Dwyer 500系列插入式液位控制

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Dwyer 500系列插入式液位控制

可调死区结合直接2-1/2"螺纹或2-1/2"法兰安装,使可靠,重型500系列理想的液位控制在大或小的储罐。可提供铸铁,铸钢或铸造316不锈钢,以满足最苛刻的应用。浮子棒可从标准6英寸(152.4毫米)到24英寸(610毫米)长,提供的作用下的比重为0.55。2-1/2"(64 Mm)浮子适用于400 psig(28 Bar),2-1/2"x4"(64 X 102 Mm)浮子适用于200 psig(14 Bar)。最高工作温度为425°F(218°C)。包括SPST、SPDT或DPDT在内的各种电路都可以通过密封的止动作或水银触点进行排序。单极,双掷电独立电路,以及接触高或低直流电流应用。有各种各样的外壳可供选择,如通用的、耐候的、防爆的或防爆的/防蒸汽的。

选型表

EXAMPLE500TWT7810
C5560
500T-WT-7810-C-55-6-0 Liquid Level Control, NEMA 4X weatherproof enclosure, 2-1/2” NPT cast steel threaded chamber for direct tank mounting, SPDT snap action switch, fixed deadband, automatic reset, operating pressure 200psi (14 bar) to 425°F (218°C), minimum specific gravity 0.55 with 6” (152mm) float rod and 2-1/2” x 4” (64mm x 102mm) float.
CONSTRUCTION500T







NPT threaded process connection
500F







Flanged direct mount process connection
ENCLOSURE
G






General purpose, NEMA 1

WT






Watertight NEMA 4, 4X

E






Explosion-proof, NEMA 7, 9

EV






Explosion-proof, vapor-proof, NEMA 7, 9
CIRCUITS
(for electrical circuits,
See charts A & B below)


XXXXXX




Snap action or mercury switch, see chart A and B below.


78XXHM





Hermetically sealed snap switch, see chart B below or consult factory.
CHAMBER MATERIAL



C



Cast iron




C216



Cast 316SS




C217



Cast 316SS with shielded armature
MINIMUM SPECIFIC
GRAVITY





80


0.80 specific gravity, 2-1/2” diameter round float





70


0.70 specific gravity, 2-1/2” x 4” float (2 stage only)





55


0.55 specific gravity, 2-1/2” x 4” float
ROD LENGTH





6

6” 316SS (Standard)






12

12” 316SS






18

18” 316SS






24

24” 316SS
FLANGE






0
No flange







2
2-1/2” 125# cast iron







3
3” 125# cast iron







4
4” 125# cast iron







5
6” 125# cast iron







6
2-1/2” 150# forged steel







7
3” 150# forged steel







8
4” 150# forged steel







9
6” 150# forged steel







10
2-1/2” 300# forged steel







11
3” 300# forged steel







6S
2-1/2” 150# 316SS







7S
3” 150# 316SS







8S
4” 150# 316SS
OPTIONS







HFHeat fins








RManual reset for single stage








R1Manual reset for lower stage of 2-stage controls








STWStainless steel tag wired








01Breather only (E-Housing only)








02Drain only (E-Housing only)








12Breather and drain (E-Housing only)








23720Fungus proofing special 23720


表A & B - 电路和额定值

SWITCH TYPE
SWITCH ACTION
ELECTRICAL RATINGS IN AMPS
ORDERING CODE

AC
DC
SINGLE STAGE
TWO STAGE
120V
240V
440V
30V
125V
250V
LOWER
UPPER
CHART A
Mercury Contacts
SP-ST open on level FALL
10
5
3†

10
5
-4820
-4820
-20
UL
SP-ST open on level RISE
10
5
3†

10
5
-4821
-4821
-21
UL
SP-DT one switch
4
2
1†

4
2
-4810
-4810
-10
UL
SP-DT two switches E.I.*
10
5
3†

10
5
-4815
-4815
-15
UL
DP-ST two switches E.I.* open on level FALL
10
5
3†

10
5
-4814
-4814
-14
UL
DP-ST two switches E.I.* open on level RISE
10
5
3†

10
5
-4813
-4813
-4813
UL
DP-DT two SP-DT switches
4
2
1†

4
2
-4806
-4806
-06
UL
CHART B
snap action contacts
SP-DT one switch
12
5
3†

0.5**
0.25**
-7810
-7810
-10
UL
DP-DT Two SP-DT switches
12
5
3†

0.5**
0.25**
-7806
-7806
-06
UL
SP-DT one hermetically sealed switch
5
5

5**


-7810HM
-7810HM
-10HM

DP-DT two hermetically sealed SP-DT switches
5
5

5**


-7806HM
-7806HM
-06HM

DP-DT two SP-DT switches
10
3


10‡
3‡
-9806
-9806
-06

SP-DT one switch
10
3


10‡
3‡
-9810
-9810
-10

†Available on special order, change 1st digit in ordering code from 4 to 5 or 7 to 8, i.e., -4820 becomes -5820, -7810 becomes -8810, etc.
‡10 amp inductive (polarized) at 125 VDC.
*Electrically Independent.
**Resistive.



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