Brochure

Tunstall Corporation
118 Exchange Street • Chicopee, MA 01013
We reserve the right to alter designs, specifications and information without notice.
Phone [phone] · Fax [phone]
www.tunstall-inc.com • www.maconcontrols.com
Bulletin-MC-ENG-DATA-0714
Warranty & Engineering Data
EQUIVALENTS &
CONVERSION FACTORS
ºC ºF ºC ºF ºC ºF
-17.8 0.0 21.7 71 57.2 135
-15.0 5 22.2 72 60.0 140
-12.2 10 22.8 73 62.8 145
-10.0 14 23.3 74 65.6 150
-9.4 15 23.9 75 68.3 155
-6.7 20 24.4 76 71.1 160
-5.0 23 25.0 77 73.9 165
-3.9 25 25.6 78 76.7 170
-1.1 30 26.1 79 79.4 175
0.0 32 26.7 80 82.2 180
1.7 35 27.2 81 85.0 185
4.4 40 27.8 82 87.8 190
5.0 41 28.3 83 90.6 195
7.2 45 28.9 84 93.3 200
10.0 50 29.4 85 96.1 205
12.8 55 30.0 86 98.9 210
15.0 59 30.6 87 100.0 212
15.6 60 31.1 88 101.7 215
16.1 61 31.7 89 104.4 220
16.7 62 32.2 90 110.0 230
17.2 63 35.0 95 115.6 240
17.8 64 37.8 100 121.1 250
18.3 65 40.6 105 126.7 260
18.9 66 43.3 110 132.2 270
19.4 67 46.1 115 137.8 280
20.0 68 48.9 120 143.3 290
20.6 69 51.7 125 148.9 300
21.1 70 54.4 130
Temperature Conversion - ºC / ºF
Other Conversions:
C
v
= Kv x 1.16
GPM = M3/HR x 4.13
GPM = Liters/second x 15.85
Inches = Meters (M) x 39.37
Inches = Millimeters (mm) x 0.03937
Pounds = Gallons on water (@65ºF) x 8.34
Pounds = Gallons on water (@212ºF) x 7.99
PSI = KPa x 0.145
PSI = Feet of water (@62ºF) x 0.434
C
v
Formulas:
The valve capacity is generally expressed by a C
v
factor.
The equations used for the C
v
factor calculations are:
C
v
=
GPM = C
v
P =
Where:
GPM = The water volume in gpm
P = The pressure drop in PSI across the valve
METRIC to METRIC
BARS x 100 = KPa
Kg/Cm
2
x 98.07 = KPa
PASCALS x 1000 = KPa
mm of Hg x 0.1333 = KPA
ºK - 273 = ºC
METRIC to ENGLISH
KPa x 0.145 = psi
BARS x 14.5 = psi
Kg/hr x 2.2 = Lb/hr
M
3
/hr x 4.4 = USGPM
M/sec x 3.28 = Ft/sec
M
3
/hr x 35.31 = Ft
3
/hr
Mm x 0.03937 = In.
ºC (1.8) + 32 = ºF
*Density at Standard Atmospheric Conditions
p
GPM

p
2






vC
GPM
ENGLISH to ENGLISH
Atmospheres x 14.7 = psi
Ft. of H
2
O x 0.4335 = psi
In. of H
2
O x 0.03613 = psi
In. of Hg x 0.4912 = psi
Lb/hr
(LIQ)
x = GPM
Lb/hr
(GAS)
÷ Density* = SCFH
ºR - 460 = ºF
ENGLISH to METRIC
psi x 6.895 = Kpa
Lb/hr x 0.4536 = Kg/hr
USGPM x 0.2271 = M
3
/hr
Ft/sec x 0.3048 = M/sec
Ft
3
/hr x 0.02832 = M
3
/hr
In. x 25.4 = mm
[ºF - 32] x 5/9 = ºC
S.G.
.002