Top Entry Ball Valve (Q341-900)

Structural Characteristic
We adopt the Germany advanced technology and apply it in our new products by years of R&D, we develope Rayomond special Top-entry ball valve. With technology up to domestic leading level, these products can compete with the international counterparts. Besides the features borne by the side installed fixed ball valve (see trunnion ball valve), they are also given the features below:
1. One-piece valve body, top installed trunnion to fix and support, flanged or butt welded structure.
2. Inconel bellows spring makes the sealed metal seat moving toward the ball, providing the two way seal function of inlet and outlet.
3. Distinctive technology of retractable valve seat, inline replace ability of ball arm, valve stem sealing ring, metal seat and bellows spring, and torque down to the minimum for the ease of operation.
4. Ease of repair and installation, long performance life. Access for repair and replacement of trims may be done with no need to remove the valve from the pipeline, thus to lengthen the service life.
5. Low torque, reliable sealing, and spherical seat different from ordinary ball valves, which can automatically adjust the position of seal.
6. Preset platform and bolt holes for drive device, and to ISO5211. Drive device can be installed according to users' different requirements.
7. DBB (double block and bleed) function.
8. Hand operated top installed ball valve adopts high strength one-piece ball arm structure to ensure the precise positioning of the ball
9. Anti-blowout protective structure of valve stem to enhance the operational safety of the valve.
Torque Chart (N.M)
The torque ratings listed below are for the reference to choose a drive device. The properties of medium, trims and valve open frequency shall be considered as extra factors. For instance, valves with corrosion-resistant trims to deal with clean lubricating mediums, their torque may be lowered by 20%. However, to deal with stringent mediums like slurry, granular medium and oxygen, the torque may be increased by 50%. The operating torque of drawing-down valves is subject to the corresponding diameter to their neckings. (Specific options as per the actual).

Technical Specifications:
Design and Manufacture: API608, API 6D , BS5351
Connection Type:
1. Flanged welded connection: ASME B16.5 ASME B16.47
2. Butt welded connection: ASME B16.25

Pressure Test: API6D, API598

Fire Safe Test : API 6FA

Operator: Manual, Worm gear, Pneumatic, Electric actuator