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 Pumping units: The ZH hydraulic accumulator sets are equipped only with pumping sets manufactured by Hydro-Vacuum S.A. Support structure: It is a welded structure made of steel sections set on vibration dampers with height adjustment in the range of 20 mm and a levelling system. Manifolds: The manifolds combine the individual pumps in the set on the supply/suction and delivery ends. They are made of welded pipes and standard flange connections. One side of each manifold is ended by suitable metal and rubber flange caps. The manifolds have connector pipes for measurement equipment and protective devices (pressure transducers, pressure gauges, pressure controls, LCA pressure switches, etc.). The manifold layout and diameter can be customised on request. Fittings: Every unit in the ZH set is equipped with cut-off fitting on the supply/suction and delivery ends to isolate individual pumps without interrupting the operation of the whole set. The delivery side of each pump features a non-return valve.Design version of the set
Due to the necessary adaptation to various functional and installation conditions, the hydraulic accumulator sets are available in a wide range of design versions specified by a four-character code. The vertical frames are designed for free orientation of the control cabinet. The control cabinet vertical frame has an individual secondary frame.Features of the microprocessor controller used in standard ZHA 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 conductive measurement probes installed in the main bodies of pumps (ZHA). 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:
Design of ZHA, ZHB and ZHF sets
Each system can have its design and control features customised to exact specifications.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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SAMPLE INSTALLATIONS