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Series BB Bourdon Tube Differential Pressure Switch
Stainless Steel Bourdon Tubes, Adjustable Deadband, High Pressure
 

Welded stainless steel Bourdon tubes reduce chance of leakage, (even in the event of fire), in Model BB Differential Pressure Switches. Units are ideal for checking differential pressure (head) across high pressure pumps and filters. Hermetically sealed mercury wetted contacts help ensure reliable operations. Extra sensitive (fixed deadband) units are available on special order, as are weatherproof and explosion-proof enclosures. See Dimensional Information
SPECIFICATIONS
Wetted Materials: 403 SS Bourdon tube. 316 SS optional.
Temperature Limits: -10 to 180°F (-23 to 82°C).
Pressure Limit: Maximum pressure of the operating range.
Enclosure Rating: General purpose. Weatherproof and explosion-proof optional.
Switch Type: SPST mercury switch. Models shown close on increase of differential pressure. Replace "-3" with "-2" in model number for open on increase.
Electrical Rating: 5 A @ 120 VAC, 2.5 A @ 240 VAC, 2.5 A @ 120 VDC, 1 A @ 240 VDC.
Electrical Connections: Screw type.
Conduit Connection: 7/8" (22.23 mm) hole for 1/2" (12.7 mm) conduit hub.
Process Connection: 1/4" male NPT . 1/2" male NPT on ranges 15S and 16S.
Mounting Orientation: Vertical. Vibration Free.
Set Point Adjustment: Thumbwheel screw.
Weight: 4 lb (1.8 kg).
Deadband: See chart on "Ordering" page.
Agency Approval: CSA.
 
SWITCH DEADBAND
RANGE TABLE psi (hg/cm 2)
SINGLE STAGE
TWO STAGE 4XX
Range
No.
Adj. Range
psid
(kg/cm2)
Max.
Range
psid
(kg/cm2)
Approx.
Fixed Deadband
2XX-2
2XX-3
psid (kg/cm2)
Adjust.
Deadband
5XX-2
5XX-3
psid
(kg/cm2)
Approx.
Fixed
Deadband
Each Switch
psid (kg/cm2)

Spread Between
Switch Operations
psi (kg/cm 2)
Min.
Max.
Min.
Max.

25S
6S
8S
9S
10S
11S
12S
13S
15S
16S
23E
6E
4E
9E
21E
22E
11E
13E

0-40 (0-2.8)
0-40 (0-2.8)
0-120 (0-8.4)
0-180 (0-12.6)
0-360 (0-25.2)
0-600 (0-42)
0-900 (0-63)
0-1500 (0-105)
0-3000 (0-210)
0-5000 (0-350)
0-38 (0-2.65)
0-36 (0-2.50)
0-55 (0-3.85)
0-200 (0-14)
0-275 (0-19)
0-450 (0-31)
0-500 (0-35)
0-925 (0-65)

60 (4.2)
100 (7)
200 (14)
300 (21)
600 (42)
1000 (70)
1500 (105)
2500 (175)
5000 (350)
8000 (562)
75 (5)
100 (7)
150 (10)
300 (21)
400 (28)
800 (56)
1000 (70)
2500 (175)
.4 (0.028)
.4 (0.028)
.75 (0.053)
1.25 (0.088)
5 (0.35)
10 (0.7)
10-15 0.7-1.05)
30 (2.1)
50 (3.5)
150 (10.5)
1.25 (0.09)
1.8 (0.12)
2 (0.14)
3.75 (0.26)
6.5 (0.46)
13 (0.90)
25 (1.75)
50 (3.50)
3 (0.21)
3 (0.21)
4 (0.28)
6 (0.42)
15 (1.05)
20 (1.4)
40 (2.8)
50 (3.5)
125 (8.75)
500 (35)
3.5 (0.25)
4 (0.28)
5 (0.35)
14 (1.0)
18 (1.27)
20 (1.40)
25 (1.75)
65 (4.60)
40 (2.8)
40 (2.8)
120 (8.4)
180 (12.6)
360 (25.2)
600 (42)
900 (63)
1500 (105)
3000 (210)
5000 (350)
38 (2.65)
36 (2.50)
55 (3.85)
200 (14)
275 (19)
450 (31)
500 (35)
925 (65)

.5 (0.035)
.5 (0.035)
2 (0.14)
4 (0.28)
7 (0.49)
--
12 (0.84)
20 (1.4)
40 (2.8)
125 (8.8)
2 (0.14)
2.5 (0.18)
3.25 (0.23)
6 (0.43)
9 (0.64)
20 (1.40)
35 (2.50)
50 (3.50)
2 (0.14)
2 (0.14)
3 (0.21)
5 (0.35)
12 (0.84)
--
32 (2.24)
62 (4.34)
100 (7)
300 (21)
2.25 (0.16)
3 (0.21)
4 (0.28)
7 (0.49)
12 (0.84)
26 (1.83)
45 (3.10)
90 (6.23)
12 (0.84)
12 (0.84)
40 (2.8)
60 (4.2)
80 (5.6)
--
200 (14)
300 (21)
1500 (105)
2000 (140)
5.5 (0.40)
9 (0.63)
11 (0.77)
27 (1.90)
60 (4.22)
75 (5.27)
125 (8.80)
175 (12.30)

 

 
Popular Models
Model
Number		 Operating Range - psig (bar) Differential Range - psid (bar) Minimum/Maximum Dead Band - psig (bar)
 BB-523-3-6S 5-100 (.3-6.9) 0-40 (0-2.8) 3/40 (.21/2.8
 BB-523-3-8S 40-200 (.7-13.8) 0-120 (0-8.3) 4/120 (.28/8.3)
 BB-523-3-9S 10-300 (.7-20.7) 0-180 (0-12.4) 6/80 (.41/5.5)
 BB-523-3-10S 25-600 (1.7-41.4) 0-360 (0-24.8) 15/360 (1.0/24.8)
 BB-523-3-11S 50-1000 (3.5-69.0) 0-600 (0-41.4) 20/600 (1.4/41.4)
 BB-523-3-12S 100-1500 (639-103.4) 0-900 (0-62.1) 40/900 (2.8/62.1)
 BB-523-3-13S 300-2500 (20.7-172.4) 0-1500 (0-103.4) 50/1500 (3.5/103.4)
 BB-523-3-15S 500-5000 (34.5-344.7) 0-30009 (0-206.8) 200/3000 (8.6/206.8)
 BB-523-3-16S 1000-8000 (69.9-551.6) 0-5000 (0-344.7) 500/5000 (34.5-344.7)
 
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