"Constanta-2" Ltd

Our innovations:

1. Bellows.

Made upon a waste-free technology excluding corrugation boring our bellows are distinguished by high tightness and wear resistance under high pressure.

Materials: elastomers, fluoroplastics.

2. Fluoroplastic encapsulated O-Rings for severe applications.

Fluoroplastic encapsulated O-ring comprises a rubber core seamlessly encapsulated in a fluoroplastic jacket with wall thickness of 0,3 up to 0,5 mm depending on ring dimension and services.


Features:	Compared with conventional rubber rings they excel in elasticity and antiadhesion properties, high chemical resistance and temperature capacity, low coefficient of friction on metal.
Service temperature range:	от -60 до +205°С
Coefficient of friction on metal:	0,1 - 0,2
Water absorption:	for 24 h. - ≤ 0,01 %
Service media:	concentrated acid and alkali solutions, hydrocarbons, solvents, aggressive gases and compounds.
Dimensions	Inner diameter D, mm	10 - 700
	Cross section d, mm	1,9; 2,5; 3,6; 4,0; 5,0; 5,8
	Wall thickness, mm	0,3 - 0,5
Core material:	fluoroelastomer (viton), silicone elastomer.
Application:	1. For static and dynamic services in chemical and petrochemical industries. 2. In alimentary industry and medicine when the usage of rubber rings is impossible.

See the example of encapsulated rings used in toroidal seal 130 UTDS (SPC "ANOD")

We also fabricate:

1. O-Rings

O-rings made in accordance with GOST-9833, OST and non-standard o-rings made from rubber-based compounds applicable in various service media and temperature conditions.

Diameter: up to 800 mm

Material: elastomers, fluoroplastics

2. Compressor rings for lubrication-free compressors

For compressors produced by Sumy Frunze NPO, JSC "Kompressorny Zavod" (Krasnodar), JSC "Borets".

Diameter: up to 1 000 mm.

Material: fluoroplastic 4-20, fluoroplastic 4-15-5, flubon, grafelon, caprolon V

3. Bushes for disk valve saddles

Nominal diameter: 20 - 250 mm

Material: elastomers, fluoroplastics

4. Ship shock absorbers АКСС-М

Dimensions in conformity with GOST 17053.1-80

Abbreviation	А, mm	В, mm	В1, mm
АКСС - 60М	100	56	80
АКСС - 12М	140	80	112
АКСС - 400М	175	96	140

5. Membranes and diaphragms

Materials: reinforced elastomers, fluoroplastics

6. V-rings

Dimensions in conformity with GOST 22704-77

Diameter: 8 - 800 mm

Service temperature: up to 250 °С, р ≤ 63 MPa

Material: elastomers, fluoroplastics

7. Seats and bushes for ball valves

D, mm: 15 up to 800

H, mm: 1 up to 100

Service temperature: up to 250 °С, р ≤ 70 MPa

Material: fluoroplastic 4, fluoroplastic 4К15М5, fluoroplastic 4К20, flubon, polyuretane, superhigh-molecular polyethylene , fluoroplastic 40С15М5 (tefzel), polycapromide, constaftor, polyetheretherketone (PEEK)

8. Jet pumps (injectors)

Abbreviation	Service media	Injection coefficient	Pressure fluid delivery, t/h	Injecting fluid delivery, t/h
ГВК - 2,0	water-acid	0,036	30,2	1,08
ГВК - 2,6		0,030	51,1	4,53
ГВК - 3,0		0,032	78,5	2,55
ГВЩ - 2,0	water-alkali	0,020	11,7	0,234
ГВЩ - 2,6		0,018	23,6	0,432
ГВЩ - 3,0		0,018	24,0	0,432
ГВЩ - 3,4		0,027	45,0	4,23
ГВС - 2,0	water-salt	0,53	8,17	4,39
ГВС - 2,6		0,53	13,78	7,42
ГВС - 3,0		0,53	18,47	9,93
ГВС - 3,4		0,53	23,65	12,75