Pureflow Bio · Manufacturer in India
Overflow Launders
Overflow launders collect water crossing a defined weir and route it to an outlet. Pureflow Bio manufactures custom launder arrangements in India for tanks and aquatic treatment vessels.
What are Overflow Launders?
An overflow launder collects water passing over an agreed weir arrangement and carries it towards the specified outlet.
Overflow Launders applications
Fish tanks and hatcheries
Best for collecting a specified overflow at a controlled vessel level.
RAS treatment vessels
Best for coordinating collection channels with the downstream flow route.
Custom aquarium projects
Best for a fabricated overflow that follows the approved exhibit geometry.
How Overflow Launders work
Set the overflow level
Install the agreed weir geometry relative to the working water level.
Collect the overflow
Water crosses the weir into the collection channel.
Discharge through the outlet
The channel carries water to the specified downstream connection without unintended backing up.
Overflow Launders features and benefits
Project-matched weir
Relates the collection edge to the operating water level.
Defined channel section
Provides space for the agreed design flow.
Fabricated connection layout
Aligns the outlet with the receiving equipment.
Accessible collection route
Supports debris inspection and cleaning.
Overflow Launders gallery
Explore equipment views and configuration examples. Images do not define the complete scope of supply or document a verified customer installation.
Overflow Launders — assembly view
Overflow Launders — configuration example
Overflow Launders — equipment detail
Overflow Launders models and specifications
The catalogue lists launder dimensions within radial flow settler models, not as standalone launder ratings. Those settler dimensions are not presented as a universal launder model table.
| Selection item | What the quotation must define |
|---|---|
| Peak overflow rate | Confirm for the proposed application and selected configuration |
| Available weir length | Confirm for the proposed application and selected configuration |
| Working level and allowable head rise | Confirm for the proposed application and selected configuration |
| Channel width, depth and slope | Confirm for the proposed application and selected configuration |
| Outlet size, downstream level and blockage access | Confirm for the proposed application and selected configuration |
Configuration and supply details
Confirm materials, connection standard, dimensions, electrical requirements and included components for the selected equipment. The quotation defines current pricing and the approved scope.
Optional components
- Weir profile and outlet geometry to approved drawing
Options are supplied only when included in the agreed quotation.
How to select Overflow Launders
A launder must be reviewed with its weir and outlet hydraulic conditions; the outlet diameter alone is insufficient.
- Peak overflow rate
- Available weir length
- Working level and allowable head rise
- Channel width, depth and slope
- Outlet size, downstream level and blockage access
Build your overflow launders enquiry brief
Record your design requirements for review. This tool does not calculate an unverified treatment capacity or automatically approve a model.
Overflow Launders installation and maintenance
Installation and integration
Level the weir to the approved datum and support the channel adequately. Check the maximum downstream water level and provide an accessible debris-removal route.
Routine maintenance
Inspect weir edges and outlets for blockage. Remove debris and confirm the channel remains supported and level after maintenance.
Warranty, dispatch and installation
One-year equipment warranty
Confirm coverage and operating requirements in the quotation.
Dispatch within 15 working days
Dispatch follows order confirmation. Transport and site delivery time are additional.
Made in India
Manufactured by Pureflow Bio in Mysuru, Karnataka. Installation, commissioning and service across India are agreed for your project.
For complete turnkey projects, confirm the project schedule, utilities, site preparation, installation and commissioning responsibilities separately.
Request a Overflow Launders quote
Share your application, preferred model and site requirements. Pureflow Bio will confirm the selected configuration and scope in your quotation.
Overflow Launders FAQs
What is an overflow launder?
It is a channel or trough along the edge of a tank or settler that collects water spilling evenly over a weir. It controls the water level and takes water off the surface, where floating debris and scum collect.
Why use a launder instead of a single outlet pipe?
A long, level weir draws water evenly from the whole tank, so you don't get dead zones or one strong current pulling fish and feed towards a single pipe. It also skims the surface better.
Where are overflow launders used?
In fish tanks and hatcheries, radial flow settlers in RAS, and custom aquarium tanks that need an even overflow to a sump.
How is a launder sized?
From the flow it must carry and the length of weir available. We fabricate launders to suit each tank or settler, so tell us the tank dimensions and flow.
Plan your complete aquaculture or aquarium system
Connect overflow launders to the wider treatment process
Discuss equipment integration, utilities and a coordinated project scope with Pureflow Bio.