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Flow Switch – In-line Model Q-4E

Uses

Monitoring flow of coolants and fluids supplied to:

  • Air Conditioning Systems
  • Plastic Molding Equipment
  • Cooling in Data Centers
  • Scrubbers
  • Diodes, SCRs, Triacs, etc.
  • Spot Welders
  • Fluid Blending Systems
  • Transformers
  • High Power Transistors
  • Vacuum Systems
  • Railroad Engine Lubrication Systems

Other Uses:

  • Monitor Filter Clogging
  • Starting Back-up Pumps Fire Sprinkler Flow Alarms

Models

ORIFICE/ PADDLE # CONTINUOUS SWITCH POINT ADJUSTMENT RANGE
1 4 to 8 GPM
2 6 to 20 GPM
3 15 to 35 GPM
4 25 to 70 GPM

 

Q4
Group
Q-4E

Specs

HYSTERESIS (Δ FLOW RATE TO ACTIVATE/DEACTIVATE SWITCH)
≈ 5% at upper end of flow range
≈ 25% at lower end of flow range

DIFFERENTIAL PRESSURE DROPS ACROSS UNIT
Under normal operating conditions:
≈ 1.0 psig at upper end of flow range
≈ 5.0 psig at lower end of flow range

WORKING LINE PRESSURE
300 psig max. @ 180˚F max (Proof tested to 1,200 psi @ 70˚F)

WORKING TEMPERATURE
180˚F max. (May be extended to 200˚F for short periods.)

WETTED MATERIALS
Body: Red brass Hardware: Noryl® (PPO) (10% glass fibers), Plastic Working fluid “sees” red brass, phosphor bronze, and EPDM Elastomer Seal Gasket: Cork/Nitrile blend Optional Seal: Hypalon, Viton® or FKM

ELECTRICAL SWITCH CHARACTERISTICS
SPDT (single pole double throw) 15A, 1/2 hp @ 125 or 250VAC .A @ 125VDC, .A @ 250VDC 5A @ 125VAC (tungsten lamp load) 10,000,000 Operations Median Switch may be overloaded to 20A @ 125 or 250VAC for a minimum of 20,000 operations. Model Q-4E can also be fitted with a SPDT Gold Cross Bar Switch for computer/PLC interface.

Diagram

q4-diagram