Cast Steel Floating Ball Valve

Description

Design standard	API6D、ASME B*6.*4、BS***1、ISO****2、DIN
connection ends	RF、RTJ flange、butt-welded、thread、socket welded
Operation	Manual、Pneumatic、Electric、Gas-liquid interaction etc.
Nominal diameter	1/2 8 (DN **-DN **0)
Pressure range	CLASS **0 CLASS **0 (Mpa 1.*- Mpa *0.0)
Materials	carbon steel、stainless steel、*0#steel 、Nickel alloy、Cobalt alloy
Temperature	***6℃***0℃
Industries	Petroleum、Natural gas、Chemical、petrochemical、Power station、Metallurgy、Papermaking etc.

　　Unique design of the valve seat sealing structure
With experience of years in ball valve manufacturing and domestic and foreign advanced technology. Our double sealing seat can ensure the seal is reliable. The professional valve seat processing make the coefficient of friction is low and the valve operating torque is small.
　　The handle can be indicative of the switch state of valve
　　The stem head is with a flat square structure and the connection with the handle will not misplace. So it can ensure the handle and the flow direction are in the same direction. When the handle is parallel with the pipeline, the valve is in open state. When the handle and the pipeline are vertical, the valve is in closed state.
　　Locking device
　　To avoid the unnecessary switch action by misoperation and unpredictable pipeline vibration, the locking hole has been set in the position of fully open and fully closed of valve and the padlock can be used to lock the valve. Especially the valve is installed in the field or in the combustible medium petroleum and chemical production line; the locking device will show its unique superiority
　　The stem anti-fly structure
　　When the valve cavity pressure rises, the stem may be launched by the pressure in the cavity. To prevent this from happening, the stem is provided with a shaft shoulder in the lower part and the stem is installed from the inner part of the valve body so as to prevent it from flying out. Its more convenient and safe for the replacement of packing. At the same time, the flange of stem and the valve body upper sealing surface will be contacted tightly by the medium pressure when in case of fire. Then it can prevent a lot of medium from leaking in the damaged filling part and play the role of instantaneous seal.
　　Anti-static design
　　When the valve is in operation, the static will be produced and build up on the ball sphere because of the friction between the ball and the seat. To prevent the electrostatic spark, the anti-static device is set on the valve to lead out the static electricity produced during the switching. This design can prevent the occurrence of accidents effectively in the medium with lower ignition point such as gasoline, natural gas, propane in valve.
The middle flange (body and left body connecting part) no leakage structure.
The valve body and left connecting part is based on gasket. In order to prevent leakage caused by fire, high temperature or vibration etc. The valve body and left part connection is specially designed as metal-to-metal contact and make it form a stop flange to ensure no leakage.
　　Fire-proof structure
　　In case of fire the valve seat, packing and other non-metallic materials will be burnt out and a large number of leakage of the medium may be more for the fire. The fireproof structure can stop the leakage of medium. All the possible leakage positions (ball and body, valve stem and body, middle flange) are designed as metal-to-metal contact. In case that the seat is burnt out, ball will contact the metal face directly under the pressure so as to prevent the leakage of medium from the burnt seat.
　　The ISO***1 connection plate
　　ISO***1 connection plate is in line with international standards and can be convenient for customers to choose the electrical, pneumatic, hydraulic device according to the need of project.