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Solenoid valves Danfoss Type EV222B

 

 

Kitoma Indonesia - menyediakan Solenoid valves with isolating diaphragm 2/2-way servo-operated Type EV222B


solenoid valves EV222B is an indirect servo-operated solenoid valve programme for use in connection with contaminated or aggressive media.
Valve body in stainless steel, isolating diaphragm protecting the solenoid system against impurities, build in pilot filter, adjustable closing time, enclosures up to IP67 ensure a reliable and satisfaction function.

  • 2/2-way
  • servo-operated
  • isolating diaphragm
  • DN 15 - DN 50
  • Ambient temperature: +60°C
  • Stainless steel valve body
  • NC versions only

 

Features solenoid valves EV222B

  • The isolating diaphragm design ensures that no fl uid enters the armature area, which gives the following advantages:
    • the valve is resistant to aggressive fl uids, to impurities in the fl uid and to to calcareous and other scale deposits
  • Diff erential pressure: Up to 10 bar
  • Viscosity: Up to 50 cSt
  • Ambient temperature: Up to +60°C
  • Coil enclosure: Up to IP 67
  • Thread connection: From G ½ to G 2
  • Water hammer damped
  • Built in fi lter for protection of pilot system

 

Technical data

 

Type
 EV222B
Installation
Optional, but vertical solenoid system is recommended
Nominal pressure PN10
Differential pressure 0.3 to 10 bar
Max. test pressure 16 bar
Ambient temperature Max. 60oC (depending on coil type, see below)
Medium temperature 0 to +100oC (Water +60oC)
Viscosity Max. 50cSt
Materials Valve body: Stainless Steel, W.no. 1.4581 / AISI 318 1)
Flange for isolating diaphragm: Stainless Steel, W.no. 1.4581 / AISI 318 1)
Diaphragm plate: Stainless Steel, W.no. 1.4301 / AISI 304 1)
Isolating diaphragm: FKM
Main diaphragm: FKM
O-rings: FKM
Closing spring: Stainless Steel, W.no. 1.4310 / AISI 301 1)
Fluid above isolating diaphragm: Silicone oil

1) W. no. according to DIN 17440

 

Function

 

EV222B_Function.jpg2/2-way servo-operated
When voltage is applied to the coil (8), the armature (2) with the isolating diaphragm (3) is lifted clear of the pilot orifice (4) and the diaphragm (5) is lifted by the fluid pressure - the main orifice (6) opens.

When voltage is disconnected the isolating diaphragm (3) is pressed down against the pilot orifice (4) by the armature spring (1) and pressure is built up above the diaphragm (5) via the equalizing orifi ce (7). The main orifi ce is closed by the fl uid pressure and the spring (9).The isolating diaphragm keeps the medium away from the actuator.

The space above the isolating diaphragm is fi lled up with silicone oil.

 

 

 

  1. Armature spring
  2. Armature
  3. Isolating diaphragm
  4. Pilot orifi ce
  5. Diaphragm
  6. Main orifi ce
  7. Equalizing orifi ce
  8. Coil

 

 

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