FF4-250 GL PAH
High pressure switch with plasic plunger
Throttle is fitted as standard on these switch. This must be removed for use with viscous medium
adapted for water, oils and air
GL - approval (Germanischer Lloyd) with a marine-type cable gland and additional grounding clap as standard
| Part number | |
| Upper switchpoint |
30 .... 250 bar |
| Lower switchpoint | 14 .... 226 bar |
|
Smallest difference lower upper / lower end of range |
12 / 24 bar |
| Max.operating pressure | 400 bar |
| Max. test pressure | 500 bar |
| Standard setting |
100 / 200 bar |
| Connector | G 3/8" stainless steel |
| weight | ca. 0,6 kg |
| Ambient temperature range | -20 .... +70°C |
| Perm. medium temperature | 0 .... +70°C |
| Protection acc.too DIN 40 050/IEC 529 with rubber grommet | IP 54 (Standard) |
| Protection acc.too DIN 40 050/IEC 529 with cable glands M20 | IP 65 |
| Rated operating current at AC1 230V | 16A |
| Rated operating current at AC1 400V | 10A |
| Rated operating current at AC15 230V | 6A |
| Rated operating current at DC13 230V | 0,1A |
| Permissible motor power 1 230V | 0,55 kW |
The pressure at port pressure of the monitored medium is - depending on the pressure range - on a flat membrane and operated via a lever system and springs on a cascade switch. It guarantees flutterfree switching. The switches operate independent of the position.
If there is no pressure on the membrane the contact 1-2 is closed. Pump or compressor may start.
If the set upper switching point is reached, contact 1-2 opens and contact 1-4 closes. Pump or compressor will be switched off.
Contact 1-2 will only be restored when the pressure on the membrane has dropped to the set lower switching point. The upper and lower switching point can be adjusted with a screwdriver independently. For each switching point, a scale exists.
Image: FF 4-32 GL DAH
| Table for Medium-compatibility | |||||
|---|---|---|---|---|---|
|
Medium name
|
Chemical Formula
|
Stainless steel
|
Perbunan
|
Viton
|
Plastc
|
| Acetylene | CH3COCH3 |
x
|
|
|
|
| Acetylen | HC = CH |
x
|
x
|
x
|
x
|
| Air | - |
x
|
x
|
x
|
x
|
| Benzene | Sulphur-free |
x
|
|
x
|
|
| Butane | C4H10 |
x
|
x
|
x
|
x
|
| Butyl acetate | CH3COOC4H9 |
x
|
|
|
|
| Butyl alcohol | CH3-CH2-CH2-CH2-OH |
x
|
|
|
|
| Carbon dioxide | CO2 |
x
|
x
|
x
|
x
|
| Carbonic acid | H2CO3 |
x
|
x
|
x
|
x
|
| Chlorine | CI2 |
|
|
x
|
|
| Crude oil | - |
x
|
x
|
x
|
x
|
| Diesel oil | - |
x
|
x
|
x
|
x
|
| Ethyl acetate | CH3OOOC2H5 |
x
|
x
|
x
|
x
|
| Fuels | Leaded petrol |
x
|
x
|
x
|
x
|
| Fuels | Benzene |
x
|
|
x
|
|
| Glycerine | CH2OH-CHOH-CH2OH |
x
|
x
|
x
|
x
|
| Glycol | CH2OH-CH2OH |
x
|
x
|
x
|
x
|
| Heating oil | - |
x
|
x
|
x
|
x
|
| Hydrogen | H2 |
x
|
x
|
|
x
|
| Inert gases | - |
x
|
|
|
|
| Methanol | CH3OH |
x
|
|
|
|
| Methyl chloride | CH3CI |
x
|
|
|
|
| Natural gas | - |
x
|
x
|
x
|
x
|
| Nitrogen | N2 |
x
|
x
|
x
|
x
|
| Oils | Mineral |
x
|
x
|
x
|
x
|
| Oils | Vagetable |
x
|
x
|
x
|
|
| Oxygen | O2 |
x
|
|
x
|
|
| Ozone | - |
x
|
|
x
|
|
|
Perchlorethylene |
CCI2=CCL2 |
x
|
|
x
|
|
| Petrol | alle Sorten |
x
|
|
x
|
|
| Phenolic acid | C6H5(OH) |
x
|
|
|
|
| Sulphar dioxide | SO2 |
x
|
|
|
|
| Toluene (Metyl benzene) | C6H5CH3 |
x
|
|
x
|
|
| Trichlorethene | CHCI=CCI2 |
x
|
|
x
|
|
| Water | Steam/vapor |
x
|
x
|
x
|
|
| Water | Destilled, de-aerated |
x
|
x
|
x
|
x
|
| Water | Sea water |
x
|
x
|
|
x
|
| Xylene | C6H4(CH3)2 |
x
|
|
x
|
|