GEM 8257, Installation, Operating And Maintenance Instructions

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8257
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6 Order data
Optional versions K number
Coil protection class EEx me II T3
ATEX marking II 2 GD 6419
Available voltages / Frequency
AC 24V AC 50 / 60 Hz
110V AC 50 / 60 Hz
230V AC 50 / 60 Hz
DC 24V DC -
Other voltages on request
Supply voltage Code
24V AC 24
110V AC 110
230V AC 230
24V DC 24
Frequency Code
50 Hz 50
60 Hz 60
DC DC
Connection Code
G 1/4 Threaded sockets DIN ISO 228 G2
G 3/8 Threaded sockets DIN ISO 228 G3
G 1/2 Threaded sockets DIN ISO 228 G4
G 1/4 Threaded sockets NPT N2
G 3/8 Threaded sockets NPT N3
G 1/2 Threaded sockets NPT N4
Order example
8257 10 D G3 12 2 1 230 50 6419
Type 8257
Nominal size 10
Body configuration (code) D
Connection (code) G3
Valve body material (code) 12
Seal material (code) 2
Control function (code) 1
Supply voltage (code) 230
Frequency (code) 50
Optional version (K-no.) 6419
Seal material Code
NBR (Perbunan N) max. 90° C 2
FPM max. 90° C 4
EPDM max. 90° C 14
HNBR max. 150° C 7
Valve body material Code
CW617N Brass 12
Stainless steel 1.4408 37
Control function Code
Normally closed 1
Body con fi guration Code
2/2-way D