And Tian is a hydrous calcium magnesium silicate having a chain structure. It is a collection of microfibrous or dense massive minerals mainly composed of tremolite and actinolite , and containing other trace minerals. The chemical composition is Ca 2 (Mg, Fe 2+ ) 5 (Si 4 O 11 ) 2 (OH) 2 . Is a monoclinic system. The crystal is fibrous or needle-shaped. The colors are various, and are white, cyan, yellow, green, black, red, and the like. It is generally lustrous and sometimes waxy. Translucent to opaque. The refractive index is 1.606-1.632, and the birefringence is 0.021-0.023. No fluorescence or phosphorescence. Hardness 6-6.5, density 2.9-3.1g/cm3. The fracture is jagged. Extremely tough, fine texture, tough, polished surface is very bright. Nephrite is mainly produced in the green schist facies which are in contact with metamorphic metamorphic belts and shallow metamorphic belts, and sometimes may be altered or metamorphosed by basic magmatic rocks. China is the oldest and most famous country in the world for the production of jade . The main producing areas are the Hetian Yulong Kashi River in the south of Xinjiang, the Karakash River and the Kunlun Mountains in the upper reaches of the Yarkant River. Other countries producing nephrite include Australia, Canada, the United States, Russia, New Zealand, and Brazil.
Maximum
Load:60-10,000kg
The state of
the art VR type electric chain hoist is an indispensable item used in the
light-duty lifting industries across the world, where the characteristic of
reliability is designed into the hoist structure, safety features incorporated
into the operating system, and advanced crafting techniques introduced into the
modern design.
Made for less
volume, lighter weight, and more operating safety and convenience, the chain
hoist has the ability to adapt to various working environment, all available at
a competitive price. Different models offer choices of lifting capacities ranging
between 60kg and 7500kg to suit everyday light-duty lifting work. When used in
combination with manually operated trolley, hand-pushed trolley, or
motor-driven trolley, the hoist can be mounted on the mono-rail traveling
Crane, Jib Crane, and Gantry Crane. This provides a maximum solution to solve
your material handling applications.
VR electric
chain hoist aims to provide customers with highest level of safety and
reliability. Following is a list of standard configurations of the product.
New lifting eye nut with intermediate
teeth for perfect chain drive
Torque limiter
Disk brake for lifting motion
Standard lifting height:3m
Double-speed lifting
Electrical safety devices for upper
and lower lifting position limit
IP55 rated lifting and traveling motor
Tropic-proof
protection (lifting and steering-90 to 95 %)
Galvanized lifting chain
Emergency punch-stop button
Power supply
source:400V/3Ph/50Hz,415V/3Ph/50 Hz,460V/3 Ph/60Hz
Low voltage 48 V command
Speed variation on traveling
Comply with CE directives
The electric
chain hoist is available with various operational components to suit various
applications.
Secondary brake for the lifting motor
Limit switch for traveling
Short headroom trolley
Trolley running on curved track
Dual-speed traveling trolley carriage(20
& 5 m/min)
Slow speed traveling trolley(3 to 10
m/min)
High speed traveling trolley
Additional button on pendant unit
Rain protection
Explosion proof hoist
Reinforced tropic-proof protection
Chain hoist available in a version
that complies with CSA standards
Manual brake release
For any
other special requirements, please contact us.
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Hetian jade's chemical knowledge
Hetian jade has at least 7,000 years of history in China, also known as nephrite, which is the main body of Chinese jade culture. Because of its delicate texture, Hetian jade has a beautiful and moisturizing effect, uniform color, soft and fat, and it has a special fineness, so its beauty is smooth and moist, the color is uniform, soft and fat, it has a a special kind of gloss, gloss between glass, oil sheen, between waxy luster, luster can be called jade, this beauty is very elegant; but also very tough and Tian, under pressure can be more than steel. If you add delicate carvings, you can really cultivate people's temperament and character.