Double Block And Bleed Valve 3/4 inch Class 600 - Trunnion mounted ball valve


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Double Block And Bleed Valve 3/4 inch Class 600
  • Double Block and Bleed valves advantage
  • DBB Valve vendor
  • Industrial Valve manufacturer

Double Block And Bleed Valve 3/4 inch Class 600

  • Product description:

    Double Block And Bleed Valve is designed to replace the complex form of multiple valve connections in conventional piping. Reduce leaks in the system,quickly achieve emissions,and turn off functions. The double block and bleed ball valve greatly save

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3/4" Double Block And Bleed Valve,Class 600#,RF*NPT,Lever Operation

1g Valve description

DBB Valve manufacturer


                                                  Body: LF3

Nominal Pressure


Nominal Diameter:


End Sealing:


Face To Face:


Working Temperature:


Test And Inspection:


End Connection:



NACE 0175


ISO9001, ISO14001, ISO28001, TS, CE,TUV

PSWe also can do according to customer's requirements.

2g valve details

Drain Valve Design

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's easier to achieve the sealing performance

Locked structure

DBV Locked structure

For valves installed in the field or to prevent misoperation

by non-workers, and in some occasions where the vibration

is large, the handle is subject to impact and easy to operate 

incorrectly. There is no locking hole in the fully open or fully

closed position of the valve. Lock, safe and secure

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 bal.

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  


Carbon Steel Ball ValveIndustrial Valve

 Nitriding Thicken Stem Design  

Ball Valve Stem

 Factory Direct Sales 


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 details>

Email: [email protected]  

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

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