Dwyer Instruments SERIES L4 Catalog Page

FLOA

[41.28]

19-5/32 [486.57]

ANSI RF THREADED

3/4 [19.05] NPT OR BSPT

2-7/8 [73] DIA.

2-1/2 [63.50]

THREADED BRANCH

FACE BUSHING

1-1/2 [38.10]

THREADED BRANCH

*FLANGE F

SHOULD NOT EXCEED 20˝ [508 mm].

THREADED

REDUCING FLANGE

SERIES L4 | W.E. ANDERSON™ BY DWYER

FLOTECT® FLOAT SWITCH

Magnetically Operated Switch, Leak Proof Body, Explosion-Proof

T OF 316 SS

[STANDARD]

1-5/8

316 SS OR BRASS

HEX FLOAT

CONNECTION

[127]

DEFLECTION

FLOAT ARM AND BLOCK

LOCK

NUT

[152.4]

STOP

HINGE

MAGNET KEEPER

430 SS

SWITCH BODY OF BRASS OR 316 SS

1-1/2

[38.10] NPT

OR BSPT

8-5/32 [207.17]

3-15/16 [100.01]

5-31/32 [151.61]

EXPLOSION PROOF

HOUSING WITH 3/4

CONDUIT CONNECTION

16 GA. LEADS, 6 [152.4] LONG

2-1/2 [63.5]

3-11/32

[84.93]

LEVEL

CONNECTION

Standard installation Horizontal, ange installation

The Series L4 Flotect® Float Switch is a rugged and reliable oat switch which operates automatically to indicate tank level.

FEATURES/BENEFITS

• Unique magnetically actuated switching design gives superior performance

• No bellows, springs, or seals to fail

• Free-swinging oat attracts a magnet within the solid metal switch body, actuating a

snap switch by means of a simple lever arm

• Float arm hinge design limits the arm angle to prevent vertical hang up

APPLICATIONS

• Direct pump control for maintaining level

• Automatic tank dump operations

• Level control

• Valve control

• Level alarm in sumps, scrubber systems, hydro-pneumatic tanks, boilers, and water/ wastewater treatment processes

OPTIONS To order

add sufx: Description

-D

-NH

-MV

-MT

-TRI

-TRD

-316

-AT

-IEC

-TOP

-50

-150

-300

-BSPT

*316 SS body and oat with 430 SS magnet keeper (wetted part). Consult factory for price and availability of ttings for L4 installation.

Threaded branch connection, bushings, and anges are available in a variety of

sizes and materials.

DPDT contacts No housing Gold plated contacts for dry circuits (see electrical rating in

specications, no listings or approvals)

High temperature rated 400°F (204°C) (see electrical rating in

specications, no listings or approvals)

Time delay relay with 2 SPDT contacts, adjustable from 0-1 to 0-31

minutes (increasing ow)

Time delay relay with 2 SPDT contacts, adjustable from 0-1 to 0-31

minutes (decreasing ow) (no listings or approvals)

*316 SS magnet keeper option to replace standard 430 SS ATEX compliant construction

IECEx certied construction Top mounted for vertical ange installation [distance from ange face to centerline of oat to be specied, 20˝ (508 mm) max] Optional oat (2-1/2˝ spherical) 304 SS rated 50 psig (3.5 bar) and 0.5

min. s.g.

Optional oat (2-1/2˝ spherical) 316 SS rated 150 psig (10.3 bar) and

0.7 min. s.g.

Optional oat (2-1/2˝ spherical) 304 SS rated 300 psig (20.7 bar) and

0.7 min. s.g.

1-1/2˝ female BSPT process connection

CUT HOLE

1-15/16 [49] DIA.

REDUCING FLANGE

11-3/4

[298.5]

3/4 [19.50]

CONNECTION

2-1/2 X 1-1/2

[63.50 X 38.10]

Horizontal, 2-1/2 threaded branch

connection installation with optional

2-1/2 [64] spherical oat Vertical, ange installation

SPECIFICATIONS Service: Liquids compatible with wetted materials.

Wetted Materials: Float and Rod: 316 SS; Body: Brass or 316 SS standard;

Magnet Keeper: 430 SS standard, 316 SS or nickel optional. Temperature Limits: 4 to 275°F (-20 to 135°C) standard, MT high temperature option 400°F (205°C) [MT option not UL, CSA, ATEX or IECEx]. ATEX and IECEx options: Ambient temperature -4 to 163°F (-20 to 73°C); Process temperature -4 to 163°F (-20 to 73°C). Pressure Limit: Brass body 1000 psig (69 bar), 316 SS body 2000 psig (138 bar).

Standard oat rated 100 psig (6.9 bar). For other oats, see options.

Enclosure Rating: Weatherproof and Explosion-proof. **Listed with UL and CSA for Class I, Groups C and D; Class II, Groups E, F, and G. ATEX

2813 II 2 G Ex db IIB T6 Gb -20°C≤Tamb≤73°C.

-20°C≤Process Temp≤73°C. EU-Type Certicate No.: KEMA 03 ATEX 2383.

ATEX Standards: EN 60079-0:2012+A11:2013.

IECEx Certied: For Ex db IIB T6 Gb -20°C≤Tamb≤73°C. -20°C≤Process Temp≤73°C. IECEx Certicate of Conformity: IECEx DEK 11.0071.

IECEx Standards: IEC 60079-0:2011; IEC 60079-1:2014. Switch Type: SPDT snap switch standard, DPDT snap switch optional. Electrical Rating: UL, FM, ATEX and IECEx models: 10 A @ 125/250 VAC (V~). CSA models: 5 A @ 125/250 VAC (V~); 5 A res., 3 A ind. @ 30 VDC (V ). MV option: 1 A @ 125 VAC (V~); 1 A res., .5 A ind. @ 30 VDC (V ). MT option: 5 A @ 125/250 VAC (V~). [MT and MV option not UL, CSA, FM, ATEX or IECEx].

Electrical Connections: UL and CSA models: 16 AWG, 6˝ (152 mm) long. ATEX

and IECEx unit: terminal block.

Conduit Connection: 3/4˝ (19.05 mm) female NPT standard or M25 with -BSPT

option.

Process Connection: 1-1/2˝ (38.10 mm) male NPT or 1-1/2˝ (38.10 mm) male BSPT standard, 2-1/2˝ (63.50 mm) male NPT or 2-1/2˝ (63.50 mm) male BSPT standard optional oats.

Mounting Orientation: Horizontal installation standard, optional vertical top mount.

Dead Band: 3/4˝ (19 mm) for standard oat.

Specic Gravity: 0.7 minimum with standard oat. For other oats see model

chart.

Weight: 4 lb 9 oz (2.07 kg). Agency Approvals: ATEX, CE, CSA, FM, IECEx, UL**.

**No housing option (-NH) has no approvals.

MODEL CHART

Model Description L4

L4-NH** L4-SS L4-SS-NH** L4-BSPT L4-SS-BSPT

*316 SS body and oat with 430 SS magnet keeper (wetted part).

**No housing option (-NH) has no approvals.

USA: California Proposition 65 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

CUT HOLE

Brass body, side wall mounting Brass body, side wall mounting, no housing 316 SS* body, sidewall mounting 316 SS* body, sidewall mounting, no housing Brass body, side wall mounting 316 SS* body, sidewall mounting

NPT OR BSPT

ACE TO CENTERLINE OF FLOAT

SPECIFIED BY CUSTOMER. NORMALLY

ANSI RF

Process Connection

NPT NPT NPT NPT BSPT BSPT

DWYER INSTRUMENTS, INC. | dwyer-inst.com

Level Switches,

Float

309