Magnetrol STI R Series, Installation And Operating Manual

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6.0 Switch and Housing Model Codes
The mechanical level switches are identified by a ten digit alphanumeric model numbering system.
The eighth, ninth and tenth digit combinations (called switch and housing codes) are used to identify
the type and number of switches, number of contacts, switch magnet strength as well as housing type,
size and options. The switch and housing codes for the 'R' Series switches are below.
example model number:
R K B
Switch
Description
Process
Temperature
Range °F (°C)
Contacts
Number of
Switches
Housing
Height
Cast Aluminum
NEMA 4X NEMA 4X/7/9 Cl I Div 1 Grp B ATEX
1" NPT 1" NPT 1" NPT 1" NPT M20
Series 'R'
High Temperature
Snap Switch
-40° to +750° F
➀
(-40 to +399° C)
SPDT
1 Short R1Q RKQ RKS RA9 RH9
1 Tall R1B RKB RKK RC9 RK9
2 Tall R3B RLB RLK RD9 RL9
Grp IV SPDT 1 Tall R5B RYB RYK RW9 RY9
Switch Mechanisms with Cast Aluminum Housings
Switch
Description
Process
Temperature
Range °F (°C)
Contacts
Number of
Switches
Housing
Height
CS/Alum Cast Iron
NEMA 4X NEMA 4X/7/9 Cl I Div 1 Grp B ATEX
3 ⁄
4
" NPT 1" NPT 1" NPT 3 ⁄
4
" NPT M20
Series 'R'
High Temperature
Snap Switch
-40° to +1000° F
(-40 to +538° C)
SPDT
1 Short R1Y RKY n/a n/a n/a
1 Tall R1M RKM RKW RU5 RK5
2 Tall R3M RLM RLW RV5 RL5
Grp IV SPDT 1 Tall R5M RWM RWW RW5 RY5
Switch Mechanisms with Carbon Steel and Cast Iron Housings
8 42-799 Series ‘R’ Electric Switch Mechanisms
Cover
Height
Housing Material NEMA 1 NEMA 4X
NEMA
4X/7/9
NEMA 7/9 Group B
NEMA
4X/7/9
with drain
NEMA 7/9
with drain
Short
CS cover, aluminum base 89-6511-003* 89-6509-003* N/A
N/A
N/A
N/A
Cast aluminum
N/A
89-6582-023 89-6582-023 89-6582-032 89-6582-028
Cast Iron N/A 89-6582-002 N/A 89-6582-003
Tall
CS cover, aluminum base 89-6512-003* 89-6510-003* N/A
N/A
N/A
N/A
Cast aluminum
N/A
89-6582-024 89-6582-024 89-6582-033 89-6582-029
Cast Iron N/A 89-6582-005 89-6582-008 N/A 89-6582-006
5.4 Replacement Housing Kits
Housing Material
Enclosure
Type
Gasket O-ring
Baffle
Plate*
Cover
Hardware
CS cover, aluminum base NEMA 4X N/A N/A 36-5303-001 89-6508-001
Cast aluminum
NEMA 4X
12-2201-253
12-2201-116 05-6657-001 N/A
NEMA 4X/7/9
Group B
Cast iron
NEMA 7/9
12-2201-249 7/9 w/drain
All
5.5 Replacement Gaskets and Hardware
*
For models with manual reset options, see page 20 for parts
➀
Cast aluminum enclosures may be used for process temperatures up to +1000° F (+538° C) only in non-hazardous areas.