specialists in fluid handling and spray finishing equipment since 1995

Technical Information

The following links and text are technical information commonly used in spray, powder, and wood finishing, as well as other industrial applications. We have provided this information to help you better understand your applications, or as a reference for common questions one can run into in these fields. To the best of our knowledge, this information is accurate and up-to-date, but this information is made available for reference only as engineering is best left up to the engineers.

If you notice any discrepancies please feel free to inform us at info@midwayis.com, and we will correct any mistake promptly. Thank you and remember if you are in need of industrial equipment, Midway Industrial Supply and Midway Industrial Systems has the products and experience you need for a cost-effective solution to your industrial process.

Bead Size Diameter Vs. Volume Chart

Bead Size Diameter Conversion
Round bead size diameter (inches)	Cubic inches per 1000 lineal feet	Approx. U.S. gallons per 1000 lineal feet	Approx. lineal feet per U.S. gallon
1/16"	36.8	0.16	6000
3/32"	82.9	0.36	2700
1/8"	147.3	0.64	1500
3/16	331.7	1.44	675
1/4"	589.1	2.55	375
5/16"	920.4	3.98	240
3/8"	1325.4	5.74	165
1/2"	2356.2	10.20	95
5/8"	3861.6	15.92	50
3/4"	5300.4	22.95	35
1"	9424.8	40.80	19

Standard Viscosities

Acetone	.3	centipoise (cps)
Adiprene (urethane)	35,000	centipoise (cps)
Benzine	.5	centipoise (cps)
Blood	10	centipoise (cps)
Chocolate Syrup	10,000	centipoise (cps)
Corn Syrup	110,000	centipoise (cps)
Ethylene Glycol	16	centipoise (cps)
Glue (hot melt)	30,000,000	centipoise (cps)
Honey	3000	centipoise (cps)
Ink	45,000	centipoise (cps)
Ketchup (Heinz)	50,000	centipoise (cps)
Lacquer	250-1,100	centipoise (cps)
Linseed Oil (boiled/raw)	64/28	centipoise (cps)
Maple Syrup	144	centipoise (cps)
Methyl Ethyl Ketone (MEK)	.4	centipoise (cps)
Milk	3	centipoise (cps)
Molasses	5000	centipoise (cps)
Mustard	70,000	centipoise (cps)
Oil SAE 10	65	centipoise (cps)
Oil SAE 20	125	centipoise (cps)
Oil SAE 30	200	centipoise (cps)
Oil SAE 40	319	centipoise (cps)
Oil SAE 50	540	centipoise (cps)
Oil SAE 60	1,000	centipoise (cps)
Oil SAE 70	1,600	centipoise (cps)
Oil SAE 80 (trans. grades)	240	centipoise (cps)
Oil SAE 90 (trans. grades)	590	centipoise (cps)
Oil SAE 140 (trans. grades)	2,200	centipoise (cps)
Oil Caster	240-1,000	centipoise (cps)
Oil Core	29	centipoise (cps)
Oil Corn	72	centipoise (cps)
Oil Crude	15	centipoise (cps)
Oil Soybean	160	centipoise (cps)
Peanut Butter (Skippy)	250,000	centipoise (cps)
Salad Dressing (Miracle Whip)	250,000	centipoise (cps)
Shortening (Crisco)	1,200,000	centipoise (cps)
Sulphuric Acid (100%)	.2	centipoise (cps)
Toluol	.6	centipoise (cps)
Tomato Paste	190,000	centipoise (cps)
Turpentine	1	centipoise (cps)
Varnish (spar)	420	centipoise (cps)
Vaseline Petroleum Jelly	64,000	centipoise (cps)
Water	1	centipoise (cps)
Xylol	.6	centipoise (cps)
Blood	10	centipoise (cps)
Motor Oil (SAE 10)	50	centipoise (cps)
Motor Oil (SAE 40)	250	centipoise (cps)
Motor Oil (SAE 60)	1000	centipoise (cps)
@ 70 degrees F

Flow Through A Tip

Flow = (22 x (Orifice Diameter)² x Sqrt(Spray Pressure)) / (Specific Gravity)

*Pressure in PSI, Orifice Diameter in Inches, Flow in Gallons Per Minute

Minimum Flow Rates

Circulating of paints and similar materials containing pigments or fillers requires fluid flow velocities high enough to maintain the contained particles in suspension. A velocity of 60 feet per minute has been accepted as a minimum velocity to maintain suspension. For your convenience, we have calculated the minimum flow rates for various size tubes and placed them in a easy to read table below.

Circulating Line Size	Minimum Flow Rate
1/4" std. pipe	0.325
3/8" std. pipe	0.595
5/8" O.D. x.035" wall tube	0.75
1/2" std. pipe	0.95
7/8" O.D. x .035" wall tube	1.58
3/4" std. pipe	1.66
1" O.D. x .035" wall tube	2.12
1" std. pipe	2.69
1 1/4" std. pipe	4.66
1 1/2" std. pipe	6.35
2" std. pipe	10.5

*To calculate minimum flow rates for other tube sizes use the following formula: Flow rate(Gallons Per Minute) - 3.11 x Inside Area of tube(Inches²)

