Face To Face:
Test And Inspection:
API 598/ISO 5208
ISO9001, ISO14001, ISO28001, TS, CE,TUV
PS: We also can make products according to customer's drawing.
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
injection. It is effectively avoiding the leakage caused by the seat rings
are unexpectedly damaged.
When the valve is closed, the pressure in the body cavity will be
accumulated , and the pressure is removed by opening the blow-off
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.
Standard Bolts & Nuts
DBV ball valve adopts the standard bolts and nuts. It could
extend the valve longer service life.
DBV trunnion ball valve design forms a electrostatic channel through ball, stem and body.
This structure leads the electrostatic spark to the earth caused by the friction between the
ball and the seat. This structure could avoid the fire disaster and explosive accident.
The platform design is convenient for assembling worm gear, pneumatic, electric, hydraulic and
pneumatic & hydraulic actuators.
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
Nitriding Thicken Stem Design
Factory Direct Sales
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?
A：We have photos and videos on our website, youtube and facebook, It shows every step of our manufacturing.
DBV VALVE GROUP CO., LTD is manufacturer of valves.
Shanghai Factory : No.255 Shenjiabang Road, Baihe Town, Qingpu District Shanghai China
If you like our valves, please bookmark our Facebook,Twitter, which is easier to find us. if you need it one day in the future,we do appreciate it for your kindness.
3 piece forged Trunnion Ball Valve
GB/T 12237 /B/T 19672
API 608 /API 6D
Face To Face
GB/T 12221/ GB/T 19672
ASME B 16.10 / API 6D
ASME B 16.5/MSS SP-44/ASME B 16.47
Test & Inspection
JB/T 9092 GB/T19672
PS: We also can do according to customer's requirements.
1. Urgent Grease Injection Device: Trunnion ball valve(DN≥150) aims to prevent the medium leakage of the seal ring and stem.
2. Blow-out proof stem: Prevent the stem blowing out caused by the abnormal increase of pressure.
3. Fire-proof Design: When the fire disaster occurs, and the non-metallic seat and sealing parts are damaged
under high temperature, our unique design of metal to metal auxiliary seal structure has an deep effect to
prevent the leakage of the media.
4. Anti-static Design: DBV trunnion ball valve design forms a electrostatic channel through ball, stem and body. This structure leads the electrostatic spark to the earth caused by the friction between the ball and the seat. This structure could avoid the fire disaster and explosive accident.
5. Standard Single Piston Action（Self-relieving Seat）: The fluid pressure, both upstream and downstream creates a resultant thrust that pushes the seat rings closed to the ball. The fluid pressure acting in the body cavity creates a resultant thrust that pushes the seat rings away from the ball. The single piston design permits the automatic release of any over pressure in the body cavity when the valve is in the fully open or fully closed position, therefore the seat rings are "self-relieving".
Optional Double Piston Action: The fluid pressure acting in the body cavity, both upstream and downstream creates a resultant thrust that pushes the seat rings closed to the ball. The seat rings of the valve with double piston action require a relief valve in order to reduce the over pressure in the body cavity.
6. Actuator Installation Yoke: This structure facilitates to install the actuators, such as pneumatic, electric, ,hydraulic and pneumatic&hydraulic, etc.
Material for Main Parts
WCB, CF8, CF8M, LCB, LCC, A105, F304/L, F316/L, LF2, etc
25+ENP, A105+ENP, 304, 316, LF2+ENP, etc.
17-4PH,304,316, 1Cr13, 2Cr13, 410,420,LF2 etc.
PTFE, RPTFE, DEVLON, PEEK, 304+ni55, 316+ni55, LF2+NI55, 304+STL,316+STL
1. Factory Overview
2. Quality Control
3. Storage and Warehouse
4. Package and Delivery
5. Honor and Certificate
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