Flexible impeller: Difference between revisions

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A flexible impeller pump is a positive-displacement pump that, by deforming impeller vanes, draws the liquid into the pump housing and moves it to the discharge port with a constant flow rate. The flexibility of the vanes enables a tight seal to the internal housing, making the pump self-priming, while also permitting bi-directional operation. The output from these pumps tends to be smooth or gentle when compared to the operation of a reciprocating pump (for example). In 1938, Arthur M. Briggs filed a patent for this type of pump.^[1]

Types

Execution: close coupled, bare shaft, with hydraulic motor, belt driven, gearmotor, mechanical speed variator, frequency converter,...
Fittings: DIN 11851, Garolla, BSP, Macon, Triclover, SMS, BSM/RJT,...

Uses

Particularly suitable for transfer of viscous, delicate, and slurry fluids even with high solid content. Widely used in the oenological field, food processing, chemical industry, cosmetic and marine field.

Materials

Pump housing can be made of high grade stainless steel, bronze for marine applications, or other materials.

The impeller can be made of:

Natural rubber (NR) - Excellent for water based liquid, highest mechanical resistance.
Neoprene (CR) - Good balance between chemical and mechanical resistance.
Nitrile (NBR) - Excellent resistance to oils and fats.
EPDM - Best for hot fluid, for acid and alkaline fluids.
Silicone (VMQ) - Best for very high temperature.

The end face mechanical seal can be made of:

Ceramic
Stainless steel
Graphite
Tungsten carbide
Silicon carbide
Elastomers, such as NBR, EPDM, or VITON

References

^ US 2189356

[1] US 2189356

[1]

@@ Line 1: / Line 1: @@
+{{refimprove|date=June 2016}}
-[[Image:Flexible_impeller_pump.gif|thumb|300px|'''FLEXIBLE IMPELLER PUMPS - how it works -''' <br>
+[[Image:Flexible_impeller_pump.gif|thumb|Animated image showing the operation of a flexible–impeller pump]]
-The variation of vane volume during the rotation cause the excellent dry selfpriming feature of the pump.<br>
-Pump is also reversible.]]
+{{Main article|Pump}}
-[[Image:Close coupled flexible impeller pump.jpg|right|thumb|A close coupled flexible impeller pump, made of stainless steel]]
+A '''flexible impeller pump''' is a positive-displacement [[pump]] that, by deforming impeller vanes, draws the liquid into the pump housing and moves it to the discharge port with a constant flow rate.  The flexibility of the vanes enables a tight seal to the internal housing, making the pump [[Pump#Priming a pump|self-priming]], while also permitting bi-directional operation.  The output from these pumps tends to be smooth or gentle when compared to the operation of a [[reciprocating pump]] (for example). In 1938, Arthur M. Briggs filed a patent for this type of pump.<ref>{{patent|US|2189356}}</ref>
-A '''flexible impeller pump''' is a positive-displacement [[pump]] that by deforming the impeller vanes, such the liquid into the pump housing and move it to the discharge port with a no pulsating flow rate. This principle combines gentle pumping with a high dry self-priming action.
 ==Types==
-* '''Execution''': close coupled, bare shaft, with hidraulic motor, belt driven, gearmotor, mechanical speed variator, frequency converter,...
+* '''Execution''': close coupled, bare shaft, with hydraulic motor, belt driven, gearmotor, mechanical speed variator, frequency converter,...
 * '''Fittings''': DIN 11851, Garolla, BSP, Macon, Triclover, SMS, BSM/RJT,...
 ==Uses==
 Particularly suitable for transfer of viscous, delicate, and slurry fluids even with high solid content. Widely used in the oenological field, food processing, chemical industry, cosmetic and marine field.
 == Materials ==
-Pump housing can be made in high grade [[stainless steel]], in [[bronze]] for marine application, but also in other material.<br>
+Pump housing can be made of high grade [[stainless steel]], [[bronze]] for marine applications, or other materials.
-The impeller can be made made of:
+The impeller can be made of:
+[[Image:Flexible impeller.jpg|thumb|A flexible impeller]]
-* '''Natural Rubber (NR)''' - Excellent for water based liquid, highest mechanical resistance.
+* Natural rubber (NR) - Excellent for water based liquid, highest mechanical resistance.
-* '''Neoprene (CR)''' - Good balance between chemical and mechanical resistance.
+* Neoprene (CR) - Good balance between chemical and mechanical resistance.
-* '''Nitrile (NBR)''' - Excellent resistance to oils and fats.
+* Nitrile (NBR) - Excellent resistance to oils and fats.
-* '''EPDM''' - Best for hot fluid, for acid and alkaline fluids.
+* EPDM - Best for hot fluid, for acid and alkaline fluids.
-* '''Silicon (VMQ)''' - Best for very high temperature.
+* Silicone (VMQ) - Best for very high temperature.
-<br>
-The [[end face mechanical seal]] can be made made of:
+The [[end face mechanical seal]] can be made of:
-* '''[[Ceramic]]'''
-* '''[[Stainless steel]]'''
-* '''[[Graphite]]'''
-* '''[[Tungsten carbide]]'''
-* '''[[Silicon carbide]]'''
-* Elastomers: NBR, EPDM, VITON,...
+* [[Ceramic]]
+* [[Stainless steel]]
+* [[Graphite]]
+* [[Tungsten carbide]]
+* [[Silicon carbide]]
+* Elastomers, such as NBR, EPDM, or VITON
+==References==
+{{Reflist}}
 [[Category:Pumps]]
-[[Category:Canadian inventions]]
-[[de:impellerpumpen]]
-[[fr:Pompes a impulseur flexible]]
-[[it:Pompa a girante flessibile]]
-[[nl:Flexibele Waaierpompen]]
-[[pl:Pompy z elastycznym wirnikiem]]
-[[pt:Bombas de Impulsor Flexível]]
-[[ru:Насос с Гибким Импеллером]]
-[[uk:насоси з гнучкою крильчаткою]]