DID YOU
KNOW ?

 

Fan doors made of HDPE = NO hydraulics!

Poly works on air pressure, unlike heavy steel fan doors that need hydraulics to open/close.

MINE VENTILATION DUCTING

Mine Ventilation Ducting - PolyDuct
mine ventilation ducting polyduct
OLYMPUS DIGITAL CAMERA
Mine Ventilation Ducting - PolyDuct Twin Bends
mine ventilation ducting polyduct
IMG_3764

PolyDuct Fittings

Polyline Industries have developed and manufactured an advanced range of moulded polyethylene products manufactured from linear Medium-Density Polyethylene (MDPE), a lighter material with better impact resistance than High-Density Polyethylene (HDPE).

STANDARD features of HDPE


  • Non-corrosive
  • Flexible
  • Inbuilt noise absorption
  • Durable & impact resistant
  • Lightweight (compared to steel)
  • Low maintenance
  • Low friction coefficient (0.02)

ADVANCED features of the moulded MDPE products


A more robust moulded cylinder which is:

  • Seamless  - products therefore have less welds
  • Inherently round  - Rather than fabricated & inherently flat
  • Double Rings - Ensures vent bags will not blow off that even under the highest pressure
  • UV Stable for outdoor storage
  • Fire Retardants & Anti-Static additives available
  • Compatible Joining System

View Polyline Industries Range:

Cylinder / Barrel

Polyduct cylinder barrel
Specifications

Stock
Code


Diameter 
(mm)


Length 
(mm)


Weight 
(kg)


Wall
Thickness *


F00110652000426mm +/- 1
F00212002300657mm +/- 1
F003140025001138mm +/- 1
* Wall thickness can be increased for products used for intake sections

T-Piece

Polyduct T piece
Specifications

Stock 
Code


Diameter
(mm)


Dimensions
(mm)


Weight
(kg)


F004

1065

2000 X 1500

55

F005

1200

2300 X 1750

85

F006

1400

2500 X 1950

150

Y-Piece

Polyduct Y Piece
Specifications

Stock 
Code


Diameter 
(mm)


Dimensions 
(mm)


Weight 
(kg)


F00710651250 X 155055
F00812001420 X 177085
F00914001650 X 1900150

90° Bend - 5 Section

Polyduct cylinder barrel 90 degree bend 5 section
Specifications

Stock 
Code


Diameter
(mm)


Dimensions
(mm)


Weight
(kg)


F01010651600 x 160042
F01112001800 x 180065
F01214002100 x 2100113

90° Bend - 3 Section

Polyduct 90 degree bend 3 section
Specifications

Stock 
Code


Diameter
(mm)


Dimensions
(mm)


Weight
(kg)


F01310651600 x 160042
F01412001800 x 180065
F01514002100 x 2100113

60° Bend - 3 Section

Polyduct 60 degree bend 3 section
Specifications

Stock 
Code


Diameter
(mm)


Dimensions
(mm)


Weight
(kg)


F01610651400 x 133542
F01712001550 x 150065
F01814001820 x 113113

45° Bend - 3 Section

Polyduct 45 degree bend 3 section
Specifications

Stock 
Code


Diameter
(mm)


Dimensions
(mm)


Weight
(kg)


F0191065800 x 80025
F0201200900 x 90040
F02114001050 x 105045

45° Branch

Polyduct 45 degree branch
Specifications

Stock 
Code


Diameter
(mm)


Dimensions
(mm)


Weight
(kg)


F02210652000 x 205070
F02312002300 x 2230110
F02414002500 x 2570200

60° Branch

Polyduct 60 degree branch
Specifications

Stock 
Code


Diameter
(mm)


Dimensions
(mm)


Weight
(kg)


F02510652000 x 180060
F02612002300 x 203090
F02714002500 x 2340160

4 Way Section

Polyduct Fittings 4 way section
Specifications

Stock 
Code


Diameter
(mm)


Dimensions
(mm)


Weight
(kg)


F02810651600 x 160042
F02912001800 x 180065
F03014002100 x 2100113

Directional Valves

Polyduct directional valves
Specifications

Stock 
Code


Diameter
(mm)


Dimensions
(mm)


Weight
(kg)


F0311065+150 to width+ 15
F0321200+150 to width+ 20
F0331400+150 to width+ 25

On request, a steel sleeved valve(s) can be added
to products to control the directional flow of air.

Flanged End

Polyduct flanged end
Specifications

Stock 
Code


Diameter
(mm)


Dimensions
(mm)


Weight
(kg)


F0341065+150 to width+ 5
F0351200+150 to width+ 6
F0361400+150 to width+ 7

Oblique Section

Polyduct Fittings oblique section
Specifications

A ‘slim-line’ range of Polyduct that allows maximum air flow through drives with limited headroom.

Vent Bag Joiner

Polyduct vent bag joiner
Specifications

Vent Bag Joiners can be manufactured to any length.

Flange Adaptor

Polyduct flange adaptor
Specifications

Flange Adaptors can be manufactured to any length.

Hanging Fins

Polyduct hanging fins
Specifications

Hanging Fins are placed to ensure products are multi-directional.

Storage

Polyduct Fittings storage
Specifications

Store all sections on ends to maintain shape when not in use.

This product is UV stable for outdoor storage where necessary.

Joining System

Polyduct Fittings joining system

Custom Reducers / Adaptors 

Polyduct Fittings one off reducers

Ratchet Tie Down Straps

Polyduct Fittings ratchet tie down straps
Specifications

Polyline have developed a unique sealed rubber joining system which is cost effective and very easy to use. It also allows the flexibility to create minor bends.

Stock
Code

Diameter
(mm)

F040

1065

F041

1200

F042

1400

Specifications

Polyline Industries have the capability to produce One-Offs, Reducers and Adaptors to suit any requirement.

