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A Practical Reference Table Worth Collecting (Part 1): Conversion Table for Various Viscosity Standards

Release time:

2016-06-28 16:49

A Practical Reference Table Worth Collecting (Part 1): Conversion Table for Various Viscosity Standards

Standard viscosity (centipoise)	Format tube		Ku value	Rotational viscometer, 100 kg load	Engler viscometer (seconds)	Ford Cup No. 4	DIN viscosity cup			Nirke Cup (seconds)	Tou-4# Viscometer (seconds)	Viscometer No. 1 (seconds)
Standard viscosity (centipoise)	Number	Bubble seconds	Ku value	Rotational viscometer, 100 kg load	Engler viscometer (seconds)	Ford Cup No. 4	2#	3#	4#	Nirke Cup (seconds)	Tou-4# Viscometer (seconds)	Viscometer No. 1 (seconds)
10	A-4			3.5	94	11	16			2	10	2.5
25	A2			9.5	190	16	19			3	14	3.5
50	A		30	19.5	350	20	23			4	18	4.5
65	B					26	27			5	22	6.0
85	C					34	33			6	28	7.0
100	D	1.46	40	40.7	750	40	38	12	10	7	30	7.5
125	And E	1.83				46	46			8	32	8.0
140	F	2.05	46	53	1050	51	51	16	13	9	38	9.5
165	G	2.42				57	60			10	42	10.1
180	GH	2.64	50	70	1350	60		23	16	11	45	11.0
200	H	2.93	52	77	1500	65		26	17	12	50	12.0
225	I	3.30				75		28	20	14	57	14.0
250	J	3.67	57		1870	85		30	21	16	65	16.0
275	K	4.03				96		32	22	18	73	18.0
300	L	4.40	60	114	2250	108		34	24	20	80	20.0
320	M	4.70		118		117		35	25	22	88	22.0
340	N	5.00		125		123		37	27	31	123	31.0
370	O	5.40		138		127		39	29	32	128	32.0
400	P	5.80	64	150	3000	131		42	30	33	133	33.0
435	Q	6.40				137		45	32	35	138	34.0
470	R	6.90				144		48	34	36.5	144
480	R+	7.13	67	183	3600	147				37	147
500	S	7.30	68	191	3725	154		50	36		154
550	T	8.10	69	204		166		54	39		166
627	You	9.20						60	43
800	U.V	11.60	77	293	6000
884	V	13.00							50
1000	W	15.70		354	7500
1400	X	18.90	96	498	10350
1500	X-	21.10	98	539	11100
2300	Y.Z	25.80	105	827	16800
2500	Z1	39.60	114	893	18250
3400	Z2	49.85	125
4500	Z3	67.90	136	1610	32400
6500	Z4	91.00		2310	46000
10000	Z5	114.50		3580	67400
15000	Z6	217.10			105000

Centipoise

The centipoise (cP) is the smallest unit of dynamic viscosity. Dynamic viscosity measures the internal frictional force within a liquid as it flows under a given shear stress. It is defined as the ratio of the shear stress applied to the flowing liquid to the shear rate. In the International System of Units, it is expressed in Pa·s, but it is conventionally denoted by cP.

Format tube

The Ford viscosity cup is a glass tube with a stopper, approximately 10.75 mm in inner diameter and 115 mm in height, featuring two calibration marks at 100 mm and 108 mm. Typically, 20 cups are packed in a box. It is used to hold liquid samples and is widely employed in coating research laboratories, architectural decoration industries, and the coatings and paint manufacturing sector.
When performing the measurement, fill the liquid up to the 100 mm mark. After reaching a constant temperature, insert the stopper until the liquid level reaches the 108 mm mark. Continue maintaining the temperature for 10 minutes, then quickly invert the viscometer and place it vertically in a 25℃ water bath. Measure the time required for an air bubble to rise from the bottom of the viscometer to its top. Express the result in seconds, and clearly indicate that the measurement was conducted at 25℃.

Stomer viscometer

The Stormer viscometer is primarily used to determine the viscosity of paints and other coatings whose viscosity is expressed in KU units. This instrument does not require weights and can directly display the KU value of the sample being tested on its screen. Its applications include paints, coatings, inks, adhesives, and paste-like materials.

Rotational viscometer

A rotational viscometer is used to measure the viscous resistance and dynamic viscosity of liquids. It is widely employed to determine the viscosity of various fluids, including oils, paints, plastics, food, pharmaceuticals, cosmetics, adhesives, paper-making materials, and chemical products. It is a precision instrument essential for monitoring and controlling product quality stability in manufacturing processes.

Engler viscometer

The Engler viscometer is designed and manufactured in accordance with the requirements specified in the national standard GB/T 266, "Method for Determination of Engler Viscosity of Petroleum Products," and in T0622, "Engler Viscosity Test for Asphalt (Engler Viscometer Method)," which is part of the national industry standard JTJ 052, "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering. It is suitable for determining the Engler viscosity of a liquid—the ratio of the time (in seconds) required for the liquid to flow out of the Engler viscometer under specified temperature and volume conditions to the time (in seconds) required for distilled water to flow out at 20°C. The unit of Engler viscosity is the Engler degree. This instrument can simultaneously test two samples in the same temperature environment and calculate the average time, making it an ideal tool for determining the Engler viscosity of petroleum products and asphalt products.

Ford No. 4 Cup

The Ford cup is manufactured in accordance with the paint and raw material standards ASTM D 1200, D333, and D365 established by the American Society for Testing and Materials. It is a convenient viscometer used to determine the viscosity of inks, coatings, paints, and similar materials. The cup is meticulously crafted from high-quality aluminum and features a small hole at its base, with a capacity of approximately 100 ml. The Ford cup measures the viscosity of a sample by determining the time it takes for a specified volume of the sample to flow out through the small hole at the bottom of the cup.

DIN viscosity cup

The DIN viscosity cup is very easy to use. It is made of anodized aluminum, with a stainless steel orifice, and is designed to measure the viscosity of paints, varnishes, and similar products. The measured dynamic viscosity is typically expressed as the number of seconds required for the liquid to flow out. The cups are available in DIN No. 2, No. 3, and No. 4 sizes.

Apply - 4 cups

The ZHU-4 cup is the most widely used viscosity cup in China. Designed according to GB/T 1723-93, it is suitable for measuring the conditional viscosity (outflow time no greater than 150 seconds) of paints and other related products. Under specified temperature conditions, the cup measures the time required for a fixed volume of sample to completely flow out through a hole of a specified diameter, with the result expressed in seconds (S).

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