4'' FRP Vessel Tank
Opening: 4 inches
Product type: FRP Filter Tank
Material: Fiberglass
Core Components: Pressure Vessel
Certification: NSF, CE, ISO9001
OEM: Available
Filter media: Quartz Sand, Activated Carbon, Resin
Product Overview
A 4'' FRP Vessel Tank refers to a fiberglass storage tank with a 4-inch top opening. The 4-inch bottom opening is optional as well. The most common models with a 4-inch opening include: 1665, 1865, 2472, 3072, and 3672.
Ink-Blue Environmental Protection's FRP pressure tanks are made of corrosion-resistant glass fiber and a food-grade lining. They maintain long-term stability even under continuous operating pressure. They are widely used in various pretreatment systems, including sand filters, activated carbon filters, and softeners.
Structure & Materials
Tank Body Material: High-performance glass fiber winding molding
Inner Liner: Food-grade corrosion-resistant PE material
Max Operating Pressure: 10 bar
Burst Pressure Test: 40bar
Max Working Temperature: 49°C
Connection Type: Top opening / Top and bottom opening
Base Material: Reinforced plastics
Standard Color: Natural / Blue / Customized
Product Features: Corrosion resistance, high-temperature resistance, aging resistance, lightweight, and convenient transportation.
Application Fields: water supply and wastewater treatment industry, light industry, chemical industry, industrial boilers, electronics, petrochemicals, pharmaceuticals, food, and other industrial fields.
Size & Model Specifications of 1665, 1865, 2472, 3072, and 3672
Specifications chart:
| Model | Size(inch) | Diameter(mm) | Capacity(L) | Flow(m³/h) | Fillable quartz sand(kg) | Fillable activated carbon(kg) | Fillable resin(kg) |
| 1665-4T | 16*65 | Φ428*1668 | 190 | 1.5-3 | 245 | 70 | 105 |
| 1665-4T4B | 16*65 | Φ418*1877 | 190 | 1.5-3 | 245 | 70 | 105 |
| 1865-4T | 18*65 | Φ465*1655 | 235 | 2-3.5 | 300 | 85 | 130 |
| 1865-4T4B | 18*65 | Φ465*1873 | 235 | 2-3.5 | 300 | 85 | 130 |
| 2472-4T | 24*72 | Φ614*1884 | 460 | 3.5-5.5 | 590 | 165 | 260 |
| 2472-4T4B | 24*72 | Φ614*2080 | 460 | 3.5-5.5 | 590 | 165 | 260 |
| 3072-4T | 30*72 | Φ765*1844 | 697 | 6-8 | 890 | 250 | 390 |
| 3072-4T4B | 30*72 | Φ765*2035 | 697 | 6-8 | 890 | 250 | 390 |
| 3672 4T4B | 36*72 | Φ909*2090 | 970 | 9-11 | 1240 | 350 | 545 |
Parameter description:
"1665-4T" indicates a 4-inch top-opening 1665 model; "1665-4T4B" indicates a 4-inch top-and-bottom-opening 1665 model. This list only includes specifications for 5 models. For a complete table of all models, please contact us for the FRP vessel tank data sheet.
The amount of filter media that can be filled is calculated based on the tank's capacity. For detailed calculation methods, please refer to this blog: How to Calculate FRP Tank Media Capacity?
Accessory list
Standard:
The standard storage tank only includes the tank itself, the opening, and the base.
4-inch FRP tank opening:
4-inch FRP tank base:
A complete set:
A complete set should also include core components such as water distributor, automatic valve, and central pipe, which are not included by default. If you require these to be included, please specify when requesting a quote.
Why does a 4'' FRP Vessel Tank need the bottom opening as well?
Wastewater Discharge: The bottom opening allows quick discharge of wastewater and flushing fluid, helping remove accumulated solids and restore filtration efficiency.
Easy Cleaning & Maintenance: It enables fast cleaning, chemical dosing, and convenient media replacement or system inspection.
Device Connection: The bottom port provides space to connect devices such as pressure relief valves, auto drains, or monitoring components.
Better Flow Distribution: Bottom inlet design improves horizontal flow distribution, reduces channeling, and enhances overall filtration performance.
Quality Assurance & Certifications
Quality Inspection:
Before leaving the factory, we conduct three quality inspections. These are:
Each FRP vessel tank must undergo a hydrostatic pressure test of 1.2 times the rated pressure.
A fatigue test of 100,000 cycles was conducted to ensure the durability of the tank.
More than 4 burst pressure tests were conducted, with the test pressure being 4 times the working pressure.
Our Certificate:
NSF
CE
ISO9001
Procurement information for FRP pressure vessels:
Production cycle: 3-7 working days
Shipping time: Depends on the shipping method. By sea, it's generally 20-30 days, depending on the shipping company and customs clearance.
MOQ: 10
Payment terms: T/T, L/C
Quality certifications: NSF, CE, ISO9001
Product colors: Original color and blue are standard colors; other colors require customization.
About INK-BLUE Environmental Protection
We are a comprehensive company specializing in the production and sales of water treatment equipment and accessories. Our main product lines include FRP vessel tanks, membrane housings, filter cartridges, and complete RO equipment sets.
We have a professional engineering and sales team that can provide rapid quotations within 24 hours and offer customized water treatment design solutions based on the customer's specific raw water conditions, as well as custom-made water treatment equipment.
All of Ink-blue's products come with a 5-year warranty and lifetime after-sales service, helping customers expand their markets without worry.
Our on-time delivery rate is 90% or higher, and our customers are located worldwide.
FAQ
Q: What Water Treatment Scenarios Are 4'' FRP Vessel Tanks Suitable For?
A: Primarily for pre-filtration, including industrial boiler water softening, electronics pure water prep, food factory raw water turbidity removal, and chemical/acid-alkali wastewater treatment. Model selection depends on flow rate (1.5-11m³/h; refer to the technical table).
Q: How To Choose Between 1665, 1865, And 2472 Models?
A: Focus on flow requirements:
- 1.5-3m³/h: 1665 (small-scale);
- 2-3.5m³/h: 1865 (medium factories);
- 3.5-5.5m³/h: 2472 (medium industrial projects);
- 6-11m³/h: 3072/3672 (large factories/parks).
Q: Is The Bottom Port Mandatory? What If Not Installed?
A: Optional, but recommended for large-flow systems (>6m³/h). Without it, wastewater discharge must be done via the top port, reducing efficiency; long-term operation may accelerate filter media performance decline.
Q: Is The PE Liner Safe For Food Industry Use?
A: Yes. The liner uses food-grade corrosion-resistant PE, complying with food contact safety standards, making it suitable for food factory pre-filtration (e.g., beverage/dairy plants).
Q: What Happens If The Working Temperature Exceeds 49℃?
A: Operation at ≤49℃ is advised. Prolonged overheating may accelerate resin aging and affect pressure resistance. Custom high-temperature models are available for higher temperatures (e.g., 60℃).
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