Specifications

Polyline supply Ratchet Tie Down Straps to enable vent bags to be joined to the double ring end of the PolyDuct Fitting.

Stock Code

Dimensions

F043

50mm x 7.5m

F044

25mm x 4.5m

Fan Silencers & Accessories

Polyduct Ventilation Fan Silencer
Polyduct Ventilation Fan Silencer close up

 

FEATURES of Polyline Fan Silencers


  • Provides ready inbuilt noise absorption

 

  • By using high tech sound foam and sound barrier, we are able to maintain an overall width of < 50mm, compared to conventional Rock Wall type (overall > 120mm). This means that the silencer O.D. does not exceed the fan flange.

 

  • Silencers can be bolted end to end when mounting a fan in a restricted area such as a vent access wall

 

  • Available in high visibility yellow
Further Construction Details
  • High-Density Polyethylene (HDPE) Sheeting is used for the inner and outer casings with the inner cylinder strategically punched out to assist the performance of the noise barrier.
  • The casing end flanges are constructed from 20mm HDPE and formed to fit any fan on request, then bolted together sandwiching the existing steel flange on the fan.
  • Silencers are bolted through the existing P.C.D's on the steel flange to the flange on the end of the silencer for added support.
  • The length of all silencers are generally built to 1.5 x the diameter of the fan to maximise the level of noise reduction. However, shorter versions are available for constricted areas.

Available with detachable polyethylene bell or bag cone ends.

 

ADVANTAGES of Polyline's Fan Silencers


  • Non-Corrosive - Excellent in damp and salty environments, a superior to steel silencers

 

  • Maintenance Free - By using 'Closed Cell' foam and protective coating, we are able to produce a silencer which is impervious to moisture and dust, resulting in no maintenance.

 

  • Durable & Impact Resistant - This product can take severe impact and return to its original shape

 

  • Extremely Lightweight - Enables installation & removal an easier task to perform, especially in difficult locations

 

  • Size Efficient - The overall diameter of the fan assembly is not increased by the silencer, preventing catch points in environments such as Underground Mining

Fan Silencers

Polyduct Ventilation Fan Silencer
Specifications

Stock
Code

Silencer 
Type

Length

Weight

G001

VH713

1m

 -

G002

700-762

1m

-

G003

HF 804

1.2m

G004

GAL 9

1.6m

G005

ES 9

1.6m

G006

HF 1004

1.6m

G007

HF1200

1.6m

G008

ABB 1220

1.6m

G009

GAL 12.5

1.6m

100kg

G010

HF 1254

1.6m

100kg

G011

CC 1400

Short 1.6m

125kg

G012

HF 1400

Short 1.6m

125kg

G013

CC 1400

Long 2m

160kg

G014

HF 1400

Long 2m

160kg

G015

HF 1454

Short 1.6m

G016

HF 1454

Long 2m

Flanges

Polyduct Ventilation flange specs
Specifications

The following table details standard flange configurations that Polyline manufactures. Other configurations can be accommodated to suit your requirements.

Silencer 
Type

'A'
Case I.D.

'B'
Flange
O.D.

'C'
Bolt P.C.D.

'D'
Hole
Dia

'E'
No
Holes

HF 804

804

890

841

14

16

GAL 9

904

1018

960

20

16

ES 9

997

1119

1060

22

16

HF 1004

1005

1093

1047

14

16

HF1200

1212

1360

1260

24

16

ABB 1220

1232

1385

1289

18

20

GAL 12.5

1258

1400

1330

24

16

HF 1254

1260

1370

1320

18

20

CC 1400

1412

1550

1490

24

16

HF 1400

1400

1542

1488

22

16

HF 1454

1458

1600

1530

18

20

Intake Cones

Polyduct Ventilation Intake Cones
Specifications

Intake Cones are manufactured in various diameters and transitions as required.

Stock
Code

Silencer
Type

G017

700-762

G018

HF 804

G019

GAL 9

G020

ES 9

G021

HF 1004

G022

AF 1200

G023

ABB 1220

G024

GAL 12.5

G025

HF 1254

G026

CC 1400

G027

HF 1400

G028

HF 1454

Vent Bag Adaptors

Polyduct Ventilation Bag adaptors
Specifications

Vent Bag Adaptors are manufactured in various diameters and transitions as required.

Stock
Code

Silencer
Type

Bag Adaptor
Size

G029

700-762

700-762

G030

HF 804

804-800

G031

GAL 9

900-915

G032

GAL 9

900-1067

G033

ES 9

900-915

G034

ES 9

900-1067

G035

HF 1004

1004-1000

G036

AF 1200

1200-1200

G037

ABB 1220

1200-1200

G038

GAL 12.5

1250-1200

G039

HF 1254

1254-1200

G040

CC 1400

1400-1400

G041

HF 1400

1400-1400

G042

HF 1454

1454-1400

 

Self-Regulating Fan Covers

Polyduct Ventilation Self regulating fan covers
Details

A simple configuration that bolts to the fan flange and automatically opens or closes with air flow from the fan.

Silencer Test Results

Vent Bag Protectors

Ventilation Bag Protectors are hard plastic sheeting that wrap around the outside of any vent bag to provide protection to the bag in areas where it may be prone to damage from external forces (e.g. damage from trucks).

The sheeting is available in 2mm thickness.

Vent Bag Protectors are available in standard widths which wrap around to protect approximately two-thirds the diameter of the vent bag.

They can be manufactured to any length (min 7 meters).

Polyduct Ventilation vent bag protectors
Polyduct Ventilation vent bag protectors

 

 

Did you like our innovative approach
to Mine Ventilation Ducting?

 

We can also bring your custom HDPE ideas to life!