SUBMERSIBLE MIXERS & FLOW MAKERS

The EYS Submersible Mixer and Flow Maker range is a comprehensive family of submersible and longshaft mixing units engineered to address every slurry homogenisation, biogas tank agitation and material circulation requirement across agricultural, biogas and industrial wastewater applications. The range comprises four distinct product families — the DK Modular Submersible Mixer series, the FM Low Speed Flow Makers, the FM Moderate Speed Flow Makers and the DTK Longshaft Biogas Agitators — each purpose-engineered for a specific combination of application, tank geometry, operating depth and dry matter content.

DK Series Modular Submersible Mixers
Represent the latest evolution of EYS submersible mixing technology, introducing two landmark design advances as standard production features. The first is a new in-house propeller design that delivers up to 26% greater thrust force than the equivalent previous DK models, achieved without any increase in motor power – giving the operator more effective mixing circulation per kilowatt of electrical input. The second is a revolutionary field-replaceable mechanical seal system that allows the double mechanical seal to be exchanged without returning the machine to a workshop – a development that substantially reduces the cost and downtime associated with seal service on units operating continuously in aggressive manure and digestate environments. All standard DK models now incorporate a high-efficiency IE3 motor, reducing operating energy consumption compared to the previous IE2 motor platform. Five models from DK55 at 5.5 kW through to DK185 at 18.5 kW cover every scale of manure pit, biogas tank and wastewater application. The modular design principle extends beyond the seal to all major assemblies: motor, gearbox and propeller modules can all be replaced in the field from stocked spares within minutes. The existing HD heavy duty series continues in parallel for the most demanding applications.

The DK Series propellers operate in both push and pull directions, enabling the operator to select the flow pattern that best addresses the specific pit geometry and material condition at each installation. The two-blade propeller option is suited to slalom-type pits, framed installations and corridor applications; the three-blade option generates higher thrust and flow volume for large-volume pit and tank agitation. Both propeller types are manufactured from AISI 304 stainless steel with a special design profile developed in-house. A double mechanical seal provides two independent sealing barriers, backed by integrated leakage and thermal sensors that provide continuous motor protection and trigger automated protective shutdown before damage can occur. Optional ATEX certification is available for all DK models for safe operation inside sealed biogas environments.

FM Flow Maker
This range divides into two sub-series based on operating speed. FM30 and FM55 Low Speed Flow Makers use a 2-stage planetary gearbox to drive large-diameter propellers (1,400 and 2,500 mm) at just 50 rpm, producing maximum whole-tank circulation flow from minimum power input — the physically most efficient approach to large-volume pit and tank agitation. Both FM30 and FM55 carry reinforced polyurethane propellers for extended service life in abrasive media. FM75 and FM110 Moderate Speed Flow Makers operate at 80 and 110 rpm respectively, with specially designed double-curved AISI 1.4301 stainless steel propeller blades that maximise energy efficiency at the higher speed range. All FM models are suited to aerobic and anaerobic environments including biogas tanks, manure pits, sedimentation tanks and wastewater treatment installations. An EYS biogas platform is available for FM75 and FM110 installations, providing a built-in hand winch for mixer extraction to service window level and a horizontal axis rotation mechanism for directional adjustment without opening the tank.

DTK Longshaft Biogas Agitator
Is a wall-mounted longshaft mixer specifically designed for sealed biogas tank environments handling digestate up to 14% DM at temperatures to 70°C. Three models from 11 to 22 kW deliver axial forces from 3,300 to 4,500 N at flow velocities from 3.4 to 4.4 m/s. The hydraulic hand pump adjustment system enables ±25° angular positioning in both the vertical and horizontal axes without tank entry — allowing the operator to direct the mixing flow precisely to any zone within the tank from outside. An ATEX Zone II Ex-proof motor is standard, and a gas protection cabinet on the service box minimises gas escape during mixer extraction at service intervals. The EYS Submersible Mixer and Flow Maker range integrates directly into ENVIROXX complete manure management, biogas and industrial system configurations as the primary agitation and homogenisation platform.