 |
|
|
| |
|
|
| |
APPLICATION: |
|
| |
A nationally recognized manufacturer of quality paints uses air operated double
diaphragm (AODD) pumps in process and transfer applications. In this
application, the AODD pumps are used in a tank storage area to transfer Texanol,
a solvent-based paint additive, to the production facilities within the plant.
The AODD pump sits at the bottom of a 20' high Texanol storage tank. |
|
| |
|
|
| |
PROBLEM: |
|
| |
The inlet ball valves of the pump open and close several times per second. Each
time the ball valve is closed or "seated", the fluid velocity is abruptly
stopped. This creates high pressure spikes, or "water hammer". The force of the
spike severely weakens the integrity of the PTFE diaphragms by distorting their
shape with unbalanced pressure loads and concentrating stress onto one area of
the diaphragm, causing cold flow. The diaphragms were lasting only three weeks
before failure. Every time a diaphragm failed, production halted and solvent was
spilled into the containment dike and lost. |
|
| |
|
|
| |
SOLUTION: |
|
| |
A BLACOH SENTRY inlet stabilizer was
installed on the inlet side of the pump. The Inlet Stabilizer cushions and
absorbs the water hammer spikes created when the pump's inlet ball valves close.
When the pressure spikes are cushioned, the effect of high acceleration head is
diminished and the stress is removed, resulting in increased diaphragm life. |
|
| |
|
|
| |
RESULT: |
|
| |
The BLACOH Inlet Stabilizer has been
installed for over one year. In that time, the pump has not had a diaphragm
failure and additional units have been installed on other AODD pumps in the tank
storage area. |
|
| |
|
|
| |
SUBMITTED BY: |
|
| |
PUMPING SOLUTIONS, INC. |
|
| |
|
|
| |
|
|
|
|
|
 |