Type R622
2
Body Size and End Connection Style
1/2 NPT
Maximum allowable inlet Pressure
(1)
Operating: 125 psig (8,62 bar)
Emergency: 125 psig (8,62 bar)
Except 1.8 to 2.2-inches w.c. (4 to 5 mbar) spring
range which has operating and emergency
pressures of 60 psig (4,14 bar)
Maximum allowable Outlet (Casing) Pressure
(1)
Operating to avoid internal Part Damage:
3 psid (0,21 bar d) above outlet pressure setting
Emergency: 20 psi (1,38 bar)
Outlet Pressure Ranges
See Table 1
Pressure Registration
Internal
Orice Size
1/8-inch (3,2 mm)
1. The pressure/temperature limits in this instruction manual or any applicable standard limitation should not be exceeded.
Specications
Flow Coefcients
Wide-Open C
g
for Relief Sizing: 12.5
Wide-Open C
v
for Relief Sizing: 0.36
C
1
: 35
IEC Sizing Coefcients
X
T
: 0.78
F
D
: 0.82
F
L
: 0.89
internal Relief Performance
Start-to-Discharge is 8 to 22-inches w.c.
(20 to 55 mbar) for setpoints from
1.8 to 20-inches w.c. (4 to 50 mbar)
Start-to-Discharge is 140 to 200% over setpoint
from 20-inches w.c. to 2.2 psig (50 to 152 mbar)
Spring Case Vent Connection
3/4 NPT with removable screen
Maximum Temperature Capabilities
(1)
-20° to 160°F (-29° to 71°C)
approximate Weight
2.35 pounds (1 kg)
Table 1. Outlet Pressure Ranges
OUTLET PRESSURE RangE
COnTROL SPRing
PaRT nUMBER
COnTROL SPRing
COLOR CODE
SPRing FREE LEngTH,
inCHES (mm)
SPRing WiRE DiaMETER,
inCHES (mm)
1.8 to 2.2-inches w.c.
5 to 7-inches w.c.
6.5 to 9-inches w.c.
9 to 13-inches w.c.
13 to 20-inches w.c.
16 to 35-inches w.c.
1 to 2.2 psig
(4 to 5 mbar)
(12 to 17 mbar)
(16 to 22 mbar)
(22 to 32 mbar)
(32 to 48 mbar)
(40 to 87 mbar)
(69 to 152 mbar)
T14453T0012
T14398T0012
T14399T0012
T14400T0012
T14401T0012
T14402T0012
T14403T0012
Purple
Orange
Yellow
Silver
Gray
Pink
Light Blue
3.40 (86,4)
3.40 (86,4)
3.61 (91,7)
4.10 (104)
3.60 (91,4)
3.52 (89,4)
3.66 (93,0)
0.051 (1,30)
0.062 (1,58)
0.067 (1,70)
0.072 (1,83)
0.080 (2,03)
0.093 (2,36)
0.105 (2,67)
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