Flow Switch Model Q-5SS Stainless Steel

The Strongest Flow Switch Stainless

Designed for extreme, long-term reliability.

Detects and signals flow change.

Continuously adjustable while in operation.

For use in particle contaminated fluids.

Multiple quick change paddles (and continuous spring adjustment) provide an incredibly wide operating range of flow rates and viscosities.

Use with an intrinsically safe relay allows Model Q-5SS to be used in hazardous areas.

Maintains calibration limits when subjected to reasonable line hydraulic hammer or surge pulses.

Calibrated independent of line pressure and temperature.

DPDT model available per request.

Flow Range

5–102,000+ GPM (18.9–386.1 kL/m)

Working Temp

180˚F (82˚C) Maximum

Working Pressure

300 psig (2,068 kPa)

Process Connection

1″ NPT

Electrical Switch

SPDT (single pole double throw) 15A or Dry Circuit

Uses

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

Models

Q-5N: WETTED MATERIALS:
Body and Lid: Brass
Hardware: Noryl® (PPO) (10% glass fibers), 316 stainless steel
Working fluid “sees” red brass, phosphor bronze and EPDM elastomer seal
Gasket: Cork/Nitrile blend Optional Seal: Hypalon, Viton® or FKM
Q-5SS: WETTED MATERIALS:
Body and Lid: 316 Stainless steel. Hardware: Noryl® (PPO) (10% glass fibers), 316 stainless steel
Working fluid “sees” 316 stainless, Teflon® or PTFE gasket and Viton® or FKM elastomer seal.

 

PIPE SIZE NPT CONTINUOUS SWITCH POINT ADJUSTMENT RANGE (GPM) PIVOT SHAFT # PADDLE #
Red Brass 316 Stainless Steel
1″ 5 to 15 10 to 20 2 2
12 to 36 20 to 60 2 1
1 1/2″ 7 to 21 14 to 42 3 3
10 to 30 20 to 60 3 2
20 to 75 30 to 90 3 1
2″ 14 to 42 21 to 63 3 4
20 to 60 30 to 90 3 2
50 to 150 60 to 180 3 1
3″ 27 to 81 45 to 135 5 4
45 to 135 75 to 225 5 2
110 to 330 130 to 390 5 1
6″ 65 to 195 103 to 309 5 6
80 to 240 125 to 375 5 5
190 to 570 300 to 900 5 2
450 to 1,350 550 to 1,650 5 1

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), 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.

Diagram

diagram_q-5