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GATE VALVE LUBRICATION Introduction | Plug Valve Lubrication | Gate Valve Lubrication | Ball Valve Lubrication                                    Examples of Product Applications | Product Range - Application & Service Chart Lubricant Injection Equipment | Oilfield Lubrication & Maintenance  OCTG: Clear-Run Material Safety Data |Regain & Maintain Wellhead Gate Valve Integrity | Asset Integrity | Valve Lubricant 601 Richard Grantham, Divisional Manager - Oil & Gas  +44 (0) 7768 140 206            Hassan Fazel, Middle East Technical Sales Manager - Oil & Gas U.A.E  0097 150654 5524   The key functions of the gate valve lubricant are: To provide an integral lubricating film between the gate & seat and  the threaded stem, where applicable.  The lubricant film must withstand  the high interfacial contact stress between gate and seat surfaces. To displace corrosive chemicals and fluids from the valve cavity and provide a barrier to prevent further ingress of these and contaminants such as sand. A high performance valve lubricant can also deliver secondary benefits: Provide additional corrosion protection to the 'exposed' internal valve components, particularly if the metallurgy is underspecified. Restore valve integrity, by providing a sustained leak sealing capability. Gate & Seats have critical sealing surfaces Sealing Leaking Gate Valves Through many field trials, RS Clare valve lubricants have been proven to seal leaking gate valves for sustained periods, where other valve lubricants have been unsuccessful.  It should be noted that in some cases, where the damage to sealing surfaces is high, the only solution is to replace damaged components, and then immediately employ a high performance cavity lubricant.  75% success rate. Hydrocarbon Resistance One fundamental requirement of the valve lubricant is resistance to liquid and gas phase hydrocarbons.  For comparison, a standard lubricant GP Valve Grease is tested against Clare Valve Lubricant 601.  A sample of each lubricant is applied to a glass plate, and then placed within a container of hydrocarbon fluid.  The fluid breaks down the GP Valve Grease very quickly.  In the valve, the grease will be washed out of the cavity when cycled just a few times.  Valve Lubricant 601 is unaffected by the hydrocarbon fluid, regardless of exposure time, thus providing long term cavity retention.