Black powder and condensable sulfur compounds can wreak havoc on natural gas distribution equipment. Plugged lines, scored valve, and clogged filters are all symptoms of this affliction -- both iron sulfide particles and sulfur "gel" adhere to surfaces and accumulate, affecting pipeline geometry and component clearances until flow is restricted or failure occurs. Additionally, high H₂S concentrations can corrode seals in valves and flow control devices -- most commercial filters only provide gas drying and H₂S removal while passing all the solid and condensable sulfur to your equipment.