SE Digest 178

Closed Tank, Type H

Float Switches

Class 9037 / Refer to Catalog 9034CT9701

www.se.com/us

Type H Switches Type H 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 stainless steel float and rod. A Buna N Quad-Ring ® seal is used between the float rod and sealing connector. Normal application is at atmospheric pressure, but where higher pressures are encountered, the switch will withstand tank pressures up to 50 psi at temperatures up to +220 °F. Occasional replacement of the Quad-Ring seal may be necessary. Ambient temperature ratings: Min. -30 °C (-22 °F); Max. +105 °C (+220 °F)

Table 22.96: Class 9037 Type H Contacts Close On Liquid Rise

SWITCHES

Approximate Water Level Change (Field Adjustable)

Float Position (viewed from front of switch, facing indicator scale)

NEMA1

NEMA4

NEMA7&9

FloatRod Angle

Max. (in.)

Min. (in.)

Catalog No. 9037HG33 9037HG35 9037HG37 9037HG39 9037HG31 9037HG34 9037HG36 9037HG38 9037HG30 9037HG32

Catalog No. 9037HW33 9037HW35 9037HW37 9037HW39 9037HW31 9037HW34 9037HW36 9037HW30 9037HW32 —

Catalog No. 9037HR33 9037HR35 9037HR37 9037HR31 9037HR34 9037HR36 9037HR38 9037HR30 9037HR32 —

22 PRESSURE, VACUUM, AND FLOAT

45°

2

5 5 7

Right

TypeHG35 Float on Right, 90° Offset Rod

90°Offset

2

8-1/4 11-1/2

File No. E12158 and E12443 Haz Loc

File LR25490, File LR26817 Haz Loc

45°

2

5 5 7

Left

90°Offset

2

8-1/4 11-1/2

NOTE: For replacement floats, see Class 9049 Type H on page 22-34. Types shaded in gray are available with Form Z19; see Table 22.98 on page 22-31. See Accessories and Renewal Parts on page 22-34.

Table 22.97: Type H Float Travel Distances

f1 in. (mm) F in. (mm) Minimum Maximum Minimum Maximum Minimum Maximum f2 in. (mm)

R in. (mm)

H [6] in. (mm) 6.22 (158) 4.25 (108) 5.50 (140) 6.25 (159) 8.25 (210)

Float Rod Angle

2.25 (57) 2.75 (70) 3.50 (89) 3.75 (95) 4.75 (121)

4.50 (114) 4.25 (108) 5.50 (140) 6.25 (159) 8.25 (210)

2.00 (52) 2.25 (57) 2.75 (70) 3.00 (76) 3.75 (95)

4.50 (110) 4.25 (108) 4.00 (102) 4.50 (110) 5.75 (146)

4.25 (108) 5.00 (127) 6.25 (159) 6.75 (171) 8.50 (216)

9.00 (229) 7.50 (191) 9.50 (241) 10.75 (273) 14.00 (356)

45°

—

3.00 (76) 4.25 (108) 5.00 (127) 7.00 (178)

90° offset

Table 22.98: Available Modifications For Class 9037 Type H [7] Description

Form

Omit 2-1/2" tank connecting bushing

F3

Omit float

L

Reverse action, contacts open on rise

R

Viton ® packing: 5 oz. float (diesel fuel) for Types shaded in gray in Table 22.96 above.

Z19 Z20 Z21

Viton packing (suitable for applications up to +250 °F)

#316 stainless steel float and Viton packing

Type HG—45° Angle Dimensions

Type HG—90° Offset Dimensions

Type HR/HW—45° Angle Dimensions

Type HR/HW—90° Offset Dimensions

2.0 51

Across Flats

Bushing

H

4.75 122

Bushing

Bushing

H

4.81 122

6.22 158

2.0 51

Across Flats

2.0 51

Across Flats

CL

CL

1.81 46

12.44 316

R

3.63 92

f2

2.56 65

CL

17

3.86 98

R

0.66

1.22 31

Across Flats Bushing

2.0 51

F

CL

12.44 316

7.13 184

6.94

17

0.66

6.94

176

CL

16.06 408

f1

1.06

176

6.22 158

27

3.86 98

1.06

27

16.94 430

Dia.

Dia.

2.88 73

2.5

11.5 292

0.66 17

0.66 17

64

2.5

11.5 292

64

f2

6.22 158

5.98 152

2.5 64

2.58 65

Pipe Thread

2.58 65

CL

F

4.78 121

Pipe Thread

2.5 64

4.44 113

2.5" NPT

2.5" NPT

f1

7.13 184

0.38 10

1.44 37

0.38 10

0.44 11

0.44 11

3.63 92

Two(2)

0.5 13

Conduit Openings

0.38 10

Extreme Float Position – See Price Sheet

0.38 10

0.44 12

0.44 12

Extreme Float Position – See Price Sheet

3.89 99

6.22 158

6.22 158

5.5 140

3.38 86

14.66 372

15.09 383

Clearance from the centerline of the hub to the side of the tank.

[6]

[7] Some product configurations are not available—contact your Schneider Electric representative for details.

22-31

© 2019 Schneider Electric All Rights Reserved

8/17/2020