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WITCH ACTION (Normally open/Normally closed)

Vertical Models

Vertical mount models are shipped with normally open switch contacts which close

as the float rises toward the mounting threads. Reverse switch action by removing

the float, rotating it end-for-end and replacing it on the stem.

Horizontal Models

Contacts in horizontal models F7-HPS-1 (internal mount) and F7-HPS-2 (external

mount), are normally open when the float is down and normally closed when the

float is up. Models F7-HPS-1 and -2 also have indicating arrows on the stem end

to confirm float alignment. See installation notes on reverse. Horizontal model F7-

HSS is in the normally open position when the indicating arrow points up, and

normally closed when the arrow points down.

INSTALLATION

Choose a location away from fill pipes, drains, or other areas where turbulence or

wave motion might occur. Turbulence will cause false actuations and shorten

contact life. Excess contaminants in fluid may inhibit float operation and occasional

wipe-down may be necessary. Care should be taken that switches are always

operated within electrical ratings. Read and understand all safety precautions on

back of this sheet before installing.

MOUNTING

Install vertical mount models in an appropriate 1/8˝ NPT fitting. Vertical models

mount internally, oriented within 30° of vertical, or select optional fittings for

external mounting. Model F7-HPS-1 must be mounted internally, which means the

switch must be secured to the wall of the tank or vessel from the inside. Install

horizontal model F7-HPS-1 in a 5/8˝ (16 mm) hole and secure with nut provided.

Tank wall should not exceed 1/8˝ (3 mm). Model F7-HPS-2 requires a horizontal

1/2˝ NPT(F) fitting and can be fitted to the tank or vessel from the outside. Model

F7-HSS requires a horizontal 1/2˝ NPT(F) fitting and can be mounting from the

inside or outside (internally or externally) of the tank or vessel.

Series F7 Liquid Level Switches

Bulletin E-75

PIPE

COUPLING

ELBOW

PIPE

DWYER INSTRUMENTS, INC.

Phone: 219/879-8000 www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: [email protected]

PECIFICATIONS

Electrical Rating (Maximum):

F7-SB, SS2: AC: 25 VA, 1A @ 200 V.

DC: 10W, 1A @ 200V.

F7-PP, BT, HSS: AC: 30 VA, 0.14A @ 200V.

DC: 0.28A @ 24 V, 0.07A @ 120V.

F7-MPP: 10 VA, 0.1A @ 120 VAC.

F7-MPP-NO: 50 VA, 0.2A @ 240 VAC.

F7-HPS: 15 VA, 1A @ 220 VAC/DC.

Mounting Connections: 1/8˝ NPT(M) (all vertical mount), 1/2˝ NPT(M) (F7-HPS-

2, F7-HSS), M16 x 2 (F7-HPS-1).

Wire Leads: F7-SB, SS2, PP, BT: 22 AWG x 18˝ (46 cm); F7-MPP, HSS: 22

AWG x 24˝ (61 cm); F7-HPS: 22 AWG x 39˝ (1m).

Enclosure Rating: F7-HSS: Explosion-proof, Class 1, Groups A, B, C, D; Class

II, Groups E, F, G; Class III.

Weight: F7-SB, 2 oz. (58 g); F7-SS2, 1.2 oz. (34 g); F7-PP, 0.8 oz. (23 g); F7-

BT, 0.7 oz. (20 g); F7-HPS-1, 1.5 oz. (43 g); F7-HPS-2, 2 oz. (57 g); F7-HSS, 3

oz. (94 g); F7-MPP, 0.8 oz. (23 g).

(

Model F7-SB Shown)

odel

F7-SB

F7-SS2

F7-PP

F7-BT

F7-MPP

(

A) Stem

ength

2.75 (70)

2.06 (52)

2.18 (55)

1.63 (41)

(

B) Float

Diameter

1.13 (29)

1.0 (25)

1.18 (30)

.18 (30)

0.63 (16)

eight

.38 (35)

.0 (25)

1.0 (25)

.63 (16)

(

D) Actuation

from HEX

1.0 (26)

0.73 (19)

0.69 (18)

.69 (18)

0.47 (12)

Model

Vertical Mount

F7-SB

F7-SS2

F7-PP

F7-BT

F7-MPP

Horizontal Mount

F7-HPS

-1, -2

F7-HSS

Material

Float/Stem

Buna-N & Epoxy/316SS

316SS (CYC)/316SS

Polypropylene &

Epoxy/Polypropylene

Buna-N & Epoxy/PBT*

Polypropylene /

Polypropylene

Polysulfone/

Polysulfone

316SS/316SS

Max

Temp.

220°F

105°C

300°F

149°C

220°F

105°C

220°F

105°C

176° F

80° C

185°F

85°C

392°F

200°C

Max

Press.

150 psig

10 bar

450 psig

31 bar

100 psig

6.89 bar

150 psig

10 bar

100 psig

6.89 bar

150 psig

10 bar

300 psig

20.7 bar

Min

S.G.

0.60

0.75

0.60

0.45

0.90

0.85

0.60

Approx.

Deadband

1/16˝

2 mm

1/16˝

2 mm

1/8˝

4 mm

1/8˝

4 mm

1/8˝

4 mm

3/16˝

5 mm

1/8˝

4 mm

imensions, Inches (mm)

*PBT - Polybutylene Terephthalate

Optional Fittings (for Exterior Mounting of Vertical Models)

A-347, 1/8˝ x 1-1/4˝ NPT C.S. Adapter.

A-347-SS, 1/8˝ x 1-1/4˝ NPT 316SS Adapter.

A-348, 1/8˝ x 1-1/2˝ NPT C.S. Adapter.

A-348-SS, 1/8˝ x 1-1/2˝ NPT 316SS Adapter.

13/16 [20.62]

DIA. MAX.

1-33/64

[38.48]

40∞ MAX

3-15/32 [88/09]

M16X2

WITCH CLOSED

POSITION

2-15/64 [56.74]

SWITCH OPEN

POSITION

13/16 [20.62]

MAX

1-19/32

[40.46]

40∞ MAX

SWITCH CLOSED POSITION

3-7/16 [87.29]

2-23/64 [59.92]

2 [50.80]

1/2 NPT

SWITCH OPEN

POSITION

3/4

[19.05]

13/16 MIN

[20.6]

22 AWG

LEAD WIRES

1/2-14 NPT

-5/8 MAX

[

116.8]

PPROXIMATE

CTUATION LEVEL

ITTING

ENTERLINE

3/32

[2.54]

1-7/32 MAX

[31.0]

1-5/32 MAX

[29.2]

EXTERNALLY

WELDED FLANGE

7-HPS-2, INTERNAL HORIZONTAL MOUNT

F7-HPS-2, EXTERNAL HORIZONTAL MOUNT

Specifications - Installation and Operating Instructions

7-HSS

1 2

DWYER INSTRUMENTS, INC 1

Résumé du contenu

Page 1 - DWYER INSTRUMENTS, INC

SWITCH ACTION (Normally open/Normally closed)Vertical ModelsVertical mount models are shipped with normally open switch contacts which closeas the flo

Page 2

Inductive LoadsPossible causes -An electromagnetic relay, electromagneticsolenoid, electromagnetic counter with inductivecomponent as circuit load.

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Dwyer F7 Manuel d'utilisateur

Naviguer en ligne ou télécharger Manuel d'utilisateur pour Routeurs Dwyer F7. Dwyer F7 User Manual Manuel d'utilisatio

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