1. Main purpose: 
rings and bushes of high-wear resistant silicon carbide-base material are designed for packing shafts and plain bearings in pumps used for pumping oil, oil products, liquid hydrocarbon gases, organic solvents, neutral liquids and acids (excepting fluoric one) as well as hydrochloric solutions in the temperature from rings and bushes of high-wear resistant silicon carbide-base material are designed for packing shafts and plain bearings in pumps used for pumping oil, oil products, liquid hydrocarbon gases, organic solvents, neutral liquids and acids (excepting fluoric one) as well as hydrochloric solutions in the temperature from -1000 to +5000C. 

2. Main sizes: 
the articles are made according to the customer's drourings, diameter ranges from 10 mm to 300 mm, thickness from 2 mm to 5 mm  with diamond machining of all surfaces, shaped cuts, pockets and shoulders. 

	Correspond to the article D d H ОНП50-2 90 62 72 ОНП60-2 100 72 82 ОНП70-2 110 82 92 ОНП80-2 120 92 102 ОНП90-2 130 102 112
	Correspond to the article D d D1 d1 H ОНП50-3 90 62 83 73 72 ОНП60-3 100 72 93 83 82 ОНП70-3 110 82 102 94 92 ОНП80-3 120 92 112 104 102 ОНП90-3 130 102 122 114 112

The materials contains no toxic substances, it is chemically neutral and safe in use. The products are fit for use in type of friction pairs having a lubrication or selflubrication. The guaranteed shelf life of rings and bushes is 5 years. 
High wear resistant and hardness of the material, exactness of sizes guarantee working life of products no less than 10 000 hours.