Challenges in valve reliability Many types of valves – including ball, gate, butterfly and wedge – are used in the oil and gas industry as control valves, requiring accurate and repeatable response. In production, transportation and processing, these valves must deliver reliable performance – often in severe service environments, handling harsh materials under pressure, exposed to extreme heat or cold, and even when not cycled for many years. Valve problems caused by inadequate lubrication and sealing, abrasive contaminants, or severe-duty service can typically include: • Galling and scoring • Seal, seat or packing failure • Corrosion and internal and external leakages of valves • Sticking and seizing, leading to imperfect response to control signals Proper lubrication of valve components can reduce wear; improve durability and dependability; and help deliver pipeline content safely, efficiently and responsibly. Such lubrication also can help preserve valve seal, seat and packing materials to ensure leak-free operation.