Equipment anatomy / Dynamos

Inside the
crossflow filter.

A membrane separates the liquid. Rotating discs help keep its surface clear. Take the system apart to see how each assembly contributes.

FIG. 01ROTARY-DISC FILTRATION

Click a part to separate itCutaway · assembled

Selected assemblyIllustrative flow pathA learning cutaway of the filtration module and its supporting systems. Geometry, disc count and layout are illustrative; separation shows component relationships, not a maintenance sequence.

Explore the assemblies

01—08

COMPONENT NOTES

01 / 08

Containment

Filtration bell

The horizontal filtration bell contains the disc pack and the liquid being processed. The brochure describes stainless steel AISI 304 construction, with product-contact parts optionally made in AISI 316.

What it does

Keeps the feed side and filtrate collection path in one enclosed vessel.
Houses one or more rotating hollow shafts carrying the filtering elements.
The cutaway opens the shell so the outside-to-inside filtration path is visible.

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Filtration bell

The vessel holds the feed around the rotating filtering elements. The exposed half in this drawing is a cutaway, so you can see the disc bank inside.

INVOLVED IN

Cross-flow filtrationPermeate backwashCIP chemical cleaning

02 / 08

Access boundary

End cover

The end cover is shown as the removable boundary of the filtration bell, revealing the shaft ends and disc pack when separated. The brochure identifies mechanical seals on the hollow shafts; exact cover and seal arrangements vary by model.

What it does

Opens the bell in the cutaway so visitors can see the disc stack and hollow shaft.
Represents the access boundary at the end of the filtration bell.
Mechanical seals belong to the hollow shaft assembly; this view keeps that interface visible without assigning a specific seal layout.

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Access cover

The end cover is separated here to reveal the disc bank. Its fasteners and proportions are illustrative; this movement explains the enclosure rather than a service procedure.

INVOLVED IN

Cross-flow filtrationPermeate backwashCIP chemical cleaning

03 / 08

Filtering surface

Rotating disc pack

A set of filtering discs is fixed to one or more hollow shafts. Liquid crosses the disc membrane from the outside toward the inside under trans-membrane pressure, while the hollow shaft collects the permeate.

What it does

The disc surfaces are the active filtering elements.
Tangential motion helps limit membrane fouling and keeps the filtering surface moving through the feed.
The hollow centre of the disc and shaft forms the permeate collection route.

Look closer

Filtering discs

The membrane is the separating surface. Permeate passes from the feed-facing outside into the disc, while retained material stays in the feed stream.

Hollow shaft

The shaft carries the discs and collects the permeate from their interiors. It combines mechanical support with a separate path for the filtered liquid.

INVOLVED IN

Cross-flow filtrationPermeate backwashCIP chemical cleaning

04 / 08

Rotation

Shaft drive

A geared motor with an inverter rotates each hollow shaft. That motion keeps the filtering discs moving through the feed and supports the tangential cross-flow behavior described by the manufacturer.

What it does

Supports the filtering elements and turns them through the feed.
Connects the motorized drive to the hollow shaft.
An inverter allows the drive to be operated as part of the process control system.

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Geared motor

The motor and gearbox rotate the shaft. An inverter controls the drive; the disc motion supplies tangential movement at the filtering surface.

Shaft seals

Mechanical seals are fitted at the rotating hollow shafts. The drawing groups the seal and bearing area beside the drive; the actual arrangement depends on the model.

INVOLVED IN

Cross-flow filtration

05 / 08

Suspended solids

Feed and retentate loop

A self-priming volumetric feed pump sends product from the feed tank to the filtration bell. The manufacturer’s schematic returns the unfiltered product to the feed tank as a retentate loop.

What it does

Carries high-solids liquid to the outside of the rotating discs.
Keeps the retained stream in the process loop while permeate is collected separately.
The retentate route returns product toward the feed tank, as shown in the manufacturer’s schematic.

Look closer

Volumetric feed pump

The self-priming volumetric pump supplies product from the feed tank to the filtration bell. The feed tank itself sits outside this illustrated skid.

Feed valves and instruments

Valves establish the configured flow path, while instruments provide operating measurements. This drawing simplifies their number and positions.

INVOLVED IN

Cross-flow filtration

06 / 08

Filtered product

Permeate collection

Permeate passes through the discs, enters the hollow shaft manifold, and is conveyed to a filtrate buffer or extraction tank. A centrifugal pump then sends the filtered product onward.

