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    Dwyer 热式流量开关 TDFS2系列

    Non-Mechanical, Low Pressure Drop, Large Pipe Sizes

    The Series TDFS2 Thermal Dispersion Flow Switch is a thermal flow switch that indicates whether the flow rate is above or below a user set flow rate. The unit incorporates two LED status indicators providing visual switch indication. The set flow rate (setpoint) is easily field adjustable with included magnet and the unit has both NO and NC NPN outputs.

    应用及案例


    • Boiler flow proving

    • Hot water heaters

    • Chillers

    • Liquid transfer systems


    产品特色


    • Better reliability and life expectancy than mechanical flow switches with no paddles or vanes to wear or break, no jams in the paddle movement, and no seals on movement assembly to wear or leak

    • Not affected by empty pipe as it avoids overheating by actively heating above the process temperature and then cooling down to process temperature

    • Low pressure drop; only needs to be inserted 10% into the flow (e.g. 1/8" for 3/4" schedule 40 pipe)


    技术指标


    Service    Compatible water-based fluids

    Wetted Materials    316SS

    Pipe Range    1/2 to 1-1/2" (15 to 40 mm) or 2 to 10" (50 to 250 mm) (model selectable)

    Set Point Range    0.5 to 10 ft/s (0.15 to 3.0 m/s)

    Repeatability    0.07 ft/s (0.02 m/s) +3% of setpoint

    Typical Deadband    0.1 ft/s (0.03 m/s) +15% of setpoint

    Temperature Limits    Ambient: 5 to 140°F (-15 to 60°C); Process: 5 to 140°F (-15 to 60°C), Storage: -40 to 185°F (-40 to 85°C)

    Pressure Limits    300 psig (20.67 bar)

    Response Time    Approx. 8 s

    Power Requirement    9 to 24 VDC

    Switching Current    400 mA, de-rate 5 mA/°C above 23°C

    Current Consumption    Average: 93 mA; Peak: 300 mA

    Electrical Connection    1/2' NPT female or cable gland with 4 conductor 22 AWG 6' (1.83 m) long (model selectable)

    Process Connection    1/2" NPT or BSPT male (model selectable)

    Enclosure Rating    NEMA 4X (IP65)

    Housing Materials    316 SS, 416 SS, polycarbonate, neoprene, and acrylated urethane

    Switch Type    1 NO NPN, 1 NC NPN

    Input Power and Protection    0.5A fuse (resettable) reverse polarity protected

    Switched Output Protection    0.5A fuse (resettable) reverse polarity protected

    Agency Approvals    CE


    选项配件


    Image

    Model   Number

    Description


    100571-00

    Replacement set point magnet


    A-TEE-SS-1

    1" NPT SS Tee


    A-TEE-SS-1-BSPT

    1" BSPT SS Tee


    A-TEE-SS-1-1/2

    1-1/2" NPT SS Tee


    A-TEE-SS-1-1/4

    1-1/4" NPT SS Tee


    A-TEE-SS-1-1/4-BSPT

    1-1/4" BSPT SS Tee


    A-TEE-SS-1/2

    1/2" NPT SS Tee


    A-TEE-SS-1/2-BSPT

    1/2" BSPT SS Tee


    A-TEE-SS-3/4

    3/4" NPT SS Tee


    A-TEE-SS-3/4-BSPT

    3/4" BSPT SS Tee


    A-WLDT-CS

    1/2" NPT CS Weldolet for 2-10"   pipe sizes


    A-WLDT-CS-BSPT

    1/2" BSPT CS Weldolet for 2-10"   pipe sizes


    A-WLDT-SS

    1/2" NPT SS Weldolet for 2-10"   pipe sizes


    A-WLDT-SS-BSPT

    1/2" NPT SS Weldolet for 2-10"   pipe sizes


    产品大图


    型号列表


    订货选型


    Model

    Description

    TDFS2-1-P-06

    Thermal dispersion flow switch for pipe   size 1/2 to 1-1/2" (15 to 40 mm), 316SS, 1/2" NPT process   connection, 6' of cable with cable gland. (Standard length)

    TDFS2-2-C-06

    Thermal dispersion flow switch for pipe   size 2-1/2" to 10" (65 to 250 mm), 316SS, 1/2" NPT process   connection, 6' of cable with conduit connection. (Extended length)

    TDFS2-2-P-06-BSPT

    Thermal dispersion flow switch for pipe   size 2-1/2" to 10" (65 to 250 mm), 316SS, 1/2" BSPT process   connection, 6' of cable with conduit connection. (Extended length)


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