Frequently Asked Questions (FAQs) about Motorized Valves
What are motorized valves used for in industrial refrigeration?
Motorized valves provide precise automatic control of refrigerant flow in response to system demands. In industrial refrigeration systems, these valves regulate liquid feed to evaporators, control hot gas flow for capacity modulation, and manage system pressure in applications requiring accurate, proportional control beyond what solenoid valves can provide.
What types of Hansen motorized valves are available?
Our inventory features Hansen Technologies' comprehensive motorized valve lineup, including Motorized Control Valves (MCV) in sizes from 3/4" to 3", Motorized Expansion Valves (MEV) with precision control capabilities, and various V-Port configurations for different flow characteristics. We also stock complete accessory kits including flanges, gaskets, and adapters for installation flexibility.
How do Hansen's V-Port kits affect valve performance?
Hansen's V-Port kits (like the "V-Port Kit MCV MVP POS4 3/4" CV 2.2") modify the flow characteristics of standard valves, allowing for precise capacity control with different Cv values. These replaceable seat kits enable customization of flow rates and control characteristics, with options like 25% reduced ports for applications requiring finer control at lower flow ranges.
What's the difference between Hansen's MCV and MVP valve series?
Hansen's MCV (Motorized Control Valve) series are standard motorized valves for general flow control applications, while the MVP (Motorized V-Port) valves incorporate specialized V-Port seats for enhanced control characteristics. The MVP series offers superior throttling capabilities and more precise modulation across varying flow requirements, making them ideal for critical control applications.
How do I choose the right Cv value for my motorized valve?
Cv (flow coefficient) values indicate the flow capacity of the valve, with higher numbers allowing greater flow. Selection depends on your required flow rate, pressure differential, and control precision needs. Hansen offers various V-Port kits with Cv values ranging from 0.8 to 16 (such as "Kit V-Port, 1 1/4" MCV, CV 16-4, MVP P3"), allowing you to match valve characteristics to your specific application.
What connection options are available for Hansen motorized valves?
Hansen provides multiple connection options through their flange kits, including socket weld (SW) flanges like "Hansen 200 Flange 2" Socket Weld Kit," weld neck flanges such as "Hansen 100 Flange 1" Weld Neck Kit," ODS connections, and union kits. These options ensure compatibility with virtually any piping configuration in industrial refrigeration systems.
How do Danfoss motorized valves differ from Hansen models?
Danfoss motorized valves typically feature integrated electronic controllers and are often designed for specific refrigerants and applications, while Hansen valves offer more modular designs with interchangeable components. Both manufacturers provide high-quality solutions, with Danfoss often focusing on packaged systems and Hansen specializing in custom-configured industrial applications.
What maintenance is required for motorized valves?
Regular inspection of motorized actuators, checking for proper valve stem movement, and periodic replacement of gaskets (such as "Hansen Gasket for 1-1/2" to 2" Flange") are essential maintenance tasks. Hansen's modular design facilitates maintenance with replaceable components like V-Port seat kits and flange gaskets, allowing for service without complete valve replacement.
How are motorized valves controlled in refrigeration systems?
Hansen motorized valves can be controlled by various signals including 4-20mA (as in "Hansen Motorized Expansion Valve - 24VAC/DC, 4-20mA"), allowing integration with PLCs, temperature controllers, and building automation systems. These valves provide proportional control capabilities, enabling precise modulation in response to changing system conditions rather than simple on/off operation.
What is Hansen's Flow Controller and how does it differ from standard motorized valves?
The "Hansen Flow Controller NH3 14 GPM 3/4 Socket Weld Flange" is a specialized motorized valve designed to maintain constant flow rates regardless of pressure fluctuations. Unlike standard motorized valves that control based on position or input signal, flow controllers actively adjust to maintain your specified flow rate, making them ideal for liquid feed applications where consistent flow is critical.
