1. Gas-Hermetic Fumigation Cocoon™
GrainPro® Cocoon™
Gas-Hermetic Fumigation Cocoon™
Doc. Code: TSD-PP006

2. INTRODUCTION COCOON : GAS-HERMETIC FUMIGATION Material Flexible PVC
Color
White
Thickness
0.83 mm
Weight
1,050 gsm
Fabrication
High frequency welding
Sealing
Zipper pulls
Useful life
10-15 years
OTR
500 (Max) cc/m2/day
WVTR
8 + 1 g/m2/day
Reusable/
Recyclable
Yes

3. DESCRIPTION
The GrainPro® Gas-Hermetic Cocoon (G-HF) is designed for toxic-free fumigation and the safe storage of high value and durable agricultural commodities where insect respiration is insufficient for up to 1 year or more;
G-HF Cocoon is either standard size or custom-made to enclose stacks of boxed, crated, or packaged produce;
G-HF Cocoon uses a specially-developed durable and flexible plastic liner that is resistant to rodents and has low permeability to oxygen, carbon dioxide and moisture; and
It is provided with inlet and outlet ports at the bottom and top respectively. These enable the module to be flushed from the bottom with carbon dioxide or nitrogen from the tank or cylinders and the air to be expelled from the top.

4. 1 2 3 PROCEDURES SITE SELECTION AND PREPARATION:
Choose a flat, elevated site for installation. For indoor installation, clean the area to remove sharp objects. 2
FOR OUTDOOR INSTALLATION:
Prepare a 5-cm layer of fine sand (or equivalent) as ground foundation. 3
LAY-OUTING OF THE BOTTOM SECTION:
Place one sack in every corner and stretch the bottom to prevent folds. Load the first layer of sacks in one direction.

5. 4 5 6 REQUIRED STACK HEIGHT:
Keep the sacks stable by loading the succeeding layers in a crisscross manner. Continue piling until the desired Cocoon height is reached. 5
BAGGED LOADING (MECHANICAL):
Stacking of grains involves diverse operations such as conveyor, forklift. 6
TOP LAYER (OUTDOOR):
Put an extra layer of bags to serve as a slope or peak of the stack.

6. 7
PREPARING TO ZIP:
Engaging the zipper pull using left and right keys. Continue zipping until starting flap is reached again. 8
COMPLETING THE ZIPPER PROCESS:
In case of mal-alignment, pull the upper and lower sections of the liner walls in opposite directions. 9
ENGAGING THE TENSION STRAPS:
The tension straps positioned along the wall of the upper section must be inserted through their respective buckles.

7. 10 11 12 RAISING THE COCOON WITH TENSION STRAPS:
The required tension can be achieved by attaching the cords to the buckles. 11
SETTING-UP THE GRAINSHADE:
For outdoor installation, install poles and position the GrainShade™ at least 1m above the Gas-Hermetic Fumigation Cocoon. 12
PRESSURE DECAY TESTING:
A commercially available or improvised U-tube manometer can be used to monitor the pressure to ensure gastightness.

8. 13 14 15 FLUSHING: CO2 CO2 CYLINDERS:
Available with or without siphon (dip tube). For rapid flushing, the cylinder without siphon should be inverted. 14
MAKESHIFT INVERTER:
Can be made using sand bags or other improvised technique. With siphon, should be in upright position during flushing. 15
CYLINDER REPLACEMENT:
Disconnect the pressure kit, inspect the inlet port for any dry ice formation and wait for at least five minutes then continue the purging.

9. DOSAGES: CO2

10. CONVERSION TABLE: O2-CO2

11. 16 17 18 OXYGEN MONITORING: Using oxygen analyzer.
REPAIRING PUNCTURES AND OTHER DAMAGES:
Punctures, cuts, and holes should be patched immediately. 18
CLEANING THE BOTTOM AND TOP SECTIONS:
Maybe cleaned with soap and water, when dry, folded, rolled up and place them in the carrying bag.

12. Visit Us
THANK YOU