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Bursting strength tester of any material such as fabric, leather, paper, paper board & corrugated box etc. Its strength under multi- directional force and is defined, as the hydrostatic pressure required producing rapture of the material when pressure is applied at a controlled increasing rate through a rubber diaphragm.
Bursting Strength Tester is designed to find bursting strength of fabric/leather/ paper/paper board & corrugated box. A test specimen is held between two annular clamps under sufficient pressure to minimize slippage. The clamping is done by hand wheel/screw arrangement or by pneumatic pressure with pressure gauge, solenoid valve and pressure regulator as per model. The upper clamping surface which is in contact with the test specimens has a continuous spiral grooves. A circular diaphragm of pure gum rubber is clamped between the lower clamping plate & pressure cylinder so that before the diaphragm is stretched by pressure underneath it the center of its upper surface is below the plane of the clamping surface.
The equipment is fitted with a motor driven screw mechanism, which increases fluid displacement on the lower side of the diaphragm at a specified rate. The equipment is fitted with an arrangement, which automatically brings down the pressure and stops the motor on completion of the test cycle. A maximum reading type pressure gauge (or pressure sensor and digital indicator with peak hold and tare facility in digital model) gives the bursting pressure.
Capacity : 0 to 7kg/cm2, 0.2 kg/cm2 least count &
0 to 40 kg/cm2, 1 kg/cm2 least count
Opening in upper clamp : 30.5 mm diameter
Opening in lower clamp : 38.1 mm diameter
Rate of fluid displacement : 95 cc/ minute
Test fluid : Glycerin
Gear Box : Worm reduction type
Power required : 220 VAC, 500 W, 50 Hz single phase
BS 3424/3137, ASTM D 3786/ASTM D 774, ISO 2758/2559/3303/3669 standards
ASTM D 774 / D774M-96a Paper, T 810 om-92 (Corrugated & Solid Fiberboard)
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