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Maintenance
After a prolonged period of operation,
the cut–out pressure may vary from
the specified value. Turning the spring
housing allows the precompression of
spring(7) and thus the cut–out pres-
sure to be adjusted.
This operation should only be carried
out by trained specialists.
Technical features
Type Dimen– Graphic Max. Min. Safety
no. sional symbol cut–out cut–in valve
drawing (see overleaf) pressure pressure opening
pressure
–– – bar bar bar
DR 3218 I 1 7.35ť0.2 6.2 N/A
DR 3226 I 1 10.00ť0.2 9.0 N/A
DR 3227 I 1 8.10ť0.2 7.1 N/A
DR 3242 II 2 9.50ť0.2 8.6 10.5
DR 3243 I 1 8.50ť0.2 7.3 N/A
Accessory valve required : Relief valve AE 13.. according to catalogue
sheet AE 1000–K 14 EN
Temperature range : –40°C to ˌ150°C
Weight : 0.9kg
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