Operations & maintenance manual – ASTRA evo (DDE)
ARGALAIR 2020 | Rev. 6
31
6
The pump stalls
Suction pipe clogs during operation
Replace the suction pipe
Dirty air, full of condensate or oil
Check the air line. Follow the indications within
the use manual
Insufficient air volume or pressure
Check the pressure with a gauge installed on
the pump and with running pump. If pressure in
that point is too low related to the mains
pressure, check all the air connections. Check
that all the air control devices have a sufficient
flow rate
Defective pneumatic exchanger
Replace pneumatic exchanger
The stop procedure was not
respected
Respect the stop procedure
7
Liquid leaks from the pump
Screws on the fluid chamber not
properly tightened
Check tightening torques of the screws
O-rings on manifolds damaged
Replace O-rings
Damaged diaphragms
Check / replace diaphragms
8
The pump does not deliver
the flow rate indicated on the table
Suction or air connection blocked
Check / clean air supply / suction connection
The product suction pipe is not
correctly connected or not correctly
dimensioned
Check the suction line
Clogged pipes
Check and clean
Too viscous fluid
Install pipes with greater size especially for
suction and decrease the pumps cycles
Valve balls do not close / Valve seats
are worn
Disassemble the manifolds and clean the seats
or replace the balls and the seats if worn
Insufficient air volume
Check the pressure with a gauge installed on
the pump and with running pump. If pressure in
that point is too low related to the mains
pressure, check all the air connections. Check
that all the air control devices have a sufficient
flow rate.
Diaphragms breakdown
Check / replace diaphragms
Icing on the silencer
Improve the air quality
Pressure losses on suction side
Check / change installation on suction side
Pressure fall in air supply
Increase the air pressure via a filter-regulator
9
Diaphragms breakdown
Pressure too high during installation
Use a protective treatment system /
air regulation (follow the use manual)
Dry running of the pump for long
periods
Run the pump slowly if not filled with fluid (dry
running case) – follow the instructions within
use manual
Pressure too high on suction side
Make sure there is a pressure balance
between the air side and the fluid side of the
diaphragm
10 Leakage of fluid from the silencer
Diaphragms breakdown
Check / replace diaphragms
Table 6
Summary of Contents for ASTRA Evo DDE 030
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