Exchange Of Diaphragms - Sera ABP - 030 Notice De Mise En Service

Air driven diaphragm pump
Pompe pneumatique à membrane
Operating instructions
Notice de mise en service
9.4

Exchange of diaphragms

CAUTION !
All work to be performed only on a pressureless system !
For flawless function of the air driven diaphragm pump and to
maintain the required safety and protection characteristics –
especially in explosion hazard areas – the drive diaphragms
must be regularly inspected and replaced.
For maintenance intervals pertaining to the diaphragms, see
section 9.1 „Wear parts".
Procedure for changing diaphragms:
Properly shut down the air driven diaphragm pump.
Ensure that the pump and its connection lines are
pressureless, and release the pressure if needed.
Disassemble the suction and pressure connections from the
pump while observing the corresponding safety and protection
measures.
Disassemble the suction and pressure channel of the pump.
Loosen the mounting screws and remove both pump housings.
www.sera-web.com
24
Loosen and remove the diaphragm fasteners.
Remove the diaphragms and check their condition. After the
prescribed interval has elapsed (see section 9.1) or when there
is evidence of wear, the diaphragms must be replaced. We
recommend that both diaphragm packages be replaced at the
same time.
CAUTION !
Ensure that there are no deposits inside the pump, and
clean these out if necessary.
CAUTION !
The parts comprising the control valve, including the
shaft, are not resistant to chemical attack. If the control
valve has come into contact with the medium following a
diaphragm break, the control valve must be replaced as
described in section 9.5.
Reassemble the air driven diaphragm pump in reverse order.
CAUTION !
Observe tightening torques ! (see section 9.4.1)
Tighten the mounting screws evenly. Connect the suction and
pressure lines. Connect the compressed air supply.
The air driven diaphragm pump is now ready to use again.
Subject to technical modifications!
TA 312 Rev. 21 en 08/2018