Pilgrim Pressure Switches B-SERIES - Manual (Page 15)

ADDITIONAL PRESSURE AND TEMPERATURE SWITCH
APPLICATION INFORMATION
For other Ashcroft switch models request Ashcroft
Bulletin, Switch Quick Guide QG-3.
All product information pages mentioned in this
bulletin can be downloaded from our web site.
SWITCH ELEMENT SELECTION
B-Series switches are available with a wide
variety of snap acting switch elements to
meet most electrical requirements. The stan-
dard contact arrangement is single pole,
double throw (S.P.D.T.). This includes both
normally open and normally closed contacts.
Standard contact material is fine silver which
generally is suitable for switching 8 volts or
more, up to the rating in the Switch Element
Selection Table. When switching less than 8
volts, optional Gold Alloy contacts are
recommended.
Optional dual, or 2 S.P.D.T. contacts may be
supplied in B-Series enclosures for applica-
tions requiring two switch functions at the
same setpoint. These contacts are technical-
ly not double pole, double throw (D.P.D.T.).
They are synchronized at the factory to actu-
ate within 1% of nominal range of each
other. For simultaneous actuation of 2
S.P.D.T. contacts, option XG3 should be
ordered. Refer also to SW/PI-58 “Belleville
Actuator.”
HAZARDOUS LOCATIONS
a. Division I.
Ashcroft 700 series or other explosion
proof enclosures are required
to meet the require-
ments of Division I
Hazardous Loca-
tions as defined
by the National
Electrical Code.
b. Division II.
These enclosures
also meet the less
stringent require-
ments for Division II Hazardous Loca-
tions. Alternatively, Ashcroft 400 series
or other watertight enclosures with her-
metically sealed switch elements are
approved for use in Division II haz-
ardous locations.
c. Intrinsic Safety.
Ashcroft 400 and 700 series pressure
and temperature switches may be used
with approved barriers in most intrinsi-
cally safe systems. These switches do
not create or store energy and are there-
fore designated “simple devices’’ in
these systems.
d. ATEX Approval. (optional)
Ashcroft 700 series pressure and tem-
perature switches are approved for ATEX
directive 94/9/EC. This European direc-
tive is for equipment intended for use in
potentially explosive atmospheres. See
option XCN on page 10.
INFORMATION & GUIDELINES
FOR SETTING ASHCROFT PRESSURE,
TEMPERATURE AND DIFFERENTIAL
PRESSURE SWITCHES
All Ashcroft pressure, temperature and dif-
ferential pressure switches can be set at any
point between about 15% and 100% of the
range as designated on the label or the nom-
inal range table.
Ashcroft pressure and temperature switches
can be either set in the field or ordered from
the factory preset to your requirements.
When set at the factory, the specification is
±1% of the nominal range.
Factory setting, or XFS, is a very popular
option, and as a result, we often receive
orders that do not have enough information
or have incorrect information.
HOW TO ORDER
When “XFS” is desired:
1. Setpoint must be indicated.
2. Increasing or decreasing pressure must
be indicated.
Ex: B424B XFS 100#
Set: 60# decreasing
3. For differential pressure switches, static
operating pressure must also be specified.
15
ATEX option shown