Fine Bubble Tube
Diffusers
LiTENDA manufactures EPDM and silicone tube diffusers built for long, narrow aeration tanks — engineered for low pressure loss, even bubble distribution, and dependable performance across municipal, industrial, and aquaculture applications.
Built for Long,
Narrow Aeration Tanks
A tube diffuser is an aeration device that disperses fine air bubbles along a slender membrane, making it the natural choice for tanks that are long and narrow rather than wide and shallow — a layout where disc diffusers leave gaps in coverage.
LiTENDA's tube diffusers pair an EPDM or silicone membrane with a reusable ABS support tube, so only the membrane needs replacing at end of life rather than the whole fitting. Diffusers can be mounted singly or in pairs, with adapters available for both round and rectangular header pipes.
Every unit goes through batch testing before shipment, and our team can match diameter, length, and connector thread to your existing tank layout — just send us your dimensions for a free configuration check.
Free configuration check — send your tank dimensions for a tailored tube diffuser layout.
Tube Diffuser Advantages
Every detail of the build — from the membrane formula to the slit geometry — is chosen to extend service life and protect aeration efficiency.
Tube Diffuser Specifications
Three diameters cover small, medium, and large aeration tank requirements.
| Parameter | TD-63 | TD-93 | TD-113 |
|---|---|---|---|
| Tube Diameter | 63 mm (2.5") | 93 mm (3.5") | 113 mm (4.5") |
| Bubble Type | Fine Bubble | Fine Bubble | Fine Bubble |
| Membrane Material | UV-protected EPDM (imported formula) / Silicone | ||
| Support Tube | UV-protected ABS | ||
| Length Options | 500 / 750 / 1000 mm | ||
| Connector | 3/4" NPT | ||
| Flow Range | 2–14 m³/h | 5–20 m³/h | 6–28 m³/h |
| Bubble Size | 1–2 mm | ||
| Service Area | 0.75–2.5 m² | 1.0–3.0 m² | 1.5–2.5 m² |
Component Construction
Every tube diffuser is built from three core parts working together — the membrane sleeve, the support tube, and a large/small end fitting system designed for stable, leak-free operation.
The membrane sleeve — made from EPDM, silicone, or TPU rubber — is secured to the support tube with a 304 stainless steel clamp for a tight, corrosion-resistant seal. Beneath the membrane sits an ABS engineering plastic support tube lining, chosen for its strength and resistance to chemical attack from wastewater.
Advanced Tube Diffuser System
Designed for high oxygen transfer efficiency at a balanced cost — the LiTENDA system pairs a durable membrane with a finned, easy-install end-cap design.
Suitable across municipal wastewater, animal slaughter and processing, food processing, and beverage production lines with EPDM membranes — while silicone variants extend coverage into pulp & paper, petrochemical, and refining process wastewater. Thread options include 3/4" NPT Male Thread (DN20 = 25mm) and 1" NPT Male Thread (DN25 = 32mm) to match your existing piping.
Specification Table for Tube Diffusers
Full technical breakdown across all three diameter options — use this table to confirm flow range, headloss, and service area before you place an order.
| Type | LTD63 | LTD93 | LTD113 |
|---|---|---|---|
| Bubble Type | Fine Bubble | Fine Bubble | Fine Bubble |
| Membrane Material | EPDM / Silicone / TPU | ||
| Membrane Hole Diameter | 1 mm | ||
| Support Tube Material | ABS | ||
| Support Tube Diameter | DN50 = 63mm (2.5") | DN80 = 93mm (3.5") | DN100 = 113mm (4") |
| Length | 500 / 750 / 1000 mm / Customized | ||
| Connector | 3/4" NPT Male / 1" NPT Male | ||
| Flow Range (m³/h) | 2.6–14.5 | 3.4–22 | 4.6–24 |
| SOTE (%, 4.5m submerged) | 27–33 | 25–31 | 24–30 |
| Headloss (Pa) | 2100–5800 | 5100–7800 | 6100–8900 |
| Bubble Size | 1–2 mm | ||
| Service Area (m²) | 0.75–2.5 | 1.0–3.0 | 1.5–2.5 |
| Effective Area (m²) | 0.2 | 0.295 | 0.358 |
| Service Life | > 5 years | ||
EPDM vs Silicone Membrane
Both membrane types are available across all three tube diameters — choose based on your wastewater profile and budget.
How to Pick the Right Diameter
Tube diameter should match your tank depth and treatment load — here's a quick reference.
Not sure which diameter fits your tank?
Send us your tank depth, length, and flow requirements — our engineers will recommend the right diffuser size and layout, free of charge.
Tube Diffuser Applications
Long, narrow-tank aeration makes tube diffusers a fit across a wide range of wastewater streams.
From Raw Material to Finished Diffuser
Every tube diffuser that leaves our Shenzhen facility passes through dedicated compounding, molding, and assembly stations before final inspection. Our production line runs at a scale that supports both small trial orders and large municipal contracts — without sacrificing the consistency that long-term aeration performance depends on. Below is a closer look at the materials, the manufacturing process, and the diffusers at work across different application sites.
Beyond the sectors shown above, LiTENDA tube diffusers are also deployed in chemical processing plants, food and beverage wastewater lines, and landfill leachate treatment systems — anywhere a long, narrow tank needs even, low-maintenance aeration. Our engineers can review your specific water chemistry and confirm membrane compatibility before you order.