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Multi-Wall Paper Valve Bags

Our multi-wall paper valve bags are a proven packaging solution for manufacturers handling dry flowable products that require clean, efficient, and high-speed filling.

Built using sustainably sourced paper plies and optional barrier films, each valve sack is engineered for durability, consistent performance, and reliable palletization in demanding industrial environments.

Through precise construction and rigorous quality control, our valve bags support efficient filling processes while delivering long-term value across production, storage, and transportation.

PVSE Valve Bags: Built for Speed, Accuracy, and Durability

A Pasted Valve Stepped End (PVSE) multi-wall paper bag is one of the most widely used valve sack styles in industrial packaging.

Designed for automated, high-speed filling equipment, product enters the bag through a horizontal filling spout using air, impeller, or auger systems.

Once the bag is released from the filling spout, internal product pressure causes the valve to self-seal, eliminating additional closing steps and improving line efficiency.

This construction creates a clean, squared-up package that:

Palletizes securely
Maintains consistent shape
Allows printing on side or end panels for easy identification in pallet loads

Valve Types

Valve bags are filled through an opening located in the top corner of the bag. Product is pumped or forced into the bag via air pressure, impeller, or auger. When the bag is expelled from the filling equipment, the internal forces exerted by the contents prompt the opening of the valve bag to self-seal. This self-sealing design enables secure containment and streamlined handling from fill to final delivery.

Bags with valves can be equipped with different valve or “sleeve“ types. Each sleeve type performs the same basic function. However, the proper sleeve type for your product and packing equipment needs to be evaluated when designing a valve bag. Our valve type capabilities include:

Double Trap
Reinforcing Strip
Paper Tube Insert
Reinforced Poly Lock
Tuck-In
Hinged Tuck-In
Sonic/Heat Seal
Double Trap Sonic Seal
Reduced Sleeve

Poly Lock

Sonic Seal

Tuck In

PVSE Valve Bags for Food & Ingredient Packaging

Food and ingredient processors rely on multi-wall paper valve bags to package fine, dry flowable products on high-speed filling lines. The self-sealing valve closes under product pressure once the bag leaves the filling spout, containing fine powders without a separate closing step. This keeps lines moving and reduces product loss. For manufacturers in the food packaging industry, PVSE bags offer a clean, square, stackable package that holds its shape from filling line to warehouse.

Common Food Ingredient Applications

Flour and milled grain products (paper flour bags)
Granulated and powdered sugar
Corn starch and other food starches
Powdered ingredient blends and mixes

Moisture Barrier Options for Food Ingredients

Hygroscopic ingredients like sugar and flour absorb moisture quickly, leading to caking, clumping, and a shorter shelf life. Barrier selection should match the ingredient's moisture sensitivity and the conditions it will face in storage and transit. The first option is PE laminated to the inner ply; the second option is a coated sheet; a third is PE film with free film between the paper plies. Perforated paper speeds air evacuation during high-speed filling, so specify the perforation pattern and barrier ply together for moisture-sensitive ingredients.

Choosing 2-Ply vs. 3-Ply Paper Bags for Food Ingredients

Base ply count on fill weight, filling method, and handling conditions rather than habit.

2-ply construction uses high-performance extensible paper. It gets its strength from energy absorption rather than basis weight, which reduces paper usage and bag cost.
3-ply construction remains an option where a filling line or application calls for it. Traditional kraft paper gets its strength from heavier basis weight, and extensible paper can be included for added performance.

Either construction can be paired with a barrier ply when ingredient protection requires it

Food Safety Certifications

Southern Packaging supplies paper packaging backed by AIB International, FSSC 22000, and SQF certification. These certifications assure customers that bags are produced using proper, food-safe practices and provide food and ingredient manufacturers with documentation to support a food packaging safety audit.

Paper Types

Traditional Kraft Paper	High Performance Extensible Paper
Manufactured from short wood fiber	Manufactured from long wood fiber
Heavy, coarse sheet	Smooth sheet
Strength through high basis weight	Strength through superior energy absorption
Limited stretch	6-7% stretch
Low levels of porosity	High levels of porosity
Limited energy absorption	Superior energy absorption
Ideal for 3-4 ply bag construction	Ideal for 2 ply bag construction

Custom Multi-Wall Paper Packaging Solutions

Every filling line and product behaves differently. We offer fully customized valve bag packaging solutions engineered around your material characteristics, filling equipment, and logistics requirements.

Available bag styles include:

PVSE
SOM
PBOM
Webb PBOM
SOS
UN Certified
AIB

Minimum order quantities and artwork charges may apply. Lead times typically range from 4–16 weeks depending on bag construction and printing requirements.

Frequently Asked Questions

What is a pasted valve stepped end (PVSE) bag?

A PVSE bag is a multi-wall paper valve bag with a stepped end design used for packaging dry flowable products. It features a valve for high-speed filling and self-seals when discharged from the filling machine, offering secure containment and stackable square dimensions.

What products are commonly packaged in valve bags?

Valve bags are ideal for building materials, chemicals, minerals, and agricultural products. Their construction supports efficient high-speed filling and safe handling of dry flowable goods like cement, fertilizer, and industrial powders. Food and ingredient processors also use valve bags for flour, sugar, and food starches.

What valve types are available for multi-wall paper bags?

Southern Packaging offers several valve types including poly lock, sonic seal, tuck-in, double trap, and reinforcing strip options. The right valve depends on your product and filling method (air, impeller, auger, etc.).

Can your multi-wall valve bags be customized?

Yes. PVSE valve bags are commonly used for flour, sugar, starches, and other dry food ingredients. Moisture barrier plies protect hygroscopic ingredients, and the self-sealing valve contains fine powders during high-speed filling. Additional protection measures include sonic seal valves and hermetically sealed outer layers.