10/19
GrainPro®
GrainSafe™ Bag
-1.0/G-HF Instruction Manual
MA4020JVD1025-3
5.4.
PRESSURE DECAY TEST (PDT)
5.4.1.
After completely zipping and closing,
perform a Pressure {Vacuum} Decay Test
(PDT) to ensure gas-tightness:
a.
Use digital manometer.
5.4.2.
Either, a commercially available or
improvised U-tube manometer can be
used to monitor the pressure.
5.4.3.
Connect the manometer hose into the
flexible inlet of the GS Bag 1.0/GHF.
5.4.4.
Use a vacuum pump [at least 2.3 cubic
meters per minute with 600 Watts
(0.80horsepower) centrifugal pump]:
a.
Connect the vacuum pump hose to the
inlet port of the GS Bag 1.0/GHF.
b.
Create at least -250 Pascals (Pa) or -25
millimeters’ water (mm H
2
O) vacuum.
Doing this can also help engage the zipper
tracks properly as there may be
imperfections during zipping.
c.
For it to be considered sufficiently airtight, the final pressure should not be greater
than one-half (½) of the initial pressure (created by the vacuum pump) within five (5)
minutes.
d.
If the PDT test failed, check for holes/tears and poorly sealed zippers then repeat the
PDT procedures.
5.5.
PLATFORM INSTALLATION OF RODENT GUARD (RG)
5.5.1.
For protection against rodent attacks (one
set contains 4 pieces):
a.
One set can be installed on any
platform legs with leg perimeter
(round or square) of 22 cm (9'') to 44
cm (17'').