Paddle Series V6

Product Applications

  • Protects pumps, motors and other equipment against low or no flow
  • Controls sequential operation of pumps
  • Automatically starts auxiliary pumps and engines
  • Stops liquid cooled engines, machines and processing when coolant flow is interrupted
  • Shuts down burner when air flow through heating coil fails
  • Controls dampers according to flow
  • Signals alarm when emergency shower or eyewash station in use


The Series V6 Flow Switch is surprisingly compact, and specifically engineered to monitor liquid, gas, or air flows. Time tested in thousands of pipeline installations and processing plants around the world, this Series is Weatherproof, designed to meet NEMA 4 and Explosion-proof (listing included in specifications). Tees are available for installation in pipelines from 1/2″ to 2″ (12.70 to 50.80 mm). With bushings added the unit is easily adapted to 1/4″ and 3/8″ (6.35 and 9.53 mm) piping.


ServiceGases or liquids compatible with wetted materials.
Wetted MaterialsStandard V6 Models: Vane: 301 SS; Lower Body: brass or 303 SS; Magnet: ceramic; Other: 301, 302 SS; Tee: brass, iron, forged steel, or 304 SS.
V6 Low Flow Models: Lower body: brass or 303 SS; Tee: brass or 304 SS; Magnet: ceramic; O-ring: Buna-N standard, Fluoroelastomer optional; Other: 301, 302 SS.
Temperature Limit-4 to 220°F (-20 to 105°C) Standard, MT high temperature option 400°F (205°C) (MT not UL, CSA, ATEX, IECEx or KC) ATEX Compliant AT, IECEx IEC Option and KC (KC Option), Ambient Temperature -4 to 167°F (-20 to 75°C) Process Temperature: -4 to 220°F (-20 to 105°C).
Pressure LimitBrass lower body with no tee models 1000 psig (69 bar), 303 SS lower body with no tee models 2000 psig (138 bar). Brass tee models 250 psi (17.2 bar), iron tee models 1000 psi (69 bar), forged and stainless steel tee models 2000 psi (138 bar), low flow models 1450 psi (100 bar).
Enclosure RatingWeatherproof and Explosion-proof. Listed with UL and CSA for Class I, Groups A, B, C and D; Class II, Groups E, F, and G. (Group A on stainless steel body models only). ATEX CE 2813 II 2 G Ex db IIC T6 Gb Process Temp ≤75°C Alternate Temperature Class T5 Process Temp ≤90°C, 115°C (T4) Process Temp ≤105°C consult factory. EU-Type Certificate No.: KEMA 04ATEX2128. ATEX Standards: EN 60079-0:2012+A11:2013; EN 60079-1:2014.IECEx Certified: For Ex db IIC T6 Gb Process Temp≤75°C Alternate Temperature Class T5 Process Temp ≤90°C, 115°C (T4) Process Temp≤105°C consult factory. IECEx Certificate of Conformity: IECEx DEK 11.0039; IECEx Standards: IEC 60079-0:2011; IEC 60079-1:2014; Korean Certified (KC) for: Ex d IIC T6 Gb Process Temp ≤75°C; KTL Certificate Number: 12-KB4BO-0091.
Switch TypeSPDT snap switch standard, DPDT snap switch optional.
Electrical RatingUL models: 5 A @125/250 VAC. CSA, ATEX and IECEx models: 5 A @ 125/250 VAC (V~); 5A res., 3 A ind. @ 30 VDC (V ). MV option: .1 A @ 125 VAC (V~). MT option: 5 A @125/250 VAC (V~). [MT option not UL, CSA, ATEX or IECEx].
Electrical ConnectionsUL models: 18 AWG, 18″ (457.20 mm) long. ATEX/CSA / IECEx models: terminal block.
Conduit Connection3/4″ (19.05 mm) male NPT standard, 3/4″ (19.05 mm) female NPT or M25 with BSPT option on junction box models.
Process Connection1/2″ (12.70 mm) male NPT or 1/2″ (12.70 mm) male BSPT on models without a tee.
Mounting OrientationSwitch can be installed in any position but the actuation/deactuation flow rates in the charts are based on horizontal pipe runs and are nominal values.
Set Point AdjustmentStandard V6 models none. Without tee models vane is trimmable. Low flow models are field adjustable in the range shown. See set point charts on Catalog page.
Weight2 to 6 lb (.9 to 2.7 kg) depending on construction.
Agency ApprovalsATEX, CE, CSA, IECEx, KTL, UL.


  • Leak proof body machined from bar stock
  • Choice of models in a tee with calibrated vane or field adjustable trimmable vane
  • Electrical assembly can be easily replaced without removing the unit from the installation so that the process does not have to be shut down
  • High-pressure rating of 1000 psig (69 bar) with brass body and 2000 psig (138 bar) with a stainless steel body
  • Low flow model offers field adjustable set point
  • Easy installation with simply pipe insert via the tee & simple electrical switch connections
  • Unique magnetically actuated switching design gives superior performance
  • Features a free-swinging vane which attracts a magnet within the solid metal switch body, actuating a snap switch by means of a simple lever arm with no bellows, springs, or seals to fail