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  1. Caleffi Series R500 SolarFlex Union Washer

    Caleffi Series R500 SolarFlex Union Washer

    Union Washer
    Caleffi Series R500 SolarFlex Union Washer
    $1.25

  2. Steca Temperature Difference Regulator

    Steca Temperature Difference Regulator

    Steca STR1 Temperature Difference Regulator

    Our STR 1 includes everything that is needed for a thermal solar system. Apart from the controller for temperature differences an electronically controlled limitation of the storing temperature has been built in. Of course, it is possible to adjust hysteresis, temperature difference and max. storing temperature individually. By using the hand-gear control you can adjust the pump for testing or other operations. A display indicating the temperature informs you about the collector temperature to be stored. Another very important point was the breakdown safety switch which does not lower your solar system’s performance since it is very low in self-consumption. The regulator is supplied including a collector temperature sensor and a storage temperature sensor in the lower storage tank area for limiting the maximum storage temperature.

    • Individually adjustable switch-on temperature difference, switch-off hysteresis and maximum storing temperature
    • Display unit for the storing and collector temperature
    • Temperature sensor with error flag
    • Storing temperature limitation
    • Easiest assembly and handling
    • Coordinate safety concept
    • Hand-gear control
    • Status display
    $107.26

  3. Caleffi Series 257 iSolar BX Multi-functional Temperature Differential Controller

    Caleffi Series 257 iSolar BX Multi-functional Temperature Differential Controller

    Caleffi Series 257 iSolar BX Multi-functional Temperature Differential Controller
    The iSolar™ BX is a multi-functional temperature differential controller with add-on system functions for use in a wide variety of solar thermal heating applications. iSolar™ BX is equipped with four relay outputs; three triac pump speed control relays and one standard relay. These outputs include two pulse width modulation (PWM) outputs that enable energy conservation measures for high-effi ciency direct current (DC) pumps. The controller is equipped with fi ve Pt1000 sensor inputs, two analog Grundfos sensor inputs, and one impulse fl ow meter input. Twenty six system confi guration options are predefi ned for control of a standard solar water heating system, drainback systems, supplemental space heating, multiple storage tanks, heat dump and storage tank booster heating.
    $314.86

  4. Caleffi Series NA255 dual-line solar pump station high head/flow w/ 3-spd Wilo Star 30 pump

    Caleffi Series NA255 dual-line solar pump station high head/flow w/ 3-spd Wilo Star 30 pump

    Caleffi Series NA255 Commercial Solar Pump Station
    Drainback solar pump stations designed with a high head and steep pump curve which are pre-assembled and leak-tested. Safety relief valve, ball valve, temperature gauge, pressure gauge, air fi ll valve. Connections for fl ushing and fi lling with foam insulation. Balance/fl ow meter: ½—5 gpm scale. Pump: Grundfos UP15-100 Performance: 36 feet head / 8 gpm. Safety relief valve: 90 psi. Max. working pressure: 150 psi. Max. working temp: 360ºF. Connections: ¾" female thread. Agency approval: cULus.
    $840.68

  5. Caleffi Series 266 Single Line Sweat Fitting Kit 3/4" Male Thread to Sweat Fitting

    Caleffi Series 266 Single Line Sweat Fitting Kit 3/4" Male Thread to Sweat Fitting

    Caleffi Single Line Sweat Fitting Kit 3/4" Male Thread to Sweat Fitting
    Pump Station Fittings
    $37.03

  6. Caleffi Series 251 Discal 3/4" NPT Female Air Separator.

    Caleffi Series 251 Discal 3/4" NPT Female Air Separator.

    Caleffi Series 251 Discal 3/4" NPT Female Air Separator.
    Air separator for solar heating systems. Working temperature range: -20—320ºF. Max. working pressure: 150 psi. Max. discharge pressure: 150 psi. Connections: Main, ¾" NPT, female Drain, ½" NPT, female
    $76.74

  7. Double Nipple for 1" SolarFlex Pipe with 1.25"x1.25" Male Thread

    Double Nipple for 1" SolarFlex Pipe with 1.25"x1.25" Male Thread

    Double Nipple fitting for SolarFlex Pipe
    Double Nipple for 1" SolarFlex Pipe with 1.25"x1.25" Male Thread
    $20.47

  8. Caleffi Series NA 350 Black Film Tape UV Resistant 50ft Roll 2" Width

    Caleffi Series NA 350 Black Film Tape UV Resistant 50ft Roll 2" Width

    EPDM foam UV resistant insulating tape to wrap fitting connections.
    Caleffi Series NA 350 Black Film Tape UV Resistant 50ft Roll 2" Width
    $8.02

  9. Steca Overvoltage Protection Unit

    Steca Overvoltage Protection Unit

    Steca Overvoltage Protection Unit

    The Steca TA OP1 overvoltage protection unit is a connection socket in a splash-proof IP65 protective case and serves to protect the collector sensor against local lightning strikes and externally induced voltage spikes.

     A varistor protective diode protects against atmospheric overvoltages that can lead to the destruction of the collector sensor. The use of the Steca TA OP1 is generally recommended for extra protection of the collector sensor in any type of solar thermal system. In addition, the simple operation of the spring terminals allows rapid and simple installation of the collector sensors using a sensor extension cable.

    $82.14

  10. Caleffi Series 257 iSolar Multi-functional Temperature Differential Controller

    Caleffi Series 257 iSolar Multi-functional Temperature Differential Controller

    Caleffi Series 257 iSolar Multi-functional Temperature Differential Controller
    The iSolar™ 257 series are multi—functional temperature differential controllers that provide complete control of the solar thermal system for safe and long—lasting operation. The microprocessor based controller monitors and controls thermal solar systems by means of a collector sensor and a storage tank sensor. The controllers also perform important system monitoring and safety functions. The system parameters and measured values can be changed and viewed on the large LCD display. The controller is equipped for up to four temperature sensor inputs and one or two 120 VAC outputs (some models) for activating the solar circuit pump and second 120 VAC output for activating a valve or second pump. The controller is additionally equipped with VBus® for two-way communication between modules, PC’s or data loggers.
    $186.94

Items 31 to 40 of 57 total

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