DGV15 Knife Gate Valve
Devinsan offers robust, zero-clog isolation solutions engineered for reliable performance in highly abrasive slurry and wastewater applications. Designed for maximum service life, these specialized knife gate valve units combine powerful shearing capability with rugged ductile valve construction to meet the severe demands of modern process infrastructure
Production Standard
Nominal Dimension (DN)
Nominal Pressure (PN)
Operating Temperature
Face to Face
Connection
Coating
Testing
DN 50 – DN 400
PN 6-PN 10-PN 16
-30° / +200°
EN 558 Series 20
EN 1092-2 ISO7005-2
Electrostatic Powder Epoxy
EN 12266-1
Operation Versions
The DGV15 Knife Gate Valve can be operated with a range of compatible accessories to suit different installation and automation requirements:
1. DVA10 Surface Box & Extension Spindle
2. DVA11 Telescopic Extension Spindle
3. DVA12 Electric Actuators
4. DVA13 Pneumatic Actuators
5. DVA14 Gear Box
6. DVA15 HandWheel
These accessories allow the valve to be adapted for manual, geared, pneumatic, or electric operation, ensuring precise control and reliable performance in both industrial and commercial systems.
Application Areas
The DGV15 Knife Gate Valve is widely used across diverse industrial and commercial sectors, delivering reliable flow control and long‑lasting performance.
1. Water and Wastewater Systems
2. Chemical Industry
3. Food and Beverage Industry
4. Pharmaceutical Industry
5. Oil and Gas Industry
6. HVAC (Heating, Ventilation, Air Conditioning) Systems
In these applications, this Knife Gate Valve ensures precise fluid control, maintains excellent sealing integrity, and supports efficient, safe operation even under demanding conditions.
The DGV15 Knife Gate Valve is a specialized isolation component engineered for precise and dependable control of challenging fluids like slurries and viscous media. Designed for heavy industrial valve applications, this knife gate valve delivers exceptional media isolation and long-term durability in sectors like mining, chemical processing, and wastewater treatment.
At the heart of the DGV15 Knife Gate Valve is its precision-ground, sharp gate which travels vertically through the body. This design ensures the gate effectively slices through suspended solids, providing a reliable, tight shut-off. This powerful shearing action guarantees complete flow isolation when the valve is closed, significantly improving safety and efficiency in critical flow networks.
Constructed from a corrosion-resistant, high-strength ductile valve body, this assembly is built to withstand the abrasive nature of the media it handles. Its compact, wafer-style dimensions allow for rapid installation between flanges. Minimal contact between the gate and body during movement reduces wear, contributing to lower downtime and reduced operational costs.
The DGV15 Knife Gate Valve is ideally suited for controlling dry bulk handling, thick sludges, and abrasive slurries—environments where traditional valves often fail due to clogging. The rugged ductile valve construction makes this industrial valve a preferred choice for engineers seeking a reliable solution for long-term uninterrupted process flow.
In summary, the DGV15 Knife Gate Valve offers an optimized blend of media-cutting power, sealing efficiency, and robust construction. With its specialized gate system, durable ductile valve components, and ease of maintenance, it stands as a trusted, high-integrity knife gate valve solution for severe fluid control applications worldwide.
1. General Information
The DGV15 Knife Gate Valve is specifically engineered for on/off control within challenging industrial lines containing solids. Proper installation, with careful attention to alignment and flange seating, is essential to ensure the safe operation, long service life, and reliable, leak-free performance of this robust industrial valve.
2. Safety Precautions
Installation must be performed exclusively by certified and experienced personnel.
Ensure strict adherence to all site-specific safety protocols and regulations concerning heavy lifting and pipeline interventions.
Always use appropriate Personal Protective Equipment (PPE), including cut-resistant gloves and safety glasses, given the nature of the knife gate valve.
CRITICAL: Confirm that the process line is fully depressurized, purged, and drained of hazardous media before attempting to handle or install the valve.
3. Pre-Installation Checklist
Thoroughly inspect the DGV15 Knife Gate Valve for any damage from shipping or storage; verify the condition of the gate’s cutting edge.
Confirm that the valve’s size, pressure class, and flange drilling (e.g., DIN/ANSI) match the system specifications.
Clean the valve interior and ensure the pipeline flanges are free of caked media or debris that could damage the sealing surfaces upon closing.
Verify that the adjacent pipeline flanges are perfectly parallel and aligned to prevent stress on the ductile valve body.
Ensure adequate clearance is provided above the valve for the full retraction and operation of the actuator/handwheel.
4. Installation Procedure
Positioning: Install the knife gate valve in a partially open position to protect the seals during mounting. Note that the valve typically has a preferred flow direction, indicated by the body markings, especially for slurry applications.
