Compression Proving Rings

Proving rings are used for load measurements and are used in outfits of a number of Soil / Cement & Bitumen Testing Equipments like Direct Share Test Apparatus, Triaxil Share Test Apparatus, CBR Test, Unicontained Test, Marshall Test etc. They are made out of special steel carefully forged to give maximum strength and machined to give highest sensitivity combined with stability to ensure long life and accuracy. When Compressive or tensile load is applied within the elastic range, the proving rings get temporarily deformed. This deformation is measured by a sensitive dial gauge fixed co-axially at the center of proving ring. The dial gauge readings thus obtained versus load applied enable the operator to find out unknown load, just by noting the dial gauge reading for unknown load. The proving rings have high elasticity and on removing load they regain their original shape provided they are loaded in their elastic limits.
A Dial gauge and plunger anvil are mounted on brackets clamped to the ring body. The dial gauge is held perfectly rigid without the remote chance of shifting due to inadvertent shocks or pressures exerted on it. The dial gauge plunger rests on an adjustable anvil. Proving Rings , from 50 kg to 1,00,000kg capacity provided with 1/2 inch B.S.F female threads. Loading bosses and a loading ball nipple and steel ball are supplied with each rings. Rings of capacity over 25000kg (or 25 Tonnes) are not thus threaded. Each ring is individually calibrated and supplied with works calibration chart and a carrying case.