DBV12 Lug Type Butterfly Valve
Devinsan offers durable, leak-free shut-off solutions engineered for reliable performance in water supply, wastewater treatment, and fire protection networks. Designed for long service life, these valves combine robust construction with precise flow control to meet the demands of modern infrastructure.
Production Standard
Nominal Dimension (DN)
Nominal Pressure (PN)
Operating Temperature
Design
Face to Face
Connection
Coating
Testing
DN 40 – DN 500
PN 6-PN 10-PN 16
-30° / +200°
EN 593
EN 558 Series 20
EN 1092-1 ISO7005-1 Lug Type
Electrostatic Powder Epoxy
EN 12266-1
Operation Versions
The DBV12 Lug Type Butterfly 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 DBV12 Lug Type Butterfly 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 DBV12 Lug Type Butterfly Valve ensures precise fluid control, maintains excellent sealing integrity, and supports efficient, safe operation even under demanding conditions.
The DBV12 Lug Type Butterfly Valve is a specialized isolation solution engineered for robust and dependable fluid control, allowing for secure isolation and easy maintenance in high-pressure applications. Designed to fulfill the requirements of modern infrastructure, this valve delivers exceptional sealing capability, operational reliability, and long-term durability, especially where downstream service is needed.
At the core of the DBV12 Lug Type Butterfly Valve is its lugged body design, featuring threaded bolt holes that allow the valve to be securely mounted to the pipeline using separate sets of bolts for each flange. This structure ensures positive alignment and allows the pipeline on one side of the valve to be removed while the other side remains pressurized. The resilient seat provides a bubble-tight closure against the disc, guaranteeing reliable isolation.
Manufactured from high-strength, corrosion-resistant materials and built with a robust ductile iron body, the DBV12 Lug Type Butterfly Valve is designed to withstand continuous heavy usage and challenging environments. The disc’s centralized position ensures low friction during opening and closing, which maintains the integrity of the resilient seat. This feature significantly reduces the long-term maintenance costs and minimizes the potential for unplanned downtime.
The DBV12 Lug Type Butterfly Valve is ideally suited for utility systems, industrial chemical processing, and municipal pump stations where line-end service or temporary pipeline isolation is essential. Its unique lugged configuration and proven sealing performance make it a crucial selection for engineers and project managers seeking a high-integrity, standards-compliant solution for systems requiring frequent or critical maintenance access.
In summary, the DBV12 Lug Type Butterfly Valve offers an optimal combination of performance, safety, and unique service advantages. With its durable lugged construction, effective sealing system, and capability for downstream isolation, this unit stands as a trusted solution for modern fluid control applications worldwide.
1. General Information
The DBV12 Lug Type Butterfly Valve is designed for secure mounting between pipeline flanges, ensuring highly reliable installation and enabling isolation for downstream maintenance. Proper installation is essential to guarantee safe operation, long service life, and sustained leak-free performance.
2. Safety Precautions
Installation must be performed by qualified personnel only.
Ensure strict compliance with all local safety regulations and standards concerning pipeline pressure and equipment handling.
Wear appropriate personal protective equipment (PPE).
Confirm that the pipeline is fully depressurized and drained before attempting to install the DBV12 Lug Type Butterfly Valve.
3. Pre-Installation Checklist
Inspect the DBV12 Lug Type Butterfly Valve for any visible damage during transport or storage.
Check that the valve type, size, and pressure rating match the system requirements.
Verify that the valve interior is clean and free from debris.
Confirm that the pipeline flange faces are properly aligned, parallel, and free from burrs or sharp edges that could damage the resilient seal. Ensure sufficient space is available for actuator operation and maintenance access.
4. Installation Procedure
Positioning: Install the DBV12 Lug Type Butterfly Valve by carefully centring it between the mating flanges with the disc in a partially open position (about 10°) to protect the seat during insertion.
