BMF-BCF
19Pages

4. BMF, BFC Series 4. BMF, BCF,BCF, BFC Series BMF BMF BCF BCF BFC BFC Series Series MonoblocGear GearPumps, Pumps, Monobloc Bell-Coupling Gear Pumps. Bell-Coupling Gear Pumps

4.1 MAIN CHARACTERISTICS AND NOMINAL FLOW RATES BMF, BCF and BFC pumps are volumetric gear pumps suitable for transferring lubricant viscous liquids without any suspended solids or abrasive substances. They are self-priming pumps used for a wide range of liquids with a viscosity from 1 to 1.000 cSt. The speed of rotation is chosen according to the viscosity of the liquid. Flowrate range is from 2 to 70 L/min. The standard construction consists of pump housing and cover in cast iron, shafts and gears in carbon steel, O-rings in Viton, sleeve bushings in Steel-Bronze-PTFE and mechanical seal...

BFC pumps are designed to fit, by means of a coupling bell and coupling, an industrial electric motor in compliance with the IEC standard with B14 flange and feet (IM B34). The electric motor can be supplied on request. In table 401 are listed the typical combinations of BFC pumps and B34 electric motors. Fig. 402 – BFC pump, standard version Tab. 401 – B14 flanges available on BFC Series

Table 402 shows the possible flow rates for non-pressurized pumping (Δp=0) and a 46 cSt fluid. The flow rate of gear pumps is virtually proportional to their speed. The selected speeds are the most common speeds at rated power of industrial electric motors at 50 and 60Hz. Tab. 402 – Nominal flow rates Nominal flow rate Qteo [L/min] at Speed n [1/min] Geometrical displacement Vgeo [cm3/rev] 4.2 MAIN OPTIONS The main options available are: • Clockwise rotation (see paragraph 4.3) • Special seals according to liquids and temperatures (see paragraph 4.4) • Options on relief valve (see paragraph...

4.3 SENSE OF ROTATION AND FLOW DIRECTION The standard version of BMF and BCF pumps can operate only in one direction of rotation: counterclockwise watching the electric motor fan. the fan cover. Watching the electric motor fan, the flow direction will be from the left side to the right side and the pressure side (delivery) will be at the right-hand side. The direction of rotation of the motor, when properly connected to the mains, is shown by an arrow placed on On request a clockwise version can be supplied. Fig. 403 – BMF, BCF Series - Sense of rotation and flow direction COUNTERCLOCKWISE...

4.4 SHAFT-END SEALS The standard version is fitted with mechanical seal in ceramic-graphite-FPM. A number of different seals materials can be supplied for different liquids and operating temperatures. On request: • Radial lip-type seal in FPM (Viton), NBR or PTFE (Teflon) • Seal for high temperatures up to 200°C • Reversible mechanical seal 4.5 PRESSURE RELIEF VALVE BMF, BCF, BFC pumps are supplied with a brass pressure relief valve as a standard. It may be used as a safety valve only for short-term operations. When a partial discharge flow has to be drained over a prolonged period of time,...

4.6 VERSION FOR AGGRESSIVE LIQUIDS AND ENVIRONMENTS BMF, BCF, BFC pumps can be supplied in a corrosion and acid-resistant construction. Stainless-steel version Pump housing, cover, shafts and gears in stainless steel and sleeve bushings in AISI 316-Bronze-PTFE. Bronze version Pump housing and cover in bronze, shaft and gears in stainless steel, and sleeve bushings in AISI 316-Bronze-PTFE. Seals and gaskets materials are choosen according to the liquid pumped. Many combinations suitable for corrosive liquids and aggressive environment can be supplied as follows: • Gears in bronze • Sleeve...

4.9 PUMP SELECTION AND PERFORMANCE DATA In table 403 are listed the actual delivery Qeff and required power Pmec for each pump size at different speeds and pressures. The data refers to a mineral oil ISO46 (Kinematic viscosity 46 cSt at 40°C). The rated power for the drive motor should be 20% higher than the required power Pmec. For different viscosities please ask the performances (delivery and power) to our Technical department. As a general rule the flow rate is approximately proportional to the speed. A lower viscosity may lead to a loss of the net delivery and a higher viscosity may...

Speed n [1/min] Geometrical 690 displacement Pressure p Vgeo Qeff Pmec [cm3/rev] [bar] [L/min] [kW] Different viscosities, working pressure, rotational speed and ambient conditions can change performance data shown in the table.

4.10 INTEGRATED ELECTRIC MOTORS AVAILABLE ON PUMPS BMF AND BCF Tab. 404 - Rated Data for integrated electric motors available on pumps BMF – Three-phase 400V / 50Hz Pole Frame Size Available on Pump BMF Size (*) Mechanically different motors. Tab. 405 - Rated Data for integrated electric motors available on pumps BCF – Single-phase 230V / 50Hz Pole Frame Size (*) Mechanically different motors. Available on Pump BCF Size

Tab. 406 - Rated Data for integrated electric motors available on pumps BMF – Three-phase 460V / 60Hz Pole Frame Size Available on Pump BMF Size (*) Mechanically different motors.

4.11 SOUND LEVEL The sound level has been measured in dB(A) at 1m distance, at 1450 1/min with gear oil (viscosity 46 cSt). Sound level dB(A) at pressure

4.12 OVERALL DIMENSIONS AND WEIGHTS Tab. 408 - BMF, BCF overall dimensions and weights with IEC electric motor Frame size Dimensions in mm; tolerances allowed; (*) =

Tab. 409 - BFC overall dimensions and weights for IEC PUMP electric motor SIZE Frame (BFC) size IM

4.12.3 BFC with IEC electric motor F409 Fig. 409 - BFC dimensional drawing with motor L

Tab. 410 - BFC with motor overall dimensions and weights with IEC electric motor Frame size

4.13 SPARE PARTS Fig. 410 – BMF, BCF pumps (mechanical seal version) 59 Fig. 308 – Pressure relief valve details

4. BMF, BFC Series 4. BMF, BCF,BCF, BFC Series Fig. 412 – BFC pumps (mechanical seal version) 32 Monobloc Gear Pumps, Bell-Coupling Gear Pumps 55 10 Pump rear cover 23 Half-coupling motor side 15 Mechanical seal housing 24 Half-coupling pump side 64 Valve adjusting screw