Fast Filling · Dust‑Tight Valve

Valve Bags (Paper/PP Valve Sacks)

Our valve bags are engineered for high-speed automatic filling lines. Available in kraft paper, PP woven, or laminated structures. The self‑sealing valve prevents leakage and contamination, ideal for cement, dry mortar, chemicals, and food powders. Custom width, valve size, and multi‑color printing.

Valve Bag Specifications

Width Range

35 – 90 cm

GSM / Basis weight

70 – 150 GSM (PP / Kraft)

Base Colors & Materials

Natural PP White Black Kraft Paper Red Yellow

Self‑sealing valve (dust‑tight)

High-speed filling compatible

Valve size: 50–120 mm

Reinforced bottom & valve patch

Custom sizes & lamination available

Request Free Sample

Technical Specifications

Valve Bag Complete Parameters

Precision-engineered for automatic filling lines and heavy-duty applications.

Bag Width	35–90 cm (custom up to 100 cm)
Bag Length	45–120 cm (any size)
Valve Size	50–120 mm (custom valve position)
Material Options	Kraft paper, PP woven, laminated (BOPP/PE), multi-wall
GSM / Basis weight	PP: 70–150 GSM \| Kraft: 75–120 gsm
Tensile Strength	≥ 600N/50mm (PP woven)
Base Colors	Natural, White, Kraft, Black, Red, Yellow, Green, Blue + custom
Printing	Flexo up to 6 colors (solvent‑free inks)
Lamination	Unlaminated / Single or double side PE / BOPP lamination
Bottom & Valve Type	Self‑sealing valve, Hot‑melt valve, Reinforced pasted bottom
Capacity	10kg – 80kg (dry bulk goods)
Add‑ons	PE inner liner, degassing valve, UV stabilization, anti‑slip coating

ISO 9001:2024 | Custom valve bag solutions

Why Choose Us

Valve Bag Core Advantages

What makes our valve bags the right choice for your automatic filling lines and bulk packaging needs.

World‑Class Converting Lines

Starlinger / W&H equipment for consistent valve bag quality

Custom Width & Valve Size

Any dimension + precise valve positioning

In‑House Lab Testing

Burst / drop / valve seal & UV resistance tests

Fast Turnaround

15–25 days for standard; valve bag samples in 7 days

Industries We Serve

Valve Bag Applications

Trusted by automatic filling lines worldwide.

Cement & Mortar

Dry cement, ready‑mix, additives

Chemicals & Minerals

Powders, resins, silica, titanium dioxide

Food & Grain

Flour, sugar, starch, coffee beans

Animal Feed

Pet food, poultry, fish feed pellets

Plastics & Resins

Granules, masterbatch, recycled materials

Need a custom valve size, width or special printing?

Our engineers will design the perfect valve bag – any dimensions, any color, with your logo. Request free samples and technical data.

Get a Quote →

sales@weavota.com | +86 188 6776 8358

📦 Other Packaging Solutions

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Valve Bags (Paper/PP Valve Sacks)

Valve Bag Specifications

Valve Bag Complete Parameters