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Product Usage Service Operation Reset Type
Pressure
Ranges,
psi
Pressure
Ranges,
inches wc
Differential Approvals Pipe
Ambient
Temperature
Enclosure
Type
Contact Ratings
L91A
Modulating
pressure control
(motor or valve)
Steam, Air,
Noncombustible gases,
Noncorrosive liquids
(1) Pressure proportioning, 135 ohm
(Series 90 Mod Motor or V9055)
Not Applicable
0-15,
5-150,
10-300
Non-adjustable
Not
Applicable
1/4" – 18
NPT
b
32˚ to 150˚ F NEMA 1
24Vdc / 24Vac
Control Circuit
L91B
Adjustable throttle
L91D
(2) Pressure proportioning, 135 ohm
(Series 90 Mod Motor or V9055)
L404F
High-limit control
or On/off control
with Alarm contacts
Steam, Air,
Noncombustible gases,
Noncorrosive liquids
(1) SPDT Break/Make on rise or
(1) SPST Break on rise
a
Auto recycle
1-8, 2-15,
5-50,
10-150,
20-300
Adjustable
subtractive
differential
CSA, UL
1/4" – 18
NPT
b
Maximum
150˚ F
NEMA 1
120Vac: 8FLA, 48LRA
240Vac: 5FLA, 30LRA
L404V
Low-limit control
or On/off control
Oil
(1) SPST Make on rise
a
5-50,
10-150
L404T
High-limit control
or On/off control
(1) SPST Break on rise
a
L4079A
High-limit
control
Steam, Air,
Noncombustible gases,
Noncorrosive liquids
(2) SPST Break on rise
Manual reset
2-15,
10-150
Not Applicable CSA, UL
1/4" – 18
NPT
Maximum
150˚ F
NEMA 1
120Vac: 9FLA, 58LRA
240Vac: 5FLA, 29LRA
L4079B
(1) SPST Break on rise
2-15,
5-50,
10-150,
20-300
L4079W
Oil 10-150
P7810C
High-limit control +
Steam, Air,
Noncombustible gases,
Noncorrosive liquids
(2) SPST Break on rise +
(1) Alarm contacts +
Manual reset
0-15,
0-150,
0-300
Non-adjustable
CSA, UL,
FM,
CSD-1, FCC
1/2" – 14
NPT
32˚ to 140˚ F NEMA 1
120Vac, 50/60 Hz
9.8FLA, 58.8LRA
On/off control + Auto recycle Adjustable subtractive
Modulating
pressure control
(motor or valve)
(1) Pressure proportioning, 4-20 mA Not Applicable Adjustable throttle
L408J
High-limit control
or On/off control
with Alarm contacts
Vapor Heating
or Liquid, Air,
Noncombustible
gases, Ammonia,
Oxygen, Distilled water
(1) SPDT Break/Make on rise
Auto recycle
0-16 oz/in
2
,
0-4 psi
Adjustable
subtractive
differential
CSA, UL
1/4" – 18
NPT
-35˚ to 150˚ F NEMA 1
120Vac: 8FLA, 48LRA
240Vac: 5FLA, 30LRA
L408J
Low-limit control
or On/off control
(1) SPST Make on rise
a
C6097A
Gas pressure
switch;
Safety limit with
Alarm contacts
Natural gas,
LP gas, Nitrogen, Air
(1) SPDT Break/Make on fall
Manual reset or
Auto recycle
1.5-7
0.4-5, 3-21,
12-60
Fixed additive
or subtractive
differential
CSA, UL,
FM,
CSD-1, IRI
Flange or
1/4" – 18 NPT
-40˚ to 140˚ F IP54
120Vac: 3FLA, 18LRA
240Vac: 3FLA, 18LRA
C6097B
(1) SPDT Break/Make on rise 3-21, 12-60
C437D
Industrial gas
pressure switch;
Safety limit
Natural gas,
LP gas, Nitrogen, Air
(1) SPST Break on rise
Manual reset
0.5-5,
1-10
1-26 Fixed subtractive
CSA, UL,
FM
1/2" – 14,
1/8" – 27 NPT
32˚ to 125˚ F NEMA 1
120Vac: 8FLA, 48LRA
240Vac: 5FLA, 30LRA
C437E
(1) SPST Break on fall 0.5-5.5, 1-26 Fixed additive