Testing Machines

Bursting strength tester of any material such as fabric, leather, paper, paper board & corrugated box etc. Its strength under multidirectional 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.

The “PRC” 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.
The equipment is raggedly designed to give a long & trouble free life. The components are brighter chrome plated or painted in metallic paint to give the tester an aesthetic appearance.

Technical Specification:

• Capacity : 0 to 50 kg/cm²
• Least Count : 0.1 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
• (Other power option also available)
• Clamping : Manual

PRC has developed & designed its most advance model of Pressure Decay type Air Leakage Testing systems for precision leakage detection through dry air leakage testing. It is faster, precise & reliable testing machines which consumes much lesser time to detect the leakage in comparison to other type of leakage testing

Salient Features:

• User friendly, easy to operate
• All test parameters such as pressure limit, leak rate, test cycle settable
• Least testing time
• Rugged & robust construction
• Endless performance
• Less maintenance
• Better GO/NO result quality
• Better accuracy & precise measurement
• Complete machine with fixture & pneumatic

Working Principle:

In pressure decay method, the part under test is pressurized (i.e. filled with air until it reaches a set pressure), then isolated from the supply pressure. The pressure within the part is monitored using a pressure sensor, and as the air leaks out, the pressure drops. The leak rate can be calculated based on the change in pressure over a certain period of time.