What it does

Collects liquid that has crossed the disc membrane.
Uses a buffer or extraction tank to receive the permeate before transfer.
The extraction pump also provides the flow used for the brochure’s backwash function.

Look closer

Permeate buffer tank

This tank receives filtered liquid from the hollow-shaft collection route before transfer onward. The manufacturer also describes a spray ball in the tank.

Extraction pump

The centrifugal extraction pump sends permeate onward. It is also used for the reverse permeate flow in the backwash function.

Level sensing

Level probes are part of the automatic system’s instrumentation. Here a representative sensor marks the tank’s measurement and control role.

INVOLVED IN

Cross-flow filtrationPermeate backwash

07 / 08

Process control

Valves, instruments and PLC

The complete automatic version combines motorized valves with pneumatic actuators, pressure and level sensors, a magnetic flow meter, and a stainless control cabinet with PLC and colour touch screen.

What it does

Coordinates the filtration phases and the automatic valve movements.
Monitors pressure, level and magnetic flow as part of the process instrumentation.
A chemical dosing pump is used for CIP products; the exact recipe is installation-specific.

Look closer

PLC and touchscreen

The controller coordinates the equipment’s configured operating phases. The touchscreen provides the operator interface for the automatic system.

Process instrumentation

The automatic version includes pressure and level probes and a magnetic flow meter. Their signals help the controller monitor and coordinate the filtration process.

INVOLVED IN

Cross-flow filtrationPermeate backwashCIP chemical cleaning

08 / 08

Support frame

Skid and adjustable feet

The skid gathers the bell, pumps, pipework and control cabinet into one supported unit. Adjustable feet level the assembly on the installation floor.

What it does

Carries the filtration vessel and auxiliary equipment as a compact modular system.
Supports the pumps, pipework and control cabinet on the skid.
The illustrated frame is representative; dimensions and equipment layout depend on the selected model.

Look closer

Skid frame

The frame supports the vessel and auxiliary equipment as one compact unit. Mounting pads and supports shown here explain those relationships.

Adjustable feet

The manufacturer specifies adjustable feet for the unit. They support and level the skid on the installation floor.

INVOLVED IN

Cross-flow filtrationPermeate backwashCIP chemical cleaning

FOLLOW THE PROCESS

One system. Different jobs.

Use the process selector above the drawing to explore filtration, backwash and cleaning.

Feed → disc surface → hollow shaft → permeate outlet

Cross-flow filtration

Feed moves across the outside of rotating discs. Under trans-membrane pressure, permeate crosses the discs, enters the hollow shafts and leaves through the collection route; retained product returns to the feed loop.

01
A volumetric feed pump sends product from the feed tank to the filtration bell.
02
The geared drive rotates the hollow shaft and the disc pack inside the bell.
03
Permeate crosses the discs from outside to inside and is collected inside the hollow shafts.
04
The permeate moves to the buffer or extraction tank, while retained product returns toward the feed tank.

Permeate tank → hollow shaft → disc surface → backwash outlet

Permeate backwash

The extraction pump sends permeate in the reverse direction to clear the filtering surface. This is the routine backwash path described separately from chemical cleaning.

01
The permeate extraction pump draws from the collection side.
02
Valves redirect permeate back toward the hollow shafts and disc pack.
03
The reverse flow crosses the filtering elements and helps release accumulated material from the surface.
04
The controls return the equipment to its configured filtration path after the backwash phase.

Dosing pump → cleaning circuit → filtration surfaces

CIP chemical cleaning

Clean-in-place uses a chemical dosing pump for cleaning products. It is a separate cleaning function from permeate backwash; the chemical recipe and sequence depend on the installed configuration.

01
The control system selects the CIP phase and its configured valve positions.
02
A peristaltic dosing pump adds the specified cleaning product to the CIP circuit.
03
Cleaning liquid contacts the filtration path according to the installation’s CIP procedure.
04
The equipment is returned to its operating configuration after the configured cleaning sequence.

Technical references & drawing scope

This educational drawing follows the manufacturer's published system schematic and filtration principle. It represents one disc bank; actual configurations, dimensions, disc materials and connections vary by model.

TMCI Padovan Dynamos brochure
Manufacturer brochure. Pages 2–5 describe construction, components and working principles; pages 6–7 describe operating advantages and show the disc filtration scheme.
DPTI Dynamos brochure copy
Local product reference supplied with the DPTI site content. Use alongside the manufacturer brochure when checking the product page.

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