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Torr Technologies,Inc

1435 22nd St NW,   Auburn WA 98001
PH:(253) 735-9115  FX:(253) 735-0437
Tollfree:(800) 845-4424
Reusable Vacuum Bagging Systems, Hardware, Hoses & Pumps
Thumb1 Probe Asst Thumb3 Hose-Asst Cart Probe Install Rotary Vane Hinge Closeup
Vacuum Bagging Systems
EVTs with Plates
Tools to Fit Customer's Molds
Double Diaphragm Tools
Table Systems
Envelope Bags
Stacking Tools
Heated Tables
Molded & Extruded Shapes
Vacuum Connectors
Vacuum Hose
Vacuum Pumps
Vacuum Gauges & Regulators
Silicone Rubber Sheeting
Silicone Rubber Extrusion
★ Trade Shows
About Us
Surplus Materials

Envelope Bags

Envelope bags are used to process a variety of small to mid-sized parts in autoclaves, ovens, and at room temperature. They're ideal for laminates or assemblies that require even pressure from all sides. Envelope bags can be configured with one, two, or 3 sides that open, and are available with vacuum ports and thermocouple pass-throughs.

One-sided Envelope Bag

A typical envelope bag that opens on one side. On the right is our VP36 1/4" male npt vacuum port with a QD11 quick-disconnect installed. On the left is a type J thermocouple pass-through that accepts a standard tc plug on the inside and outside of the diaphragm.

Translucent Envelope Bag

Torr can also provide our elastomeric vacuum tools, including envelope bags, with translucent, high-strength silicone diaphragms.

Three-sided Envelope Bag

This 3-side opening envelope bag includes (2) vacuum ports and (3) type J thermocouple pass-throughs. Type K is also available.

Envelope Bag with Interflow

Although not visible in this image, the lower diaphragm of this 3-side opening bag is made of our Interflow™ breather-pattern high-strength silicone. It conforms to the underside of the mold and provides a means of removing gases. The increased thickness of the Interflow makes the envelope bag less likely to be punctured during transport.