technical NOTES

Glass Bags with PTFE Membrane for Kiln Raw Mill Application

S.N. Head UOM Requirement for Pulse Jet Requirement for Reverse Air

B PTFE

1 PTFE Membrane Origin Country / Company

GORE /

DONALDSON / BHA

/ (TTG) / AFT

GORE /

DONALDSON /

BHA / (TTG) /

AFT

2 Weight of PTFE Membrane Gm/M2 min 5% of fabric weight min 5% of fabric weight

3 Membrane Ball Burst Strength lbf 3 to 5 3 to 5

4 Grade of PTFE NA Electrical Grade Electrical Grade

5 Continue Service Temp Deg. C 260 Minimum 260 Minimum

6

Max Surge Temp for

30 min (Without life

reduction)

Deg. C Supplier to confirm Supplier to confirm

7

Membrane Filtration

Efficiency for 0.4

micron size particles

% > 99.5 % > 99.5 %

8

Air Permeability of

PTFE Laminated

woven glass filter

bag

CFM/ft2 @ 0.5"

WG Max 4 to 8 Max 4 to 8

Ltr/dm2/min @

200 Pa Max 20 to 40 Max 20 to 40

cm3/cm2/sec @

125 Pa Max 2 .0 to 4.0 Max 2 .0 to 4.0

C Stitching

1 Stitching at Country / Company Europe / USA Europe / USA

2

Stitching of bags

with micro porous

monofilament PTFE

threads

Yes / No 100 % by PTFE Thread 100 % by PTFE Thread

3

Stitching of Sub

assembly with

micro porous

monofilament PTFE

threads

Yes / No 100 % by PTFE Thread 100 % by PTFE Thread

4 Stitching Thread Quality NA Rastex / Equivalent EquivalentRastex /

5 Vertical Stitch Lines No of rows 3 3