In pipeline operations, the efficient detection of pigs or pig balls is vital for ensuring the smooth flow and maintenance of pipelines. The removable pig signaler with a Double Block and Bleed (DBB) valve is a revolutionary device designed to accurately detect pig passage while offering additional safety measures. This intrusive pig signaler is installed at specified intervals along the pipeline, providing critical information about pig movement. In this article, we will explore the features, advantages, and working principles of the removable pig signaler with a DBB valve and its significant impact on pipeline safety.
Importance of Removable Pig Signaler with DBB Valve:
The removable pig signaler with a DBB valve is a specialized device installed on pipelines to detect the passage of pigs or pig balls. Traditional pig signalers can face challenges when it comes to removal, potentially resulting in leakage and safety concerns. By utilizing a removable pig signaler with a DBB valve, operators can safely transport pigs while maintaining pipeline integrity and preventing leaks.
The removable pig signaler with a DBB valve offers several essential features and parameters:
– Type: Intrusive
– Installing Type: 2” Flange/2” Nipple welded (ASME B16.5, CLASS 150-1500)
– Insert Depth: 21mm
– Operating Temperature: -20~120℃ (customizable)
– NACE MR 0175: Yes
– Ingress Protection: IP66
– Explosion-proof Class: Exd II BT4
– DBB Valve: Included
– Removal Under Pressure: Yes (simple retriever provided)
– Trigger Type: Bi-directional
– Material: Internal part – 316LSS (customizable); Flange/Body – PTFE Coated A105N (customizable)
– Junction Box Material: Aluminum alloy/316SS
– Switch Type: DPDT/2*SPDT
– Switch Rating: DC24V 3A/DC24V 5A
– Retriever: Two full thread studs (special tool provided)
Advantages of DBB Valve:
The DBB valve integrated into the removable pig signaler offers several advantages:
– Dual Sealing: The DBB valve has two sealing valves that can be simultaneously sealed in the closed state, ensuring effective isolation.
– Leak Prevention: DBB valves prevent leaks, which can have severe consequences in high-pressure or high-temperature environments.
– Maintenance and Integrity Checks: DBB valves facilitate maintenance activities and integrity checks by monitoring potential leaks and ensuring the integrity of seat seals.
– Space and Cost Efficiency: DBB valves eliminate the need for complex multi-valve systems, saving space and reducing costs.
Advantages of Pig Signaler with DBB Valve:
The combination of a pig signaler with a DBB valve offers several advantages:
– DBB Valve Integration: The DBB valve’s advantages, such as effective sealing and leak prevention, are combined with the pig signaler’s functionality.
– Bi-directional Trigger: The bi-directional trigger enables reliable pig detection regardless of the pig’s launch direction or back direction, enhancing detection accuracy.
– Flange Connection: Unlike welded pig signalers, the flange-connected pig signaler offers flexibility in material selection and convenient removal, reducing costs and simplifying installation.
The pig signaler is installed inside the pipeline and contains a trigger that can be triggered in both directions. As a cleaning pig passes through the pipeline, the trigger is activated, pulling the connecting rod within the sealing bush. This action causes the flag to rotate 90 degrees, indicating the pig’s passage. The flag can be easily reset for future use by flipping it counterclockwise.
The DBB valve incorporated within the pig signaler operates as a double switch and release function valve. It is specifically designed for applications in aviation kerosene, light oil, natural gas, liquefied gas, chemical mediums, and other pipelines requiring a reliable medium cut-off device. The valve features an automatic discharge mechanism to prevent abnormal pressure build-up within the valve chamber, ensuring safe and effective operation. The valve switch indicator is synchronized with the switch position, providing real-time and accurate information about the valve’s status.
DBB Valve Overview:
The DBB valve is a single valve that incorporates two-seat surfaces. In the closed position, the cavity between the seat surfaces acts as a vent, providing a pressure seal at both ends of the valve.
When the valve is closed, the hand wheel is first rotated, followed by a 90° rotation of the cock and sealing sliding plate. The cock is then moved downward, pushing the sealing sliding plate against the inner cavity surface of the valve body. This even compression of the elastic sealing ring seals the upper and lower ends of the valve hole.
To open the valve, the hand wheel is rotated to lift the cock and retract the sealing sliding plate from the sealing surfaces on both sides of the valve body. Once the sliding plate is fully retracted and separated from the valve body’s sealing surface, the hand wheel is further rotated by 90° to position the cock and sealing sliding plate, putting the valve in the open position.
1. Frictionless Sealing: The valve design ensures no contact between the sealing surfaces of the valve body and the sliding plate, resulting in minimal friction and wear. This extends the valve’s service life and requires low opening and closing torque.
2. Convenient Maintenance: The valve can be maintained without removing it from the pipeline. Simply disassemble the valve bottom cover and replace the pair of sliding plates.
3. Cost-effective Design: The reduced diameter of the valve body and cock helps to minimize costs.
4. Hard Chromium Plating: The valve body’s inner cavity is plated with hard chromium, providing a durable and smooth sealing area.
5. Elastic Seal: The slide features an elastic seal made of fluoro rubber, molded into the groove on the slide’s surface. The elastic seal is backed by a fireproof metal-to-metal seal.
6. Automatic Relief Device (Optional): The valve is equipped with an optional automatic relief device, which prevents abnormal pressure buildup in the valve chamber after it is completely closed, while also facilitating valve testing.
The removable pig signaler with a DBB valve offers a significant advancement in pipeline safety and pig detection technology. By combining the functionality of a pig signaler with the advantages of a DBB valve, operators can achieve reliable and efficient pig tracking while ensuring the integrity of the pipeline system. The removable design facilitates the safe transportation of pigs and allows for convenient maintenance and integrity checks without the need for complex removal tools. With its bi-directional trigger, flange connection, and robust DBB valve, this innovative pig signaler enhances pipeline operations, reduces the risk of leaks, and ensures the smooth flow of fluids through the pipeline.
By investing in a removable pig signaler with a DBB valve, operators can optimize pig tracking processes, minimize downtime, and improve overall pipeline safety. The integration of advanced features, such as dual sealing, leak prevention, and synchronized valve indicators, guarantees reliable and accurate pig detection while prioritizing the security and integrity of the pipeline. Incorporating this cutting-edge technology in pipeline operations is a testament to the commitment to excellence and innovation in the industry.
Choose the removable pig signaler with a DBB valve to enhance pig tracking efficiency, streamline maintenance activities, and ensure the smooth and safe operation of your pipeline network. Experience the benefits of advanced technology and elevate your pipeline operations to new heights of efficiency and reliability.