COMPANY INSIDE SOILS ENTHUSIASTS RETAILERS GROWERS IT EN H VOLUMETRIC CONTROL Cultivation substrates are sold on a volumetric basis, but due to their nature as composite materials, i.e. consisting of a solid, a liquid and a gas phase, they are subject to volume changes resulting from the processes that take place between production and consumption, essentially, in the storage and transportation phases. For this reason, some methods have been developed to allow the repeatable evaluation of the apparent volume of the material. In Vigorplant, we use the method introduced by the European Union, EN 12580, and also incorporated in 2002 by the UNI Italian National Unification Body. We can therefore determine the quantity (volume) of substrate that is sold both in bulk and in packages. Materials are weighed in a container of known volume, the apparent volume mass is then determined, and the volume is finally calculated from these same values. VOLUMETRIC CONTROL Here is how we calculate the volume, also known as the apparent density of the material. DISINTEGRATION GRILL A meshed sieve of 20, 40 or 60 mm, depending on the material, is placed at no more than 50 mm above the collar. D COLLAR It is rigid, of the same diameter as the measuring cylinder and with a height of 75±2 mm. D MEASURING CYLINDER A rigid container, with a volume of 20±0.4 l, with a height/diameter ratio between 0.9:1 and 1:1. The volume of the cylinder, V1, must be known with an accuracy of 10 ml at 20°C. (Please note that the specific gravity of the water at 20°C is 997.15g). It is therefore not necessary to make any pressure-related correction. D APPARENT DENSITY OF THE MATERIAL (DA) DA = ( M4 - M3 ) V1 M3 is the weight (mass) in grams of the measuring cylinder; M4 is the weight (mass) in grams of the measuring cylinder and its content; V1 is the volume in litres of the measuring cylinder. FOR THE EVALUATION OF CUBE METERS, THE FOLLOWING PROCEDURE WILL BE USED: a 20-litre box of the product being sold is filled, making it pass through a screen with a 20, 40 or 60-mm mesh, depending on the type of product, without putting any mechanical pressure. The net weight of the product contained in the 20-litre case, multiplied by 50 times, is equal to the weight of 1 m3. VIGORPLANT ITALIA SRL VIA A.VOLTA 2 - 26821 FOMBIO (LO) P.IVA: 00971460332 INFO@VIGORPLANT.IT T: +39 0377430345 FAX: +39 0377430351 PRIVACY POLICY NEW AGENT ORDERS 2 3 5 4 1 VIGORPLANT usa i cookie per assicurarti una migliore esperienza di navigazione sul sito. Per saperne di più, conoscere i cookie utilizzati dal sito ed eventualmente disabilitarli, leggi la nostra Cookie policy. Se prosegui nella navigazione acconsenti all’utilizzo dei cookie su questo sito. Ho capito e desidero procedere.