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Mechanical seal parts are highly engineered with very close tolerances and any upset in the pump or associated system can cause seal failure, including: Approximately 70% of the pumps removed from service for maintenance are victims of mechanical seal failure. The mechanical seal is the most likely part of the pump to fail. SMU – Multiple Screw Pump without timing gears (screws drive each other).SMT – Multiple Screw Pump with additional timing gears.GI – Rotary Internal Gear Pump (with crescent).GEU – Rotary External Gear Pump (untimed).GET – Rotary External Gear Pump (timed).LM – Rotary Lobe Pump with multiple lobes on each rotor.LS – Rotary Lobe Pump with a single lobe on each rotor.VS – Rotary Vane Pump with the vane in the stator.VR – Rotary Vane Pump with the vane in the rotor.Under the API 676 Standard, there are various codes that define the type of rotary positive displacement pump. The standard provides design criteria for all types of rotary PD pumps. API 676 Rotary Pump Standard – See All Rotary, PD Pumps In StockĪPI 676 is the API standard for rotary, positive displacement pumps. The standard defines topics such as maximum and minimum speeds, pulsation and vibration control requirements, and testing requirements.
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Each of the following pump types is a sub-category of the API 610 Centrifugal Pump Standard.ĪPI 674 Reciprocating Pump Standard – See All Plunger Pumps In StockĪPI 674 is the API standard relating to reciprocating positive displacement pumps and includes design criteria for both direct acting reciprocating pumps and power-frame type pumps (pumps driven by a motor via a crankshaft). The number is used to differentiate more detailed configuration options within each section.īelow are simple definitions for each API pump type. The letters are used to define the main different pump types, where OH stands for Overhung, BB stands for Between-bearings, and VS stands for Vertically Suspended. These are called out by a set of two letters followed by a single number. Within the API 610 Centrifugal Pump Standard, there are various configuration codes for different types of centrifugal pumps. It provides design criteria for the design of the actual centrifugal pump, as well as how the centrifugal pump is to be tested, and what type of base it is to be mounted on. API 610 Centrifugal Pump Standard – See All Centrifugal Pumps In StockĪPI 610 is the API standard relating specifically to centrifugal pumps and centrifugal pumping systems. Power Zone is involved daily with the API standards relating to pumps and pump components, as well as API guidelines for pump testing and API design criteria for pump baseplate design.Įven though there is no overall rule or law that API standards must be adhered to (many pumps and equipment are built to no standard at all) the API standard is often referred to in pumping systems when the highest quality is needed.īelow is simple explanations of some of the many different API standards for pumps. Although these standards may be referred to alongside API, they are not otherwise related, and although some of these standards overlap, each one is generally focused on a different sector.ĪPI standards include design criteria for a wide range of equipment and components. There are other standards, such as ISO, ASME, NEMA, or ANSI. API Pump Type Definitions | Understanding API StandardsĪPI (American Petroleum Institute) is a set of standards used to define systems, tests, and equipment design, mainly in the Oil & Gas industry.