Manual knife type flange slurry valve

What is DZ43X manual flange slurry knife gate valve?

DZ43X adopts flange connection and knife type gate, and the gate is raised and lowered through manual transmission such as handwheel to achieve pipeline opening and closing. Knife shaped structures are commonly used in slurries, slurries, wastewater, and some media containing particles or fibers.

Diameter, pressure rating, and valve body material

The specification range of DZ43X is DN50–DN500, with a nominal pressure of PN10. The valve body is made of WCB carbon steel. When selecting, in addition to confirming the diameter, flange size, and valve body pressure bearing material, the gate, valve seat, and sealing materials should also be determined based on the size, concentration, and working pressure difference of the slurry particles, to avoid using the valve body material as the material for all liquid receiving parts.

What is the function of a knife shaped gate?

Thin gate plates can pass through some slurry and fiber media during the closing process, but cannot promise to cut solids of any size and hardness. Large particles, metal impurities, or high hardness media may cause jamming and damage, and should be clearly identified during selection.

In what situations is manual operation suitable?

Manual operation is suitable for situations that do not require automatic interlocking or high-frequency remote opening and closing. When the diameter is larger, the pressure difference is higher, or the operating frequency is higher, the operating force and whether gears or automatic actuators are needed should be evaluated.

Can flange knife gate valves operate half open for a long time?

Usually used fully open or fully closed. When the slurry passes through the small opening area at high speed, it may cause local erosion of the gate and valve seat. Therefore, long-term throttling should be evaluated based on the actual structure and working conditions.

What parameters are required for selection?

Suggest providing the medium, solid concentration, particle size, temperature, pressure DN、 Pipeline flange standards, valve body/gate/seat material requirements, opening and closing frequency, and installation space.

DZ43X Manual Slurry Knife Gate Valve Common Problems

Can DZ43X cut off any hard particles?

No. Knife type gate is suitable for some slurry, fiber, and granular media, but particle size, hardness, and concentration exceeding the allowable range of the structure may still cause jamming or damage.

Do manual knife gate valves need to be equipped with gearboxes?

not always. Whether gear transmission is required depends on the diameter, pressure difference, sealing friction, and allowable operating force.

Can DZ43X be used as a continuous control valve?

The main purpose is to cut off isolation; When long-term continuous adjustment is required, the flow characteristics and slurry flushing risk should be checked.