SE Digest 178

Float Switches

Mechanical Alternators, Types A and C Class 9038 / Refer to Catalog 9034CT9701

22 PRESSURE, VACUUM, AND FLOAT

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Type A, Open Tank

Alternators are designed to provide motor alternation in the operation of two motors. Table 22.99: Class 9038 Type A Application Description NEMA1 NEMA4 NEMA7and9 Catalog No. Catalog No. Catalog No. For open tank or sump systems using duplex pumps Mechanical alternator float operated 9038AG1 9038AW1 9038AR1 NOTE: For use with Class 9049 float accessories listed on page 22-34.

SWITCHES

Type AW and AR alternators must use center hole floats. Table 22.100: Operating Forces—Types AG, AR and AW

TypeAG1 Mechanical Alternator, Float Operated

1.06 26.92

4.69 119.13

6.88 174.75

3.63 92.2

With Compensating Spring (Form C)

Without Compensat ingSpring (NoFormC)

.5 to .75 12.7 to 19.05 (4) K.O.’s for

cond.

Length of Rod Supported at the Maximum Adjustment

Maximum Weight of Rod and Stops Supported Note: AW1 and AR1 have compensating spring standard.

1.125 28.58

Type

pos1

4.50 114.3

pos 2

Stain less Steel [9]

Alumi num [9]

Force Up [8]

Brass [9]

Force Down

pos 3

3.0 76.2 1.75 44.45

dia. mtg holes

1.47 37.34

(4) .093 2.36

AG1 (min. lever ext.) AG1 (max. lever ext.)

0.75 19.05

5.38 136.5

1.25 31.7

3.5 to 4.19 88.9 to 106.4

18oz 20oz

47oz.

10 ft

12 ft

25 ft

.84 21.34

16 17 14 16 11 12 — — — —

41 33 30 74 85

8 7 6

10

21 17 15 41 47

Type A Dimensions, in. (mm)

AG1 Form R (min. lever ext.) AG1 Form R (max. lever ext.) AR1, AW1 (standard lever) AR1, Form R, AW1 Form R (std. lever)

8 7

16 19

20 23

File No. E12158 excludes NEMA 7 & 9 products (9038AR, CR, and DR)

File LR25490 excludes NEMA 7 & 9 products (9038AR, CR, and DR)

Type C, Closed Tank, with Bushing

Flange mounted with bushing for control of liquid level within a closed tank. Build up the switch to meet your requirements from the basic switch, rod kit, and float kit groups below. Type C switches are attached to the tank by means of a 2-1/2 in. screw-in bushing. An external pointer indicates the float position within the tank when the unit is mounted. Switches come complete with screw-in connector, stainless steel float and rod.

TypeCG36 Float on left

Table 22.101: Class 9038 Type C Float Position Viewed from Front of Switch Facing Indicator Scale R in. (mm)

Approx. Water Level Change

NEMA Type1

NEMA Type4

NEMA Type7, 9

Min. (in.) 6.5 (165) 6.5 (165)

Max. (in.) 13 (330) 13 (330) 7.75 (197) 7.75 (197) 9.25 (235) 9.25 (235)

Catalog No. 9038CG31 9038CG32 9038CG33 9038CG34 9038CG35 9038CG36

Catalog No. 9038CW31 9038CW32 9038CW33 9038CW34

Catalog No. 9038CR31 9038CR32 9038CR33 9038CR34

Right

7 (178) 7 (178)

Left

Right

4.25 (108) 4.25 (108)

4 (102) 4 (102)

Left

Right

5 (127) 5 (127)

4.75 (121) 4.75 (121)

—

—

Left

9038CW36

9038CR36

Table 22.102: Type C Float Travel Adjustments R in. (mm) A in. (mm)

B in. (mm)

C in. (mm)

D in. (mm)

F in. (mm)

Min.

Max.

Min.

Max.

Min. 2 (51)

Max.

Min.

Max.

Min.

Max.

7 (178) [10] 5 (127) [11]

2.5 (64) 2.25 (57)

5 (127)

5 (127) 4 (102) 3.5 (89)

7 (178)

4 (102)

5 (152) 4 (102) 3.5 (89)

7 (178)

10 (254) 8 (203) 7 (178)

14 (495)

3.75 (95) 3.5 (89)

5.25 (133) 4.75 (121)

2.75 (70) 2.5 (64)

3 (76)

5.25 (133) 4.75 (121)

10.5 (267) 9.5 (241)

4.25 (108) [12]

2 (51)

3.75 (95)

Type A Dimensions, in. (mm)

Type CG Dimensions

1.75 44

2.17 55

Combination knockouts, 0.5 in. (13 mm) and 0.75 in. (19 mm), both ends

1.97 50

2.5 64

R

6.5 165 max.

2.5 64

Pipe Tap

D

5.94 151

A

7.0 178

1.25 32

6.5 165 max.

3.42 87

F

0.88 22

6.84 174

2.59 66

C

0.44 11

0.44 11

Bushing

0.38 10

B

2.0 51

Across Flats

4.69 119

2.63 67

2.63 67

7.0 179

4.0 102

2.5 64

17.81 452

To reverse the float, change the operating link in the holes of the adjusting plate.

Replacement Float: 9049HF page 22-28

Add 2 oz for Form N5 High Water alarm.

[8]

[9] Rod length has been determined using the weight of the rod material furnished on Class 9049 accessories (3/8" O.D. tubing). Other types of rod should be weighed and compared to the Maximum Weight of Rod column in Table 22.100. [10] CG31, CG32, CW31, CW32, CR31, CR32 [11] CG35, CG36, CW35, CW36, CR35, CR36 [12] CG33, CG34, CW33, CW34, CR33, CR34

22-32

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8/17/2020