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B74-1B20-BKQ 参数 Datasheet PDF下载

B74-1B20-BKQ图片预览
型号: B74-1B20-BKQ
PDF下载: 下载PDF文件 查看货源
内容描述: 外部笼浮筒触动液位开关 [External Cage Displacer Actuated Liquid Level Switches]
分类和应用: 开关
文件页数/大小: 16 页 / 410 K
品牌: MAGNETROL [ MAGNETROL INTERNATIONAL, INC. ]
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OPTIONS
Special levels/body extensions
316/304 SS chambers
NACE
Gold switch contacts
Interface (except B74)
Vent and drain connections
TECHNOLOGY
The weight of the displacer
Œ
is supported by the spring
.
allowing the spring to compress. The attraction sleeve
Ž,
attached to the spring, moves upward into the field of a
Rising liquid level imparts buoyancy forces on the displacer
3
6
5
4
5
4
6
3
permanent magnet
.
Magnet motion causes the switch

to actuate. A non-magnetic barrier tube
‘
provides a static
pressure boundary between the switch mechanism and the
2
displacer assembly.
1
1
SPECIFICATIONS
SWITCH
MECHANISMS
AND
ENCLOSURES
SERIES J & K PNEUMATIC SWITCHES
Suited for applications where
electrical power is not available
Bleed and non-bleed designs
Process temperatures
to +400° F (+204° C)
SERIES F, HS, H1 & 8 HERMETICALLY SEALED SWITCHES
Ideal for use in salt and other
corrosive atmospheres
Series “HS” and “H1” are positively
pressurized capsules for entire
mechanism and contacts
Process temperatures
to +750° F (+399° C)
SERIES B, C & D DRY CONTACT SWITCHES
Designed for AC and DC
current applications
Series C for process temperatures
to +450° F (+232° C)
SWITCH ENCLOSURES
TYPE 4X/7/9 aluminum enclosures
Designed to meet Class I, Div. 1,
Groups C & D and Class I, Div. 1
Group B
Optional housing heaters and drains
available for some enclosures
Pneumatic switch mechanisms
available with a NEMA 1 enclosure
BASIC ELECTRICAL RATINGS
Voltage
120 VAC
240 VAC
24 VDC
120 VDC
240 VDC
B
15.00
15.00
6.00
0.50
0.25
Switch Series and Non-Inductive Ampere Rating
C
D
F
HS
H1
15.00
15.00
10.00
1.00
0.50
10.00
10.00
10.00
3.00
0.25
4.00
0.30
5.00
5.00
5.00
0.50
0.25
1.00
1.00
1.00
0.40
8
1.00
3.00
2