GOST 33259 Flange Ball Valve - Trunnion mounted ball valve


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GOST 33259 Flange Ball Valve
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GOST 33259 Flange Ball Valve

  • Product description:

    GOST 33259 Flange Ball Valve Material: Body: LF2 ; Disc: LF2, Stem: 17-4PH. Seat: RPTFE Nominal Pressure PN16 Nominal Diameter: DN300-DN500 Gear box operated

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GOST 33259 Flange Ball Valve

1g Valve description



Body: LF2 ; Disc: LF2, Stem: 17-4PH. Seat: RPTFE 

Nominal Pressure


Nominal Diameter:


End Sealing:


Face To Face:

API 608

Working Temperature:


Test And Inspection:

API 598/ISO 5208

End Connection:



NACE 0175


ISO9001, ISO14001, ISO28001, TS, CE,TUV

Trunnion Ball Valve Drawing

PSWe also can make products according to customer's drawing.

2g valve details


Grease Injection Design On Stem

DBV trunnion ball valve (DN≥150,NPS6)adopts the design of grease

injection.  It  is effectively avoiding the leakage caused by the stem O

rings are unexpectedly damaged.


Grease Injection Design On Seat

DBV trunnion ball valve (DN≥150,NPS6)adopts the design of grease

injection.  It  is effectively avoiding the leakage caused by the seat rings

are unexpectedly damaged.


No Bottom-Cover Design

DBV trunnion ball valve adopts this structure to make the valve

beautiful,  and it needs smaller installation position. 


Blow-off Design

When the valve is closed, the pressure in the body cavity will be accumulated , and the pressure is removed by opening the blow-off valve. 


Drain Valve Design

The seal of the trunnion ball valve is achieved by the floating seat.When

the waste of the inner cavity is removed through drain valve, the pressure will exist between the inlet and outlet end of the compression seat, and it is easier to achieve the sealing performance.

3g why dbv valve

  Outer Trunnion Ball  


The trunnion ball is the standard deisign for ball valves, which guarantees an 

easy assembling into valve, a wide surface for washers (reducing friction and 

torque).The ball can only turn around its own axe (trunnion axe) and sealing 

is guaranteed by the axial movement of the seats for springs or inline pressure.The

trunnion design is suggested for medium and big dimensions and enables to avoid

 high torque during opening or closing phase with inline pressure. The critical issue

 for these products consists in the poor material between the bore and the washer

 area it occurs an easier deformation of the ball for high pressure and consequently

leakage between seats and ball.

  Inner Trunnion Ball  


This structure is suitable for small size valve or higher pressure

environment. With simple design and convenient maching, this

ball guarantees a stronger resistance of the ball than the outer,

and so less deformation in high pressure condition reducing the

risk of leakage between ball and seats. However, it's critical for

the valve assembling especially for big dimensions; limited space

for washers.

  Product Comparison  


Painting comparision

  Nitriding Thicken Stem Design  

Ball Valve Stem

  Factory Direct Sales  

DBV FACTORYDBV Butterfly Valve 

Quality, transportation, after-sales

4g FQ                   

  Q1. Are you a factory or trading company?

  A: We are a factory specialized in manufacturing valves 20 years. We both have factory in Wenzhou and Shanghai.

  Q2. Can I have a sample order for valve?

  A: Yes, we welcome sample order to test and check quality.Mixed samples are acceptable. 

  Q3.Do you have any MOQ limit for valve order?

  A: Low MOQ, 1pc for sample checking is available

  Q4. How do you ship the goods?

  A: We usually ship by sea, by air, by courier, etc.

  Q5. How to check the process of the order?

  A: You can check your order on our website after we provide you account and password.

  Q6: Do you offer guarantee for the products?

  A: Yes, we offer 2 years warranty to our products and we could repair freely for lifelong time.

  Q7: Can you put our Logo on the valves?

  A:Yes, we can totally produce products according to your special request, even manufacture them base on your drawing.

  Q8: How can I check your factory situation while it's difficult for me to come to China?

  AWe have photos and videos on our website, youtube and facebook, It shows every step of our manufacturing.

5g Contact us
Butterfly Valve Contact

Company Profile:

DBV VALVE CO., LTD is manufacturer of valves.

more detail

Email: info@dbv-armaturen.com

Wenzhou Factory :No.96 Fanhua East Road,OuBei,WenZhou,Zhejiang,China,325102

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