Axtron Pressure Vessel 8x18 (Model 818) – FRP Tank for Sand, Carbon, Arsenic & Softener Media, Made in China
The Axtron Pressure Vessel 8x18 (Model 818) is an empty FRP (Fiberglass Reinforced Plastic) tank used as the housing for media-based filtration and water treatment in commercial RO plants. It's sold as the vessel only — you fill it with whatever media your application requires, whether that's sand for sediment filtration, activated carbon for dechlorination, arsenic removal media, water softener resin, or gravel as an underbedding layer.
Multi-Purpose by Design
Because this is an empty vessel, one tank design supports several different treatment functions depending on what you load it with:
- Sand: For sediment and turbidity removal in larger-scale pre-filtration.
- Carbon (GAC or similar): For chlorine, taste, and odor removal ahead of an RO membrane.
- Arsenic removal media: For treating groundwater with elevated arsenic levels — a documented concern in parts of Pakistan's groundwater supply.
- Water softener resin: For hardness removal via ion exchange.
- Gravel: Commonly used as a support/underbedding layer beneath the primary media, protecting the bottom distributor from media loss.
This vessel does not include media, a distributor tube, or a control valve — those are selected and purchased separately based on your specific application.
Operating Specifications (From Manufacturer Label)
| Specification | Detail |
|---|---|
| Brand | Axtron |
| Model | 818 (8 inch diameter x 18 inch height, nominal) |
| Origin | Made in China |
| Construction | FRP (Fiberglass Reinforced Plastic) — standard construction for this vessel type |
| Max Pressure | 150 PSI (10 Bar) |
| Operating Temperature | 34–120°F (1–49°C) |
| Max Vacuum | 5" Hg (127mmHg) |
| Approved Use | Water treatment applications only |
| Not Approved For | Pneumatic or hydro-pneumatic applications |
| Minimum Exposure Temperature | Must not be exposed below -17°F (-27°C) |
| Colors Available | Blue, Natural (Transparent) |
Important: Do not exceed the specifications listed above — this is stated directly on the manufacturer's label as a safety requirement, not just a recommendation.
Who This Is For
Commercial RO plant builders, water treatment technicians, and dealers assembling custom filtration systems for sand filtration, carbon filtration, arsenic remediation, or water softening applications.
Frequently Asked Questions
Q1: Does this vessel come with filter media included?
No — this is the empty vessel only. You select and fill it with the media appropriate for your application (sand, carbon, arsenic removal media, softener resin, or gravel), purchased separately.
Q2: What is this vessel made of?
FRP (Fiberglass Reinforced Plastic) — the standard construction for this type and size of pressure vessel in water treatment applications.
Q3: What's the maximum operating pressure?
150 PSI (10 Bar), per the manufacturer's specification label.
Q4: What temperature range is this rated for?
34–120°F (1–49°C) for operation. It must not be exposed to temperatures below -17°F (-27°C), even when not in use.
Q5: Can this be used for pneumatic or air pressure applications?
No — the manufacturer explicitly states this vessel is approved for water treatment use only, and must not be used for pneumatic or hydro-pneumatic applications.
Q6: What does "8x18" mean?
It refers to the vessel's nominal size — 8 inches in diameter by 18 inches in height — a standard sizing convention for this type of pressure vessel.
Q7: What color options are available?
Blue and Natural (transparent).
Q8: Is delivery available across Pakistan?
Yes, Axtron Pakistan offers nationwide delivery, including Karachi, Lahore, Islamabad, Rawalpindi, Faisalabad, and Multan.