DERFLEX manufactures flexible water tanks, collapsible water storage tanks and portable water bladders for B2B buyers, distributors and project contractors. PVC and TPU coated fabrics can be matched to tank style, capacity, folding cycle, water-contact requirements, valves, fittings and export-order specifications.
The product family can include closed pillow tanks, water bladders, rectangular / cube-style tanks, self-supporting field tanks and custom flexible storage systems. The manufacturer must match tank geometry, coated fabric, weld construction, fittings and accessories to the intended capacity, site and service cycle—not simply cut one generic material into different sizes.
This page is intentionally broader than DERFLEX's heavy-duty tarpaulin tank page. Here, the focus is the complete flexible water tank product family and the manufacturing / OEM process: product format, PVC vs TPU, custom capacity, fittings, branding, export packing and repeat-order consistency.
The correct tank format depends on whether the buyer prioritizes enclosed storage, fast field access, compact transport, a fixed footprint or repeated deployment.
A closed low-profile flexible tank for portable water storage, construction, agriculture, emergency response and other temporary storage programs.
A broad bladder-tank format for mobile, temporary and remote water storage. Shape and connection layout can be adjusted to the available installation area.
A more defined footprint for projects where usable floor area, transport packaging or connection position must be planned in advance.
Open or covered collapsible tank concepts can be used where rapid access, fast filling and temporary field deployment are more important than fully closed storage.
Smaller flexible tanks can support vehicles, remote work, agriculture, service crews and emergency kits when empty-space efficiency matters.
DERFLEX can discuss non-standard capacity, footprint, connection layout, color, marking, accessories and packing for distributors and project buyers.
DERFLEX works with both PVC and TPU coated technical fabrics. The best material depends on the end use, water-contact requirement, folding cycle, temperature, abrasion exposure, weld route and commercial target.
Material note: potable-water, food-contact or industrial-liquid suitability must be confirmed against the exact material formulation, fittings, finished tank and destination-market requirements. “PVC” or “TPU” alone is not a certification.
A manufacturer should control more than welding. The order starts with the application specification and ends with a repeatable production package for the finished tank.
Confirm capacity, water / liquid, available footprint, temperature, deployment cycle, quantity and destination market.
Choose pillow, bladder, rectangular / cube, open field tank or a custom shape based on filling method and site use.
Select PVC or TPU coated fabric, thickness, reinforcement, surface function and color around the project requirement.
Develop panel geometry, seam overlap and compatible welding parameters around the tank size and coated fabric.
Position inlets, outlets, vents and high-stress reinforcement before final assembly.
Check workmanship, dimensions, seams, fittings, accessories, labels and folding / packing instructions before shipment.
DERFLEX's existing flexible-water-bladder product family includes PVC / TPU options, multiple shapes and broad capacity ranges. These figures are useful as a starting point, but the final quotation should carry the confirmed project specification.
| Item | Existing DERFLEX Family Reference | Buyer Note |
|---|---|---|
| Material | PVC / TPU coated flexible material | Select according to water contact, folding cycle, temperature, abrasion, weld process and budget. |
| Capacity | Approximately 500–500,000 L in existing flexible-bladder references | Very large tanks require filled-dimension, ground-load and seam-stress review. |
| Thickness | Approximately 0.75–1.20 mm in existing flexible-bladder references | Thickness is only one variable; reinforcement and seam design matter as well. |
| Tank Shapes | Square / rectangular, pillow / bladder and tapered / foldable directions | Final geometry should be selected around site footprint and operating method. |
| Color | Blue, orange, military green and custom colors in existing references | Private-label colors can be discussed subject to material and order quantity. |
| Welding Example | A DERFLEX 2 m3 bladder uses 0.9 mm PVC double-sided coated material with high-frequency welding | Weld process must be compatible with the selected coated fabric and tank construction. |
| Connections | Custom inlet, outlet, vent and valve layouts can be discussed | Send hose / pump connection requirements at RFQ stage. |
| OEM | Custom dimensions, color, logo, accessories and packing | Best for distributors, contractors and repeat project procurement. |
Important: published legacy specifications on DERFLEX pages represent individual or historical product directions. Confirm the current material, finished-tank specification and compliance requirements on the quotation / technical data sheet before ordering.
