Chevron seals, rings, wipers
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Diaphragms, bellows, housing
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Dampers, couplings
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Elastomer products


We kindly ask you to fill in our Questionnaire if you are interested in our products and would like to place an order for production. This will help to provide all the necessary information and save the time.

Elastomeric seals are subdivided by design into gaskets, rings, collars, rings and collars with springs, gates, valves, wipers and various combined seals including several seals. The mechanism of sealing of these seals is primarily connected with highly elastic properties of rubber - the material of the seal, which provides a tight contact between the surfaces at low contact pressure. The use of these seals makes it possible to seal relatively roughly machined surfaces with low forces on the joint parts. The unique properties of rubber make it possible to create highly hermetic, simple, cheapest and most versatile seals compatible with most working and ambient environments. The simplicity of design results from the possibility of combining in one part (seal) all functional elements of the structural scheme of a contact seal.

The first products of our company were RTP, rubber seals, both standardised and manufactured according to customer’s samples and designs including rings, gaskets, reinforced diaphragms, couplings, etc. Nowadays the share of manufactured RTP in the total volume of Constanta-2 LLC production is very high, new standard sizes and types of seals, including import-substituting products, are mastered every quarter; standard products, such as rings, chevron seals, glands, diaphragms and spools, including spare parts for units and equipment manufactured in the USSR, remain relevant. In recent years, the number of large-size products produced has increased. Seals with diameters from 500 mm to 1700 mm are in demand by Russian manufacturers of equipment for power engineering and oil and gas production.

Elastomer products are manufactured in the rubber products shop, which is a separate production unit. This unit has several production areas that ensure preparation of rubber compound ingredients, mixing, rolling of the compound, moulding of blanks and vulcanisation of finished products. RTI production is fully supplied with equipment from shredders and mixers to presses, which allows us to implement most of the technologies of working with elastomers, including injection moulding, that significantly reduces the cost of high-volume production. We manufacture elastomer products for our customers on the basis of any raw materials from general purpose rubbers to highly resistant fluorocarbon, fluorosilicone, chlorobutyl rubber, polyurethanes and other special purpose materials. Moreover, our specialists are able to customise the selection of raw materials for our customers, taking into account the operating conditions. This allows us to optimise the operation of assemblies that use components manufactured by Constanta-2 LLC.

Elastomers used in production
Materail Shore A hardness Operating temperature, °С Resistance to media
Polyurethane (PUR) 70÷90 -30÷+110 Good water resistance up to 40°C, high wear resistance, resistant in hydraulic fluids and mineral oils
Nitrille-rubber elastomer (NBR) 70÷90 -30÷+120 Resistant in oil products, water, weak acid and alkali solutions
Fluoroelastomer SKF (FPM, Viton) 75÷95 -35÷+190 Resistant in petroleum products, hydraulic fluids, water, acids and alkaline solutions, H2S
Ethylene propylene elastomer SKEPT (EPDM) 70÷80 -50÷+150 Excellent resistance to hot water and steam, acids and alkalis, weather resistance, resistant to hydraulic and brake fluids
Hydrogenated Nitrile Rubber (HNBR) 70÷90 -40÷+160 High wear resistance, resistant to oil products, water vapour. Resistant in acid and alkali solutions.
Fluorosilicone rubber (FMVQ) 60÷70 -65÷+175 Resistant in petroleum products, solvents, hydraulic fluids, water vapour, acid and alkali solutions, H2S
Silicone rubber (MVQ) 60÷70 -60÷+220 Resistant in gases, atmosphere at elevated temperatures. Not resistant in acid and alkali solutions, solvents, water vapour.
Thermoelastoplast (TPE, TPES, PUR) 60÷90 -60÷+150 Resistant in oil products, water, acid solutions, alkalis, hydraulic fluids, mineral oils

We can offer our customers the following products:
  • with diameter from 5 mm to 1700 mm;
  • reinforced with fabric, polymer or metal cord, metal tabs;
  • of various configurations: from rectangular and circular rings to covers and extended stroke diaphragms, from solid rollers and tyres to glands and seats for shut-off valves;
  • almost any raw material, from rubbers certified for contact with foodstuffs to highly aggressive rubbers and wear-resistant polyurethanes;
  • produced by mould vulcanisation or injection moulding technology;
  • manufactured in accordance with the valid RD (TS, GOST or OST), according to the requirements of the technical specification, drawing or according to the sample provided by the customer.
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