Main applications:
TECHNICAL DATA
Construction:
The hydraulic accumulator sets are systems of several pumps that usually have the same size and which are connected in parallel to the supply and delivery manifolds by non-return and cut-off fittings. The set pumps are installed on a support structure made of steel sections. The support structure features vibration dampers that allow setting the set directly on floors. The ZHG hydraulic accumulator sets are based on parallel connections of GAB submersible pumps enclosed in hermetic shells. The number of pumps in the set ranges from 2 to 4. The set designation is specified according to the key listed at the beginning of this catalogue. The sets of this design version with the pumps running submerged in the pumped medium feature very quiet operation and do not cause a nuisance even if installed in rooms directly adjacent to inhabited rooms. Pumping units: The ZHG type features GAB submersible pumps. They are multi-stage submersible pumping units with an output ranging from 0.9 m3/h to 15 m3/h and hydraulic rise capacity from 10 m H2O to 90 m H2O, depending on the number of stages. Support structure: The pumps of the hydraulic accumulator sets are installed on a support structure in the form of a framework made of austenitic steel. The support structure is set on vibration dampers at the installation site. The vibration dampers reduce transmission of vibration to the ground and eliminate the need for special foundation work. Fittings and manifolds: The manifolds connect the pumps in parallel with fittings. The manifolds, hermetic shells and all connections are made of stainless steel. The manifolds feature pressure gauges and transducers. The delivery manifold also features membrane pressure vessels which minimise the water hammer during starting and stopping of individual pumps. Due to the specific nature of certain serviced facilities (high-rise buildings, multi-family residential buildings, etc.) with variable water consumption, the available pressure vessel capacity ranges from 18 dm3 to 200 dm3.Set type | Pump type |
ZHG.1 | GAB.2 |
ZHG.2 | GAB.4 |
ZHG.3 | GAB.5 |
Features of the microprocessor controller used in standard ZHG set control systems:
Features of the controller software:
Control cabinet
The control system is installed in a cabinet with an IP54 enclosure. The cabinet size depends on the hydraulic accumulator set size. The cabinet sizes are listed in the set dimensioning tables. The cabinet structure is metal with powder coating. The cabinet has an independent support structure (vertical frame) that accomodates any installation orientation. One end of the structure rests on vibration dampers and the other is fixed to the support structure of the pumps. The control cabinet front door features:Dry run protection
The set pumps are protected as standard from dry running by means of conductivity probes placed in hermetic coats. In addition, a set that is operated with an open reservoir can feature float switches or a system of conductive measurement probes, or work with a hydrostatic probe that controls the reservoir filling. In this version the set has no pressure transducer on the supply manifold. A set operated on a water supply system has the pump dry run protection with the aforementioned conductive measurement probes and a pressure transducer on the suction/supply manifold. The available optional protection includes an LCA pressure switch installed on the suction/supply manifold of the set.Installation site considerations:
Features of sets:
Hydro-Vacuum S.A. Pump Selection Progam.
Quick and simple online tool for pump selection based on set criteria.Pump related products
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