TQC SHEEN BS Flow Cup, BS3900 (1971) old specification B2 , B3, B4 , or B6
The BS Viscosity Cups is a range of anodized aluminum viscosity cups with integral nozzle. Suited for measuring paints, lacquers and other fluids. (Note: the cup doesn’t have a stainless steel insert).
According to (old type) BS3900: Part A6, 1971. This specification is replaced by BS EN ISO 2431/8S3900 part A6:1996 – see BS EN ISO 2431 series of cups.
|Viscosity Cups – BS 3900 part A6 : 1971 Standard|
|Description||BS Standard||Recommended viscosity range and flow time|| |
Orifice Diameter (mm)
|BS Standard Viscosity Range|
based on 30 – 300 seconds flow time.
Viscosity units cSt
based on 30 – 100 seconds flow time.
Viscosity units Cst
|13 – 43||Break|
|SH0127||30 – 370||30 – 120||3.17|
|SH0165||70 – 850||70 – 280||3.97|
|SH0201||150 – 1680||150 -550||4.76|
|SH0230||630 -6600||630 – 2200||7.14|
The BS Cups have been superseded by BS EN ISO 2431 series of cups.
The cups were originally designed for a flow time range of 30 – 300 seconds (break point*1 method) and 30 – 200 seconds (for fixed volume*2 method).
*1 Break point: The timing is taken at the first break in the continuous flow of the sample.
*2 Fixed volume: For this method the cup is filled as normal, but timing is stopped after a fixed volume (50ml) of sample has passed through the cup orifice.
For optimum performance it is recommend to use the cups within a flow time range of 30 – 100 seconds, (table above refers) using the cups for sample flow above 100 to 300 seconds is not recommended as the linearity is not proportional to higher viscosity products.
Cups can be supplied with Calibration Certificates