Possibly, but when it comes to compact inline grinders, the case for twin shaft over single shaft is not necessarily as clear cut.
The essential difference is that twin shaft grinders create the shearing action by interlacing the cutter blades on each shaft, whereas a single shaft achieves this by rotating its blades through a fixed element in the housing. In either case, these cutter elements introduce an obstruction to the flow which then results in a pressure drop across the grinder unit. That pressure drop, although small, is typically two to three times greater in a twin shaft grinder.
Most, if not all, inline grinders are motor driven; if the power fails and the motor stops, then the only flow possible is that which can pass through the available open space. In a twin shaft unit this is very restricted, leading to the system backing up rapidly, whereas the single shaft grinders have a large open centre design as a functional necessity and allow a much greater degree of bypass.
A consequence of this open centre requirement is that the rotating blade element will have a significantly larger outside diameter than the twin shaft cutters. This increases both the peripheral tip speed and the shearing energy they generate, leading to a more efficient cutting action and a lower risk of jamming.
As with most things, the fewer number of parts involved, the lower the risk of breakdown. Servicing is simpler and maintenance time and spares costs are reduced. Typically a single shaft grinder can contain up to 30 per cent less parts than an equivalent capacity twin shaft.
Conhur is the distributor for Sydex’s range of Defender inline or channel grinders, which feature all of these advantages:
- Single shaft design, high strength double bearing support
- Low head loss, high bypass capability
- European built, CE marked
- Excellent reduction, output size just 4-5mm
- Readily available
- Quiet, 70 dba
The Defender range offers an appropriate compact inline grinder for any 4, 6, 8” pipelines, preserving the upstream functions whilst protecting the downstream activities.
When used in conjunction with the solids handling capability of the Sydex positive displacement pumps, this creates a formidable combination of process capability and exceptional service life.
If your problems need cutting down to size, Conhur can help!
Sydex Eliminator Macerator Pump
Maintaining effective flow through small bore pipes over longer distances or high lift is notoriously difficult when dealing with fluid with a high level of solids or suspended materials. By ensuring the input to the pump is reduced to small particles, the risk of blockage, backflow premature wear and pump damage are all but eliminated. This self-priming positive displacement macerator pump is capable of significant suction lift, making it ideal for many difficult applications.
The hardened stainless steel cutter of the integral macerator unit cuts and shreds the solids into small particles before entering the pumping element. This efficiently macerated waste is then easily transferred to the final destination without risk of blockages or failure. Ideal for domestic or small commercial premises where main sewerage or drainage is not available or where gravity feed is insufficient, the Eliminator can be an attractive and very cost effective solution.
For more information, visit www.conhur.com or contact the team on 1800 422 615.
