Ball Valve flanged DUPLEX (DN 15-100 PN 1,6-4,0 MPa)


liquid and gaseous and aggressive media.

Flanged ball valve 900D series – “Duplex”, DN 15-100, PN 1.6 – 4.0 MPa, two-part design, flanged

The connection to the pipeline is flanged, at the request of the customer, they can be completed with matching flanges, gaskets and fasteners.

Features: die-welded, collapsible, single-pipe construction, low metal consumption, lower price category, the possibility of using instead of valves due to the shortened construction length. Double dimensional row of construction lengths according to GOST 28908-91 row 3 and row 1.

Recommended by the manufacturer for thermal power plants, utilities, chemical, oil refining and other industries.

Production: ЗАО «Арматурная Компания «ФОБОС», Россия
Cost: по запросу
Characteristic Value
Working medium liquid and gaseous media
Nominal bore, mm 1.6; 2.5; 4.0
Working medium temperature  
For stainless and low temperature carbon steel – 60°С…+160 °С
For carbon steel – 40°С…+160 °С
The tightness class of the gate according to GOST 9544-2015 А
Climatic version according to GOST 15150-69 U1 (-40°C…+40°C) or UHL1 (-60°C…+50°C)
Handle turning force, N 150 max
Spatial position of the crane random
Connection to the pipeline flanged according to GOST12815
Total service life, cycles 8000
The full service life 10
Management method manual

The Duplex ball valve consists of a housing 1 and a branch pipe 2, tightened together by studs 13 and nuts 14. In this case, the fluoroplastic seals 5 are pressed against the floating plug 3, and the ring 6 seals the joint of the housing with the nozzle. The counter-flying spindle 4 is sealed with a package of fluoroplastic rings 7 and 8, compressed by disc springs 11 through the sleeve 10 and tightened by a nut 12. A fluoro rubber circular ring is also installed in the groove of the spindle 4. Supply of the working medium – to any of the pipes. The crane is switched manually by turning the handle 15 by 90°. Stopping in the extreme positions is provided by a stop 16 fixed on the body and the spout of the handle 15. The spatial position of the crane on the pipeline is arbitrary.

Шаровой кран фланцевый «Дуплекс» DN 15-100 PN 1,6-4,0 МПа

Диаграмма стойкости фторопласта

Fluoroplast resistance diagram



DesignationMaterials used in various valve versions
1Valve bodySteel 12X18N10TSteel 20Steel 09 G2S
2Branch pipe
3PlugSteel 12X18N10T
4EmphasisSteel 12X18N10TSteel 20Steel 09 G2S
5SpindleSteel 14X17N2
6HandleCarbon steel with zinc coating
7BushingSteel 14X17N2
8SaddleFluoroplast F4
9Sealing ringFluoroplast F4
10Sealing ring
11Rubber ringEP-503 or H-183 (depending on the working environment)
12Poppet springSteel 60X2A
13Nut boltStainless steel
14Nut boltStainless steelCarbon SteelSteel 09 G2S
15Stud boltSteel 20X13Steel 35Steel 09 G2S


DesignationDNPNØDD1D2LdnНL1Weight . kg3D model




















Flange versions according to GOST 33259-2015
a) – version E; b) – version F; c) – version C, L;

d) – execution D, M.



DN D2 D3  D4D5,D7  D6,D8 h h1h2 
 10 42 24 34 23 35 4 3
15 47 29 39 28 403
 20 58 36 50 35 51
 25 68 43 57 42 58
 32 78 51 65 50 66
 4088  61 75 60 76
 50 10273  87 72 88
 65122  95 109 94110 
 80 133 106 120 105 121
 100 158 129 149 128 150
 125 184 155 175 154 176
 150 212 183 203 182 204
 200 268/278/285 239 259 238 260

The Duplex flanged ball valve is installed on pipelines through which aggressive liquid and gaseous media are transported under pressure from 1.6 to 4 MPa with a heating temperature of up to 160 ° C. They are recommended for use in thermal power, chemical, oil refining and other industrial enterprises.

Construction Description

Important technical and operational features of this shut-off valve include:

  • collapsible structure with removable nozzle;
  • small metal consumption;
  • possibility of installation instead of standard valves;
  • low cost;
  • a large time to failure.


The cranes of the Duplex series are produced in three versions of the housing:

  • stainless steel grade 12X18N10T;
  • carbon steel St20;
  • frost-resistant alloy 09G2S.


Manual control via a rotary knob without the possibility of fixing the angle of rotation in an intermediate position.


Technical specifications

  • the working pressure of the transported medium is 1.6, 2.5 or 4.0 MPa, depending on the housing material;
  • temperature from -60°C to +160°C;
  • climatic version of UHL, from -60°C to +50 °C;
  • the diameter range of the conditional passage is from 15 to 100 mm;
  • the connection to the pipeline is flanged;
  • spatial position – any;
  • the estimated service life is 10 years.


The housing design and the sealing material are selected depending on the future operating conditions and the aggressiveness of the transported medium.



The price of a Duplex flanged ball valve varies depending on many factors, including pressure, diameter and material design. Additionally, the individual wishes of the customer are taken into account.

You can buy a ball valve at an affordable price in JSC “RC “Fobos” by making an application by phone 8 (800) 700-62-60 (Moscow and all Russia) or using the services of regional managers, as well as by e-mail

Delivery of cranes “Duplex” is carried out by the services of transport companies – Business lines, PEC. Transportation is also carried out by rail Zheldorexpedition and other types of delivery with payment for transport services and cargo insurance services by the buyer.

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