Mechanical Alternators, Types A and C

Class 9038 / Refer to Catalog 9034CT9701

Type A, Open Tank

Type AG1

Mechanical Alternator, Float Operated

Type A Dimensions, in. (mm)

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

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

Alternators are designed to provide motor alternation in the operation of two motors.

Class 9038 Type A

Application	Description	NEMA 1	NEMA 4	NEMA 7 and 9
Application	Description	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 Accessories for Float Switches. Type AW and AR alternators must use center hole floats.

Operating Forces—Types AG, AR and AW

Type	Without Compensating Spring (No Form C)		With Compensating Spring (Form C)
	Without Compensating Spring (No Form C)		Maximum Weight of Rod and Stops Supported	Length of Rod Supported at the Maximum Adjustment
	Force Up^[1]	Force Down	Note: AW1 and AR1 have compensating spring standard.	Brass ^[2]	Stainless Steel ^[2]	Aluminum ^[2]
AG1 (min. lever ext.)	18 oz	20 oz	47 oz.	10 ft	12 ft	25 ft
AG1 (max. lever ext.)	16	17	41	8	10	21
AG1 Form R (min. lever ext.)	14	16	33	7	8	17
AG1 Form R (max. lever ext.)	11	12	30	6	7	15
AR1, AW1 (standard lever)	—	—	74	16	20	41
AR1, Form R, AW1 Form R (std. lever)	—	—	85	19	23	47

Type C, Closed Tank, with Bushing

Type CG36
Float on left

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.

Class 9038 Type C

Float Position Viewed from Front of Switch Facing Indicator Scale	R in. (mm)	Approx. Water Level Change		NEMA Type 1	NEMA Type 4	NEMA Type 7, 9
	R in. (mm)	Min. (in.)	Max. (in.)	Catalog No.	Catalog No.	Catalog No.
Right	7 (178)	6.5 (165)	13 (330)	9038CG31	9038CW31	9038CR31
Left	7 (178)	6.5 (165)	13 (330)	9038CG32	9038CW32	9038CR32
Right	4.25 (108)	4 (102)	7.75 (197)	9038CG33	9038CW33	9038CR33
Left	4.25 (108)	4 (102)	7.75 (197)	9038CG34	9038CW34	9038CR34
Right	5 (127)	4.75 (121)	9.25 (235)	9038CG35	—	—
Left	5 (127)	4.75 (121)	9.25 (235)	9038CG36	9038CW36	9038CR36

Type C Float Travel Adjustments

R in. (mm)	A in. (mm)		B in. (mm)		C in. (mm)		D in. (mm)		F in. (mm)
R in. (mm)	Min.	Max.	Min.	Max.	Min.	Max.	Min.	Max.	Min.	Max.
7 (178) ^[3]	2.5 (64)	5 (127)	5 (127)	7 (178)	2 (51)	4 (102)	5 (152)	7 (178)	10 (254)	14 (495)
5 (127) ^[4]	2.25 (57)	3.75 (95)	4 (102)	5.25 (133)	2.75 (70)	3 (76)	4 (102)	5.25 (133)	8 (203)	10.5 (267)
4.25 (108) ^[5]	2 (51)	3.5 (89)	3.5 (89)	4.75 (121)	2.5 (64)	3.75 (95)	3.5 (89)	4.75 (121)	7 (178)	9.5 (241)

Type A Dimensions, in. (mm)	Type CG Dimensions

Replacement Float: 9049HF page 22-28

Section 22: Pressure, Vacuum, and Float Switches