An ISO Certified Company

Proving Rings

Proving rings are used for load measurements and are used in the outfits of a number of Soil/Cement and Bitumen Testing Equipments like Direct Shear Test Apparatus, C.B.R. Test, Uncontined 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 is measured by a sensitive dial gauge fixed co-axially at the centre of the proving ring. The dial gauge readings thus obtained versus load applied enable the operator to find unknown load, just by noting the dial gauge reading for the 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 1,00,000 kg capacity provided with 1/2 inch B.S.F. femal threads. Loading bosses and a loading ball nipple and steel ball are supplied with each ring. Rings of capacity over 25000 Kg are not just threaded.Each ring is individually calibrated and supplied with works calibration chart and a carrying case.
Calibration charts from Standard Laboratories for the proving rings ordered are also available at extra cost.All proving rings are Integral Type. Integral type compressive proving rings of different capacities from 50 kgf to 200000 kgf are available.
a) above cap. 50 to 500 kg
b) above cap. 500 to 3000 kg
c) above cap. 3000 to 5000 kg
d) above cap. 5000 to 10000 kg
e) above cap. 100000 to 20000 kg
f) above cap. 20000 to 30000 kg
g) above cap. 30000 to 50000 kg
h) above cap. 50000 to 100000 kg
i) above cap. 100000 to 200000 kg
j) above cap. 200000 to 300000 kg
 

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