Emerson E2 - 1.2 The E2 Building Controller (BX)

Specications
This section lists the specications for the Type E2 main valve. Factory specications are stamped on the
nameplate fastened on the regulator at the factory.
Temperature Rating
(1)
250 °F/ 121 °C
Rated Flow Coe󰀩cient
See Table 1
Main Valve Material
Cast Iron
Approximate Weight
See Table 2
Valve Sizes
NPS 3/4, 1, 1-1/4, 1-1/2, 2, 2-1/2, 3, 4, 5, 6, 8 and
10 / DN 20, 25, 32, 40, 50, 65, 80, 100, 125, 150,
200 and 250
End Connection Styles
NPT, CL125
Pressure Rating
(1)
15 psig / 1.03 bar
1. The pressure/temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.
Table 1. Type E2 Main Valve Rated Flow Coecients
SEAT
FACTOR
REGULATOR SIZE, NPS / DN
3/4 / 20 1 / 25 1-1/4 / 32 1-1/2 / 40 2 / 50 2-1/2 / 65 3 / 80 4 / 100 5 / 125 6 / 150 8 / 200 10 / 250
Full 7.6 11.7 18.9 27.4 44 68 96 143 202 255 465 748
70 to 75% - - - - 8.8 13.2 19.2 30.8 47.6 67.2 100 141 178 - - - - - - - -
46% - - - - - - - - - - - - 12.3 - - - - 30.6 - - - - 64.4 - - - - 115 - - - - 336
Table 2. Type E2 Main Valve Approximate Weight
VALVE SIZE
END CONNECTION STYLE
NPT FLANGE
NPS DN lbs kg lbs kg
3/4 20 18 8.16 - - - - - - - -
1 25 19 8.62 21
1-1/4 32 30 13.6 33
1-1/2 40 36 16.3 40
2 50 50 22.7 57
2-1/2 65 - - - - - - - - 70
3 80 - - - - - - - - 98
4 100 - - - - - - - - 135
5 125 - - - - - - - - 185
6 150 - - - - - - - - 250
8 200 - - - - - - - - 415
10 250 - - - - - - - - 690
2
Type E2