4. SV floats for PMFL The orifices determines the K v (C v ) value of the pilot and the following table can be used as an initial selection guide.
Liquid level regulating valves Types PMFL200 and PMFL300 Danfoss valves Ordering model
Valve type
Code no.
EN GJS 400-18-LT
PMFL 80-1 027F3054
PMFL 80-2 027F3055
PMFL 80-3 027F3056
PMFL 80-4 027F3057
PMFL 80-5 027F3058
PMFL 80-6 027F3059
PMFL 80-7 027F3060
PMFL 125 027F3061
PMFL 200 027F3062
PMFL 300 027F3063
Valve type
Code no.
EN GJS 400-18-LT
PMFH 80-2 027F3065
PMFH 80-3 027F3066
PMFH 80-4 027F3067
PMFH 80-5 027F3068
PMFH 80-6 027F3069
PMFH 80-7 027F3070
PMFH 125 027F3071
PMFH 200 027F3072
PMFH 300 027F3073
PMFH 500 027F3074
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- Guangxi COHO Electromechanical Co. Ltd..
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