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N.O. GAS SOLENOID VALVES WITH MANUAL RE-SET

GRA ...

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APPLICATION

Without power they are open; when powered they are closed. They have to be re-opened manually and remain open if not powered..

For replacement coils please click here.

 

FEATURES

  • Constructed to DIN standards DIN.

  • Protection IP 54.

  • Aluminium body.

  • Working temperature: ­15 ... +60 °C.

  • Mounted with coil axis within 90° of vertical.

      Power supply   Flow rate m3/h(2)  
Code   DN Volt. W P.max(1) mbar 0.5 mbar 1 mbar Data sheet
  screwed  
GRA 815   1/2" 230 V ~ 16 500 2.8 4 G 931
GRA 415   1/2" 24 V ~/­ 12 500 2.8 4
GRA 215   1/2" 12 V ~/­ 12 500 2.8 4
 
GRA 820   3/4" 230 V ~ 16 500 5.5 8 G 931
GRA 420   3/4" 24 V ~/­ 12 500 5.5 8
GRA 220   3/4" 12 V ~/­ 12 500 5.5 8
 
GRA 825   1" 230 V ~ 16 500 8.4 12 G 931
GRA 425   1" 24 V ~/­ 12 500 8.4 12
GRA 225   1" 12 V ~/­ 12 500 8.4 12
 
GRA 832   1"1/4 230 V ~ 16 500 14 20 G 931
GRA 432   1"1/4 24 V ~/­ 12 500 14 20
GRA 232   1"1/4 12 V ~/­ 12 500 14 20
 
GRA 840   1"1/2 230 V ~ 16 500 19 27 G 931
GRA 440   1"1/2 24 V ~/­ 12 500 19 27
GRA 240   1"1/2 12 V ~/­ 12 500 19 27
 
GRA 850   2" 230 V ~ 16 500 28 40 G 931
GRA 450   2" 24 V ~/­ 12 500 28 40
GRA 250   2" 12 V ~/­ 12 500 28 40
 
  flanged  
GRA 865   65 (4 fori) 230 V ~ 19 500 55 80 G 931
GRA 465   65 (4 fori) 24 V ~/­ 16 500 55 80
GRA 265   65 (4 fori) 12 V ~/­ 16 500 55 80
 
GRA 880   80 (8 fori) 230 V ~ 19 500 70 100 G 931
GRA 480   80 (8 fori) 24 V ~/­ 16 500 70 100
GRA 280   80 (8 fori) 12 V ~/­ 16 500 70 100
 
GRA 8100   100 (8 fori) 230 V ~ 19 200 110 155 G 931
GRA 4100   100 (8 fori) 24 V ~/­ 16 200 110 155
GRA 2100   100 (8 fori) 12 V ~/­ 16 200 110 155

  • (1) ­ Maximum working pressure

  • (2) ­ Flow of methane with pressure drop of 0.5 mbar (5mmWG) e 1 mbar (10 mmWG).

  • 100 mbar = 10 kPa = 1,000 mm.WG

PRESSURE DROP GRA

FEATURES OF GAS SOLENOID VALVES GAS

Model

Operation

Advantages

Disadvantages
 Normally open with manual re-set GRA

  • With power closes.

  • Without power opens only by manual action.

  • In kitchen permits using gas even in event lack of mains supply.

  • In boiler plant, in event failure of mains power, valve remains open and burners safety system operates.

  • On return of power, unnecessary manual operation to re-start plant.

  • In event lack of mains power, valve remains open and gas safety system remains active only if powered by back-up battery.

  • At present these are not subject to approval.