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Summary
In the media being pumped, gases or
air often inevitably exist, which
can lead to instability during the
pumping process. To achieve stable
pumping of media containing a high
amount of air, remove the gases
within the media during pumping, and
address scenarios where the pump's
inlet pipe often lacks liquid and
requires self-priming functionality,
Jiangsu Kaifeng has successfully
developed the AD pump. This pump
features a built-in water ring
vacuum pump behind the main pump
impeller, combining self-priming and
degassing capabilities.
The AD pump has two functions:
1）Air Degassing Pump
When used as a degassing pump, it
can stably pump media with an air
content of <8% (concentration 0–6%)
through degassing. The return height
H of the degassing pipe can reach 6
meters, and the pulp-gas mixture can
be directly returned to the pulp
pool to avoid pulp loss.
2）Self Priming Pump
When used as a self-priming pump, it
has a strong self-priming capacity,
with a self-priming height H of up
to 6 meters.
Note: The
interface configurations of the
degassing pipes differ between
self-priming pumps and degassing
pumps. Please specify the required
application mode in the order.
Structure
Single-stage, single-flow,
volute-type vortex pump. Based on
its process design, the impeller,
built-in vacuum pump, shaft seal,
and bearing housing can be
disassembled and/or installed as a
"cartridge unit" without
disconnecting the suction and
discharge pipes.
Impeller
A specially designed semi-open
impeller with three main vanes and
multiple back vanes, featuring high
efficiency, abrasion resistance, and
non-clogging capabilities.
Built-in Vacuum Pump
The built-in water ring vacuum pump
is located behind the main pump
impeller, sharing the same shaft for
compact structure, strong degassing
capacity, and low power consumption.
Bearings
The pump shaft is supported by
imported SKF bearings lubricated
with oil or grease. Cylindrical
roller bearings are installed on the
pump end, while two angular contact
ball bearings are mounted
back-to-back on the drive end. The
oversized shaft ensures
vibration-free operation.
Shaft Seal
Single mechanical seal.
Vacuum Regulating Valve V-1
Vacuum Regulating Valve V-1 is
roughly adjusted at the factory. Its
function is to enable the vacuum
pump to obtain the required stable
vacuum degree (e.g., -0.5 to -0.6
bar) by adjusting the adjusting
screw sleeve of the vacuum valve.
This eliminates the screaming noise
generated in the pump due to high
vacuum and ensures that the vacuum
pump operates in a low-power
consumption and stable state.
Vacuum Gauge W-1
The Vacuum Gauge W-1 displays the
vacuum degree of the built-in vacuum
pump, with a measurement range of 0
~ -1 bar (0 ~ -0.1 MPa).
Technical Data
The AD-type pump is available in
multiple specifications. For
detailed data of the pump you
purchased, please refer to the data
sheets, characteristic curves,
dimension drawings, and sectional
diagrams in the appendix.
Nameplate
Each pump is equipped with a
nameplate fixed on the pump body,
providing important information
related to the pump.
二、Pump
Design
Characteristic Curves
We can provide various models of AD
pumps.
Note:
The above are standard models for
degassing conditions. For self -
priming conditions, add "S" after
the model number, e.g., AD100 -
400S.
Selection of Component Materials
To suit different operating
conditions, we offer two material
configurations for your choice:
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