Harwil Fluid Flow Switch,Q-5/2/L/B,Q-5/3/H/F,Q-5/2/H/C,L-5/B, - 5 Units

Monitoring flow of coolants and fluids supplied to:

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

Other Uses:

• Fire Sprinkler Flow Alarms
• Municipal Water Supply Systems
• Oil Supply to Bearing & Gear Systems

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), 316 stainless steel, Plastic Working fluid “sees” red brass, 316 stainless steel, 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-5 and Q-5SS can also be fitted with a SPDT Gold Cross Bar Switch for computer/PLC interface.