Price of 30m³/h & 50m³/h dissolved air flotation Units | Transparent Factory Quotations from TNW Co., Ltd to Avoid Procurement Pitfalls
30m³/h and 50m³/h DAF units are the most widely used pretreatment equipment for food slaughterhouses, machining plants, printing & sand washing factories, and medium-small township sewage stations. Many purchasers are confused by huge price gaps between suppliers for the same rated throughput. Cheap outsourced assembled units cut corners on plate thickness, dissolved air systems, automatic scum skimmers and electrical control systems. Within two to three months, they suffer frequent releaser clogging, tank corrosion and leakage, incomplete scum removal, and unqualified oil & suspended solids in effluent. Hidden costs from downtime maintenance, extra chemical consumption and environmental rectification far exceed the initial price savings.
For genuine, transparent factory prices without hidden charges, choose direct manufacturers with in-house production. TNW Co., Ltd specializes in DAF manufacturing. All 30m³/h and 50m³/h horizontal DAF units are fully fabricated, assembled and full-load water tested before delivery. Below we break down pricing composition, configuration tiers and applicable working conditions for accurate budget planning by contractors and plant managers.
1. Basic Price Gap Between 30m³/h and 50m³/h Models
50m³/h DAFs feature larger tank volume, bigger dissolved air vessels, wider skimmers and oversized pumps & valves, consuming more stainless steel plates, motors and piping. With identical material and automation specs, the factory price of a 50m³/h unit is generally 20%–35% higher than a 30m³/h unit.
However, throughput is not the only pricing factor. Tank material, core dissolved air components, automation grade and matching dosing units are the primary drivers of price differences, often overlooked by buyers.
2. Three Material Grades with Clear Price Ranges for TNW 30m³/h & 50m³/h DAFs
1) Carbon steel epoxy coated basic model (for short-term neutral wastewater projects with limited budget)
Suitable for temporary construction sites, light cleaning wastewater and short-run production without strong acid, alkali or high salinity.
30m³/h carbon steel basic version: Simplified manual control with standard dissolved air tank and basic skimming chains, no PLC linkage.
50m³/h carbon steel basic version: Larger tank and higher-power dissolved air pump at a higher price tier.
Drawbacks: Carbon steel corrodes easily after 2–3 years of continuous submersion, poor resistance to oil, acid and alkali. Equipped with low-cost plastic releasers prone to clogging. Only recommended for temporary use, not long-term continuous production facilities.
2) Full 304 stainless steel standard model (mainstream choice for 90% of customers)
Universal for municipal sewage, food slaughter wastewater, metal cutting fluid and general printing effluent. All wetted parts including tanks, dissolved air vessels, releasers, skimmer rakes and pipelines use thickened 304 stainless steel with passivated anti-rust welds. Air solubility exceeds 85% with anti-clog stainless steel T-type releasers and high-pressure self-cleaning spray systems, supporting stable operation for over 8 years.
30m³/h 304 stainless steel manual model: Cost-effective for intermittent production with short daily runtime.
30m³/h 304 stainless steel fully automatic PLC model: Variable-frequency control with liquid level interlock, connectable to PAM dosing units.
50m³/h 304 stainless steel manual model: For medium-small plants with stable daily flow and no need for 24-hour supervision.
50m³/h 304 stainless steel automatic linked model: Top pick for general contractors’ complete projects, enabling unattended round-the-clock operation and 20%+ chemical savings.
TNW keeps large stock of these standard models, with prices 20%–40% lower than distributors with no middleman markup.
3) 316L stainless steel heavy anti-corrosion premium model (specialized for chemical, electroplating and coastal high-salinity wastewater)
All wetted components upgraded to 316 stainless steel to resist chloride ions, pickling effluent and emulsified oil without perforation or leakage after long-term immersion. Optional accessories include explosion-proof electrical control, full-unit heat tracing and thickened wear-resistant transmission chains. The price is 40%–70% higher than equivalent 304 stainless steel units. Custom 316L versions are available for both 30m³/h and 50m³/h DAFs, reducing annual spare part replacement costs for highly corrosive long-term operations.
