Pasted Valve Paper Bags

Fast-Filling, Self-Sealing Bags for High-Speed Production Lines

Pasted valve bags are built with all sides pasted closed except for a small valve opening in one corner, used to fill the bag with product. Once filled, the weight and pressure of the product itself helps seal the valve closed, no additional sewing, taping, or manual closing required. That’s what makes pasted valve bags a favorite on high-speed, automated filling lines.

The design is efficient by nature. Because the bag arrives pre-formed and pre-sealed on three sides, filling lines can run faster with less labor and fewer steps between product and pallet. Bag Supply Company manufactures pasted valve bags using multiwall kraft construction, giving you a bag that fills fast and holds up to the demands of bulk dry product handling.

Why Choose Pasted Valve Bags

Built for speed. Pasted valve bags are designed for high-throughput, automated filling operations where every second on the line matters.

Self-sealing convenience. The valve closes under the weight of the product, cutting out the extra labor and equipment needed for sewing or taping shut an open-mouth bag.

Strong, multiwall construction. Multiple plies of kraft paper give the bag the strength to handle dense or heavy bulk products without tearing or failing under load.

Clean, professional appearance. With no visible stitching or tape, pasted valve bags present a smooth, finished look, well suited for branded and retail-facing products.

Sustainable material. Kraft paper is renewable and recyclable, making pasted valve bags a solid fit for companies prioritizing eco-conscious packaging.

Common Applications for Pasted Valve Bags

Pasted valve bags are widely used for dry, free-flowing, or fine bulk products, including:

Cement, mortar, and other construction materials that move through high-speed filling operations
Chemicals and industrial powders that need a secure, dust-tight seal
Animal feed and agricultural products produced and packaged at scale
Food-grade dry goods such as flour, sugar, and other fine or granular products
Minerals and aggregates that require a durable bag for bulk handling and transport

If your operation runs high-volume automated filling and your product is dry or fine-grained, a pasted valve bag is often the most efficient packaging choice.

Frequently Asked Questions

How does a pasted valve bag seal itself? The bag is pasted closed on all sides except a small valve opening. Product is filled through the valve, and the weight and pressure of the product help press the valve closed, creating a secure seal without additional sewing or taping.

Are pasted valve bags good for automated filling lines? Yes. They’re one of the most common choices for high-speed, automated filling because the pre-formed, self-sealing design keeps the line moving without extra closing steps.

What kinds of products work best in a pasted valve bag? Dry, free-flowing, or fine bulk products like cement, chemical powders, flour, and similar materials tend to fill and seal most effectively in a valve bag.

Can Bag Supply Company add custom printing to pasted valve bags? Yes. We offer high-quality custom printing so your branding and product information look sharp and consistent across every run.