DFT10 G MMB Piece
Devinsan offers versatile coupling solutions engineered for reliable, wide-tolerance jointing and leak-free connection of pipelines using dissimilar materials or varying outer diameters. Designed for quick field assembly and enduring structural alignment, these DFT10 G MMB Piece units utilize a robust mechanical seal to meet the critical demands of modern municipal and industrial network integration.
Production Standard
Nominal Dimension (DN)
Nominal Pressure (PN)
Operating Temperature
Coating
Testing
DN 50 – DN 400
PN 6-PN 10-PN 16-PN 25-PN 40
-30° / +200°
Electrostatic Powder Epoxy
EN 12266-1
Application Areas
The DFT10 G MMB Piece 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 DFT10 G MMB Piece ensures precise fluid control, maintains excellent sealing integrity, and supports efficient, safe operation even under demanding conditions.
The DFT10 G MMB Piece is a high-performance universal coupling specifically engineered to provide a secure, permanent, and tight seal between two non-flanged pipe ends of the same or differing nominal sizes and materials. Designed to meet the stringent demands of modern infrastructure, this specialized fitting ensures rapid field installation, superior joint integrity, and long-term durability in complex water distribution and repair scenarios.
At the core of the DFT10 G MMB Piece is its robust, multi-band segmented sleeve and wide-tolerance sealing gasket system. This design allows the coupling to accommodate significant variations in outer diameter (O.D.) between the pipes being joined, making it ideal for connecting old cast iron to new ductile iron or plastic pipes. The mechanism exerts uniform pressure onto the pipe surface, guaranteeing a leak-free mechanical seal under system pressure.
Manufactured from high-strength, corrosion-resistant materials (such as ductile iron and stainless steel bolts) and built with a sectional body, the DFT10 G MMB Piece is designed to withstand continuous system pressure and harsh burial environments. Its simple bolt-and-lug design simplifies field assembly, requiring minimal training and common tools. The inherent flexibility of the coupling allows for minor angular deflection and movement, reducing stress on the piping system.
The DFT10 G MMB Piece is ideally suited for applications in municipal pipeline repair, emergency leak fixes, connection to metering stations, and any scenario requiring a permanent, versatile joint between non-standard pipe types. Its wide-range adaptability and dependable sealing make it a preferred choice for engineers seeking a high-integrity, standards-compliant solution for long-term network expansion and maintenance.
In summary, the DFT10 G MMB Piece offers an optimal combination of pipe compatibility, structural joint strength, and unparalleled installation ease. With its multi-material adaptability, robust sealing mechanics, and focus on field versatility, this unit stands as a trusted solution for modern fluid control and complex pipeline integration requirements worldwide.
1. General Information
The DFT10 G MMB Piece is designed for joining plain-ended pipes (without flanges), requiring minimal pipe preparation. 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 working with pressurized pipelines and excavation safety.
Wear appropriate personal protective equipment (PPE).
Confirm that the pipeline section is fully depressurized and drained before attempting to install the DFT10 G MMB Piece.
3. Pre-Installation Checklist
Inspect the DFT10 G MMB Piece for any visible damage during transport or storage, paying attention to the coupling bands and rubber gasket condition.
Check that the coupling size and pressure rating match the system requirements.
Verify that the interior and gasket seating area are clean and free from debris.
Confirm that the mating pipe ends are properly aligned and that the pipe exterior surfaces are clean where the coupling will seat.
Ensure all necessary bolts and washers are available.
4. Installation Procedure
Positioning: Slide the open DFT10 G MMB Piece coupling bands onto one of the pipe ends.
Clean the exterior surfaces of both pipe ends thoroughly to ensure optimal gasket sealing.
Insert the second pipe end into the coupling, ensuring the ends are separated by the internal stop (if present) and that the coupling is centred over the joint.
Insert the bolts and tighten them sequentially and evenly in a cross-pattern to the manufacturer’s specified torque.
This uniform tightening compresses the gasket, creating the final seal.
5. Post-Installation
Slowly reintroduce fluid and pressurize the system, checking immediately for leaks around the circumference of the coupling.
If leakage is detected, depressurize the system immediately and verify the pipe alignment and re-tighten the bolts following the cross-pattern sequence.
Record the installation details, pipe types joined, and final bolt torques for documentation purposes.
Proper maintenance extends the service life of the DFT10 G MMB Piece and ensures reliable joint integrity and sealing performance. Follow the guidelines below to maximize the longevity of this essential unit.
1. Routine Operation
Visually inspect the DFT10 G MMB Piece area regularly (e.g., annually) for signs of external leakage, soil erosion around the joint, or movement of the piping.
Monitor the surrounding environment for any chemical spills or corrosive agents that could degrade the rubber gasket material.
2. Inspection Schedule
Monthly, check the visible bolts for signs of loosening or severe corrosion.
Quarterly, check the ground surface above the buried coupling for signs of heaving or settling, which may indicate pipe movement or inadequate support.
Annually, perform a detailed inspection by excavating the joint (if buried) to check the gasket for deterioration and the bolts/bands for corrosion.
3. Lubrication
The DFT10 G MMB Piece is a mechanical coupling and requires no lubrication after installation.
The rubber gasket should be kept clean during storage and installation to ensure proper seating.
4. Seal and Gasket Replacement
The sealing gasket should be replaced if external leakage is observed that cannot be stopped by re-tightening the bolts to the specified torque.
The entire DFT10 G MMB Piece should be replaced if the metal bands or lugs show significant corrosion or structural deformation.
Always isolate and fully depressurize the pipeline section before attempting to disassemble the coupling.
5. Cleaning
The exterior of the DFT10 G MMB Piece should be kept clean before burial.
After excavation, clean the coupling and inspect the coating integrity before reburial.
6. Storage and Spare Parts
Store spare parts (gaskets, bolts, coupling bands) in a dry, clean, and cool environment, away from direct sunlight, ozone, and temperature extremes, which can degrade the rubber.
Maintain a detailed record of all inspections, bolt torque checks, and repairs performed on the DFT10 G MMB Piece 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 DFT10?
What are the main advantages of this valve?
The DFT10 G MMB Piece offers unmatched flexibility by joining pipes with different materials (e.g., steel to PVC) and large differences in outer diameter, making it indispensable for complex pipeline repairs and network integration.
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 does "MMB" stand for in the DFT10 G MMB Piece designation?
“MMB” stands for Multi-Material/Multi-Band, referring to the coupling’s key feature: its ability to securely join pipes made of different materials and varying outside diameters using its robust, adjustable band system.
Can the DFT10 G MMB Piece handle minor angular misalignment?
Yes. The segmented design and the flexibility of the rubber sealing element allow the DFT10 G MMB Piece to safely accommodate minor angular misalignment and deflection between the two pipe ends without compromising its pressure integrity.
Is the DFT10 G MMB Piece considered a fully restrained joint?
The DFT10 G MMB Piece typically provides an unrestrained seal. For applications requiring full restraint against axial pipe pull-out (e.g., on bends or in poor soil), separate thrust blocks or external restraining mechanisms are generally required.
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