Knife Gate Valves
Knife Gate Valves from CMO, CYL and other
manufacturers for their ability to handle powder,
sludge and solids in suspension in liquids. Their
low weight, slim build and guillotine action are
important advantages in addition to their greater
suitability over other valve types for many
services. They give 100% tight shut-off can be
provided with a V-shaped orifice for flow control
or a square orifice to suit the adjacent pipework.
Available with handwheel, lever, pneumatic,
hydraulic or electric actuation. They are made with
two main types of seating. The more common is the
face seal which seals in one direction by the line
pressure pushing the blade onto the seat. The
bi-directional valve has an edge seal which has the
additional advantage of having a completely clear
bore when the valve is fully open. An option for
powders and similar services is the through-conduit
design in which there are two seats, one each side
of the bade, that seal on the faces of the blade
and the blade has a hole which lines-up with the
bore of the body when the valve is open. The blade
retracts when closing and there is not possibility
of trapping solids between blade and seat.
Advantages over other valve types are as follows
Unlike conventional wedge gate valves, there is no wedging action to cause the blade to jam and the overall length is less which helps in confined spaces.
Unlike ball valves, there are no cavities or dead areas in which material can settle/ We have replaced Ball valves with high pressure Knife Gate valves in mud lines in the Oil & Gas Exploration Industry. The shorter overall length is an advantage which helps in confined spaces.
Unlike butterfly valves there are no restrictions in the bore when the valve is fully open and the blade does not have to push material aside when opening and closing.
Advantages over other valve types are as follows
Unlike conventional wedge gate valves, there is no wedging action to cause the blade to jam and the overall length is less which helps in confined spaces.
Unlike ball valves, there are no cavities or dead areas in which material can settle/ We have replaced Ball valves with high pressure Knife Gate valves in mud lines in the Oil & Gas Exploration Industry. The shorter overall length is an advantage which helps in confined spaces.
Unlike butterfly valves there are no restrictions in the bore when the valve is fully open and the blade does not have to push material aside when opening and closing.