Lined Knife Gate Valve
Fully interchangeable lining knife gate valves specially designed for abrasive applications with maximum durability and high performance.
Beyond the valve
Paravalves Dmmond XA Lined knife gate valves are engineered and built to handle extreme working conditions for abrasive fluids and high-pressure services. In addition, our XA type knife gate valves provide a bubble tight shut-off and extended service life for the most demanding mining and mineral processing applications.
The main characteristic of the lined knife gate valve is that it provides a full continuous flow. Thanks to the combination of its specially designed polyurethane sleeve and the split body design, when the knife fits completely the sleeve zero-leakage is achieved. Thanks to the replaceable sleeve concept valve maintenance can be easily done, even on field. Installation of this equipment is done between pipeline flanges, which flange drilling can be made according to customer specifications or paravalves standard.
where no solid can be stacked.
The main characteristic of this Lined knife gate valve design is that it provides a self-flushing concept
where not solids can be stacked.
As the knife gate closes, flow area is reduced thus increasing flow velocity and turbulences. These turbulences create a self-flushing performance in the inner sleeve groove and ensures a tight sealing when knife gate finally is fully closed.
Dmmond XA Lined knife gate valves are designed with top quality materials and abrasion resistance special polyurethane able to isolate severe slurries time after time, regardless of how often the valve is actuated.
True bi-directional zero leak shut-off.
designed to avoid atmosferic leakage.
The valve is fully symmetrically designed and it’s able to withstand the fluid media in both directions.
A specially designed outgoing molded profile among the U-shaped area, ensures a perfect match between the sleeve and the knife gate plate, providing a full tightening performance for the most demanding applications.
Every design is fully hydrostatically tested at our facilities according to API 598, testing the valve seat at 1.1 times the design pressure in both directions.
Easy maintenance. A cost-effective solution.
easier maintenance for a longer valve life.
The split-body construction and the snap-in sleeve design allows maintenance to be an easy work that can be performed on field. There is no need to return the valve to factory for repair as a fully lined solution can be replaced on-site.
Valve life is increased considerably in comparison with actual slurry knife gate valves with sleeves concept, in addition to its easy maintenance and superior performance we are sure that Dmmond XA Lined knife gate valves are a great cost-effective solution.
Zero atmospheric leakage
Even for gas or high pressure water applications
At paravalves Dmmond XA special top gate sealing concept is designed to ensure full tightness to the atmosphere even for gas or highpressure water applications.
Every design is fully hydrostatically tested at our facilities according to API 598, testing body cavity at 1.5 times
the design pressure.
Replaceable polyurethane sleeve
easily replaceable concept, hard wear solution.
The top-quality one-piece polyurethane liner sleeve can be easily replaced on field. Our materials can withstand abrasive flow medias and can give a great wear resistance performance for severe service applications. Our unique one-piece sleeve liner has been performed as a precision molded element with high strength polyurethane to protect the wetted parts, from corrosion and abrasion.
Integral flange seals.
designed to avoid using flange gaskets in the pipeline.
The polyurethane sleeve has been designed to avoid using flange gaskets in the pipeline. Its unique design provides an integral flange seal ensuring no leak between the knife gate valve and the pipeline.
One design to rule them all.
Direct handwheel, Gearbox, Electric actuator, Pneumatic or Hydraulic cylinder actuation types are possible with Dmmond XA Lined Knife Gate Valves. The design allows actuators to be interchangeable each other even without removing the valve from the pipeline. It most cases, drilled according to ISO 5210 standard.
Working pressures up to 20bar.
High flow rates and low pressure drops.
Epoxy coating for carbon steel components.
Sizes up to DN600.
Bi-directional leakproof design.
Rising or non-rising stem design.
ISO 5210 drillings for interchangeable actuators.
Pneumatic, Hydraulic, Electric or manual actuation.
Working temperatures up to 200ºC.
Flange drillings to most standards.
Special materials or treatments on request.
Robust and reliable design.
Removable inner sleeve.
Rising or non-rising stem design.
Over time, PARAVALVES team has had the chance to analyze not only the design of these valves but the specific applications they are used in as well in a cost effectiveness mind. From the pulp and paper industry and wastewater treatment to the mining industry, we’re confident the PARAVALVES Dmmond Series Knife Gate Valves will be a great solution for the following industries:
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