Conversion Factors

Length
1 in = 25.4 mm = 2.54 cm = .0254 m
1 ft = 12 in = 30.48 cm = .304 m
1 yd = 3 ft = 36 in = .9144 m
1 mile = 1,760 yd = 1.6092 km
1 mm = .1 cm = .0394 in = .003281 ft
1 cm = 10 mm = .01 m = .3937 in = .03281 ft
1 m = 100 cm = 1000 mm = 39.365 in = 3.28 ft
1 km = 1000 m = 3280 ft = 0.6214 miles

Weight
1 oz = .0625 lb = 283.5 mg = 28.35 g = .0283 kg
1 lb = 16 oz = 4536 mg = 453.6 g = .4536 kg
1 short ton = 2,000 lb = 907.18 kg
1 long ton = 2,240 lb = 1,016 kg
1 mg = .1 cg = .001 kg = .0035 oz = .0002205 lb
1 g = 1,000 mg = .0353 oz = .00220 lb
1 kg = 1,000 g = 1,000,000 mg = 35.3 oz = 2.2046 lb
1 metric ton = 1000 kg = 2204.61 lb = .9842 long ton

Area
1 in² = 6.4516 cm² = 0.0069444 ft²
1 ft² = 144 in² = 929.03 cm² = .0929 m²
1 yd² = 1296 in² = 9 ft² = 0.8361274 m²
1 mile² = 3,097,600 yd² = 2,589,988.1 m² = 2.589 km²
1 cm² = .0001 m² = 0.155 in²
1 m²= 10,000 cm² = 1,550 in² = 10.764 ft²
1 km²= 1,000,000 m² = 1,195,990 yd² = .3861 mile²

Fluid Volume
1 fl oz = .0296 l = .125 cup = .0625 fl pt = .03125 fl qt = .007813 gal
1 l = 33.81 fl oz = 4.227 cup = 2.113 fl pt = 1.057 fl qt = .264 gal
1 cup = 8 fl oz = .2366 l = .5 fl pt = .25 fl qt = .0625 gal
1 fl pt = 16 fl oz = .4732 l = 2 cup = .5 fl qt = 0.125 gal
1 fl qt = 32 fl oz = .9462 l = 4 cup = 2 fl pt = .25 gal
1 gal = 128 fl oz = 3.785 l = 16 cup = 8 fl pt = 4 fl qt

Force & Pressure
1 lb force = 4.448 Newton
24 psi = 1.633 atm = 6.9 kpa = 1.65 bar = 1,241 mm of merc.

Power
1 ft*lb/s = 1.35 W
1 hp = 746 W

Temperature

Fahrenheit = (1.8 x °C) + 32

Celsius = (°F-32)/1.8

Comfortable room	22 °C	68 °F
Human body	37 °C	98 °F
Lead melts	328 °C	622 °F
Baking oven	150 °C	302 °F
Water boils	100 °C	212 °F
Water freezes	0 °C	32 °F
Mercury freezes	-40 °C	-40 °F

Hardness Comparison Chart

Hardness Value
Durometer Scale:	A	B	C	D	O	OO
	100	85	77	58
	95	81	70	46
	90	76	59	39
	85	71	52	33
	80	66	47	29	84	98
	75	62	42	25	79	97
	70	56	37	22	75	95
	65	51	32	19	72	95
	60	47	28	16	69	93
	55	42	24	14	65	91
	50	37	20	12	61	90
	45	32	17	10	57	88
	40	27	14	8	53	86
	35	22	12	7	48	83
	30	17	9	6	42	80
	25	12			35	76
	20	6			28	70
	15				21	62
	10				14	55
	5				8	45

Reference Numbers:
Human skin = 20 on Dur. A
Pencil eraser = 60 on Dur. A
Auto tire = 75 on Dur. A
Typewriter roller = 90 on Dur. A
Telephone handset = 75 on Dur. D

How Much Paint / Material is in a Length of Hose?

Material Per Length Of Hose
Hose I.D. in inches	Hose Length 25 ft	Hose Length 50 ft	Hose Length 100 ft
1/4"	8.2oz / 241.3cc	16.4oz / 482.6cc	32.8oz / 965.2cc
5/16"	12.7oz / 377cc	25.4oz / 754cc	50.8oz / 1508cc
3/8"	18.4oz / 543cc	36.8oz / 1086cc	73.6oz(.57gal) / 2172cc
1/2"	32.6oz / 965.3cc	65.2oz(.5gal) / 1930.6cc	130.4oz(1.02gal) / 3860cc
3/4"	73.4oz(.57gal) / 2172cc	146.oz(1.1gal) / 4344cc	293.6oz(2.2gal) / 8688cc
1"	130.6oz(1.02gal) 3861cc	261.2oz(2.04gal) 7722cc	522.4oz(4.09gal)15444cc

Wet Film Thickness vs. Area Conversion

Wet film to area conversion

Wet film thickness (mils.)	Approx. area in square feet
1.00	1604
1.50	1069
2.00	802
2.50	642
3.00	535
3.20	501
3.40	472
3.60	446
3.80	422
4.00	401
4.20	382
4.40	365
4.60	349
4.80	334
5.00	321
8.00	201
10.00	160

Area to wet film conversion

One gallon covers this many square feet	Approx. wet film thickness (mils.)
1000	1.60
950	1.69
900	1.78
850	1.89
800	2.00
775	2.07
750	2.14
725	2.21
700	2.29
675	2.38
650	2.47
625	2.57
600	2.67
575	2.79
550	2.92
525	3.06
500	3.21
300	5.34
100	16.04

Contact us at 1-800-279-1401 or info@midwayis.com