An excess flow valve (EFV) is a valve that's designed to monitor and control the flow of a gas or liquid through a service line. If gas begins flowing too quickly, the EFV will be triggered to control this flow until repairs can be made. This mechanical safety device can be used in applications ranging from gas lines to high-pressure plant lines to hydraulic systems.
But with several types of valves available, how can you know which one is right for your application? What features should you consider when comparing and contrasting different excess flow valves? Learn more about the similarities and differences between the three types of excess flow valves ChemTec offers: EFVs, HPEFVs, and EFVMRS valves.
EFV Series Adjustable Excess Flow Valve
This EFV is designed to prevent the uncontrolled flow of liquids and gases. It offers a positive shut-off when the gas flow exceeds a certain set limit. To resume normal flow, a bypass or controlled bleed releases the excess pressure built up. allowing the valve to reset automatically. The EFV series is field adjustable and available in both brass body and 316 stainless steel. It is most commonly used in applications like toxic gas and liquid releases, gas analyzers, and hydraulic control where a higher-pressure valve isn't needed.
High-Pressure Safety Excess Flow Valve (HPEFV)
Like the EFV series, the HPEFV safety valve series prevents the uncontrolled flows of liquids and gases by immediately detecting and responding to excess flows. The HPEFV controls high-pressure excessive flows in applications like hydraulic systems and high-pressure plant lines. It's exclusively available in 316 stainless steel, with a maximum pressure of 6000 PSIG. The HPEFV also detects, which can make it far more responsive than other similar valves. Because a leak in a high-pressure line can potentially be dangerous, having an HPEFV to shut off problems before they start can be invaluable.
EFV MRS Series Adjustable Excess Flow Valve
What sets the EFVMRS apart from other excess flow valves is its manual reset. This full shut-off EFV also has a bypass system that allows you to bleed the line and equalize its pressure. Like the EFV series, it's available in either brass or 316 stainless steel. This EFV is used in plant lines, gas distribution systems, and gas analyzers, among other applications.
Having the right kind of EFV installed in your gas lines, plant lines, hydraulic lines, or other high-pressure lines can save you from expensive and even potentially dangerous leaks. For more than 50 years, ChemTec has provided high-quality excess flow valves for a wide variety of applications. Visit our website to learn more about the product lines we offer.