Valve Bags
25kg Moisture Proof PP Valve Bag with Self Adhesive Seal and Screen Printing for Packing Powder Waterproof
70g/m²-150g/m²BOPP, PE, PP, PP Woven FabricBag With Valve
Valve bags.
Valve bags are filled through a small sleeve in one corner and close themselves under the product's own pressure, so high-speed packers can fill them without sewing. Our square block-bottom construction stacks like a brick on the pallet and stays dust-tight in transit.
Product list
Valve Bags
Heavy Duty Bottom Gusset Bag Valve Pocket 25KG Capacity Moisture-proof Waterproof PP Agricultural Chemical Packaging
70g/m²-150g/m²BOPP, PE, PP, PP Woven FabricBag With Valve
Valve Bags
Custom Logo Square Bottom Laminated PP Woven Waterproof Cement Packing Bags Valve 25kg Capacity OEM Factory Low Price
70g/m²-150g/m²BOPP, PE, PP, PP Woven FabricBag With Valve
Valve Bags
Square Bottom Gusset Bag with Valve Pocket Durable 25KG Chemical Raw Material Packaging Waterproof OEM Factory
70g/m²-150g/m²BOPP, PE, PP, PP Woven FabricBag With Valve
Valve Bags
Heavy Duty Bottom Gusset Bag Valve Pocket 25KG Capacity Moisture-proof Black PP Customizable Agricultural Flour Fertilizer
70g/m²-150g/m²BOPP, PE, PP, PP Woven FabricBag With Valve
Valve Bags
Bottom Gusset Bag with Valve Pocket PP Woven Fabric 25KG Flour Fertilizer Feed Packaging Moisture-proof Waterproof
70g/m²-150g/m²BOPP, PE, PP, PP Woven FabricBag With Valve
Valve Bags
Heavy Duty Bottom Gusset Bag Valve Pocket 25KG Capacity Waterproof PP Agricultural Chemical Packaging Custom
70g/m²-150g/m²BOPP, PE, PP, PP Woven FabricBag With Valve
Valve Bags
Heavy Duty Heat Seal Bottom Gusset Bag Valve Pocket 25KG Capacity Moisture-proof PP Agricultural Chemical Packaging
70g/m²-150g/m²BOPP, PE, PP, PP Woven FabricBag With Valve
Valve Bags
Heavy Duty Bottom Gusset PP Waterproof Agricultural Chemical Packaging Bag Valve 25KG Capacity for Flour Feed
70g/m²-150g/m²BOPP, PE, PP, PP Woven FabricBag With Valve
Valve Bags
Custom-made Durable Two Layer LDPE Valve Bags Custom Logo Pad/Silk Screen Printing 25kg Powder Resin Fertilizer Agriculture Feed
70g/m²-150g/m²BOPP, PE, PP, PP Woven FabricBag With Valve
Valve Bags
Heavy Duty Bottom Gusset PP Agricultural Chemical Packaging Bag with Valve 25KG Capacity
70g/m²-150g/m²BOPP, PE, PP, PP Woven FabricBag With Valve
Valve Bags
Heavy Duty Square PP Agricultural Chemical Packaging Bag with Valve 25KG Capacity Moisture Proof Fertilizer & Feed
70g/m²-150g/m²BOPP, PE, PP, PP Woven FabricBag With Valve
Valve Bags
Custom-made Two Layer PP Waterproof Valve Bags with Heat Seal for 25kg Flour Feed Fertilizer or Resin Packing
70g/m²-150g/m²BOPP, PE, PP, PP Woven FabricBag With Valve
Valve Bags
Heavy Duty PP Woven Fabric Waterproof Agricultural Chemical Packaging Bag Valve 25KG Plastics
70g/m²-150g/m²BOPP, PE, PP, PP Woven FabricBag With Valve
Valve Bags
Custom-made Two Layer PP Woven Moisture Proof Waterproof Valve Bags for 25kg Agriculture Fertilizer Flour Feed Powder Resin
70g/m²-150g/m²BOPP, PE, PP, PP Woven FabricBag With Valve
Valve Bags
Food Grade Bottom Gusset PP Agricultural Chemical Resealable Packaging Bag with Valve 25KG Capacity
70g/m²-150g/m²BOPP, PE, PP, PP Woven FabricBag With Valve
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Try fewer filters — or tell us your spec and we’ll make it.
Request a custom bagValve Bags: specification guide
Valve Bags from Yantai Evergreen Packaging Co., Ltd. are used for cement, tile adhesive, mortar, putty, gypsum, flour, starch and chemical powders. Use the table to frame your requirement, then send it with your inquiry — we confirm construction, price and lead time in one reply.
| Fill weight | Typically 20, 25, 40 and 50 kg; other sizes to order. |
|---|---|
| Valve type | Internal valve, external (extended) valve or heat-sealable valve sleeve. |
| Fabric | PP woven 70–150 g/m², PE-coated or BOPP-laminated for moisture resistance; two-layer and kraft-paper options. |
| Closure | Self-closing valve, ultrasonic or heat seal, adhesive bottom. |
Also searched as: cement bags, cement sacks, concrete bags, mortar bags, valve sacks, block bottom valve bags, paper valve bags and PP woven valve bags for powders.
Buying guides for valve bags
- Valve Bag Filling Machines: Impeller, Air and Auger Packers Compared
- Valve Bags vs Open-Mouth Bags for Cement, Mortar and Powders
- Cement Bag Types: Paper, PP Woven and Block-Bottom Valve Sacks
- How Much Does a Bag of Concrete Weigh? Sizes, Pallets and Water
- How Many Bags of Concrete Do I Need? Formulas, Tables and Examples
Valve Bags FAQ
What is the difference between an inner and outer valve?
An inner valve tucks inside the bag and is closed by product pressure: simple and economical. An outer (extended) valve protrudes slightly so it can be folded or heat-sealed after filling, giving better dust control for fine powders such as cement, gypsum or titanium dioxide.
Are your valve bags suitable for automatic packing machines?
Yes. Block-bottom valve bags are designed for rotary and inline valve packers. Send us your packer model and spout diameter and we will match the valve width and bag dimensions.
Can valve bags be printed?
Yes. Gravure print on BOPP lamination for photographic graphics, or screen and offset print on coated fabric for simpler designs.
What bag is used for cement?
Most cement is packed in self-closing valve bags — either multiwall paper or laminated PP woven — filled on rotary or inline valve packers. See our cement bag guide.
How much does a bag of cement weigh?
Portland cement is sold in 94 lb sacks in the US and 25, 40 or 50 kg bags elsewhere; premixed concrete commonly comes in 40, 50, 60, 80 and 90 lb bags.
Request a quoteTell us what you pack.
Tell us what you pack.
We’ll engineer the bag.
Share your product, fill weight and destination. A packaging engineer replies with a construction, price and lead time — usually within 8 hours.