Transformer Oil Duct Strip with DDP Paper | Diamond Dot Insulating Spacer Band for Oil-Immersed Transformers - STK
STK's Transformer Oil Duct Strip with DDP Paper is a premium, structurally reinforced insulation assembly engineered exclusively for oil-immersed power transformers. It is created by precisely mounting a series of heavy-duty insulating pressboard or laminated wood strips onto a base of high-purity Diamond Dot Paper (DDP) at perfectly calibrated intervals.
This specialized matrix acts as the permanent cooling highway inside a transformer. It creates uniform, uncollapsible channels that allow cooling insulation oil to flush away heat freely, while the thermal-curable epoxy diamond dots on the base paper weld tightly to the copper windings under oven heat, locking the entire coil structure into a rock-solid, vibration-proof block.
Product Features
High Mechanical Strength
The rigid pressboard strip provides excellent structural support, maintaining winding spacing and preventing deformation under transformer clamping pressure.
Stable Oil Flow Channels
Precisely bonded duct strips create uniform cooling channels, improving transformer oil circulation and heat dissipation efficiency.
Excellent Dielectric Performance
Manufactured from high-purity electrical insulation materials with outstanding dielectric strength and compatibility with transformer insulating oil.
Low Compression & Dimensional Stability
Maintains accurate dimensions even under long-term mechanical loading, ensuring reliable transformer operation.
Optimized for Transformer Manufacturing
The DDP layer bonds securely during coil drying, improving winding stability and simplifying transformer assembly.
Product Applications
Oil-Immersed Power Transformers:
Creating uniform vertical and horizontal cooling channels between low-voltage and high-voltage coil layers.
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Distribution Transformers:
Serving as structural axial spacers to keep winding groupings aligned and perfectly isolated from the steel core.
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Large Instrument Transformers:
Providing durable mechanical cushioning and oil-circulation clearance inside heavy substation monitoring units.
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Heavy Duty Reactor Coils:
Wrapping and locking high-current industrial magnetic induction coils that experience brutal electromagnetic shaking forces.
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STK Precision Custom Manufacturing
Custom Geometric Sizing:
We customize the exact thickness of the spacer strips (e.g., 2mm, 3mm, 5mm), the width of individual strips, and the customized open space (pitch interval) between each strip according to your CAD drawings.
01
Continuous Roll or Sheet Deliveries:
We can deliver the material in massive continuous rolls wrapped tightly around protective cores, or pre-cut sheets tailored for instant manual drop-in assembly on your workshop floor.
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Moisture-Locked Wholesale Shipping:
Electrical paper must stay bone-dry. Every B2B wholesale shipment is wrapped inside heavy-duty, multi-layer moisture-proof plastic barriers and vacuum-sealed to prevent air humidity contamination during transit.
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