Stainless Steel Trunnion Ball Valve
MAIN FEATURES:
The top-entry ball valve is designed as an integrated valve body. Its support and ball rod fixed by an
upper-assembled pivot and an integrated pivot respectively and the integrated high-strength ball rod
ensure an accurate ball positioning. The unique technology of retractable valve seat is adopted,
realizing online replacement of valve stem, valve stem seal rings, metal valve seats and preloaded
springs.
Design Features
The ball valve are designed in accordance with ISO14313,API 6D,API608,BS 5351;
Simple structure with good tightness and small torque;
One piece type body;
Have reduce bore and full bore with the minimum flow resistance (zero actually);
Emergency sealant injection;
Cavity pressure self relief;
Low emission packing;
Fire safe, anti-static and anti-blowout stem design;
Valve seat function DBB, DIB-1, DIB-2;
Optional extended bonnet.
TOP ENTRY BALL VALVE is mainly used in pipeline and industry system and it has a top entry and
on line maintenance function.It has a lot of advantages,such as small fluid resistance,simple structure,
small volume,light weight,reliable saaling,convenience for operation and maintenance,open and close
quickly,as well as start and close flexibly.
1.One piece body
One piece body is used for the body to guarantee sufficient strength and rigidity under maximum rated
operating pressure.The internal parts of valve are carefully designed and selected to ensure reliability
under all kinds of operating condition.Enough margin wall thckness and adaptation of high strength
connective bolts are convenient for valve maitenance and sufficiency to support the stress from piping.
2.Top entry
Its most difference from common ball valve is that its maintenance can be made on pipe line and without
dismounting from the pipe line.The back space seat structure is adopted for the seat and the rear portion
of seat retainer is oblique angle to prevent accumulation of impurity from affecting back space of seat.
3.Low operation torque
Top entry series ball valve has a trunnion mounted ball,whose surface is ground,polished and hard face
treated.The ball and stem is integrated,sliding bearing is installed on the external bore so that the friction
radius is small and operation torque is very low.
4.Emergency sealing
Compound injection holes are designed and compound injection valves are installed at locations of
stem/cap and body support of side valve.When sealing of stem or seat is damaged to induce leakage,
the compound can be used to do the second time sealing.A concealed check valve is installed in side
of each compound injection valve to prevent compound from out flowing due to the action of transmitter
substance.The top of the compound injection valve is the connector for fast connection with compound
injection gun.
5.Reliable sealing
The seat sealing is formed by seat sealing and metal retainer component.The seat retainer floats axially
and low pressure sealing of valve seat is reached by pre-pressure of spring.In addition,the piston effect
of valve seat is designed reasonably,which realized high pressure sealing by the pressure of operating
medium and realize the interception of retainer to form the sealing of the body.The expansion graphite
ring is designed to realize sealing under fire condition.
6.Double block&bleed(DBB)
When ball is full open or close position,the transmitter substance in center cavity of body can be released
by drainage and emptying devices.In addition,the over loaded pressure in the center cavity of valve can be
released to low pressure end by self relief seat.
7.Anti-static and fire safe design
The fire prevention design of valve meets the requirement in API6FA/API607 standard and the design of
the anti-static conforms to regulations in API6D and BS5351.
8.Extension stem
For the underground installed valve,the stem can be lengthened and for the convenience of operation the
corresponding compound injection nozzle and drainage valve can be extended to the top of valve.
9.Various driving types
The top pad of valve designed according to ISO 5211,which is convenient for connection and exchange of
various drivers.The common driving types are manual,electrical,pneumatic and pneumatic/hydraulic.
V&C is a leading valve manufacturer in China with over two decades' experience in the design and supply of industrial valves and pipe fittings.
V&C valve manufacturer provide high-quality products and excellent services to Oil & Gas, Petrochemical, Chemical, Energy & Power, Marine and Mining industries from general to severe in application.
Our product range includes Ball Valves, Control Valves, Choke Valves, Gate, Globe & Check Valves, Safety Relief Valves, Automatic Recirculation Valves, Other Industrial Valves, Wellhead Equipment, Pipe and Fittings.
V&C's diversified flow control solution consists of quarter-turn and multi-turn valves in a variety of steel materials, trims, configurations, sizes, pressure classes, which are designed and tailor-made to meet your specified process requirements.
V&C Valves are licensed and certified to API 6D, API 6A, API 600, API 607/API 6FA, ISO 9001 and other monograms or approvals, such as CE, BV, DNV, TUV, SGS, PED and ATEX.
V&C focus on safety and delivery time from valve sizing, engineering, fabrication, test & inspection, painting and shipping. Our philosophy of "High Sense of Responsibility for Clients" ensures our reliability and customers' total satisfaction. V&C is dedicated to continually offering good products and services all at competitive prices worldwide.
