Invar two-horned steel figure eight

Invar double-horned steel figure eight

The lowering device "Increased double-horned steel figure eight" allows you to work on a double rope. Alternatively etching one of them - descend with a zigzag pendulum. To fix the descent device on the rope, the lower end of the rope must be wrapped around the horns. The enlarged working ring allows you to pass any rope knot through the descent device. This quality can be useful when building ropes (for example, during rescue work in mountaineering or work on high objects in pro-alpinism). The principle of operation of the descent device "Eight" is based on the use of the friction force that is created when the working rope moves around the body of the descent device during execution. The one who descends controls (and regulates) the speed of descent by braking the lower end of the rope with the supporting hand on one side, and by increasing or decreasing the angle of the descent device with the lower end of the rope.

The classic use of the device is when the working rope is wrapped around the neck of the figure eight. The option of loading with the rope wrapping around the carabiner bracket dramatically reduces the friction force.

WARNING! During the descent, releasing the lower end of the rope with your hand or leaving it unfixed is PROHIBITED!

Made by milling from a steel sheet 10 mm thick. Strength and performance characteristics meet the requirements of the standard DSTU EN 341:2006 "Personal protective equipment against falls from a height. Descending devices".

вЂў Maximum permissible load: 25 kN

вЂў Size: 155x155x10 mm

вЂў Weight: 439 g

External look	Artikul	Name	Unit	Price	Pack pcs.
	№37-25	Invar two-horned steel figure eight	m	650.00 uah


high strength

- equipment for pro-alpinism

- for single or double rope descent

Features	Polyamide (kapron)	Polypropylene	Polyester (Lavsan)	Cotton
Density	1.14 g/cm³	0.91 g/cm³	1.38 g/cm³	1.50 g/cm³
Softening temperature	170 °C	140 °C	225 °C
Melting temperature	215 °С	165 °С	260 °С
Elongation at break	up to 50%	up to 30%	up to 30%	Up to 30%
Wet breaking load	loss up to 15% (breaking load is restored upon drying)	does not lose	does not lose	increase up to 15%
Resistance to sunlight	Insufficient	Insufficient (when adding light stabilizers and dyes, they are resistant to light and atmospheric conditions and almost do not lose strength for a long time)	Good	Average
Resistance to temperature from –40 to +60	Good	Insufficient	Good
Resistance to acids	Insufficient	Good	Good	Damaged
Resistance to alkalis	Good (damaged in hot alkalis)	Good	Fair (damaged in concentrated and hot alkalis)	Damaged
Resistance to microorganisms (rot, mold)	Good	Good	Good	Prone to rot
Insects	Not edible	Not edible	Not edible
Fire	Hardly flammable	Hardly flammable	Hardly flammable	Highly flammable (does not emit harmful substances when burned)
Flexibility	Good	Sufficient (decreases at negative temperatures)	Good	Good
Energy absorption capacity	High	Sufficient	Good
Resistance to shock loads (jerks)	Good	Sufficient	Sufficient
Electrostatic properties	Dielectric	Dielectric	Dielectric	Dielectric
Moisture absorption	4%	0%	0.4%	8.5%