Laminated Wood Pressure Ring

This pressure ring is widely used as insulation materials in transformers.

Application:

This pressure ring is widely used as insulation materials in transformers.

Characteristic:

Each ring custom manufactured to ID, OD, and thickness

Higher strength permits optimized balance of ring thickness and design margin

No.	Index Name		Unit	Index
No.	Thickness		mm	≤1.6	>1.6-3.0	>3.0-6.0
1	Thickness Deviation		%	±7.5	±5.0	±5.0
2	Performance Density		g/cm³	1.0-1.2	1.1-1.12	1.15-1.3
3	Tensile Strength(Portrait)		MPa	≥100	≥105	≥110
4	Tensile Strength(Transverse)		MPa	≥75	≥80	≥85
5	Elongation	Portrait	%	≥3.0	≥3.0	≥3.0
5	Elongation	Transverse	%	≥4.0	≥4.0	≥4.0
6	Compressibility		%	≤10.0	≤7.5	≤5.0
7	Shrinkage	Portrait	%	≤0.5	≤0.5	≤0.5
		Transverse		≤0.7	≤0.7	≤0.7
		Thickness Direction		≤0.5	≤0.5	≤0.5
8	Interlaminar Bonding			Check whether one or more layers of stripping surface rupture obviously rough or scared
9	Water Content		%	≤6.0	≤6.0	≤6.0
10	Ash Content		%	≤1.0	≤1.0	≤1.0
11	Water Extraction Conductivity		Ms/m	≤5.0	≤6.0	≤8.0
12	Ph Of Aqueous Extract			6.0-9.0	6.0-9.0	6.0-9.0
13	Oil Absorption		%	≥11.0	≥9.0	≥7.0