Swing Piston Pumps NPK 09
Operation
5
4. Operation
The pump must not start against pressure or vacuum. When it is
switched on the pressure in the suction and pressure lines must be
atmospheric. This also applies when the pump restarts after the
power has been cut off for a short period.
The maximum permissible operating pressure (see section 10)
must not be exceeded.
To prevent the maximum permissible operating pressure being
exceeded, restriction or control of the air or gas flow should only be
carried out in the suction line.
If restriction or control of the air or gas flow is made on the pres-
sure side ensure that the maximum permissible operating pressure
is not exceeded.
When the pump is at a standstill the inlet and exhaust must be at
normal atmospheric pressure.
Change the filter (accessories) if it is dirty.
The piston seals, and to a lesser extent the valve plates are the
only parts of the pump subject to wear. Wear is usually indicated
by a drastic reduction in the pneumatic performance. When
replacing parts proceed as described in section 5.
Ambient conditions: see section 1.3.
