Proving Rings are used for load measurements and are used in the outfits of a number of Soil/Cement & Bitumen Testing Equipments like Direct Shear Test Apparatus, Triaxial Shear Test Apparatus, C.B.R. Test, Unconfined 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 of 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 the 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 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 pressure exerted on it. The dial gauge plunger rests on an adjustable anvil.

 

Proving Rings, from 50kg to 1,00,000kg capacity provided ½ inch B.S.F. female threads Loading bosses and a loading ball nipple and steel ball are supplied with each ring. 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.

 

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 50kgf to 200000 kgf are avaiLable.

 

(a) Above cap. 50 to 500kgf ., 

(b) Above cap. 500 to 3000kgf .,

(c) Above cap. 3000 to 5000kgf .,

(d) Above cap. 5000 to 10000kgf .,

(e) Above cap. 10000 to 20000kgf .,

(f) Above cap. 20000 to 30000kgf .,

(g) Above cap. 30000 to 50000kgf .,

(h) Above cap. 50 000 to 100000kgf ., 

(i) Above cap. 100000 to 200000kgf .,

(j) Above cap. 200000 to 300000kgf .