Use a separate bolt set for each flange to secure the valve, utilizing the threaded lugs on the valve body.
Ensure the bolts are tightened gradually and crosswise in incremental steps to achieve even compression of the liner and prevent damage to the valve body.
Cycle the valve fully open and closed after mounting to confirm smooth operation before pressurizing.
5. Post-Installation
Slowly pressurize the system after installation and carefully check for leaks around the flange connections and the stem/shaft area.
If leakage is detected, depressurize the system immediately and re-tighten the bolts following the cross-pattern sequence.
Record the installation details, date, and final bolt torques for documentation purposes.
Proper maintenance extends the service life of the DBV12 Lug Type Butterfly Valve and ensures reliable performance. Follow the guidelines below to maximize the longevity of this essential unit.
1. Routine Operation
Operate the DBV12 Lug Type Butterfly Valve (open/close) periodically, at least quarterly, to prevent seizing and the buildup of deposits on the disc and sealing surfaces, maintaining optimal functionality.
Avoid using the valve for continuous throttling or modulation, as it is primarily designed for on/off isolation service.
2. Inspection Schedule
Monthly, check the valve exterior for external leaks around the body, stem packing, and flange connections.
Quarterly, fully operate the valve to verify smooth disc movement and full closure capability.
Annually, perform a detailed inspection of the resilient seat, stem seals, and body coating condition.
3. Lubrication
The DBV12 Lug Type Butterfly Valve is generally maintenance-free regarding lubrication.
However, if applicable (e.g., for gear operators), lubricate the gearbox according to the manufacturer’s specific recommendations.
Ensure all moving parts remain free of dirt and external corrosion.
4. Seal and Gasket Replacement
Replace the resilient liner, O-rings, or stem seals immediately if external leakage or visible wear is observed.
Always depressurize and drain the pipeline thoroughly before performing any maintenance work that requires seal replacement.
Only use original spare parts to guarantee perfect compatibility and long-term reliability.
5. Cleaning
Keep the exterior of the DBV12 Lug Type Butterfly Valve clean to prevent surface corrosion, which can be accelerated by environmental factors.
In mildly aggressive environments, consider applying additional protective coating or insulation around the body and flanges.
6. Storage and Spare Parts
Store spare parts (liners, seals, gaskets) in a dry, clean, and cool environment, away from direct sunlight and harsh chemicals.
Maintain a detailed record of all inspections, repairs, and replacements performed on the DBV12 Lug Type Butterfly Valve unit.
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 DBV12?
What are the main advantages of this valve?
The DBV12 Lug Type Butterfly Valve offers rapid quarter-turn operation, reliable shut-off, and the unique ability to isolate and remove the downstream line without affecting the pressurized upstream line. Its lugged design simplifies installation and maintenance.
Why should I choose this product?
This valve delivers outstanding performance in both sealing and durability, making it a dependable choice for demanding applications. Its straightforward design facilitates easy installation, offering flexibility during system design. With a wide range of material options, it meets the needs of various infrastructure projects, from municipal water networks to industrial facilities.
What is the benefit of the lugged body design?
The lugged body allows for secure anchoring of the valve between flanges and permits the removal of the pipeline on one side while the other remains fully pressurized, making the DBV12 Lug Type Butterfly Valve essential for critical isolation points.
How does the DBV12 compare to a wafer-style valve during maintenance?
Unlike wafer-style valves that require both flanges to be loosened for removal, the DBV12 Lug Type Butterfly Valve can be serviced or removed from the pipeline by simply unbolting the downstream flange, offering significant time savings.
Is the DBV12 Lug Type Butterfly Valve suitable for end-of-line service?
Yes. Due to its secure bolted connection via threaded lugs, the DBV12 Lug Type Butterfly Valve is perfectly suited for end-of-line installation as a final shut-off point, ensuring safety and complete isolation.
Contact Devinsan
Reach out to our team for inquiries, quotes, and technical assistance