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Tuftex® MH1, MH2, MH3

This material handling hose is designed for gravity or positive and negative pressure applications in bulk material handling. Thermoid® manufactures three types of this product (MH1, MH2 and MH3), allowing the customer to select the type that best fits the application, but all three are constructed with excellent abrasion-resistant materials.

MH1 (Light Duty)

Inside Diameter (inches) 3 4 5 6 7 8 9 10 11 12
Weight (lbs./ft.) 1.5 2.0 2.2 2.25 3.0 3.5 4.0 4.5 5.0 6.0
Inside Bend Radius (inches) 5 6 7 8 10 11 12 13 14 15
Length Required for 180° Bend (inches) 26 28 30 37 44 50 57 63 69 75
Minimum Burst Pressure (psig) 100 85 66 47 44 41 33 29 24 22
Internal Working Pressure (psig) 33 28 22 16 14 13 11 10 8 7
Crush Resistance (lbs./ft.) 1300 1500 1000 780 680 605 590 615 750 700
Negative Vacuum to Collapse (inches of hg.) 27 27 24 20 15 12 10 7 6 6
Operating Temperature Range -40°F to +280°F

MH1 (Light Duty)

Inside Diameter (inches) 3 4 5 6 7 8 9 10 11 12
Weight (lbs./ft.) 1.5 2.5 3.0 3.5 4.0 4.5 5.5 6.0 6.5 7.0
Inside Bend Radius (inches) 5 7 9 11 12.5 13 15 16 17 18
Length Required for 180° Bend (inches) 33 40 50 59 66 72 78 84 91 97
Minimum Burst Pressure (psig) 110 90 75 65 55 45 43 40 37 35
Internal Working Pressure (psig) 36 30 25 22 18 15 14 13 12 11
Crush Resistance (lbs./ft.) 1300 1550 1100 860 715 790 875 770 750 700
Negative Vacuum to Collapse (inches of hg.) 27 27 25 22 18 14 13 13 12 12
Operating Temperature Range -40°F to +280°F

MH1 (Light Duty)

Inside Diameter (inches) 3 4 5 6 7 8 9 10 11 12
Weight (lbs./ft.) 2 3 3.5 4.25 5 6.25 7.5 8.5 10.5 12.5
Inside Bend Radius (inches) 8 11 13 14 15 16 17 18 19 20
Length Required for 180° Bend (inches) 38 48 55 61 67 73 80 88 92 99
Minimum Burst Pressure (psig) 185 175 156 138 119 100 83 70 52 40
Internal Working Pressure (psig) 61 58 51 45 39 33 27 25 17 13
Crush Resistance (lbs./ft.) 1600 1550 1100 1050 1000 900 875 770 780 700
Negative Vacuum to Collapse (inches of hg.) 27 27 27 24 21 20 19 18 17 15
Operating Temperature Range -40°F to +280°F
* Tuflex Type MH1, MH2 and MH3 are normally available in 20 foot lengths, however these products can be ordered in a range of diameter sizes and lengths.

Literature

Thermoid Industrial Ducting – Brochure

Features & Benefits

MH Type 1
  • Spring steel wire helix support
  • Single-ply synthetic fabric reinforcement
  • Abrasive-resistant rubber tube .062 inch thick
  • Abrasive-resistant rubber cover
MH Type 2
  • Spring steel wire helix support
  • Single-ply synthetic fabric reinforcement
  • Abrasive-resistant rubber tube .125 inch thick
  • Thick abrasive-resistant rubber cover
MH Type 3
  • Spring steel wire helix support
  • Double-ply synthetic fabric reinforcement
  • Abrasive-resistant rubber tube .250 inch thick
  • Thick abrasive resistant rubber cover

Coatings & Finishes

COATINGS
The coatings offered by Thermoid can reduce the loss of air and gases through the duct wall, increase abrasion and chemical resistance, reduce ducting flexibility, as well as the inside diameter of the duct, and increase the weight and wall thickness of the duct.
Available Coatings
  • Neoprene (CR) (Black) – Neoprene is the most commonly used industrial duct coating. It resists ozone, sunlight oxidation, heat and flame. Neoprene performs well in contact with oils, water and some chemicals. It has good tensile strength and resilience.
Maximum Recommended Coatings
  • Neoprene – 4 Coats (For coating, specify duct type and number of dip coats).
END FINISHES
The following end finishes are integrally manufactured into the ducting.
Soft End
ducting-soft-end
  • That portion of the duct where the wire reinforcement is omitted, having the same number of plies as duct body, plus one additional ply of fabric over soft area. This type of end provides a smooth clamping area.
Reduced End (Special)
ducting-reduced-end
  • The hose end has an ID that is smaller than the duct body. A rubber insert usually forms this end.
Plain End
ducting-plain-end
  • Hose with a plain end is simply cut at a given point, the end being the same as the duct body. The wire at the cut end is crimped back to prevent snagging. All standard items are furnished with plain ends.
Belled End (Special)
ducting-belled-end
  • A belled end has a soft end with an ID larger than the duct body.

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