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VAPOR PRESSURE
TANK
E0063
ATMOSPHERIC PRESSURE
VACUUM PRESSURE
LOADING PRESSURE
LOADING PRESSURE
INTERMEDIATE PRESSURE
TANK PRESSURE
INTERMEDIATE PRESSURE
VACUUM PRESSURE
ATMOSPHERIC PRESSURE
TANK PRESSURE
PILOT TYPE
NPS 1 / DN 25
psig
T208PL
5.5
5.5
5.5
6.5
T208P
7.5
8.5
11.5
(1)
12.5
(1)
1. For Fluorinated Ethylene Propylene (FEP) Pilot Diaphragm, the maximum inlet pressure is 10 psig / 0.69 bar.
Principle of Operation
The Type 1290 vapor recovery regulator serves as
a vessel vapor recovery system. The Type 1290
regulator controls vessel blanketing gas pressure
when the vessel is being filled with fluid or when
ambient temperature causes the vapor gas to expand.
The system monitors the increasing blanket pressure
and throttles open to pass excess blanketing gas into
a vapor recovery system thus controlling the desired
set pressure of the vessel.
A
CONTROL LINE
TYPE T208P PILOT
E
EXHAUST LINE
Figure 2. Operational Schematic
Table 2. Maximum Inlet Pressures (Type EGR Main Valve)
MAXIMUM INLET PRESSURE
Type EGR Main Valve with Green Spring
NPS 2 / DN 50
bar
psig
bar
0.38
5.0
0.35
0.38
5.0
0.35
0.38
5.0
0.35
0.45
6.0
0.41
0.52
7.0
0.48
0.59
8.0
0.55
0.79
11.0
0.76
(1)
(1)
(1)
0.86
12.0
0.83
(1)
(1)
(1)
TYPE EGR
MAIN VALVE
TYPE 1098
ACTUATOR
D
SETPOINT
ADJUSTMENT
NPS 3 / DN 80
NPS 4 / DN 100
psig
bar
psig
4.0
0.28
3.0
4.0
0.28
3.0
4.0
0.28
3.0
5.0
0.35
4.0
6.0
0.41
5.0
7.0
0.48
6.0
10.0
0.69
9.0
11.0
0.76
10.0
(1)
(1)
The Type 1290 is used as part of the
gas blanketing system to control the
outflow of blanketing gas under normal
conditions and to collect vessel vapors
for the vapor recovery system. It is not
an ASME safety relief device. You should
provide alternate methods of emergency
overpressure protection.
Type 1290
VAPOR RECOVERY
B
VACUUM SOURCE
FIXED
RESTRICTION
C
TYPE M95H SUPPLY
REGULATOR
NPS 6, 8 x 6 or
SPRING COLOR
12 x 6 / DN 150,
200 x 150 or 300 x 150
bar
psig
bar
0.21
3.5
0.24
0.21
3.5
0.24
0.21
3.5
0.24
0.28
4.5
0.31
0.35
4.5
0.31
0.41
5.5
0.38
0.62
8.5
0.59
0.69
10.5
0.72
(1)
(1)
CAUTION
Black
Orange
Red
Olive Green
Yellow
Light Green
Light Blue
Black
3
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