GEM 8257, Installation, Operating And Maintenance Instructions

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8257
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5 Technical data
Wiring note
Special wiring on request. When using electronic switches and additional wiring, carefully design out any potential residual cur-
rents upon installation.
Nominal size Connection - Threaded sockets Operating pressure [bar] K
v
value Weight
DN DIN ISO 228 NPT
Seal material
[m 3 /h] [kg]
Code 2, 4, 14 Code 7
10
G 1/4 1/4" NPT
0 - 10 0 - 6
1.5 0.5
G 3/8 3/8" NPT 1.7 0.5
G 1/2 1/2" NPT 1.7 0.6
Power consumption
AC operation: Pull in / Hold in
Control function 1 13 VA
DC operation: Pull in / Hold in
Control function 1 12 W
Mounting position
Optional, preferably coil vertically upwards
Protection class
IP 65 (with plug)
Permissible voltage tolerance
±10 % to VDE 0580
Rating
Continuously rated
Working medium
Inert gaseous and liquid media which have no negative
impact on the physical and chemical properties of the body
and seal material.
Max. perm. viscosity of working medium
25 mm
²
/s (cSt)
Note: When used with contaminated media we recommend
installing a strainer in front of the valve (on request)
Perm. temperature of working medium
-10° C to +90° C
-10° C to +150° C only with seal material HNBR (code 7)
Ambient temperature
-10° C to +50° C