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    NISSENS EXPANSION VALVE NOVELTY 2020

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     A PERSONAS LES GUSTA ESTE PRODUCTO

    NISSENS TXV

    Ensures proper working parameters of the AC system

    Knowing the thermal expansion valve's importance for the climate system and for a long, trouble-free operation of the AC compressor, we have developed our product to perfectly match the market's needs.

    The Nissens TXV has been developed according to our renowned high quality standards, is equipped with mounting bolts and o-rings and, along with a wide application range, is a competitive offering in the IAM.

    YOUR AC SPECIALIST

    We supply the market with a holistic product selection, enabling reliable performance of key automotive systems and first-time-right installation of their critical components. Our wide variety of business concepts and services are offered to support and grow your business.

     A PERSONAS LES GUSTA ESTE PRODUCTO

    STEFFEN JENSEN

    Head of Product Management

    As the AC specialist our aim is to enable our product users for the proper service procedures.

    Part crucial for the AC system operation

    As the AC specialist our aim is to enable our product users for the proper service procedures.

    Nissens Expansion Valve

    Program Highlights
    + 0

    Initial range of item numbers at launch

    + 0

    OE applications covered

    Valve Technology

    Block type TXV

    Program Scope

    Passenger Cars
    Light Vans
    Trucks

    O-rings included in the product box, mounting bolts included when applicable

    Competitive offering

    Nissens' Expansion Valves offering has been developed to match the aftermarket needs and, along with the attractive product selection and wide applications coverage, related and concepts including technical training are offered by us to help grow your AC business.

    All that you need from
    your AC Specialist

    Our aim is to supply the market with a holistic product selection within the AC category, enabling reliable performance of the climate comfort system and first-time-right installation of its critical component, i.e., the AC compressor. The TXV range from Nissens joins our well-established collection of AC parts: compressors, condensers, receiver-dryers, evaporators and fans.

    Quick & Proper Installation
    First Fit Product

    THERMAL EXPANSION VALVES FROM NISSENS

    ANJA THOMSEN

    VP Sales

    A small part but of an essential importance for the AC system and bringing business to our customers
    A small part but of an essential importance for the AC system and bringing business to our customers

    Calidad original Nissens
    máxima precisión en todos los detalles

    Ajuste adecuado para la estabilidad del funcionamiento

    Our valve's output pressure and opening characteristics are thoroughly tested and appropriately adjusted to ensure the valve's stable and appropriate function within the common range of the refrigerant temperatures and pressures that occur during the AC cycle.

    Precise, optimal operation

    The power (sensing) element is the most important component in the Expansion Valve. Our specially designed charge formula ensures the valve’s optimal operation for specific system needs in the given vehicle application.

    Perfectly tight, clean and fitting

    Inner tightness and cleanness are among the crucial qualities of our Expansion Valves, along with the fitment and durability provision. We make sure each Nissens Expansion Valve product is a perfect and safe replacement product.

    Power element

    Critical importance component
    It consists of 4-5 parts including diaphragm. The set is welded, filled with gas charge and closed. The power element is screwed on the valve's top. It provides the opening force for the valve.
    Nissens' Quality: Appropriate material and thorough welding process applied to eliminate gas leaking. Comprehensive testing.

    Rod

    Consists of a shaft that transmits the force from the power element against the spring through the ball (opening force).

    Nissens' Quality: Appropriate material and thorough finish applied. Comprehensive testing.

    Valve body

    Made in aluminum profile, with four connection. The body supports all internal and external components.

    Nissens' Quality: Appropriate material and thorough finish applied. Comprehensive testing.

    Spring

    Allows adjustments pushing the ball in direction to close the orifice. When spring force is higher than force on the rod, the ball will close the valve slightly, and less refrigerant will be allowed into the evaporator.

    Nissens' Quality: Appropriate material and thorough finish. Comprehensive testing.

    Ball

    Against the body orifice determines the valve capacity. Moves up and down due forces from power element and spring. This movement enables more or less refrigerant trough orifice valve.

    Nissens' Quality: Appropriate material and thorough finish. Comprehensive testing.

    Adjusting screw

    Designed to set the spring pressure against the ball (closing force). The end user should not adjust the screw; it is precisely pre-set in the valve production process. (VOID sticker added).

    Nissens' Quality: Appropriate adjustment applied. Comprehensive testing.

    Pin Seal

    Makes sure there is no leaks thus refrigerant flow between the low and high pressure sides of the valve.

    Nissens' Quality: High-grade material. Comprehensive testing including leak-testing.

    Power Element Seal

    Makes sure there is no leaks thus refrigerant flow between the low and high pressure sides of the valve.

    Nissens' Quality: High-grade material. Comprehensive testing including leak-testing.

    Comprehensive tests

    Nissens Expansion Valves are developed according to our renowned, high-quality standards, which include a comprehensive in-house test and validation series. These cover, among others, strict control of the valve's durability, pressure performance, tightness, opening and set-point setting, as well as its inner precise elements' finish and cleanness. The performance and durability series are carried out alternately - performance is controlled once again after the durability validation.

    Performance

    Durability

    SAFE & RELIABLE SYSTEM PERFORMANCE

    Advanced performance tests have proven, Nissens Expansion Valve is a safe, perfectly finished product designed to maintain the required refrigerant parameters (superheat), and thus the AC system's optimal thermal performance and proper balance. Furthermore, it ensures safe operation and long life span of the AC compressor, preventing it from slugging or failures related to lubrication and overheating.

