Blagdon Pump Pulsation Dampeners - Manual (Page 9)

Model PD80M Page 7
Blagdon Pump ® , IDEX Pump Technologies (Ireland) Ltd., A Unit of IDEX Corporation • R79, Shannon, Co Claire, IRELAND • Tel: +353 61 47933
www.blagdonpump.com
pd80mdl2sm-rev0510
O perating and Maintenance Instructions
The Blagdon Pump PULSATION DAMPENER is a completely automatic
diaphragm-fitted pulsation dampener to reduce the flow and pressure pulsations
in a pumping system characteristic of reciprocating type pumps.
Principle of Operation: The PULSATION DAMPENER uses a flexible diaphragm
to separate a liquid chamber from compressed air chambers. A rod connected
to the center of one diaphragm activates the air inlet and exhaust valves, which
automatically admits or exhausts air in the air chambers. This maintains the
diaphragms in mid-range of stroke for maximum pulsation dampening.
Installation: Locate the PULSATION DAMPENER in discharge piping as close as
possible to the pump. Measures must be taken to support the weight of the unit.
Do not rely on piping connection for support of the unit. The unit will operate in
any position. Connect the air inlet connection to an air supply line having the
same air pressure as that at the air inlet connection to the pump. Do not exceed
8.6 Bar/125 PSI.
Service Instructions: When service is required, it is important to MAKE
CERTAIN THAT INLET AIR PRESSURE AND LIQUID SYSTEM PRESSURES
ARE VENTED. Before maintenance or repair, shut off the compressed air line,
bleed the pressure, and disconnect the air line from the pump. The discharge
line may be pressurized and must be bled of its pressure. When used for toxic or
aggressive fluids, the unit should always be flushed clean prior to disassembly.
The diaphragms are serviced by simply removing twelve hex nuts and removing
the center spool casting.
When PTFE diaphragms are used in conjunction with the elastomeric diaphragms
they are placed over the “wetted” sides of each elastomeric diaphragm. Inlet and
exhaust air valves are located externally for easy access and service.
Warranty: This unit is guaranteed for a period of five years against defective
material and workmanship.
OPERATING AND MAINTENANCE MANUAL
Pulsation Dampener Model PD80M
Design Level 2
Before doing any
m a i n t e n a n c e o n t h e
pulsation dampener, be
certain all pressure is
completely vented from the
pump, suction, discharge, piping, and all other
openings and connections. Be certain the air
supply is locked out or made non‑operational,
so that it cannot be started while work is being
done on the pump. Be certain that approved
eye protection and protective clothing are worn
all times in the vicinity of the pump. Failure to
follow these recommendations may result in
serious injury or death.
WARNING
Read these safety warnings
and instructions in this
manual completely, before
installation and start‑up of
the pulsation dampener. It
is the responsibility of the purchaser to retain
this manual for reference. Failure to comply
with the recommendations stated in this manual
will damage the pulsation dampener, and void
factory warranty.
Before surge suppressor
operation, inspect all
gasketed fasteners for
looseness caused by
gasket creep. Re‑torque
loose fasteners to prevent leakage. Follow
recommended torques stated in this manual.
CAUTION
POSSIBLE EXPLOSION HAZARD can result if
1, 1, 1, ‑Trichloroethance, Methylene Chloride
or other Halogenated Hydrocarbon solvents
are used in pressurized fluid systems having
Aluminum or Galvanized wetted parts. Death,
serious bodily injury and/or property damage
could result. Consult with the factory if you
have questions concerning Halogenated
Hydrocarbon solvents.
HAZARD WARNING
Take action to prevent static
sparking. Fire or explosion
can result, especially
when handling flammable
liquids. The pump, piping,
valves, containers or other
miscellaneous equipment must be grounded.
WARNING
CAUTION