Dmmond SQ

Squared Knife Gate Valves

Squared or rectangulas knife gate valves for discharging loaded fluids with solids in silos.

Dmmond SQ Squared Knife Gate Valves
At paravalves, every development has in-house engineering and manufacturing facilities for a wide range of industrial applications anywhere in the world.
We work from the delivery and dedication, from the person. Always open to any need, project, industry and customer. With the proactivity and intelligence necessary to face any challenge proposed to us. An engineering and manufacturing team that goes hand in hand with the customer, to always offer a reliable product, with high performance and durability.
Our Dmmond SQ valves are divided in different types depending on the design pressure or construction.

SQ Squared Knife Gate Valves

Beyond the valve

The Paravalves Dmmond SQ welded construction knife gate is designed with a square or rectangular section for the main inlet and outlet bore. The precision machined knife gate edge is capable of easily cutting through media while maintaining the metal seat in the valve. The knife gate is fully guided with bronze supports throughout the stroke, improving valve life and performance for the most demanding applications. Mainly used for handling fluids heavily loaded with solids in gravity discharge in horizontal valve position.

Up to
In all sizes
Up to

Customized valves

We design and manufacture customized solutions for each customer and need.

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Zero atmospheric leakage.

Even for gas or high pressure water applications.

At paravalves Dmmond SQ Squared or Rectangular knife gate valves special top gate sealing concept is designed to ensure full tightness to the atmosphere even for gas or high pressure 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.

Working under the most extreme condition with wear rings.

Protect the valve, work in any situation.

Wear rings or other special materials are available under request for extreme condition applications, ensuring best performance of the valve at heavy duty applications as well as a longer life for the equipment.

Engineered to last.

Even for extreme working conditions with abrasive fluids.

From optimized parametric design 3D modeling tools, to Finite Element Analysis (FEA) and Computational Fluid Dynamics (CFD) systems, our reliable knife gate valves are ready to be manufactured with confidence.

Every component is designed and validated by top-notch softwares by the paravalves engineering team.

Fully guided stroke

Bronze guiding for an optimal performance

The Valve is fully guided with bronze guides throughout the entire stroke, improving valve life and performance for the most demanding applications. These guides are also adjustable to ensure optimum sealing.

One design to rule them all.

Direct handwheel, Gearbox, Electric actuator, Pneumatic or Hydraulic cylinder actuation types are possible with Dmmond SQ Squared 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.





Electric Bernard

Electric Bernard

Electric AUMA

Electric AUMA

D/A Pneumatic

D/A Pneumatic

D/A Hydraulic

D/A Hydraulic

Main features

Working pressures up to 3bar.

Sizes up to 1000x1000mm.

Seat designed according to the application.

High flow rates and low pressure drops.

Inlet deflector cone on request.

Flushing/plug ports included.

Unidirectional design (metalic or soft).

Easy maintenance.

Rising or non-rising stem design.

Robust and reliable design.

Tailor-made solutions.

On/Off service.

Flange drillings to customer request.

Epoxy coating for carbon steel components.

ISO 5210 flange drillings for interchangeable actuators.

Special materials or surface treatments on request.

Pneumatic, Hydraulic, Electric or manual operation.

Related industries

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:


Can we help you with anything?

If you need a quotation for any of our products, have any questions, suggestions or want to distribute our valves, we will be more than happy to answer you.