On the 13th, the Shandong Provincial Bureau of Quality and Technical Supervision announced the results of the second batch of supervision and spot checks on the quality of rubber seal products in 2015 on its official website. Four batches of products from four companies did not meet the requirements of relevant standards.
In the second quarter of 2015, Shandong Provincial Bureau of Quality and Technical Supervision organized and conducted a provincial supervision and inspection of the quality of rubber sealing products. This time, a total of 30 batches of rubber sealing products produced by 30 enterprises in the province were sampled. According to HG/T2579-2008 "O-shaped rubber sealing ring material for common hydraulic system", GB/T3452.1-2005 "O-shaped rubber sealing ring for hydraulic and pneumatic parts Part 1: Dimensional series and tolerance", GB/T3452.2 -2007 "O-shaped rubber sealing ring for hydraulic and pneumatic parts - Part 2: Appearance quality inspection specification", HG/T2811-1996 (2009) "Rotary shaft lip seal rubber material", GB/T15326-1994 "Rotary shaft lip shape" "The appearance quality of the seal ring", GB/T13871.1-2007 "The sealing element is the rotary shaft lip seal of the elastomer material Part 1: Basic dimensions and tolerances" and other standard requirements, for the ordinary hydraulic system with O-shaped rubber seal 9 products of ring product and rotary shaft lip seal product hardness (Shore A), tensile strength, elongation at break, compression set, hot air aging, liquid resistance test, brittle temperature, appearance quality, size Tested.
The spot check found that 4 batches of 4 products of Longkou Bit Vacuum Technology Co., Ltd., Yankuang Group Zoucheng Jintong Rubber Co., Ltd., Feicheng Tailong Rubber Products Co., Ltd. and Taian Huaxin Rubber & Plastic Products Factory did not meet the relevant standards. Requirements, unqualified items involve tensile strength, compression set, liquid resistance test and hot air aging.
Dema Type Electric Chain Hoist
Structural features of electric chain hoist: electric hoist product structure: the body is made of high-strength tensile shell or die-cast aluminum shell, which is precisely manufactured by thin-wall extrusion molding process, small in size, light in weight and high in strength. The standard electric chain hoist has an independent gearbox system, the two-stage coaxial transmission gear mechanism in the sealed gearbox, and a long-life oil bath lubrication system. The powder metallurgy clutch of the electric hoist is used as an overload protection device, and the brake adopts a disc type DC electromagnetic field brake, which has a large braking torque, is stable, rapid, and has low noise.
China Dema Type Electric Chain Hoist
reliable performance
With various specifications and models, the lifting capacity is up to 2000 kg
Standard 4-m hook travel
Equipped with working timer and diagnostic interface
Easy to use and operate
Direct and effective stock delivery
Plug connection for simple and fast commissioning
Ergonomic handling
service friendly
High security and reliability
High-quality powder-coated surface for better protection and longer life
24 volt contactor control
The friction clutch can automatically cut off the lifting operation by monitoring the speed
The chain hoist and the trolley housing meet the IP 55 degree of protection
Wide range of uses
Double speed hoist
Equipped with electric travel interface
Optional operating limit switches up to 1000 kg
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