Flow Switch

Series
V4 Vane Operated Flow Switch
Field adjustable - 1½ to 20 inch pipe. Leak proof body.

Dimensional Enlargement

Compact and reliable, the Flotect V4 Flow Switch operates automatically to protect equipment and pipeline systems against damage from reduction or loss of flow. Installed in thousands of pipelines and processing plants around the world, this unique magnetically actuated switching design assures superior performance. Universal multilayer vane accommodates pipe sizes from 1 1/2" up. Custom vanes are available with factory calibration. There are no bellows, springs or seals to fail. Instead, a free-swinging vane attracts a magnet within the solid metal switch body above, actuating a SPDT snap switch by means of a simple lever arm.
Features include: simplicity of design and a leakproof switch body, precision machined from solid bar stock for pressures to 2000 psig (140 kg/cm2), eliminating the chance of process fluid entering the switch compartment. The threaded conduit enclosure cover permits easy inspection or replacement of electrical assembly without shutting down the process - once power has been disconnected. The control fits directly into pipeline with a tee, thred-o-let or flange for fast, easy installation. Pendulum-like vane action responds accurately and consistently to fluid flow rates. Both multilayer universal and custom vanes are sensitive to low velocity flows yet are rugged enough to withstand high flow surges.
Applications: Protects motors, pumps and other equipment against low or no flow. Controls sequential operation of pumps, etc. Automatically starts auxiliary pumps and engines or actuates alarm and signal systems. Stops water cooled engines, machines and processes when coolant flow is interrupted. Shuts down burner when air flow through heating coil fails. Controls dampers according to flow. Stops machines if lubricating oil flow ceases.

PHYSICAL DATA

Temperature Units: Standard 275°F (135°C) High temperature option (not U.L., C.S.A. or CENELEC/SAA), 400°F (205°C) max.

Operating Pressure: Brass 1000 PSIG (70 kg/cm2). 316SS 2000 PSIG (140 kg/cm2). Ratings to 5000 PSIG (350 kg/cm2) available only SPDT. Only SS body.

Electrical Rating: U.L. and CENELEC/SAA: 10A @ 125/250 VAC C.S.A.; 5A @ 125/250 VAC, 5A resistive, 3A inductive @ 30 VDC. Optional ratings (not U.L., C.S.A. or CENELEC/SAA) MV option: Gold Contacts for dry circuits. Rated 1 amp @ 125 VAC, 1 amp resistive, 1/2 amp inductive @ 30 VDC. MT option: 400°F (205°C) 5 amp Q 125/250 VAC.

Wiring: U.L./C.S.A. unit; 16 gauge copper wire, 6" (152 mm) long, mechanically and solder bonded to switch. CENELEC/SAA unit: Temminal board.

Switch Body: One piece milled and bored Brass or 316SS. Other materials on request.

Vane: 316SS 1 9/16" (40 mm) wide. Std. trim includes 430SS and silver solder. Other materials on request.

Piping Connection: 1 1/2" NPT std for mounting in 1 1/2" thredolet. Thredolet fittings available.

Installation: Within 5° of vertical for proper operation. Units for horizontal installation (vertical pipes) on request.

Weight: 4 lb. 5 oz. (1.96 kg).

Options: All 316SS wetted parts. DPDT circuits. Time delay relay.

Actuation - Deactuation Ranges with Universal Vane

Cold Water - As low as 8.8 - 3.0 GPM (2.0 - 0.7 M3HR) in 11/2" pipe up to 2900 -1100 GPM (659 - 250 M3HR) in 20" pipe.

Air - As low as 6.1 - 25 SCFM (0.03 - .012 NM3/S) in 11/2" pipe up to 14,300 - 5900 SCFM (6.7 - 2.8 NM3/S) in 20" pipe.

(Consult factory for more detailed flow information).

