B-Series Switches – Pressure, Differential Pressure,
Temperature & Hydraulic
BULLETIN SW10
Ashcroft Inc., 250 East Main Street, Stratford, CT 06614 USA
Tel: 203-378-8281 • Fax: 203-385-0408
email: [email protected] • www.ashcroft.com
All specifications are subject to change without notice.
All sales subject to standard terms and conditions.
© Ashcroft Inc. 2007 10/08
Pressure & Differential Pressure Switches
B-Series pressure, differential pressure and
vacuum switches use two different actuators
depending on setpoint require-ments. For set-
points 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
H
2
O, 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 appli-
cations 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.
Overpressure Ratings
Approximate Deadband
(2)
Switch Element
Nominal Range
(1)
Proof psi
Burst psi
20, 26, 27
21, 24, 31
50
22
32, 42
Vacuum
–30˝ Hg
–760mm Hg
-100 kPa
250
400
0.3-0.7
1.5-3.0
0.5-2.2
0.4-1.5
2.1-4.2
Compound
–15˝ H
2
O/
–375mm H
2
O/
–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˝ H
2
O
375mm H
2
O
3.7 kPa
0.15-.75
1.5-2.5
0.45-2.0
0.5-1.2
2.1-3.5
–30˝ H
2
O/
–760mm H
2
O/
–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˝ H
2
O
760mm H
2
O
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/cm
2
100 kPa
250
400
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/cm
2
200 kPa
250
400
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/cm
2
400 kPa
250
400
0.7-1.5
3.0-5.0
1.1-4.0
1.0-2.3
4.2-7.0
Pressure
10˝ H
2
O
250mm H
2
O
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˝ H
2
O
750mm H
2
O
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˝ H
2
O
1500mm H
2
O
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˝ H
2
O
2500mm H
2
O
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˝ H
2
O
3750mm H
2
O
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/cm
2
100 kPa
500
1500
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/cm
2
200 kPa
500
1500
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/cm
2
400 kPa
500
1500
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/cm
2
700 kPa
1000
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/cm
2
1400 kPa
1000
3000
1-3
5-13
2-9
3.0-7.5
7.0-18.2
400 psi
28 kg/cm
2
2800 kPa
2400
3000
4-7.5
5-24
5.5-15
4.0-11.0
7.0-33.6
600 psi
42 kg/cm
2
4200 kPa
2400
3000
4-11
9-30
7-20
5.0-23.0
12.6-42
1000 psi
70 kg/cm
2
7000 kPa
12000
18000
7-30
30-110
18-70
15-80
42-154
3000 psi
210 kg/cm
2
2100 kPa
12000
18000
15-60
80-235
37-160
30.0-230
112-329
PRESSURE/VACUUM SWITCHES
DIFFERENTIAL PRESSURE SWITCHES
Pressure Ratings
Approximate Deadband
(2)
Switch Element
Static Work-
Nominal Range
(1)
ing Pressure
Proof psi
20, 26, 27
21, 24, 31
50
22
32, 42
30˝ H
2
O
750mm H
2
O
7.5 kPa
5.4
21.6
0.3-0.6
1.5-2.5
0.45-2.0
0.5-2.0
2.1-3.5
60˝ H
2
O
1500mm H
2
O
15 kPa
5.4
21.6
0.5-1.3
1.5-3.5
0.9-2.5
0.7-3.0
2.1-5.0
100˝ H
2
O
2500mm H
2
O
25 kPa
5.4
21.6
0.6-1.6
2.5-5.5
1.1-4.0
1.0-4.0
3.5-7.7
150˝ H
2
O
3750mm H
2
O
37 kPa
5.4
21.6
1.0-2.5
4.5-8.5
1.8-6.5
2.0-6.0
6.3-12.0
15 psid
1.0 kg/cm
2
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
2.0 kg/cm
2
200 kPa
500
2000
1.0-2.0
2.0-5.0
1.5-3.5
1.4-2.8
2.8-7.0
60 psid
4.0 kg/cm
2
400 kPa
500
2000
2.0-4.0
3.0-6.0
3.0-4.5
2.8-5.6
4.2-8.5
100 psid
7.0 kg/cm
2
700 kPa
1000
4000
4.0-10.0
11.0-20.0
7.0-15.0
6.0-14.0
16.0-28.0
200 psid
14.0 kg/cm
2
1400 kPa
1000
4000
5.0-15.0
12.0-40.0
10.0-26.0
7.0-21.0
17.0-56.0
400 psid
28.0 kg/cm
2
2800 kPa
1000
8000
10.0-20.0
20.0-60.0
15.0-40.0
14.0-28.0
28.0-84.0
600 psid
42 0 kg/cm
2
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.
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 deadbands for optional diaphragms:
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.
Содержание BN 5-12 Series
Страница 13: ...TAB 1 DEVICE DATA SHEETS ...
Страница 18: ...TAB 2 APPROVED SUBMITTAL ...
Страница 23: ...All data subject to change without notice 1 800 ASK 4WEG www weg net 14 ...
Страница 26: ...Your advantages our pumps ...
Страница 45: ...ADV 2 13E And what can we get flowing for you Your nearest contact Or visit www seepex com ...
Страница 117: ...TAB 3 INSTALLATION OPERATIONS AND MAINTENANCE ...
Страница 133: ...Page 37 ...
Страница 233: ...www weg net Manual of Electric Motors 64 ENGLISH Figure 2 1 IEC motor nameplate Page 135 ...
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Страница 306: ...TAB 4 AS BUILTS AND SUPPLEMENTAL INFORMATION ...
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Страница 308: ...R Page 30 ...