Ametek Magnetrol B74 - Page 25

46-635 External Cage Displacer Actuated Liquid Level Switches
25
4.5 Model Numbers
4
.5.1 Standard Pressure (continued)
ELECTRIC SWITCH MECHANISM AND ENCLOSURE ➁
PNEUMATIC SWITCH MECHANISM AND ENCLOSURE
➀ Consult factory for temperatures up to +750 °F (+399 °C).
➁ Maximum temperature rating +200 °F (+93 °C) with type 316 SS spring.
➂ Consult factory for TYPE 4X/7/9 cast iron housings.
➃ Uncontrolled housing heater or drain available in TYPE 4X/7/9 enclosures.
Consult factory for switch codes.
➄ Process temperature based on +100 °F (+38 °C) ambient.
≈ HS switch not available on 600# C74 model with materials of construction
code –2.
∆ On condensing applications, temperature down-rated to +400 °F (204 °C)
process at +100 °F (+38 °C) ambient.
« CSA approval does not apply to Series HE switches.
Switch Description ➃
Maximum Process ➄
Temperature °F ( °C)
One
Set Point
TYPE 4X/7/9 Aluminum Enclosure
Class I, Div. 1,
Groups C & D
Class I, Div. 1,
Group B
ATEX
Ex II 2G
EEx d IIC T6
Series B Snap Switch
250
(121)
SPDT
DPDT
BKQ
BNQ
BKS
BNS
BA9
BB9
Series C Snap Switch
450
(232)
SPDT
DPDT
CKQ
CNQ
CKS
CNS
CA9
CB9
Series D Snap Switch for
DC Current Application
250
(121)
SPDT
DPDT
DKQ
DNQ
DKS
DNS
DA9
DB9
Series F Hermetically Sealed
Snap Switch
500
(260)
SPDT
DPDT
FKQ
FNQ
FKS
FNS
FA9
FB9
Series HS 5 Amp Hermetically ≈
Sealed Snap Switch w/Wiring Leads
500
(260)
SPDT
DPDT
HMC
HMF
HEK
HET
N/A
Series HS 5 Amp Hermetically ≈
Sealed Snap Switch w/Terminal Block
500
(260)
SPDT
DPDT
HM3
HM7
HM4
HM8
HA9
HB9
Series 8 Hermetically Sealed
Snap Switch
500
(260)
SPDT
DPDT
8KQ
8NQ
8KS
8NS
8A9
8B9
∆
∆
«
«
Maximum Maximum Bleed NEMA 1
Switch Supply Process Orifice
B74,C74-1,
Description Pressure Temperature Diameter 300# C74-2 H13, H15 600# C74-2
100 psig .063
JDE JKE JKE
Series J (7 bar) +
400 °F
(1.6 mm)
Bleed Type 60 psig
(+204 °C)
.094
JEE JLE JLE
(4 bar) (2.4 mm)
Series k 100 psig +400 °F
— KOE KOE KPE
Non-Bleed (7 bar) (+204 °C)