Analisa Pengaruh Jenis Mechanical Seal Terhadap Unjuk Kerja Pompa Sentrifugal

Minyak bumi merupakan senyawa hidrokarbon yang dihasilkan dari sisa-sisa hewan atau fosil yang telah mati dan tertimbun selama berjuta-juta tahun yang lalu. Dalam waktu yang sangat lama bahan-bahan tersebut tertimbun oleh bebatuan sedimen, dan akibat dari proses kimia dan fisika serta adanya tekanan dan temperatur yang tinggi maka terbentuklah minyak mentah. Minyak mentah yang terdapat didalam Perut bumi tidak keluar dengan sendirinya, untuk itu diperlukan alat pendukung yang tepat digunakan seperti pompa. Pompa yang dimaksud disini adalah pompa yang digunakan untuk menginjeksikan air panas kedalam Perut bumi. Pompa yang sering digunakan adalah pompa sentrifugal. Pompa sentrifugal memiliki salah satu komponen yang penting yaitu mechanicalseal. Mechanical seal adalah suatu komponen dalam sebuah konstruksi pompa yang berfungsi sebagai penghalang atau pengeblok keluar masuknya cairan, baik itu fluida proses maupun pelumas. Penggunaan jenis mechanical seal yang tepat sangat penting bagi unjuk kerja pompa sentrifugal. Untuk itu perlu diteliti pengaruh jenis mechanical seal terhadap unjuk kerja pompa sentrifugal. Tujuan penelitian ini adalah untuk mengetahui pengaruh jenis mechanical seal terhadap unjuk kerja pompa sentrifugal. Selain itu untuk mengetahui jenis mechanical seal yang paling baik unjuk kerjanya. Penelitian ini dilakukan secara eksperimen dengan menguji pompa sentrifugal yang menggunakan jenis mechanical seal plan 11, plan 21, dan plan 23. Dari hasil pengujian diperoleh bahwa jenis mechanical seal memiliki pengaruh terhadap unjuk kerja pompa sentrifugal. Jenis mechanical seal yang paling baik unjuk kerja pompa sentrifugalnya adalah jenis mechanical seal Plan 23. Dimana jenis mechanical seal plan 23 memperoleh effisiensi yang paling tinggi dari jenis mechanical seal yang lain, yaitu sebesar 70 %. Sedangkandaya pompa yang diperoleh paling rendah dari jenis mechanical seal yang lain, yaitu sebesar 135 HP. Dan untuk temperaturnya mechanical seal ini paling rendah, yaitu sebesar 84,2

Development of a Single Mechanical Seal equipped with a High-Pressure Containment Seal for Multiple Fluid Pipeline Pumps

LecturesThis paper discusses the critical design aspects, calculations, laboratory verification testing and field experience of a mechanical seal arrangement for multiple fluid Pipeline Pumps. The seal cartridge consists of a single wet lubricated mechanical seal on the product side in combination with a high-pressure containment seal on the atmospheric side. The single mechanical seal has been designed to operate in a product range from the flashing hydrocarbons ethane, propane, butane all the way up to non-flashing hydrocarbons like Natural Gasoline. Basically the single seal runs product lubricated in the media with a specific gravity range of 0,35 up to 0,65 and is designed for a pressure window up to 100bar, respecting the Pipeline Pressure. To assure this, a lift off of the mechanical seal faces at all media and at all operation conditions was targeted. To achieve this the functional components of the mechanical seal were subject of an extensive performance calculation and optimization with FEM (Finite Element Method. The mechanical seal concept includes a containment seal which withstands the full pipeline pressure in the unexpected event of a catastrophic mechanical seal failure of the single product side seal. This means massive leakage cannot leave the seal gland in an uncontrolled way under any case. To achieve similar safety and environment protection with a mechanical seal in a multiple fluid pipeline pump, conventionally a double pressurized mechanical seal with a pressurized supply system was needed. The proposed mechanical seal design provides a reliable pump sealing solution for these critical applications with a “single mechanical seal” in combination with a “high-pressure containment seal”. It provides the performance advantage and the safety philosophy of a double pressurized seal arrangement with the more costefficient single seal arrangement

Failure Analysis and Modification Analysis for the Seal Face in Mechanical Seal

This report discusses the final draft of the chosen topic, which entitled Failure Analysis and Modification Analysis for the Seal Face in the Mechanical Seal. Seal face crack propagation is one of the major causes which lead to failure of mechanical seal therefore analyses on the seal beforehand is important. Normally failure happens due to this crack which may happen as early as after two months after the installation of the mechanical seal

Mechanical Seal Fundamentals

Short Cours

High pressure mechanical seal

A relatively impervious mechanical seal is formed between the outer surface of a tube and the inside surface of a mechanical fitting of a high pressure fluid or hydraulic system by applying a very thin soft metal layer onto the outer surface of the hard metal tube and/or inner surface of the hard metal fitting. The thickness of such thin metal layer is independent of the size of the tube and/or fittings. Many metals and alloys of those metals exhibit the requisite softness, including silver, gold, tin, platinum, indium, rhodium and cadmium. Suitably, the coating is about 0.0025 millimeters (0.10 mils) in thickness. After compression, the tube and fitting combination exhibits very low leak rates on the order or 10.sup.-8 cubic centimeters per second or less as measured using the Helium leak test

