KM 251 en Start-up/Shutdown
V1.0 33
Caution
Check the oil level at least every 2 weeks and add oil if necessary.
Only use original ALLDOS gear oil!
7.2.5 After start-up
Caution
Following initial start-up and after each time the diaphragm is changed, tighten the
fixing screws on the dosing head:
After approximately 6 - 10 working hours or two days, tighten the dosing head
screws crosswise using a torque wrench.
Torque:
7.3 Setting the pressure relief valve
If the written agreement does not specify a system-specific opening pressure, then the
pressure relief valve is set to a slightly greater opening pressure than the bleed pressure
for the pump. It can however be set by the customer to a smaller opening pressure.
Opening pressure of the pressure relief valve
Setting the opening pressure
Pump Type Order No. Description
KM 251 single / double 555-300 1.3 l white oil (Paraffin 55 DAB7)
8 - 10 Nm for KM 251 / 10 bar
10 - 12 Nm for KM 251 / 16 bar
13 - 15 Nm for KM 251 / 25 bar
Bleed pressure of
the pump [bar]
Opening pressure of the
pressure relief valve [bar]
10 13
16 18
25 28
To do so, a manometer must be installed in the
pressure line and behind the manometer, a shut-
off valve.
To set the pressure relief valve, use a screwdriver.
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