Catalogue Temperature Switches - Type 400, B-Series
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PRESSURE AND DIFFERENTIAL INDUSTRIAL PRESSURE SWITCHES
B-Series pressure, differential pressure and vacuum switches use two different industrial actuators depending on setpoint require­ments. For setpoints between 2 and 3000 psi, the simple, rugged diaphragm-sealed piston actuator is used. This design features high reliability and choice of actuator seal materials for virtually every application. An optional welded design is also available for setpoints up to 1000 psi for maximum reliability. This design is available in 316
SS or Monel. Differential pressure models use a unique, dual diaphragm-sealed piston design that features very high static operating pressures and small size.
For setpoints between 4.5 and 150 inches of H2O, a large diaphragm is used for increased sensitivity in both pressure and differential pressure designs with good choice of materials of construction.
All standard models feature ±1 percent of range setpoint repeatability and a minimum of 400 percent of range proof pressures.
These standard designs perform well in applications where shock and vibration could be a problem and may be used in conjunction with Ashcroft diaphragm seals in extreme services such as slur­ries or abrasive process fluids.
PRESSURE/VACUUM SWITCHES
Approximate Deadband(2) Switch Element
Overpressure Ratings
Nominal Range(1)
Proof psi
Burst psi
20, 26, 27
21, 24, 31
50
22
32
Vacuum
-30" Hg
-760mm Hg
-100 kPa
500
1000
0.3-0.7
1.5-3.0
0.5-2.2
0.4-1.5
2.1-4.2
Compound
-15" H2O/
-375mm H2O/
-3.7 kPa/
20
35
0.15-.75/
1.5-2.5/
0.45-2.0/
0.5-1.2/
2.1-3.5/
15" H2O
375mm H2O
3.7 kPa
0.15-.75
1.5-2.5
0.45-2.0
0.5-1.2
2.1-3.5
-30" H2O/
-760mm H2O/
-7.5 kPa/
20
35
0.30-.60/
1.5-2.5/
0.45-2.0/
0.5-1.5/
2.1-3.5/
30" H2O
760mm H2O
7.5 kPa
0.30-.60
1.5-2.5
0.45-2.0
0.5-1.5
2.1-3.5
-30" Hg/
-760mm Hg/
-100 kPa/
0.5-1.0/
2.0-3.0/
0.75-2.5/
0.7-1.8/
2.8-4.2/
15 psi
1.0 kg/cm2
100 kPa
500
1000
0.3-0.7
0.5-1.5
0 .5-1.0
0.7-1.4
0.7-2.1
-30" Hg/
-760mm Hg/
-100 kPa/
1.0-1.5/
3.0-6.0/
1.2-4.5/
1.4-2.4
4.2-8.4/
30 psi
2.0 kg/cm2
200 kPa
500
1000
0.3-0.8
1.0-2.0
0.7-1.5
0.4-1.3
1.4-2.8
-30" Hg/
-760mm Hg/
-100 kPa/
2.0-3.0/
5.0-9.0/
2.5-7.0/
2.8-4.5
7.0-12.0/
60 psi
4.0 kg/cm2
400 kPa
500
1000
0.7-1.5
3.0-5.0
1.1-4.0
1.0-2.3
4.2-7.0
Pressure
10" H2O
250mm H2O
2.5 kPa
20
35
0.2-0.5
1.0-2.0
0.35-1.5
0.4-1.0
1.4-2.8
30" H2O
750mm H2O
7.5 kPa
20
35
0.3-0.6
1.5-2.5
0.45-2.0
0.5-2.0
2.1-3.5
60" H2O
1500mm H2O
15 kPa
20
35
0.5-1.3
1.5-3.5
0.9-2.5
0.7-3.0
2.1-5.0