High pressure mechanical seal

A relatively impervious mechanical seal is formed between the outer surface of a tube and the inside surface of a mechanical fitting of a high pressure fluid or hydraulic system by applying a very thin soft metal layer onto the outer surface of the hard metal tube and/or inner surface of the hard metal fitting, prior to swaging the fitting onto the tube. The thickness of such thin metal layer is independent of the size of the tube and/or fittings. Many metals and alloys of those metals exhibit the requisite softness, including silver, gold, nickel, tin, platinum, indium, rhodium and cadmium. Suitably, the coating is about 0.0025 millimeters (0.10 mils) in thickness. After swaging, the tube and fitting combination exhibits very low leak rates on the order or 10.sup.-8 cubic centimeters per second or less as meaured using the Helium leak test

A novel mechanical seal design with superior thermal characteristics

A mechanical face seal is an important component of variety of pumps used in chemical, petrochemical and process industry. The primary function of a mechanical seal is to prevent leakage of the process fluid from the pump housing and shaft to the environment. The factors that affect the performance of a mechanical seal to leak are friction, wear and its thermal characteristics. Improving upon the thermal characteristics of a mating ring in a mechanical seal would enhance its performance. Implanting a heat exchanger in the mating ring hold great promise for improving the performance of mechanical seals from the viewpoint of reducing heat at the interface and hence enhance the performance of the mechanical seal. To reveal what affect the implanted heat exchangers can have on the thermal characteristics of different seals, in this thesis, three different designs of mating rings were tested in a test rig and the results were compared to a conventional seal in this thesis. A new design of a mechanical seal with an implanted heat exchanger in its mating ring is reported. The mating ring incorporates an internal channel in which a coolant (either a gas or a liquid) flows to remove heat from the seal face. Prototypes were built and tested in a pump. Results are indicative of effective cooling and improved performance when compared to a conventional seal. A Coating on the mating ring was successfully implemented. A simplified heat transfer analysis using the results of the finite element method is also presented for all the seal designs

Analisa Pengaruh Jenis Mechanical seal terhadap Unjuk Kerja Pompa Sentrifugal

Abstrak Minyak bumi merupakan senyawa hidrokarbon yang dihasilkan dari sisa-sisa hewan atau fosil yang telah mati dan tertimbun selama berjuta-juta tahun yang lalu. Dalam waktu yang sangat lama bahan-bahan tersebut tertimbun oleh bebatuan sedimen, dan akibat dari proses kimia dan fisika serta adanya tekanan dan temperatur yang tinggi maka terbentuklah minyak mentah. Minyak mentah yang terdapat didalam perut bumi tidak keluar dengan sendirinya, untuk itu diperlukan alat  pendukung yang tepat digunakan seperti pompa. Pompa yang dimaksud disini adalah pompa yang digunakan untuk menginjeksikan air panas kedalam perut bumi. Pompa yang sering digunakan adalah pompa sentrifugal. Pompa sentrifugal memiliki salah satu komponen yang penting yaitu mechanicalseal. Mechanical seal adalah suatu komponen dalam sebuah konstruksi pompa yang berfungsi sebagai penghalang atau pengeblok keluar masuknya cairan, baik itu fluida proses maupun pelumas. Penggunaan jenis mechanical seal yang tepat sangat penting bagi unjuk kerja pompa sentrifugal. Untuk itu perlu diteliti pengaruh jenis mechanical seal terhadap unjuk kerja pompa sentrifugal. Tujuan penelitian ini adalah untuk mengetahui pengaruh jenis mechanical seal terhadap unjuk kerja pompa sentrifugal. Selain itu untuk mengetahui jenis mechanical seal yang paling baik unjuk kerjanya. Penelitian ini dilakukan secara eksperimen dengan menguji pompa sentrifugal yang menggunakan jenis mechanical seal plan 11, plan 21, dan plan 23. Dari hasil pengujian diperoleh bahwa jenis mechanical seal memiliki pengaruh terhadap unjuk kerja pompa sentrifugal. Jenis mechanical seal yang paling baik unjuk kerja pompa sentrifugalnya adalah jenis mechanical seal Plan 23. Dimana jenis mechanical seal plan 23 memperoleh effisiensi yang paling tinggi dari jenis mechanical seal yang lain, yaitu sebesar 70 %. Sedangkandaya pompa yang diperoleh paling rendah dari jenis mechanical seal yang lain, yaitu sebesar 135 HP. Dan untuk temperaturnya mechanical seal ini paling rendah, yaitu sebesar 84,2 F

Up-thrust and Seal Failures on a Vertical Can Pump

Case StudyPine Bend, MN, 12x10, 9 stage vertical can pump, 600 hp, 1780 rpm A new smaller, higher efficiency motor was installed to replace the old motor and shortly after numerous mechanical seal failures occurred. The motor is a solid shaft motor that is connected to the pump with a rigid coupling. The motor hub is connected to the motor shaft with a split ring. On startup it was observed that the pump shaft would move about 3/8 inch upward and the mechanical seal would leak

Improvement of Rotating Equipment Reliability Using Optical Metrology

Case StudyExtreme thermal piping displacements were thought to be the root cause for the observed failures at a large refinery, namely 9 mechanical seal failures in 3 months. Optical Metrology methods were used to identify failure modes of critical service vacuum bottoms pumps. The testing involved the use of both photogrammetry and digital image correlation to show how the large thermal displacements of the piping contributed to the mechanical seal failures. A high speed optical meteorology rotodynamic study was also performed to observe the effects of the piping displacements on the operation of the pump