Flanged Ball valves with reduced bore (DN25-80, PN1.6 MPa)


on technological lines of chemical, oil refining, pulp and paper and other industries with liquid, gaseous, including aggressive, working media.

Flanged Ball valves with reduced bore FB 39  are designed for installation as Russian-made shut-off devices. Distinctive features are the shortened construction length, low metal consumption, compactness, high reliability and die-welded construction of the case, Russian production.

Production: ЗАО «Арматурная Компания «ФОБОС», Россия
Cost: по запросу
Working mediumMedia where the valve material is corrosion-resistant
Working pressure, MPa 1,6; 2,5; 4,0
Working medium temperature – 40°С…+160 °С
The tightness class of the gate according to GOST 9544-2015А
Climatic version according to GOST 15150-69U1 (-40°C…+40°C) or UHL1 (-60°C…+50°C)
Handle turning force, N150 max
Total service life, cycles8000
The full service life10

Flanged Ball valves with reduced bore consists of a housing 1 and side fittings 2, pressing the fluoroplastic seats 5 to the floating ball plug 3. The detachable connection of the fitting 2 with the housing 1 is sealed with a ring 10. The counter-flying spindle 4 is sealed with two fluoroplastic gaskets 6 and 7. The supply of the working medium is to any of the fittings. The crane is switched manually by turning the handle 11 by 90″. The spatial position of the crane on the pipeline is arbitrary. Cranes can be equipped with a position lock.


Download (small catalog)

1Valve bodySteel 12X18N10TSteel 20Steel 09G2S
3PlugSteel 12X18N10TSteel 20Steel 09G2S
4SpindleSteel 14X17N2
5SeatPTFE F4
6O-ringPTFE F4
7O-ringPTFE F4
9Nut boltSteel 20X13
10RingPTFE F4
11HandleSteel 08H18N1 OT

PNDNDD1D2ndАLL1HWeight, kg3D model
FB 39.010.025*16252057854149070134921,6


FB 39.010.05050408712518125952501256,1


FB 39.010.080806512016015012013712,3



Flanged Ball valves with reduced bore

Incomplete ball valves have a smaller diameter of the outlet compared to the pipeline. This increases the coefficient of hydraulic resistance, and the possibility of rapid overlap reduces the likelihood of a water hammer.

Also, the reduced thickness reduces the load on the locking ball, which significantly increases its service life. By reducing the flow, the force required to stop the movement is reduced. Most devices are equipped with symmetrical passage reduction around the perimeter. This makes it possible to install either side to the direction of movement of the working fluid.

The great advantage of incomplete products is the simplicity of the mechanism and low material consumption. This reduces the weight of the structure and its cost. Thus, these options can be used in plastic pipelines of increased dimensions. Reducing the load on the pipes prolongs their service life and protects the pipes from deformation and mechanical damage.

The main advantages of an incomplete ball valve are:

  • simplified management;
  • quick installation;
  • favorable price;
  • light weight.

Such pipe fittings are used on both domestic and industrial systems. They are able to work with liquid and gaseous aggressive substances.



The price of an incomplete ball valve varies depending on a variety of factors, including pressure, diameter and material performance. Additionally, the individual wishes of the customer are taken into account.

You can buy an incomplete crane at a low cost 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 ball valves is carried out by the services of transport companies – Business Lines, PEC. Also, transportation is 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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