Double Knife Gate Valves for Pulp, Residue Discharge & Fibrous Media Applications

The KV Controls DS Series Double Knife Gate Valve is engineered for high-speed on/off isolation in pulp, slurry, residue discharge and fibrous media applications. Designed for demanding industrial process systems, the DS Series features a unique double-gate mechanism that reduces valve stroke travel by 50%, enabling faster open and close cycles while improving operational efficiency.

Its cavity-free two-piece body design eliminates dead zones and minimizes media accumulation, making the DS Series ideal for handling abrasive slurry, fiber-rich process streams and difficult residue discharge applications. The self-adjusting seat arrangement improves sealing reliability and extends valve service life under severe operating conditions.

Available in pneumatic and automated configurations, the DS Series delivers reliable shut-off performance for critical process isolation systems in pulp & paper, wastewater and industrial applications.

What Is the DS Series Double Knife Gate Valve?

The DS Series is a double knife gate valve designed for high-speed isolation and process control in applications involving slurry, pulp stock, fibrous media and residue discharge systems. Unlike conventional knife gate valves, the DS Series uses a twin-gate configuration with dual cylinders that significantly reduces valve travel distance and improves cycling speed.

This specialized design enhances process efficiency and provides reliable shut-off performance in applications where fast response and dependable sealing are essential.

Double-Gate Mechanism

The twin-gate arrangement reduces the valve’s full travel stroke by approximately 50% compared to conventional knife gate valves.

Faster Open & Close Cycles

Twin-cylinder operation improves actuation speed and increases process efficiency in automated industrial systems.

Cavity-Free Valve Body

The two-piece cavity-free construction eliminates media build-up zones and improves operational cleanliness in slurry and fibrous media applications.

DS Series Double Knife Gate Valves for Industrial Process Applications

The DS Series is specifically engineered for industrial process systems involving difficult media and high-cycle operation requirements.

Pulp & Paper Applications

The DS Series is ideal for pulp stock handling, residue discharge systems and fiber-rich process streams commonly found in paper manufacturing operations.

Stock Cleaner Applications

The valve is well suited for stock cleaner systems requiring fast isolation performance and reliable shut-off under abrasive and fibrous operating conditions.

Gravity Separator Systems

The cavity-free body design and rapid actuation characteristics improve process performance in gravity separator applications.

Hydra pulper Applications

Hydra pulpers handling pulp and fibrous process media benefit from the DS Series’ reliable isolation performance and reduced clogging risk.

Slurry & Residue Discharge Systems

The valve is suitable for slurry discharge and solids handling applications requiring reliable shut-off and faster cycle operation.

Wastewater Treatment Applications

The DS Series can also be used in wastewater treatment systems involving sludge, fibrous media and difficult process conditions.

DS Series Double Knife Gate Valve Features & Benefits

The DS Series incorporates several advanced design features intended to improve process efficiency, reduce maintenance and enhance operational reliability.

Reduced Valve Stroke Travel

The double-gate configuration reduces stroke travel by approximately 50%, improving operating speed and reducing actuator cycle time.

Twin-Cylinder Operation

Dual cylinders improve open and close cycle performance for automated process applications.

Cavity-Free Two-Piece Body

The cavity-free body design prevents media accumulation and reduces the risk of clogging during operation.

Reliable Shut-Off Performance

The DS Series is engineered for secure and dependable sealing performance under pressure.

Self-Adjusting Seat Design

O-ring-loaded removable seats automatically compensate for wear, improving sealing performance and extending valve service life.

Abrasion Resistant Construction

The valve is designed to withstand abrasive slurry and fibrous media commonly found in severe industrial process applications.

Flexible Seat Material Options

Available seat materials include:

• Metal seated
• PTFE
• EPDM

Pneumatic & Automated Operation

The DS Series is available with pneumatic actuator and automated control configurations for high-cycle industrial process systems.

Technical Specifications

The DS Series double knife gate valve is available in multiple sizes, materials and configurations to suit severe-service industrial applications.

Available Sizes

DN100 to DN400

Pressure Ratings

• PN10
• PN16
• ANSI150LB

Operating Temperature

• Standard: -29°C to 100°C
• Extended: -29°C to 230°C

Air Supply Pressure

5–7 bar

Connection Type

• Wafer style

Seat Material Options

• Metal seated
• PTFE
• EPDM

Suitable Media

Suitable for:

• Pulp stock
• Slurry
• Wastewater
• Paper pulp
• Syrup
• Slag
• Fibrous media
• Residue discharge systems

Available Actuation Options

• Pneumatic actuator
• Electric actuator
• Manual operation

Why Choose the KV Controls DS Series Double Knife Gate Valve?

KV Controls supplies industrial knife gate valve solutions designed for demanding process isolation applications across South Africa and Africa.

Optimized for High-Cycle Operation

The reduced-stroke double-gate mechanism improves operational speed and process efficiency in automated systems.

Designed for Fibrous & Abrasive Media

The DS Series is specifically engineered for pulp, slurry and residue discharge applications involving difficult process media.

Reduced Media Build-Up

The cavity-free valve body design minimizes solids accumulation and improves operational reliability.

South African Technical Support

KV Controls provides local technical support, application expertise and industrial valve solutions tailored for African operating conditions.

Frequently Asked Questions

What is a double knife gate valve?

A double knife gate valve uses a twin-gate configuration to reduce valve stroke travel and improve cycle speed in industrial process applications.

What is the DS Series used for?

The DS Series is used for pulp, slurry, residue discharge and fibrous media applications requiring reliable high-speed isolation performance.

What are the advantages of a double-gate knife valve?

Double-gate valves provide faster operation, reduced stroke travel and improved process efficiency compared to conventional knife gate valves.

Is the DS Series suitable for pulp & paper applications?

Yes. The DS Series is specifically designed for pulp stock, residue discharge and paper manufacturing process systems.

Does the DS Series prevent media build-up?

Yes. The cavity-free body design reduces media accumulation and improves operational cleanliness.

Can the DS Series be automated?

Yes. The DS Series is available with pneumatic and automated actuation configurations.

What seat materials are available?

Available seat options include metal seated, PTFE and EPDM configurations.