COMPRESSION PROVING RING:

Introduction: 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 and Marshall Test etc.

General Description and Specifications:

• These proving rings are made out of special steel, carefully forged to give maximum strength and machined to give the highest sensitivities commensurate with high stability and to ensure long life and accuracy.
• All proving rings are integral type viz. the loading (outside) bosses are forged integral with the ring body.
• This ensures that there is no possibility of abutment shift and consequent loss of accuracy in reading that always exists in rings with bolted abutments.
• The dial gauge and anvil are mounted on U-brackets clamped to the ring body by Allen set screws.
• The dial gauge is fitted with a special back cover and threaded bush which does not permit any shift from the original diametric alignment, coaxial with the loading boss centers, that is set at the factory before calibration.
• For all compression proving rings and tension compression proving rings up to and including 5 KN capacity (a little over 500 kgf) the loading bosses have female threading, ½” B.S.F. (16 t.p.i.) The boss faces are ground and polished and are lane parallel to within 0.02mm total D.T.I. run-out.
• Caps are provided for use when loading in compression. Repeatability is as stipulated in IS 4169-1967.
• 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 capacity 50 to 500 kg.

(b) Above capacity 500 to 3000kg.

(c) Above capacity 3000 to 5000kg.

(d) Above capacity 5000 to 10000kg.

(e) Above capacity 10000 to 20000kg.

(f) Above capacity 20000 to 30000kg.

(g) Above capacity 30000 to 50000kg.

(h) Above capacity 50000 to 100000kg.

(i) Above capacity 100000 to 200000kg.

(j) Above capacity 200000 to 300000kg.