STOCKED MODELS

Model Number Description

V4-2-U
V4-SS-2-U
V4
V4-SS Brass, Universal Vane
316SS*, Universal Vane
Brass, Custom Vane
316SS*, Custom Vane

*316 SS body, float and vane with 430SS magnet keeper (wetted part). For 316SS magnet keeper specify: With all 316SS parts.

Options for Series V4 Flotect Switches

-D DPDT Contacts

-MT High temperature construction (400°F) available on all stainless steel models. Not UL, CSA or CENELEC listed.

-TR Time Delay Relay. (2) SPDT, adjustable from 0-1 to 0-31 minutes. Not UL, CSA or CENELEC listed.

-CN CSA and CENELEC approved.

Fittings for Series V4 Flotect Switches

1 1/2" Thred-o-let Specify pipe size

2 1/2" Bushing Carbon Steel, required with wide vane V4's

2" Flange 150# carbon steel raised face connection. Custom vane required.

Temperature Units:	Standard 275°F (135°C) High temperature option (not U.L., C.S.A. or CENELEC/SAA), 400°F (205°C) max.
Operating Pressure:	Brass 1000 PSIG (70 kg/cm2). 316SS 2000 PSIG (140 kg/cm2). Ratings to 5000 PSIG (350 kg/cm2) available only SPDT. Only SS body.
Electrical Rating:	U.L. and CENELEC/SAA: 10A @ 125/250 VAC C.S.A.; 5A @ 125/250 VAC, 5A resistive, 3A inductive @ 30 VDC. Optional ratings (not U.L., C.S.A. or CENELEC/SAA) MV option: Gold Contacts for dry circuits. Rated 1 amp @ 125 VAC, 1 amp resistive, 1/2 amp inductive @ 30 VDC. MT option: 400°F (205°C) 5 amp Q 125/250 VAC.
Wiring:	U.L./C.S.A. unit; 16 gauge copper wire, 6" (152 mm) long, mechanically and solder bonded to switch. CENELEC/SAA unit: Temminal board.
Switch Body:	One piece milled and bored Brass or 316SS. Other materials on request.
Vane:	316SS 1 9/16" (40 mm) wide. Std. trim includes 430SS and silver solder. Other materials on request.
Piping Connection:	1 1/2" NPT std for mounting in 1 1/2" thredolet. Thredolet fittings available.
Installation:	Within 5° of vertical for proper operation. Units for horizontal installation (vertical pipes) on request.
Weight:	4 lb. 5 oz. (1.96 kg).
Options:	All 316SS wetted parts. DPDT circuits. Time delay relay.

Cold Water	- As low as 8.8 - 3.0 GPM (2.0 - 0.7 M3HR) in 11/2" pipe up to 2900 -1100 GPM (659 - 250 M3HR) in 20" pipe.
Air	- As low as 6.1 - 25 SCFM (0.03 - .012 NM3/S) in 11/2" pipe up to 14,300 - 5900 SCFM (6.7 - 2.8 NM3/S) in 20" pipe.

Model Number	Description
V4-2-U V4-SS-2-U V4 V4-SS	Brass, Universal Vane 316SS, Universal Vane Brass, Custom Vane 316SS, Custom Vane
*316 SS body, float and vane with 430SS magnet keeper (wetted part). For 316SS magnet keeper specify: With all 316SS parts.

Options for Series V4 Flotect Switches
-D	DPDT Contacts
-MT	High temperature construction (400°F) available on all stainless steel models. Not UL, CSA or CENELEC listed.
-TR	Time Delay Relay. (2) SPDT, adjustable from 0-1 to 0-31 minutes. Not UL, CSA or CENELEC listed.
-CN	CSA and CENELEC approved.
Fittings for Series V4 Flotect Switches
1 1/2" Thred-o-let	Specify pipe size
2 1/2" Bushing	Carbon Steel, required with wide vane V4's
2" Flange	150# carbon steel raised face connection. Custom vane required.