DFT11 G MMA Piece
Devinsan offers specialized flange adapter solutions engineered for high-integrity, wide-tolerance connection between plain-ended pipes and flanged system components. Designed for rapid field assembly and enduring joint reliability, these DFT11 G MMA Piece units utilize a robust mechanical seal to meet the critical demands of modern municipal water 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 DFT11 G MMA 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 DFT11 G MMA Piece ensures precise fluid control, maintains excellent sealing integrity, and supports efficient, safe operation even under demanding conditions.
The DFT11 G MMA Piece is a high-performance flange adapter specifically engineered to provide a secure, permanent, and tight seal between a standard flange (e.g., valve, pump) and a plain-ended pipe of the same or differing nominal size and material. 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 DFT11 G MMA Piece is its robust, multi-segment flange end and wide-tolerance sealing gasket system. This design allows the adapter to accommodate significant variations in the outer diameter (O.D.) of the pipe being joined, making it ideal for connecting new flanged equipment to old cast iron, PVC, or ductile iron piping. The mechanism exerts uniform compression onto the pipe surface, guaranteeing a leak-free mechanical seal under high system pressure.
Manufactured from high-strength, corrosion-resistant materials (such as ductile iron and stainless steel fasteners) and built with a sectional body, the DFT11 G MMA Piece is designed to withstand continuous system pressure and harsh burial environments. Its simple bolt-and-lug design simplifies field assembly, allowing utility crews to establish a flanged connection quickly, which is critical during emergency line repairs or system upgrades.
The DFT11 G MMA Piece is ideally suited for applications connecting mainline valves, pump manifolds, flow meters, and any scenario requiring a permanent, versatile flanged joint to be created on a non-flanged pipe. 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 DFT11 G MMA Piece offers an optimal combination of universal pipe compatibility, structural joint strength, and unparalleled installation ease for flanged component integration. With its multi-material adaptability, robust mechanical seal, 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 DFT11 G MMA Piece is designed for the connection of plain-ended pipes to flanged components, 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 heavy component lifting.
Wear appropriate personal protective equipment (PPE).
Confirm that the pipeline section is fully depressurized and drained before attempting to install the DFT11 G MMA Piece.
3. Pre-Installation Checklist
Inspect the DFT11 G MMA Piece for any visible damage during transport or storage, paying attention to the flange face and rubber gasket condition.
Check that the adapter 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 end is properly prepared, and the pipe exterior surface is clean where the adapter will seat.
Ensure all necessary bolts, washers, and the required flange gasket are available.
4. Installation Procedure
Positioning: Slide the DFT11 G MMA Piece onto the pipe end.
Clean the exterior surface of the pipe end thoroughly to ensure optimal gasket sealing.
Align the adapter precisely over the pipe end. 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 mechanical seal on the pipe.
Connect the mating flanged component (e.g., valve) to the flange face of the DFT11 G MMA Piece using a separate gasket and bolts, ensuring precise alignment.
5. Post-Installation
Slowly reintroduce fluid and pressurize the system, checking immediately for leaks around both the mechanical coupling and the final flanged joint.
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 DFT11 G MMA 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 DFT11 G MMA 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 adapter 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 DFT11 G MMA 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 adapter should be replaced if the metal components 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 DFT11 G MMA Piece should be kept clean before burial.
After excavation, clean the adapter 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 DFT11 G MMA 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 DFT11?
What are the main advantages of this valve?
The DFT11 G MMA Piece offers flexible connection between non-flanged pipes and flanged components, accommodating pipes of differing materials and O.D.s, which is critical for system repair and integration flexibility.
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 "MMA" stand for in the DFT11 G MMA Piece designation?
“MMA” stands for Multi-Material Adapter, highlighting the key feature: its ability to securely and permanently anchor a flange face onto plain-ended pipes made from dissimilar materials (e.g., steel to ductile iron).
Can the DFT11 G MMA Piece absorb lateral movement or deflection?
Yes. The flexibility of the sealing sleeve allows the DFT11 G MMA Piece to safely accommodate minor angular misalignment and small amounts of lateral movement without compromising its pressure integrity.
Does the DFT11 G MMA Piece eliminate the need for concrete thrust blocks?
No. Like most mechanical couplings, the DFT11 G MMA Piece provides a pressure seal but does not offer full restraint against axial forces; thrust blocks or external restraints are still required for applications under high pressure, especially near bends.
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