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Hydraulic accessories

Coupling devices

Coupling devices are essential accessories for making a reversible hydraulic connection between the pump and the outlet piping. This system allows the pump to be brought to the surface and then quickly reconnected, with no need to drain the tank, often an expensive operation involving lengthy plant stoppages. Perfect coupling between flange and device is ensured on all units in the Zenit range by means of a rubber seal. In addition, all bottom devices are designed with two guide pipes for trouble-free perfect alignment during coupling.
The external coupling device (DAC E), the only accessory of its type, can also be applied and used on existing plants. The unusual shape of the accessory allows the unpleasant and laborious task of tank draining to be avoided even during the installation stages.
The Zenit bottom coupling devices can have horizontal or vertical outlets in order to better adapt to the customer's needs.
All cast iron coupling devices are designed to receive 2 guide pipes which can accompany the pump into its working position without undesired twisting.
Furthermore, a PATENTED system simplifies pump release and reduces the mechanical stresses on the guide pipes, even after an extended period of time immersed in the wastewater.
There is also a special stainless steel device that is indicated for the installation with pumps from the DRY series when acids or sea water are present.
Another special feature of the Zenit vertical coupling systems is that they are designed to keep the pump's intake port at an ideal distance without the need for creating a step.
They therefore provide a considerable savings in terms of time and the costs involved in the building of the collection tanks as well as easy replacement in pre-existing plants.
The DAC V vertical bottom coupling device can be coupled to a special 2" ball valve.
Thanks to the special breather valve incorporated into the DAC structure, any air pockets that may form during the summer, for example, when the water level in the well drops below the priming threshold, are expelled allowing the electric pump to operate regularly.
The image below shows the previously described version.
This accessory's reduced size allows for easy use in small dimension wells.




DAC E (GAS 2")
• fixed structure in GJL-250 cast iron - movable structure in GJS-600-3
• epoxy-vinyl paint
• seals in NBR rubber
• full free passage
• fixing to tank walls by means of DN50 PN10 flange or 2” GAS thread
• with a suitable male/female reduction adapter the accessory can also be used with GAS 11/4...
Details
 
DAC H (DN32 PN6 - DN50 PN10)
• structure in GJL-250 cast iron
• seal in NBR rubber
• epoxy-vinyl paint
• full free passage
• complete with pipe guide, sliding flange (including stainless steel fasteners) and 2" GAS threaded bend in stainless steel
Details
 
DAC H (DN65-DN250)
• structure in GJL-250 cast iron
• seal in NBR rubber
• epoxy-vinyl paint
• full free passage
• complete with pipe guide and sliding flange with stainless steel fasteners
• a patented system simplifies pump release and reduces the mechanical stresses on the guide pipes
Details
 
DAC V (1 1/2” - 2” ; DN32 PN6 - DN50 PN10)
• structure in GJL-250 cast iron
• seal in NBR rubber
• epoxy-vinyl paint
• full free passage
• complete with fitting for connection to polyethylene tube (diameter 63 mm)
• threaded outlet GAS 2” and GAS 21/2”
• complete with pipe guide and sliding flange with stainless steel fasteners
• allo...
Details
 
DAC V (DN65-DN300)
• structure in GJL-250 cast iron
• seal in NBR rubber
• epoxy-vinyl paint
• full free passage
• complete with pipe guide and sliding flange with stainless steel fasteners
• allows the pump intake port to be kept at optimal height, meaning there is no need to provide a step in the bottom of the ...
Details
 
DAC X
• structure and flange in AISI 316 stainless steel
• seal in NBR
• full free passage
• recommended for installations with corrosive or saline liquids
Details