Flow cups are designed to accurately measure the viscosity of paints, inks, varnishes and similar products. The process of flow through an orifice can often be used as a relative measurement and classification of viscosity. This measured kinematic viscosity is generally expressed in seconds of flow time which can be converted into centistokes (cSt) using a viscosity calculator.Viscosity . BYK-Gardner GmbH
Flow cups are manufactured using high grade aluminium alloy with stainless steel orifices (where indicated), flow cups are available with a range of UKAS / ISO 17025 certified standard oils to confirm the flow cup is measuring within specification.
Type Orifice diameter Viscosity range Flow times BS FLOW CUPBS 3900 (1971) Old Specification (B2)BS 3900 (1971) Old Specification (B3)BS 3900 (1971) Old Specification (B4)BS 3900 (1971) Old Specification (B5)BS 3900 (1971) Old Specification (B6) 2.38mm (0.09”)3.17mm (0.12”)3.97mm (0.16”)4.76mm (0.19”)7.14mm (0.28”) 38 - 71cSt 38 - 147cSt 71 - 455cSt 299 - 781cSt 781 - 1650cSt 30 - 300 secs DIN FLOW CUPDin Flow Cup (2mm) - Din 53211Din Flow Cup (4mm) - Din 53211Din Flow Cup (6mm) - Din 53211Din Flow Cup (8mm) - Din 53211The orifices are manufactured from stainless steel. 2mm (0.08”)4mm (0.16”)6mm (0.24”)8mm (0.31”) 15 - 30cSt112 - 685cSt550 - 1500cSt1200 - 3000cSt(approximately) 25 - 150 secs FORD FLOW CUPFord Flow Cup No 1 - ASTM D1200Ford Flow Cup No 2 - ASTM D1200Ford Flow Cup No 3 - ASTM D1200Ford Flow Cup No 4 - ASTM D1200Ford Flow Cup No 5 - ASTM D1200The orifices are manufactured from stainless steel. 2.1mm (0.08”)2.8mm (0.11”)3.4mm (0.13”)4.1mm (0.16”)5.8mm (0.23”) 10 - 35cSt25 - 120cSt49 - 220cSt70 - 370cSt200 - 1200cSt 55 - 100 secs40 - 100 secs30 - 100 secs30 - 100 secs30 - 100 secs ISO/ASTM FLOW CUPFlow Cups to BS EN ISO 2431, ISO 2431:2011 ASTM D5125Flow Cups to BS EN ISO 2431, ASTM D5125Flow Cups to BS EN ISO 2431, ASTM D5125Flow Cups to BS EN ISO 2431, ASTM D5125Flow Cups to BS EN ISO 2431, ASTM D5125The orifices are manufactured from stainless steel. 3mm (0.12”)4mm (0.16”)5mm (0.20”)6mm (0.24”)8mm (0.31”) 7 - 42cSt35 - 135cSt91 - 325cSt188 - 684cSt600 - 2000cSt 30 - 100 secs AFNOR FLOW CUPAfnor Flow Cup - 2.5mm - NF T30-014Afnor Flow Cup - 4mm - NF T30-014Afnor Flow Cup - 6mm - NF T30-014Afnor Flow Cup - 8mm - NF T30-014 2.5mm (0.10”)4mm (0.16”)6mm (0.24”)8mm (0.31”) 5 - 140cSt50 - 1100cSt510 - 5100cSt700 - 11500cSt 30 - 100 secs FRIKMAR FLOW CUPFrikmar Flow Cup 2mmFrikmar Flow Cup 4mmFrikmar Flow Cup 6mmFrikmar Flow Cup 8mmThe orifices are manufactured from stainless steel. 2mm (0.08”)4mm (0.16”)6mm (0.24”)8mm (0.31”) 15 - 30 cSt112 - 685cSt550 - 1500cSt1200 - 3000cSt(approximately) 25 - 150 secs
See also Flow measurement Viscometer Zahn cup Ford cup
References