Pressboard that holds clearance and compression for decades.
High-density transformerboard, precompressed pressboard, duct strips and machined components for oil-immersed transformers and high-voltage structures.
Flagship pressboard products
Board earns its place under compression.
In a clamped winding, pressboard spends its life under load, in hot oil, at high field stress. Density, compressibility and moisture decide whether clearances and clamping force survive the years — not the price per sheet.
Choose by service condition
Click any product to view its applications, material data and quotation checklist on this page.
G4 Transformerboard (High Density)
High-density precompressed transformerboard for structural insulation in oil-immersed transformers — barriers, clamping parts and spacers.
View specificationsPressboard PSP 3050
Pressboard supplied against the PSP 3050 grade call-out for transformer and high-voltage applications.
View specificationsLadder Duct Strip
Pre-assembled ladder duct strips forming axial oil ducts inside windings, with consistent spacing for winding-line use.
View specificationsPressboard Spacers & Strips
Plain and profiled spacers, sticks and strips cut from transformerboard for winding supports and clearance control.
View specificationsMolded & Machined Pressboard Parts
Cylinders, angle rings, caps and machined shapes formed or cut from pressboard to the assembly drawing.
View specificationsCustom Pressboard Components
One drawing-led workflow from board selection through machining, drying and export packing for complete pressboard kits.
View specificationsA safer path from requirement to quotation
- 01Define assembly function
- 02Select candidate material
- 03Review form, fit and processing
- 04Agree inspection evidence
Buyer questions, answered precisely
Pressboard vs Presspaper: Where the Line Sits
Same pulp family, different job — the dividing line is structural load, not thickness alone.
ReadSpecifying Transformerboard: Density, Thickness, Moisture
Three parameters decide whether your clearances survive clamping, drying and years in oil.
ReadWhy Ladder Duct Strips Matter in Winding Cooling
The duct geometry you wind in is the cooling you get out.
ReadPressboard Machining & RFQ Checklist
Board machining has its own rules — put them in the RFQ before the first cut.
ReadSend the drawing.
Define the duty.
Tell us the material, form, dimensions, quantity, operating temperature, destination and inspection requirements. We will review the application before quotation.