What is Lift plug valve ?

Non-lubricated metal seated LIFT PLUG VALVES were developed over 80 years ago to solve problems with existing valves in catalyst cracking service. As the valves preformed so well in this service it was also recommended for use in other hash applications in the chemical & petrochemical industry.As the valves preformed so well in this service it was also recommended for use in other hash applications in the chemical & petrochemical industry. To explain why the valve has been so successful we below stated the design features of the valve to provide more insides in its strengths. 

PRINCIPLE OF OPENING AND CLOSING OF THE LIFT PLUG VALVE

Opening of the valve:

• 1)turn the hand wheel to make the plug lifted and separated with the sealing surface;
• 2)then turn the handle lever by 90 degree to connect the channel of plug to the channel of valve body,so the plug valve is opened.

Closing of the valve:

• 1)turn the handle lever by 90 degree to make the channel of plug vertical to the channel of valve body
• 2)then turn the hand wheel to descend the plug,so that the valve is closed.

During the opening and closing of the valve, the plug is lifted and separated from the valve seat, so the operating torque is very small,very easy to open and close the valve. And the sealing surface is scratched proof during the opening or closing process. So the valve has longer life. The handwheel handle lifting type plug valve has a compact structure, small volume and low fluid resistance.

Main features of Lift plug valve

Features and benefits of Lift Plug Valve.

• *The product has reasonable structure, reliable sealing, excellent performance and beautiful appearance.
• *Top entry design, easy maintenance.
• *Bi-directional function, fire-safe design.
• *Simple robust design, only three major components (body/plug/bonnet).
• *Able to be used in service conditions up to 650°C .
• *Double mechanical barrier, double Block & Bleed options.
• *Metal-to-metal seat, long seat life-time, seats protected from direct flow in open and closed position.
• *Hard-faced (stellite) seat surfaces options for extra performance.
• *No lubrication! No contamination of process medium.
• *The materials of the parts and sizes of flanges can be reasonably configured according the actual operation condition of the requirements of the customers,so as to meet the various needs of engineering.

Technical specifications of Lift plug valve

Note: the size of serial valve connecting flange can be designed according to customers’ requirement.

Applications of Lift plug valve

Lift plug valve is widely used in severe working conditions,

• *chemical / petrochemical products (cracking applications)
• *crystallizing fluids
• *high viscosity fluids
• *abrasive fluids
• *fluid with solids
• *cryogenic fluids
• *acids / basis / aggressive mediums
• *gases with solids