DCV12 Swing Check Valve With Lever
Devinsan offers specialized flow control solutions engineered for superior backflow prevention and adjustable closing dynamics in high-volume systems. Designed for precise surge control and extended component life, these DCV12 Swing Check Valve with Lever units combine robust construction with external lever-and-weight mechanisms to meet the critical demands of modern pump station protection.
Production Standard
Nominal Dimension (DN)
Nominal Pressure (PN)
Operating Temperature
Design
Face to Face
Connection
Coating
Testing
DN 40 – DN 300
PN 6-PN 10-PN 16-PN 25-PN 40
-30° / +200°
EN 12334 – EN 16767
EN 558 Series 48 – DIN 3202 F6
EN 1092-2 ISO7005-2 Flanged
Electrostatic Powder Epoxy
EN 12266-1
Application Areas
The DCV12 Swing Check Valve With Lever 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 type DCV12 Swing Check Valve With Lever ensures precise fluid control, maintains excellent sealing integrity, and supports efficient, safe operation even under demanding conditions.
The DCV12 Swing Check Valve with Lever is a heavy-duty, non-return valve engineered specifically to mitigate severe water hammer and optimize closing speed in large-scale municipal and industrial pumping applications. Designed to meet the stringent demands of modern infrastructure, this valve delivers controlled operational closing, exceptional reliability, and long-term durability in high-pressure environments.
At the core of the DCV12 Swing Check Valve with Lever is its traditional swinging disc mechanism complemented by an external lever and weight or spring attachment. This external assembly allows precise adjustment of the disc’s closing speed and counteracts inertial forces. The disc swings freely out of the flow path during normal forward flow, minimizing pressure loss. This unique control system ensures a rapid yet soft closure upon flow reversal, minimizing disruptive pipeline surges.
Manufactured from high-strength, corrosion-resistant materials and built with a robust ductile iron body, the DCV12 Swing Check Valve with Lever is designed to withstand continuous high flow rates and challenging fluid environments. Its flanged design allows for secure installation into horizontal or vertical pipelines. The externally adjustable mechanism simplifies fine-tuning the valve’s response in the field, optimizing its effectiveness at preventing destructive water hammer across varying pump cycles.
The DCV12 Swing Check Valve with Lever is ideally suited for applications in large pump discharge lines, high-head water transport networks, and sewage lift stations where precise control over closing dynamics is essential for pipeline longevity. Its combination of a full-bore, low-head-loss design and the external hydraulic adjustment feature makes it a superior choice for engineers seeking a high-integrity solution for dynamic pipeline protection.
In summary, the DCV12 Swing Check Valve with Lever offers an optimal combination of hydraulic efficiency, customizable surge control, and reliable performance. With its full-bore passage, durable construction, and externally controlled swinging disc mechanism, this unit stands as a trusted solution for modern fluid control and pipeline protection requirements worldwide.
1. General Information
The DCV12 Swing Check Valve with Lever is designed for use in pumping stations and distribution networks, requiring reliable backflow prevention with external control over the closing rate. Proper installation is essential to guarantee safe operation, long service life, and efficient, 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 heavy equipment handling, including securing the external weight/lever assembly.
Wear appropriate personal protective equipment (PPE).
Confirm that the pipeline section is fully depressurized and drained before attempting to install the DCV12 Swing Check Valve with Lever.
3. Pre-Installation Checklist
Inspect the DCV12 Swing Check Valve with Lever for any visible damage during transport or storage, paying particular attention to the external lever arm and hinge assembly.
Check that the valve type, size, and pressure rating match the system requirements.
Verify that the valve interior is clean and free from debris that could interfere with disc seating.
Confirm that the mating pipeline flanges are properly aligned (parallel and concentric) and free from burrs or sharp edges. Ensure sufficient overhead and lateral space is available for the full swing of the lever arm and the counterweight (if applicable).
4. Installation Procedure
Positioning: Install the DCV12 Swing Check Valve with Lever ensuring the flow direction matches the arrow cast on the valve body. The hinge pin must be positioned horizontally and the lever assembly oriented correctly for the required operation.
Use the appropriate gaskets suitable for the medium and operating conditions.
Align the valve precisely with the pipeline flanges and insert bolts, tightening them gradually and crosswise in incremental steps. This ensures even compression of the gasket and prevents stress on the valve body.
5. Post-Installation
Slowly pressurize the system after installation and check for leaks around the flange connections and the bonnet/inspection cover gasket. 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 DCV12 Swing Check Valve with Lever and ensures reliable backflow prevention and surge control. Follow the guidelines below to maximize the longevity of this essential unit.
1. Routine Operation
Visually inspect the DCV12 Swing Check Valve with Lever exterior weekly during initial commissioning to ensure the disc operates smoothly and the external lever movement is unhindered. Ensure that the counterweight position (if adjustable) remains secured and that there is no debris obstructing its movement.
2. Inspection Schedule
Monthly, check the valve exterior for external leaks around the body, inspection cover, and flange connections, as well as the external lever shaft.
Quarterly, check the tightness of all external bolts, including the packing gland bolts on the external shaft, and observe the valve closure during a pump stop.
Annually, perform a detailed internal inspection by removing the bonnet/inspection cover to check the hinge pins, disc alignment, and seating surface condition.
3. Lubrication
The external lever shaft packing gland may require periodic adjustment or re-packing to prevent leakage. Consult the manufacturer’s technical manual for specific lubrication requirements, if any, for the external bearings or hinge pins.
4. Seal and Gasket Replacement
Replace the bonnet/inspection cover gasket and external shaft O-rings immediately if external leakage is observed. The internal disc seal or seat should only be replaced if consistent internal leakage (backflow) is detected after a pump shut-off test. Always depressurize and drain the pipeline thoroughly before attempting any internal maintenance work.
5. Cleaning
Keep the exterior of the DCV12 Swing Check Valve with Lever clean to prevent surface corrosion, especially on the exposed lever mechanism and counterweight. Ensure that the internal flow path remains clear of large debris that could impede the disc’s ability to swing open fully or close tightly.
6. Storage and Spare Parts
Store spare parts (gaskets, seals, counterweight components) in a dry, clean, and cool environment, away from direct sunlight and harsh chemicals. Maintain a detailed record of all inspections, internal part replacements, and repairs performed on the DCV12 Swing Check Valve with Lever 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 DCV12?
What are the main advantages of this valve?
The DCV12 Swing Check Valve with Lever offers the unique advantage of externally controlling the disc’s closing speed via the lever and weight (or spring), allowing precise tuning to minimize pressure transients (water hammer) in the pumping system.
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.
How does the lever and weight system function?
The external lever-and-weight system provides a dynamic counter-force that influences the disc closure time. By adjusting the weight’s position, the closing speed can be fine-tuned to ensure the disc seats gently just at the point of flow reversal, significantly reducing water hammer.
Can the DCV12 Swing Check Valve with Lever be installed vertically?
Installation in vertical lines with upward flow is generally possible. However, the external lever and weight system must be specifically calibrated and configured for vertical operation to ensure the gravity assist functions correctly, often requiring manufacturer guidance.
What is the benefit of external adjustment for the DCV12 Swing Check Valve with Lever?
The benefit is the ability to adjust the valve’s closing performance after installation and commissioning based on real-world pump system dynamics, ensuring optimal mitigation of damaging pressure surges throughout the pipeline network.
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