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Flow Switch – Adjustable Model Q-8

Uses

Monitoring fluid flow in:

  • Air Conditioning Systems
  • Industrial Refrigeration Systems
  • Cooling in Data Centers
  • Pools and Spas
  • Chillers
  • Scrubbers
  • Fluid Blending Systems
  • Water Treatment Systems
  • Natural Gas

Models

PIPE SIZE CONTINUOUS SWITCH POINT ADJUSTMENT RANGE SHAFT LENGTH PADDLE SIZE
1″ 12 to 20 GPM 1 2
24 to 34 GPM 1 1
1 1/2″ 16 to 28 GPM 2 3
25 to 37 GPM 2 2
38 to 70 GPM 2 1
2″ 30 to 50 GPM 2 3
44 to 65 GPM 2 2
67 to 90 GPM 2 1
3″ 45 to 140 GPM 3 3
100 to 145 GPM 3 2
152 to 200 GPM 3 1
4” 80 to 170 GPM 3 3
175 to 240 GPM 3 2
160 to 290 GPM 3 1

 

Q8
Group
Q-8
Q-8CR
Q-8CR/BOOT
Q-8DS
Q-8N

Specs

HYSTERESIS (Δ FLOW RATE TO ACTIVATE/DEACTIVATE SWITCH)
≈ 10% at upper end of flow range
≈ 30% at lower end of flow range

DIFFERENTIAL PRESSURE DROPS ACROSS UNIT
Under normal operating conditions:
≈ 1″–3″ pipe, less than 0.5 psi
≈ 4″–10″ pipe, negligible

WORKING LINE PRESSURE:
50 psi max., operating @ 180˚F 100 psi max. non-operating @ 180˚F Pressure over 50 psi can affect the switch point range

ELECTRICAL SWITCH CHARACTERISTICS
SPDT (single pole double throw) 10,000,000 Operations Median 15A, 1/2 hp @ 125 or 250VAC .A @ 125VDC (tungsten lamp load)

Model Q-8N can also be fitted with a SPDT Gold Cross Bar Switch for computer/PLC interface.

Diagram

diagram_q-8

Compatible Chemicals

Q-8N

  • Acetic Acid
  • Ammonia Liquid 10%
  • Chlorinated Water (Potable)
  • Ethylene Glycol
  • Glycolic acid
  • Hydrochloric acid 20% – 37%
  • Hydrofluoric acid 20%
  • Hydrogen Sulfide Aqueous
  • Mineral Oil
  • Nitric Acid 10%-50%
  • Phosphoric Acid 40%-100%
  • Plating Fluids & Baths
  • Sodium Hydroxide Solution 20%
  • Soy Sause
  • Sulfuric Acid 10%
  • Vinegar
  • Water Distilled
  • Water Fresh
  • Water Mine Acid
  • Water Salt
  • Whiskey & Wine

Q-8CR

  • Acetic Acid
  • Ammonia Liquid 10%
  • Benzene
  • Diesel Fuel
  • Ethylene Chloride
  • Ethylene Dichloride
  • Ethylene Glycol
  • Glycolic acid
  • Hydrogen Sulfide Aqueous
  • Lubricants
  • Mineral Oil
  • Phosphoric Acid 40%-100%
  • Propylene Glycol
  • Sodium Hydroxide Solution 20%
  • Sulfuric Acid 10%
  • Water Distilled
  • Water Fresh
  • Water Mine Acid
  • Water Salt
  • Xylene