Pneumatic knife type flange slurry valve

What is DZ643X pneumatic flange slurry knife gate valve?

DZ643X is a slurry cut-off valve that uses flange connections, blade type gate valves, and pneumatic actuators. The gate is driven by a cylinder for linear lifting and can be used for opening and isolating some slurry, sewage, and solid containing media.

PN10 flange valve body and lining rubber structure

DZ643X adopts PN10 grade, WCB carbon steel valve body, flange connection and rubber lining structure, with a specification range of DN50–DN500. Rubber lining does not directly equate to a certain type of rubber: EPDM, NBR, and natural rubber have different media applicability, and the matching gate, valve seat, and sealing structure need to be determined based on the slurry particles, concentration, temperature, and closing pressure difference.

What is the difference between flange type and wafer-type?

The flange type valve body is fully connected to the pipeline flange, and the structural length and installation method are different from those of the clamp product. It cannot be simply assumed that the flange type has higher pressure resistance or that the wafer-type is easier to maintain. Ultimately, the specific product design and project pipeline conditions should prevail.

What working conditions is the rubber lining structure suitable for?

Rubber lining can be used for some slurry conditions that require wear resistance or medium corrosion resistance, but the properties of materials such as EPDM, NBR, and natural rubber are not the same. The selection must be confirmed based on the composition of the medium, particles, temperature, and actual rubber material.

Can pneumatic knife gate valves continuously regulate flow?

This product should first be understood as an opening and closing and shut-off valve. Pneumatic actuators can achieve remote control, but their suitability for continuous regulation still depends on the valve structure, flow characteristics, and flushing risk. They should not be defined as professional regulating valves simply because they are equipped with cylinders or positioners.

What parameters are required for selection?

Suggest providing slurry or slurry composition, solid concentration, maximum particle size, abrasiveness, temperature, pressure, etc DN、 Flange standards, lining materials, gas source pressure, opening and closing frequency, and fault safety requirements.

DZ643X Pneumatic Flange Slurry Valve Common Problems

Can DZ643X be used by default for all strongly corrosive slurries?

No. The valve body and lining material of WCB must be confirmed based on the composition, temperature, concentration, and abrasiveness of the medium.

Is the pneumatic knife type gate valve equipped with a positioner a regulating valve?

No. The locator can only control the position of the actuator, and whether it can be continuously adjusted depends on the flow characteristics and operating conditions of the valve itself.

Why should particle size be provided for the selection of flange type slurry knife gate valve?

Particle size and hardness can affect gate cutting, valve seat wear, blockage risk, and material selection, making them important conditions for selecting slurry valves.