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Valves in Fugitive Emissions Service
emissions. This allows facilities to address leaks before they cause significant environmental harm or lead to costly fines.
The cost of environmental compliance is just one of the economic consequences of fugitive emissions. Operating costs should also be considered. A boiler fired with natural gas, producing 450 PSI saturated steam and supplied with 230 ° F feedwater, will yield a steam cost of $ 2.89 per 1,000 lb.
A small valve leak can be estimated by comparing it to leakage through an orifice. A 1 / 32” orifice at 450 PSIG will yield a flow of about 10 lbs. per hour, making the cost of the leakage $ 253.16 per valve, per year. The EPA estimates that there is an average of 7,400 valves at a typical refinery or chemical plant, which brings the average cost of leakage from valves per year for a typical refinery or plant around $ 1.87 million. A leak-free steam valve not only saves product but pays for itself quickly in terms of energy savings.
The Role of Bellows Sealed Valves
One challenge in reducing fugitive emissions is that industrial valves operate under dynamic conditions, making it difficult to maintain a longterm seal. However, there is a robust, reliable solution to the challenges posed by fugitive emissions – bellows sealed valves.
Bellows sealed valves are designed to address the limitations of conventional valve designs, particularly in high-risk applications. The bellows seal expands and contracts like an accordion as the valve stem moves up or down, enabling precise control of the valve while maintaining a tight, leakproof seal. Unlike conventional valves that rely on gland packing to seal the stem and bonnet, bellows sealed valves use welded connections.
Violating these regulations is not only detrimental to the environment but can lead to monetary damage.
Consent decrees, used by the EPA, are a penalty to cease or correct certain actions or processes that are polluting the environment. Many major refineries and chemical plants operate under consent decrees that require the installation of equipment to help reduce fugitive emissions. Consent decrees include payments of penalties, which have been as much as $ 40 million in the past.
Regulatory compliance is driving industries to adopt more effective leak detection and repair programs. These programs involve regular monitoring of equipment and facilities to help identify and quantify fugitive
Fugitive emissions are a silent but significant threat. Bellows sealed valves effectively reduce these emissions and ensure compliance with environmental regulations.
Valve World Americas | October 2025 | www. valve-world-americas. com 23