Submittal Sheet

B-Series Switches – Pressure, Differential Pressure,
Temperature & Hydraulic
BULLETIN SW10
Ashcroft Inc., 250 East Main Street, Stratford, CT 06614 USA
Tel: [phone] • Fax: [phone]
email: [e-mail] • www.ashcroft.com
All specifications are subject to change without notice.
All sales subject to standard terms and conditions.
© Ashcroft Inc. 2007 10/08
STANDARD TEMPERATURE RANGE SELECTION
Maximum
Nominal Range
(1)
Temperature
Approximate Deadband
(1)
Switch Element
°F °C °F 20, 26, 27 21, 24, 31 50 22 32, 42
–40 to 60 –40 to 160 400 1.0-2.0 3.0-8.0 1.5-5.5 1.4-6.0 8.0-16.0
0 to 100 –20 to 400 400 1.5-3.0 5.0-12.0 2.2-8.5 1.5-7.5 9.0-20.0
75 to 205 20 to 95 400 1.5-3.5 8.0-16.0 2.5-12.0 2.0-9.0 10.0-24.0
150 to 260 65 to 125 400 1.5-3.0 5.0-12.0 2.2-8.5 2.0-9.0 10.0-24.0
235 to 375 110 to 190 500 1.5-3.5 5.0-12.0 2.5-8.5 2.0-9.0 10.0-24.0
350 to 525
(3)
175 to 275 700 2.0-4.5 8.0-16.0 3.2-12.0 2.5-10.0 15.0-34.0
500 to 750
(2)
260 to 400 900 4.0-8.0 16.0-30.0 7.2-24.0 5.0-23.0 30.0-50.0
1 All deadbands given in °F.
2 Available with remote mount thermal systems only.
3 Not available with 2
3
⁄4˝ stem.
NOTES:
4 Dual switch element multiply single switch element value by 1.6 for
approximate deadband.
5 Set and reset points must fall within the adjustable range.
Temperature Switches
B-Series temperature switches feature
a SAMA Class II v
apor pressure thermal
system. This system provides quick,
accurate response to process tempera-
ture changes with negligible ambient
temperature effects. This is inherent in
the design due to the precise relation-
ship that exists between temperature and
pressure according to the vapor pressure
laws. A wide selection of sensing bulb
and armored capillary lengths is avail-
able. The vapor pressure system design
features small bulb sizes, making instal-
lation easy and cost-effective.
All models feature ±1.0% percent of
span setpoint repeatability with very high
overtemperature ratings.
These standard designs perform well
in applications where shock and vibra-
tion could be a problem and should be
used with Ashcroft thermowells for bulb
protection and ease of installation and
maintenance.