3. How Automation & Supporting Packages Alter Final Transaction Prices
Many suppliers only quote bare machines, with separate surcharges for dosing units, delivery, installation and commissioning that blow budgets. TNW quotations list every item explicitly with two procurement modes for clear comparison:
Bare DAF unit: Only main tank, basic pumps, valves and simple electrical control, no dosing equipment. Suitable for clients with existing dosing systems but requires cross-supplier coordination for linkage debugging. Lowest upfront price.
Integrated complete package (DAF + three-chamber PAM dosing unit): Pre-calibrated linkage and PLC signal communication at the factory, ready for commissioning once water and power are connected on site. Bundled purchase enjoys package discounts with lower overall cost than separate procurement, the most popular solution for engineering projects.
Optional add-ons with separate pricing: variable-frequency automatic skimming, remote control, sludge conveying screw, winter heat tracing, explosion-proof electrical components, no mandatory bundled purchases.
4. Matching Application Scenarios for 30m³/h and 50m³/h DAFs to Avoid Budget Waste
Applicable projects for 30m³/h DAF
Medium-small food processing plants, prefabricated food workshops and small slaughterhouses
Community & township mini sewage stations, centralized catering wastewater pretreatment
Small machining, hardware cleaning and laboratory wastewater
Old sewage equipment renovation with limited space and daily flow under 30 cubic meters
Applicable projects for 50m³/h DAF
Medium printing, washing and paper mills with fluctuating water output
Large-scale sand washing plants and river dredging slurry pretreatment
County-level medium sewage plants and industrial park comprehensive wastewater stations
Facilities with future expansion plans, reserving treatment capacity to avoid secondary equipment replacement soon
5. Price Advantages of Direct Factory Supply vs Distributors
Distributors typically mark up medium-sized DAFs by 25%–40% with numerous hidden extra fees. As a full-scale manufacturer, TNW delivers clear benefits:
Bulk procurement of stainless steel plates, dissolved air pumps and electrical components eliminates multi-layer distributor profit margins, offering lower prices under identical material and configuration standards.
Ready stock for 30/50m³/h 304 stainless steel automatic models with priority scheduling for urgent renovation projects and no rush surcharges.
Detailed quotations list plate thickness, motor brands, releaser specifications, delivery fees, on-site commissioning and warranty coverage. Delivery, installation and training can be packaged on demand with no hidden charges.
Complete warranty terms formalized in purchase contracts: free pre-sales water quality testing, site surveys and customized budget proposals; nationwide technicians for on-site installation, commissioning and hands-on operator training; 12-month warranty on core parts including dissolved air pumps, skimming drives and PLC systems; genuine wear parts supplied long-term at factory cost.
6. Key Procurement Tips to Avoid Pitfalls
Do not judge solely by bare-machine low prices: Cheap units use thin plates, plastic releasers and no self-cleaning spray, with maintenance costs exceeding price gaps within 1–2 years.
Prioritize 304 stainless steel automatic models for high-oil and fiber-rich printing/food wastewater; carbon steel versions fail rapidly in such conditions.
Select PLC-linked complete packages for 24-hour continuous operation to cut long-term chemical and labor expenses.
Upgrade to 316L stainless steel for coastal or chemical pickling wastewater with sufficient budget to avoid costly full equipment replacement due to later corrosion leakage.
Send wastewater samples to TNW for free lab testing if unsure about suitable materials and configurations. We deliver accurate budget plans without over-specifying to inflate costs.
Conclusion
There is no fixed standard price for 30m³/h and 50m³/h DAF units. Final budgets depend on tank material, automation level, supporting equipment and wastewater characteristics. Purchasers should evaluate total 5–8 year costs including operation, maintenance, chemicals and downtime losses, rather than only upfront investment.
TNW self-manufactures 30m³/h and 50m³/h horizontal DAF units with tiered material options, flexible automation configurations and complete supporting equipment. Factory-direct transparent pricing without distributor markup suits medium-small wastewater pretreatment across food, printing, chemical, municipal and sand washing industries.
Share your daily treatment capacity, wastewater type and machine room dimensions with TNW technical staff for free customized configuration schemes and detailed factory quotations.