12
5.3 - MANUAL BY-PASS VALVE
1 - The relief valve can be used even as manual by-pass to adjust the capacity.
2 - Loosening the register screw (59), release the pressure on the spring so that to remove the piston (57) from the
pumping chamber, letting part of the pumped liquid go back into the sucking chamber.
3 - This operation is not allowed with volatile liquids or with products sensitive to temperature increase, due to the
product continuous recycle.
4 - For products with viscosity over 15.000 Cps, if you have to recycle the whole pumped product, we suggest you
should arrange on line a by-pass, rightly proportionate, so that it allows the whole flow transit.
Fig. 12
To Next Page
Loading...
