Pump base plate

Figure 7-14 Pump base plate and motor as well as the position of the bearing housing with impeller document the explosion. Courtesy of Eastman Chemical Company. 

Pumps, rotary screw moyno cast iron with pump, base plate, V-belt drive but excluding motor. FOB cost 10000 at flow rate = 5.5 L/s with n = 0.5 for the range 1-5.5 and n = 0.6 for the range 5.5-25. L+M = 1.6-2.2. L/M = 0.15. Factor without motor, X 1.00 with TEFC motor, X 1.2. 

Process facilities susceptible to earthquakes should be provided with suitable restraints for fire protection systems. The extent of these restraints are normally dictated by local ordinances and primarily concern the bracing of pipework and adequate securing of firewater pump base plates and controller panels for earthquake forces. Pump houses should be adequately constructed and braced so they will not collapse onto the firewater pump or distribution piping. 

At Pump Installation Be sure the motor shaft centerline is below the pump shaft centerline so that it can be shimmed upward. Make sure the motor mount boltholes have sufficient play to allow for some lateral adjustment. Many pumps and motor assemblies are shipped from the factory on a common channel iron base plate. The manufacturer alleges that they arc already aligned at the factory. You need to verify and correct this alignment in all cases. 

The base should be sufficiently strong to withstand the machinery weight and minimize vibrations. Five times the mass is the rule. If the pump, motor, and base plate weighs 1,000 lbs, the foundation should weigh at least 5,000 lbs. 

Many data cells in the CCPS Taxonomy use equipment boundaries found in available generic data sets in which equipment and service is similar to that in the CPI. The boundaries established for other data cells were generally combinations of normal equipment modules—such as pump, seals, coupling, motor and base plate, or refrigeration units—and functionally interdependent basic and auxiliary components, such as motor controllers. Boundaries may change as greater amounts of equipment reliability data become available. 

In another laboratory, a vacuum pump was installed on a shelf buUt into a two-foot knee-hole well above the floor level. It was out of the way, off the floor, and easy to service. Noise was substantially reduced by attaching rubber stoppers to the pump s base plate as vibration absorbers. Connection to equipment was through a hole in the work top. 

Pumping unit Driver and coupling Base plate... 

The horizontal pumps are available for capacities up to 900 m /h (4000 gahmin) the vertical in-line pumps, for capacities up to 320 m /h (1400 gahmin). Both horizontal and vertical in-line pumps are available for heads up to 120 m (400 ft). The intent of each ANSI specification is that pumps from all vendors for a given nominal capacity and total dynamic head at a given rotative speed shall be dimensionally interchangeable with respect to mounting, size, and location of suction and discharge nozzles, input shaft, base plate, and foundation bolts. 

Figure 8.8 costs include the pumping unit, coupling and gear, mechanical seal, and the base plate. All are FOB fabrication shop costs for 2001. The basis of material is cast iron. Use Table 8.24 for Fm. See Table 8.25 for associated cost factors. 

Forced convection can also arise from the movement of electrolyte solution over a stationary working electrode. In a channel electrode, the electrode is embedded smoothly in one wall of a thin, rectangular duct through which electrolyte is mechanically pumped [3, 6, 26, 27]. The design of the flow cell consists of two plates sealed together, with typical dimensions of 30-50 mm in length, <10 mm in width and a distance between the plates of less than 1 mm (the cell height). The electrode is embedded either at the centre of the base plate or attached to the centre of the cover plate by means of an adhesive. 

Fig. 2. A schematic diagram of the skull melting apparatus. Not shown are protective screens around the vacuum cylinders, a transparent fused silica sleeve between the skull crucible and the r.f work coil, and a fume hood above the apparatus. (1) Skull crucible (2) work coil (3) to r.f. generator (4) 12-port vacuum collar (J) vacuum quick-connect coupling (6) Teflon insulating flange (7) water supply (in and out) for crucible (S) motor-driven gear system for lowering crucible (9) base plate and supporting frame, (10) 45.7-cm diameter X 30.5 cm high Pyrex vacuum cylinders (11) aluminum top plate (12) to mechanical pump.

The synthesis equipment consists of a stainless steel cylinder with an inside diameter of 100 mm and a height of 265 mm and is shown schematically in Fig. 1. The wall of the cylinder is 3 mm and the top plate 10 mm in thickness. The cylinder is mounted with 12 MX10 stainless steel screws on a base plate made of stainless steel. The base plate is furnished with a rabbet which contains the O-ring Teflon seal between the cylinder flange and base. In addition, three 6-mm o.d. stainless steel lines are welded to the base. One line leads to a vacuum pump, another line to the gas bottle, and the third to a mechanical safety valve which opens for pressure higher than 75 atm. The inlet line has connections to a... 

Fig. 1. Apparatus for Li 3N synthesis. (1) Base Plate (2) pedestal (S) crucible (4) vessel (5) thermocouple (6) to vacuum pump (7) valves (S) gas bottle (9) manometer (10) safety valves (11) N2 gets inlet.

Fig. 2. Apparatus for LijN crystal growth. (J) Vessel (ss) (2) seed holder (3) 7V2 gas inlet (4) observation window (5) cooling tubes (6) base plate (Ni) (7) electrodes (Ni) (g) thermocouple (Pt/Pt-10% Rh, inconel shielded) (9) manometer (.10) to vacuum pump (11) furnace (ss) (12) heat shields (Mo) (13) N2 gas outlet (14) j f2 gas bottle (15) flow meter (16) valves.

The nickel base plate (6) supports water-cooled electrodes made of nickel (7), a thermocouple (8), and a pipe leading to a manometer (9) and to a vacuum pump system (10). 

One bus bar is insulated from the base plate. The tungsten tube is surroimded by a copper sheet box, to which a tightly woimd cooling coil is soldered. The brass baseplate is drilled for two other tubes, which serve as connections for a McLeod gauge and a vacuum pump. 

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