Side Channel pumps Self-priming, segmental type ADHL/CDHL 0801 ... 2504 AEHL 0805 ... 08080 pages

Application
The Sterling SIHI ADHL/AEHL and CDHL pumps are selfpriming
side channel pumps capable of handling gas along
with the medium and operates at a low noise level.
The ADHL/AEHL series are used to handle clear or turbid
liquids, under high heads and without any abrasive particles,
reliably and trouble-free. The CDHL with NPSH-improving
inducer stage are used when liquids under critical suction
conditions have to be handled reliably and trouble-free.
With these pumps a safe and efficient pumping service can
be achieved even if the net positive suction head available is
low.
The number of hydraulic stages are as is customary in the
boiler industry.
The performance curve steepness admits a precise regulation
of the pressure with a small change in capacity.
The pumps are used in;
• Boiler industry for condensate and boiler feed water
handling,
• Washing, cleaning and spraying plants,
• Dry cleaning.
Design
The pumps of the ADHL/AEHL and the CDHL series have a
segmental construction with open vane wheel impellers.
The CDHL pumps (combination pumps) are equipped with
open impellers as well as a suction side centrifugal stage for
attaining superior characteristics with respect to the Net
Positive Suction Head (NPSH).
The pumps of the ADHL/CDHL/AEHL series are side channel
pumps of the high-speed type that have been designed with
special regard to noiseless running. The program comprises
6 sizes.
Construction
Casing pressure
Maximum 25 bar from 0 °C up to +120 °C for ADHL/CDHL
Maximum 40 bar from 0 °C up to +120 °C for AEHL
Please observe
Technical rules and safety regulations:
Casing pressure = inlet pressure + delivery head at minimum
pump capacity.
Position of branches
Suction and discharge branch point radially upwards.
Flanges
The flanges correspond to DIN EN 1092-2, PN 25 for ADHL/
CDHL and PN 40 for AEHL. Flanges drilled according to ANSI
150 or 300 lbs are basically possible.
Bearing
One grease lubricated ball bearing according to DIN 625
and one liquid surrounded sleeve bearing (design A). The
first grease filling is done in the factory.
Direction of rotation
Clockwise, when looking at the pump from the drive end.
Shaft sealing
The shaft can be sealed by a stuffing box or a standard
mechanical seal.
Technical data
Capacity: from 0,3 up to 7,2 m³/h
Head: from 20 up to 400 m
Speed: 2900 rpm (max. 3400 rpm for ADH 0800/0900)
Temperature: max. 120 °C
Casing pressure: PN 25 for ADHL/CDHL
PN 40 for AEHL
Shaft sealing: stuffing box or
standard mechanical seal
Flange connections: DIN 2501 / PN 25 and PN 40
Direction of rotation: clockwise
(when seen from the drive end)
Side Channel pumps
Self-priming, segmental type
ADHL/CDHL 0801 ... 2504
AEHL 0805 ... 0808
Sterling Fluid Systems Pumping Technology ADHL/CDHL/AEHL-00 / 2003