    TXV Sensing Element's Behavior Test,
    Pressure Output vs Temperature

    A back-to-back test of sensing element's behavior was performed to build comparison of the outlet pressure performance generated by opening set points of various TXV brands. Nissens' item number #999222 was used for the test, along with the OE and other IAM equivalents.

    Pressure bar(g)

    Temperature °C

    TXV critical performace range

    R134a

    R134a Saturation line

    TXV pressure output

    Other TXV (private label)

    Other TXV (IAM brand)

    Nissens TXV
    OE TXV

    The Test Conclusions

    Nissens TXV's opening behavior is based on a proper sensing element charge, and thus an appropriate set-point configuration that matches the OE unit and the system-specific requirements for the refrigerant parameters.

    Significant deviations in the sensing element's behavior, and thus opening setting of the other tested TXV brands. The other tested valves' setting does not follow the OE valve's characteristics across various temperatures and considerably differs in the critical performance range (i.e. below 10°C).

    The notable, large deviations from the OE pattern may lead to a significant reduction of the system thermal efficiency, and thus provoke severe failures of the AC compressor (e.g. slugging, lubricant dilution, overheating). Furthermore, the large deviations and different from OE behavior, reveal an improper charge technology applied for the sensing element at the other brand's valves.

    Calidad original Nissens - máxima precisión en todos los detalles

    PETER VESTER

    Director of Quality & Product Development

    Whenever developing a new product, Nissens Automotive is committed to provide the best. In the test phase, we secure correct adjustment and behavior of the valve to avoid critical failures in the AC system
    Whenever developing a new product, Nissens Automotive is committed to provide the best. In the test phase, we secure correct adjustment and behavior of the valve to avoid critical failures in the AC system

    THERMAL EXPANSION VALVE COMPONENT UNDERSTANDING

    ROLE & OPERATION

    The Thermal Expansion Valve (TXV) is one of the major control components of the AC loop. It's a precise metering device that controls the amount of refrigerant released into the evaporator.

    The TXV separates the high-pressure and low-pressure sides of the AC loop. It is preset to maintain the superheat condition within the evaporator and, by this, to ensure the system's most optimal operation and output matching the needs for cold air production.

    LOCATION IN THE VEHICLE

    Majority of valves are placed at the evaporator couplings and within the vehicle's HVAC module area

    TXV BASIC FUNCTIONS

    • Modulates refrigerant flow into evaporator in regards to heat load on the system
    • Maintains the system's optimal thermal output (cold air production)
    • Prevents compressor from the refrigerant liquid form intake (slugging)
    • Contributes to the compressor's proper lubrication by ensuring sufficient refrigerant flow (thus oil traveling inside the loop)

    THERMAL EXPANSION VALVE COMPONENT OPERATION

    Power (sensing) element
    Refrigerant fill
    Valve body
    Pin's sleeve
    O-ring
    Operating pin
    Ball
    Spring
    Retainer
    Adjusting gland

    High-pressure liquid refrigerant enters the valve. The TXV, by varying the size of the orifice through which the refrigerant flows, reduces the refrigerant pressure and controls its mass rate supplied to the evaporator.

    TXV IMPORTANCE TO THE AC COMPRESSOR INSTALLATION

    BACKGROUND

    Severe AC compressor failures that qualify the component to be replaced require a complete service procedure for the AC system prior to the new part fitting. This should include the system flushing as well as replacement of other devices: the condenser (majority cannot be flushed) and, depending on application, the TXV / orifice tube.

    PROBLEM

    Impurities that caused the compressor seizure or that had appeared due to the failure - e.g. metal/Teflon splinters, etc., will often concentrate in the system's narrow passages.

    Disregarding the TXV replacement during the AC compressor installation procedure may cause the newly installed compressor's failure, and generate excessive service costs with a second repair.

    KEEP IN MIND! A faulty, clogged or improperly metering TXV will quickly affect the AC system's proper operation, worsen its output and expose the AC compressor to a premature failure.

    ALWAYS REPLACE THE TXV during an AC compressor replacement, including a system flushing procedure. Replace the valve if the system is diagnosed with severe contamination and after a compressor breakdown caused by seizure/overheating.

    Realizing the likelihood of a return repair after a newly installed AC compressor failure, economically, it is a serious risk to take when saving on the TXV replacement.

    Read our case study with cost calculation on the TXV replacement along with the AC Compressor installation.

    Case Study

    NISSENS EXPANSION VALVES

    DOWNLOADS

    Article

    Read about a brand-new AC component which expands Nissens' product range.

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    Advertisement

    Learn the most important features of the Nissens Expansion Valve.

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    Product Info Sheet

    Key product features and the offering's highlights.

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    360° Product Info Sheet

    Explanation of the thermal expansion valve's function, operation and common failures as well as replacement importance.

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    Case Study

    Read why it is recommended to replace the expansion valve by a new AC compressor installation.

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    Technical Bulletin

    TXV malfunction - possible failures and symptoms of a faulty expansion valve.

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    Nissens Expansion Valve Wallpaper

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    TXV RELATED MATERIALS

    AC Compressor Installation Guide - PDF

    Detailed AC compressor installation guide available in 22 languages.

    DESCARGAR EL PDF

    AC Compressor Installation Guide - Video

    Step-by-step video installation guide of an AC compressor.

    AC System Flushing Video

    Watch the video where Robin shows the three best ways to flush the climate system of a car and talks about the possible source[s] of clogs in the system channels- and the blockage consequences.

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