Adjustable
The adjustable model uses a self-relieving regulator to set dampener pressure. A
compressed air line must be permanently attached to the regulator. The regulator
allows for an easy, convenient method for readjusting the dampener pressure if the
system fluid pressure changes. Adjustable units are designed for use on air operated
diaphragm pumps in systems with constant discharge pressure.
Automatic
An automatic poppet type valve located in the non-wetted section of the dampener
allows for an increase in compressed air pressure to balance an increase in system
liquid pressure. As liquid system pressure increases, the bladder is pushed further
up into the dampener until it contacts the internal automatic valve. This contact
opens the valve and allows an increase of compressed air to enter the dampener.
When the air pressure inside the dampener equals the system liquid pressure, the
dampener is in balance and pulsations are minimized. If a change in pressure occurs
this process is repeated. Automatic units are designed for use on air operated diaphragm
pumps in systems with a varying discharge pressure.
Chargeable
The chargeable model has a Schrader type charging valve that allows for a predetermined
pressure charge to be applied and held in the dampener. No permanent source of compressed
gas is required to be attached to the unit. The chargeable models are used primarily
with metering, piston and peristaltic pumps for pulsation dampening. Chargeable
models are also used for surge suppression to prevent water hammer from quick closing
valves, for make-up fluid to prevent pump cycling and for suppression of pump startup
or shutdown pressure spikes.
Inlet Stabilizer
The patented inlet stabilizer air control (U.S. Patent No. 6,089,837) consists of
a compound pressure gauge, a pressure/vacuum tight ball valve and a venturi valve.
When compressed air is passed through the venturi valve at high speed, a low pressure
area is created which is used to evacuate the air from the stabilizer, creating
a vacuum internally. Conversely, when the flow of air through the venturi valve
is diverted into the stabilizer, a pressure charge is obtained. When pump inlet
conditions are optimized, pump efficiency is maximized.