Pipeline Preparation: Use new, high-quality flange gaskets suitable for the fluid’s abrasion and temperature. Do not rely on old or damaged gaskets.
Mounting the Valve: Carefully position the valve between the flanges. Insert all bolts and tighten them in a diagonal, cross-pattern sequence, applying torque incrementally until the specified final value is reached. Avoid uneven or excessive force on the industrial valve.
Operational Check: Prior to full system pressurization, slowly cycle the gate completely open and closed via the actuator to confirm smooth, unhindered travel and proper seating.
5. Post-Installation
Slowly and carefully introduce the process medium to the system and immediately check for any external leaks around the bonnet, flange connections, or packing gland of the ductile valve.
If leakage is detected, depressurize the line and recheck bolt torque or gasket alignment.
Document all installation torque values, dates, and personnel responsible for the permanent system records.
Proper maintenance extends the service life of the DGV15 Knife Gate Valve and ensures reliable performance, especially when managing abrasive slurries and high-solids media. Follow the guidelines below to maximize the lifespan of this vital industrial valve:
1. Routine Operation
Cycle the knife gate valve (open/close) periodically—even in continuous flow applications—to dislodge any media buildup that could impede the gate’s movement or affect the seal.
The valve must be operated only for full ON/OFF isolation. Never use this ductile valve for flow regulation unless the design explicitly specifies throttling capability.
2. Inspection Schedule
Monthly: Conduct external visual checks for signs of “washout” (erosion) near the gate and seals, which is common with high-velocity, abrasive slurries. Also check for external leakage at the packing area.
Quarterly: Fully operate the knife gate valve through its entire stroke to verify smooth travel and effective media shearing action.
Annually: Perform a detailed inspection of the gate’s cutting edge, the seat seal integrity, and the condition of the exposed stem/actuator assembly.
3. Lubrication
If the valve utilizes a gearbox or external mechanism, adhere strictly to the manufacturer’s lubrication schedule using the recommended grease type.
Ensure the exposed parts of the stem and actuator of the industrial valve remain clean and free of the abrasive process media to prevent premature wear.
4. Seal and Gasket Replacement
Replace the stem packing, seats, and flange gaskets immediately upon observing any persistent external or seat leakage.
CRITICAL: Before any maintenance involving seals, depressurize, isolate, and thoroughly flush/drain the pipeline to remove residual hazardous media.
To ensure the reliability of the ductile valve, only use Genuine Devinsan spare parts designed for the specific knife gate valve model.
5. Cleaning
Keep the exterior surfaces of the industrial valve clean to prevent external corrosion accelerated by splashed process chemicals or environmental factors.
For systems prone to crystallization or hardening media, implement a scheduled flushing procedure before full closure to ensure the valve cavity is clear.
6. Storage and Spare Parts
Maintain a secure inventory of critical wear parts (packing, secondary seals) in a dry, dark, and clean location, away from heat sources.
Keep an accurate log of all operational cycles, inspections, maintenance, and parts replacements performed on the knife gate valve.
We prioritize quality at every stage of production to deliver durable, safe, and efficient products. Our continuous improvement and strict quality controls keep us at the forefront of the industry.
Our certifications prove our commitment to excellence and compliance with international standards, ensuring the safety and reliability of our products worldwide.
We continuously invest in innovation and quality to expand our certifications and meet evolving industry needs.
Frequently Asked Questions about the DGV15?
What are the main advantages of this valve?
The DGV15 Knife Gate Valve offers superior isolation capability in media containing high concentrations of solids, slurries, or powder. Its robust, ductile valve construction and shearing gate action provide reliable, tight shut-off, making it a critical industrial valve for challenging process applications.
Why should I choose this product?
This knife gate valve delivers outstanding performance in handling abrasive and thick media, making it a dependable choice for demanding slurry transport or wastewater systems. Its high-quality materials and design ensure reliable, low-maintenance operation over time, reducing costs associated with blockages and downtime.
What is the key benefit of the ductile valve construction in the DGV15 Knife Gate Valve?
The ductile valve construction provides exceptional mechanical strength and fracture resistance compared to traditional cast iron, making the DGV15 Knife Gate Valve highly durable against pipeline stresses and impact damage typical in harsh industrial valve environments.
Can this DGV15 Knife Gate Valve be used for dry bulk materials?
Yes. The DGV15 Knife Gate Valve is excellent for applications involving the isolation of dry powders, pellets, and granules in gravity feed or pneumatic conveying systems, utilizing the gate’s power to shear through the material column effectively.
How is the packing gland adjusted to prevent stem leakage?
The packing gland on this industrial valve can be carefully tightened to compensate for minor wear and prevent stem leakage. However, excessive tightening should be avoided as it can increase the operating torque required for the knife gate valve. If leakage persists, the packing should be replaced immediately.
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