How to Guide

Commercial Pressure and Float Switches for Power Circuits
Float Switches—Class 9036, 9037, and 9038
63
03/2011
© 2011 Schneider Electric
All Rights Reserved
Class 9038 Type D Flange-Mounted Mechanical Alternators
Flange Mounted
Table 26 contains ordering information for Class 9038 Type D alternators, factory modifications, and
float kits. Order rod and float accessory kits separately. Contact the Sensor Competency Center when
using Class 9038 alternators in liquids with a different specific gravity than water (1.0).
When ordering a factory modification, add the Form number to the end of the alternator Type number.
For example, to select a 9038DG7 alternator with manual transfer, order 9038DG7N3.
Table 26: Class 9038 Type D Mechanical Alternators
Specifications
Application
Industrial closed tanks using duplex, condensate pumps
Top mounted only
Float movement Transmitted through a quad ring seal (occasional replacement may be necessary)
Tank Pressure Up to 50 psi
Media Temperature Viton
®
seal: up to 250 °F
Contact Operation Close on liquid rise or open on liquid rise (field reversible)
Float Travel
Determined by the length of the hinge post and rod and by the float position
For more information on float travel and position, see “Float Travel” on page 64.
Catalog Numbers
Hinge Post Length (V) in. (mm) 2.63 (67) 4.69 (119)
Water Level Change Minimum Maximum Minimum Maximum
NEMA 1 9038DG7 9038DG8 9038DG9 9038DG10
NEMA 4 9038DW7 9038DW8 9038DW9 9038DW10
NEMA 7, 9 9038DR7 9038DR8 9038DR9 9038DR10
Modifications
NOTE: Factory installed only.
Form
Two-level, non-alternating unit N4
High water alarm circuit (Type DG only) N5
Float Kits
Material
Diameter
in. (mm)
Length
in. (mm)
Catalog Number
#304 stainless steel 3.62 (92) 4.5 (114) 9049EF1
#316 stainless steel 3.62 (92) 4.5 (114) 9049EF2
NOTE: The following float kits are available but are not recommended for use with 9038D mechanical alternators.
The float travel dimensions shown in this catalog for 9038D devices do not apply when using these floats. A correction factor
appears in the footnote of Tables 27–30 on pages 64 and 66.
#304 stainless steel 2.5 (64) 7 (178) 9049HF3
#316 stainless steel 2.5 (64) 7 (178) 9049HF4
9038DG
9049ER5
9049EF1