100" H2O
2500mm H2O
25 kPa
20
35
0.6-1.6
2.5-5.5
1.1-4.0
1.0-4.0
3.5-7.7
150" H2O
3750mm H2O
37 kPa
20
35
1.0-2.5
4.5-8.5
1.7-6.5
2.0-6.0
6.0-12.0
15 psi
1.0 kg/cm2
100 kPa
2400
3000
0.1-0.35
0.5-1.5
0.2-1.0
0.4-1.0
0.7-2.1
30 psi
2.0 kg/cm2
200 kPa
2400
3000
0.1-0.50
0.5-1.5
0.3-1.0
0.4-1.0
0.7-2.1
60 psi
4.0 kg/cm2
400 kPa
2400
3000
0.3-1.0
1.0-3.5
0.7-2.5
0.6-2.0
1.4-5.0
100 psi
7.0 kg/cm2
700 kPa
2400
3000
0.5-1.7
1.5-5.0
1.1-3.5
1.0-4.5
2.1-7.0
200 psi
14 kg/cm2
1400 kPa
2400
3000
1-3
5-13
2-9
3.0-7.5
7.0-18.2
400 psi
28 kg/cm2
2800 kPa
2400
3000
4-7.5
5-24
5.5-15
4.0-11.0
7.0-33.6
600 psi
42 kg/cm2
4200 kPa
2400
3000
4-11
9-30
7-20
5.0-23.0
12.6-42
1000 psi
70 kg/cm2
7000 kPa
12000
18000
7-30
30-110
18-70
15-80
42-154
3000 psi
210 kg/cm2
2100 kPa
12000
18000
15-60
80-235
37-160
30.0-230
112-329
DIFFERENTIAL PRESSURE SWITCHES
Pressure Ratings
Approximate Deadband(2) Switch Element
Nominal Range(1)
Static Work­ing Pressure
Proof psi
20, 26, 27
21, 24, 31
50
22
32
30" H2O 60" H2O 100" H2O 150" H2O
750mm H2O 1500mm H2O 2500mm H2O 3750mm H2O
7.5 kPa
15 kPa
25 kPa 37 kPa
5.4 5.4 5.4 5.4
21.6
21.6 21.6
21.6
0.3-0.6 0.5-1.3 0.6-1.6
1.0-2.5
1.5-2.5 1.5-3.5 2.5-5.5 4.5-8.5
0.45-2.0 0.9-2.5 1.1-4.0 1.8-6.5
0.5-2.0 0.7-3.0 1.0-4.0 2.0-6.0
2.1-3.5 2.1-5.0
3.5-7.7 6.3-12.0
15 psid
1.0 kg/cm2
100 kPa
500
2000
0.5-1.0
2.0-5.0
0.7-3.5
0.7-1.4
2.8-7.0
30 psid 60 psid
2.0 kg/cm2 4.0 kg/cm2
200 kPa
400 kPa
500 500
2000 2000
1.0-2.0 2.0-4.0
2.0-5.0 3.0-6.0
1.5-3.5 3.0-4.5
1.4-2.8 2.8-5.6
2.8-7.0 4.2-8.5
100 psid 200 psid 400 psid
7.0 kg/cm2 14.0 kg/cm2 28.0 kg/cm2
700 kPa 1400 kPa 2800 kPa
1000 1000 1000
4000 4000 8000
4.0-10.0 5.0-15.0
10.0-20.0
11.0-20.0
12.0-40.0 20.0-60.0
7.0-15.0 10.0-26.0 15.0-40.0
6.0-14.0
7.0-21.0 14.0-28.0
16.0-28.0 17.0-56.0 28.0-84.0
600 psid
42 0 kg/cm2
4200 kPa
1000
8000
20.0-40.0
80.0-150.0
30.0-115.0
30.0-56.0
112.0-210.0
Values shown are for zero static working pressure.
NOTES:
1 Switches may generally be set between 15% and 100% of nominal range on increasing pressure. Consult factory for
applications where setpoints must be lower.
Viton: Multiply Buna N value by 1.4
Teflon: Multiply Buna N value by 1.2
Stainless Steel: Multiply Buna N value by 1.7 Monel: Multiply Buna N value by 1.7
Dual Switch Element: Multiply single switch element value by 1.6 for approximate deadband.
2 All deadbands are given in English units as shown in the nominal range column. Deadbands shown are for switches with Buna N diaphragm. Approximate dead-bands for optional diaphragms:
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