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MODEL Q-8DS

Economical Flow Switch for pipe sizes from 1″ to 4″

  • Sense low flow independent of pressure or temperature.
  • Turn off power or gas to heater to prevent meltdown.
  • Automatic reset – ready to go as soon as flow is re-established.
  • For direct control of pump motors, heaters, solenoid valves, etc.
  • UL component recognized (E85349)

FLOW SWITCH MODEL Q-8DS

  • SPDT, 1/2 hp, 15 AMP switching capacity @ 115 or 230 VAC standard, 25 amp, 1 HP/120 VAC: 2 HP/230 VAC on special order.
  • Wide operating range – 5 to 80 GPM, Pipe Size 1 1/2″ or 2″.
  • Quick, easy, horizontal, vertical or inverted installation in any plastic tee with a 1″ NPT side port.

Specifications

Electrical Switch Characteristics

  • SPDT UL and CSA listed
  • 15 amp, 1/2 HP @ 125 or 250 VAC
  • 1/2 amp @ 125 VDC, 1/4 amp @ 250 VDC
  • 5 amp @ 125 VAC (Tungsten lamp load)
  • 10,000,000 operations median
  • FACTORY SET SWITCH POINT (1 1/2″ PIPE):Increasing flow 5-20 GPM. Decreasing flow 3-13 GPM.Consult factory for special set points
  • DIFFERENTIAL PRESSURE DROP:1 1/2″ to 2″ pipe – less than 1.0 psi
  • WORKING LINE PRESSURE: 50 psig max @ 180°F max
  • MAXIMUM TEMPERATURE:180°F continuous
  • WETTED SURFACES: Noryl, 316 and 301 stainless steel, Viton
  • WEIGHT: 1/4 lb.

ELECTRICAL CABLE FITTING: Each unit is supplied with a water resistant strain relief cable fitting as below:

Grommet Size Nominal Cable O.D.
A 0.250
AA 0.300
B 0.375
C 0.500
F Special cover to suit customer supplied 1/2″ conduit fitting (e.g. Sealflex, Spiraduct, etc.)

 

Pipe Size Model Number Switch Point On/Off Suggested Uses Drag Strip Shape & Size
Increasing Flow (GPM) Decreasing Flow (GPM)
1″ Q-8DS / A / 10512
5.0
3.0
Pool Sweep Pump Motor Protection q8ds-catalogdrawing-1a
1-1/2″ Q-8DS / A / 10570A
19.0
13.5
1.0-1 1/2 HP Single Speed Pumps
1-1/2″ Q-8DS / A / 10502
12.0
9.5
3/4 HP Single Speed Pumps or 1.0-1 1/2 HP Two Speed Pumps
2″ Q-8DS / A / 10566
16.5
11.0
1.0-2.0 HP Single Speed Pumps
2″ Q-8DS / A / 10593
14.4
10.2
1.0-2.0 HP Two Speed Pumps
  • Installation drawing and a numbered parts list is supplied with each unit.
  • Special One Day Delivery Available.

Chemical Compatibility

The Models Q-8DS is compatible for use with the following chemicals: Acetic Acid, Ammonia, Ammonium Chloride, Ammonium Sulfate, Hydrochloric Acid, Hydrogen Sulfide, Nitric Acid, Phosphoric Acid, Plating Solutions, Potassium Carbonate, Potassium Chloride Sodium Bicarbonate, Sodium Hydroxide, Sodium Hypochlorite, Sodium Sulfate, Tannic Acid, Water – Acid – Mine, Water – Distilled, Water – Fresh, Water – Salt, Zinc Chloride, Zinc Sulfate

This list is just a sample selection. For specific concentrations and configurations see the Chemical Resistance Chart.