Seasonal field storage, irrigation scheduling, livestock supply, remote farm water and drought-response programs.
Temporary site water, dust suppression, wash water and remote project supply where rigid-tank transport is inefficient.
Rapid-deployment water reserve for temporary camps, disrupted infrastructure and disaster-response programs.
Temporary water staging where quick deployment and connection to hoses / pumps are required. Local fire-service requirements must be confirmed.
Vehicle-supported, mountain, mining, remote maintenance and field-service applications where the empty tank must pack compactly.
Process water, wash water and selected temporary industrial storage can be reviewed. Chemical compatibility must be confirmed before non-water use.
Existing DERFLEX products illustrate different sizes, colors and installation contexts for portable flexible water storage.
For B2B sourcing, the strongest comparison is not simply unit price. Ask whether the supplier can explain the relationship between tank format, material, seam construction, fittings and your actual deployment conditions.
For distributors and long-term project buyers, DERFLEX can discuss a repeatable product package instead of treating every shipment as a one-off tank.
For a new private-label range, start with 3–5 target capacities and one or two application groups rather than requesting dozens of unrelated SKUs. This makes material, accessories, packaging and repeat-order QC easier to standardize.
Example direction: portable construction / agriculture line + emergency water line, each with clearly defined material and connection specifications.
A complete inquiry lets DERFLEX recommend tank format, material and fittings before price comparison.
A flexible water tank is a foldable liquid-storage system made from reinforced coated fabric. Unlike a rigid steel or plastic tank, it can collapse when empty for compact transport and storage. Common formats include pillow tanks, water bladders, rectangular / cube tanks and self-supporting field tanks.
DERFLEX supplies PVC and TPU coated technical fabric directions used in flexible tanks and water bladders. The appropriate material should be selected according to water-contact requirements, folding cycle, temperature, abrasion exposure, welding method and project budget.
Existing DERFLEX flexible-bladder references include capacities from approximately 500 L to 500,000 L. The practical capacity for a specific product depends on tank shape, filled height, material construction, available footprint, seams, fittings and site conditions.
Yes. Custom projects can discuss usable capacity, length, width, filled-height target, tank format, valve layout, color, logo, accessories and packing. For unusual footprints, provide a drawing or maximum installation dimensions.
“Flexible water tank” is the broader product category. A water bladder is usually a closed flexible tank that expands as it fills. Other flexible tank formats can include self-supporting open tanks, rectangular / cube designs and frame-supported systems.
Yes. Portability is one of the main advantages of flexible tanks because the empty unit can be folded into a much smaller volume than a rigid tank. Actual handling weight depends on tank size, material, fittings and accessories.
Only when the selected coated fabric, fittings and finished tank meet the required potable-water / food-contact standard for the destination market and intended contact conditions. Potable-water suitability should be confirmed specifically before ordering.
Material compatibility must be evaluated case by case. A standard water bladder should not be assumed suitable for fuel, solvents or chemicals. Provide the exact liquid, concentration, pH, temperature and contact time before material approval.
Compatible coated fabrics can be joined using high-frequency / RF welding or other suitable thermal welding methods. DERFLEX has an existing 2 m3 bladder example made from 0.9 mm double-sided PVC coated material using high-frequency welding. Welding parameters should be validated for the selected construction.
Yes. OEM programs can discuss standard capacity sets, private-label branding, custom colors, fittings, repair accessories, labels, packaging and repeat-order specifications. A sample approval stage is recommended before larger repeat orders.
Send the stored water / liquid, required usable capacity, tank style, available footprint, material preference, temperature, connection sizes, deployment frequency, quantity, branding requirements and delivery destination.
Send your tank capacity, application, site footprint, PVC / TPU preference, valve details, order quantity and destination. DERFLEX can review the tank format, coated-fabric direction, OEM requirements and export-order configuration before quotation.