Specifications

21
BAA-3308-900RA BAA-3308-550RA
316 Stainless Steel (NACE MR-01-75)
Construction:
Body, Internals, Caps
Hardcoated Aluminum
(MIL-A-8625E, Type III, Class1)
Stainless steel Fasteners Stainless steel
FKM (ASTM D-1418) (ISO-1629)–
(uorocarbon) O rings
Seals FKM (uorocarbon) O rings
25-130 psi (1.7-8.8 bar)
Pressures:
Working (Controlled) Pressure Range
15-120 psi (1-8.2 bar)
5 psi (0.3 bar) Maximum allowable Exhaust backpressure 5 psi (0.3 bar)
25-130 psi (1.7-8.8 bar) Pilot trip/reset
psi (bar)
Consult Factory
Flow:
Controlled ow
Consult Factory
Air
Media:
(40 to 50 micron ltration recommended)
Air
1/4” NPT
1/8” NPT
Porting: Valve Ports
Pilot Ports
1/4” NPT
1/8” NPT
Panel mount (1”ø hole) Mounting & Installation: Panel Mount (1”ø hole)
Red (black character “R”)
Green (black character “G”)
Indicator Colors: Trip mode (depressurized)
Working mode (pressurized)
(Consult factory for other color availability)
Red (black character “R”)
Green (black character “G”)
Inlet Pressure
Min. Reset
Pilot Pressure
Max. Trip
Pilot Pressure
15 (1.0) 9 (0.6) 3 (0.2)
30 (2.0) 14 (1.0) 6 (0.4)
50 (3.4) 23 (1.6) 12 (0.8)
70 (4.8) 31 (2.1) 20 (1.4)
90 (6.1) 38 (2.6) 27 (1.8)
110 (7.5) 46 (3.1) 33 (2.2)
120 (8.2) 50 (3.4) 37 (2.5)
DIRECTION OF
ACTUATION
(INDICATOR)
GREEN RED
CYL
IN EX IN
EXHPILOT
PILOT
4.47
113.5
1.33
33.8
1.70
43.2
1.05
26.7
.54
13.7
2.22
56.4
1.34
34.0
.50
12.7
¼” NPT (3 PORT)
⅛” NPT PILOT
Ø
.27
6.9
(3 MOUNTING HOLES)
Ø
1.0
25.4
MIN PANEL HOLE
⅛” NPT PILOT
EXHAUST PORT
⅛” NPT PILOT
INLET PORT
.56
14.2
MAX PANEL
THICKNESS
.50
12.7
.66
16.8
1.0
25.4
2.9
53.1
2.36
60
3.47
88.1
1.89
48
7.17
182.1
¼” NPT (3 PORT)
.77
19.6
.77
19.6
1.28 SQ
Indicating Relays-
Receiving type
Main Supply Relay Valve
e.g. BAA-3309-900W
See page 18.
to main system
Sensor
Sensor
Sensor
Operation Mode A
Flow path is open between the Relay inlet and “CYL” port whenever the
pilot pressure from the process monitor and the Relay inlet pressure is in
the working pressure range. In this condition the Relay indicator is green
(G). If the loss of inlet pressure occurs while in this mode, the relay ow
position and indicator color will remain unchanged.
Operation Mode B
Upon loss of the pilot signal or decrease to the minimum trip pressure,
the Relay will shift to block the inlet and to open the exhaust to the “CYL”
port. In this condition the indicator shows red (R). The Relay will not re-
set to green (G) until both sufcient pilot and inlet pressure are restored
into the Relay.
FIRST OUT INDICATOR/INDICATING RELAY-RECEIVING TYPE
Receiving Relay Circuit
(system in mode A - working range)
Dimensions are approximate.
Consult factory for actual
dimensions of specic valves.