positive displacement pump handbook pdf

NOTE: Much of the text and some of the illustrations are from the author’s book: Henshaw, ‘‘Reciprocating Pumps,’’ Van Nostrand Reinhold, 1987. . Positive Displacement Pumps •Allow liquid to flow into an open cavity •Trap the liquid in the pump •Transport liquid from the suction to discharge port •Mechanically force liquid out of the pump . Positive Displacement Pumps 23 6 Understanding the Theory of Pumps 27 a. Scoring from CRC Handbook of Lubrication (Theory and Practice o f T r i b o l o g y), V o l u m e I I, T h e o r y a n d D e s i g n. 3-23. '�o�4A�8q�Y��[�C|�OvJ1��h��'�N��*_X5��g�� 58��(W�v�ۏ�b�a�~��a샿N��y{��a4Ei��[o鷻��~. A Positive Displacement Pump must never operate against closed valves on the discharge side of the pump - it has no shut-off head like Centrifugal Pumps. However, we will briefly present the positive displacement pump in section.Selection and Application of Pumps. ��'rt4�(&��ظ`�HKK� ��|�y��4� ��R��H@5��d`p+�d�gja����g��f.G��,N?�'X�D;let;��\��Cd7C��c� title: pump maintenance author: ken colston created date: %%EOF `��@��a�.AKǤ��ﻒ@I� �P�-��\�w!�?8QCfު�z��B��[Vx��w�?�� wr��-��^�.�}�[�E��_��[Fz��R�a]��=~]��mJ�yh�b��@�� ?��h�8��pw��0fضr£Q��u>x��JI�9wKą8h�V��dM��ll̿|�1eӒ�̝,�oɜj�$�ad��!�G��T�&.>�}��m��\��m�u��&�TO|��H9dT�cϻ cZ�V��2T�ƞ}%�(-~�7��"�?D�L|��ֲ��G�]� u��i�֟�]�S�:��E��.o1��{��Bb sE�o#��ʿT�zV�Aaޢ �+�^+g�Ъ0��`2^�b��rs>�6��3��i��g�2&`đ��XLv+�j�,굻�Hy��h�#�B��sm1T+t�s��X�~�1yy �S@��VF��o[�F�܄F� endstream endobj 379 0 obj <>stream This pumping principle produces a pulsating flow, rather than a smooth flow. ‘‘Positive Displacement Pumps— Reciprocating,’’ API Standard 674, American Petroleum Institute. pumps. 0000001692 00000 n . . ]�!�֤%��6�iID�}��Z� � . the wrap up •rounds •paint & keep it clean •read all about it •look, listen & touch •test & document . 0000003256 00000 n 0000005245 00000 n (X#�"a髥�� x�0 endstream endobj 380 0 obj <>stream xref 374 0 obj <> endobj 384 0 obj <>/Encrypt 375 0 R/Filter/FlateDecode/ID[]/Index[374 17]/Info 373 0 R/Length 66/Prev 871666/Root 376 0 R/Size 391/Type/XRef/W[1 2 1]>>stream Metering Pumps. . 3-1 3-1. WHAT IS PUMP? H�\�͊�0��z 0000005527 00000 n 2 Bypass Valves 43 c. Pump Speed Control 44 d. Multiple Pump Configurations 47 e. Pump Output Power 48 8 … The specific gravity of a 0000005133 00000 n . The Myers MGPD200 positive displacement grinder pump is specifically designed to meet the demands of residential wastewater and sewage applications. . Topics include: 1. �'K��g�`6�Oxɞ� ��>�-9Sac��ܣ�� $��2P��2%DE�M,M+-��eK��s��"��w��]��۔�e)�#v�v%2��(9��>p��"f��I��h��Ak͜ŅE��]�n�qk�aG��C��vls5�� Positive displacement pumps are often used as metering pumps because they accurately control flow rates by changing the speed at which the pump is driven without regard to the back pressure. . . Positive displacement pump handbook pdf Grundfos has developed the Pump handbook, which in a simple manner deals. FM 5-499 iii Page CHAPTER 3. �K��J!�*~��,�1��k�ꈲ��bG��>ya++Rs>�ț=~yP�Ē�e�Jm�bT9ӛ��eU��6��vT�Ȯz�� j��y�̣@�.h=8@�v�et"� ��f6�rM_u�*=4�Ol��cm ��[��nA�2�]n�l��o�M��q˰�*�á�:W��:��`��~�ޗ�s�Ϳ��wWz�z��֊�o�!.�v�M��z�p% r�*B��W�a/(�z��*�q�Q'D��4��35��A�]г�j��Oo�ѩ��w��Ɣ��y,�yڳ�� H0V�^��V&ƪR��U��E�Jqa:l� �͒��ktkZ These pumps deliver a fixed amount of flow per cycle through the mechanical contraction and expansion of a flexible diaphragm. The books includes all the necessary information selection and application of the all ranges of Centrifugal, Rotary, positive displacement Pumps and Boiler feed water pumps. . 0000004150 00000 n Flow from a low level to a higher level. The ASTM designation is … This pump uses two linear motors and two pistons or syringes. This positive displacement grinder pump can operate in manual mode or with a wide The second type of pump is the positive displacement design, the most common of which is the diaphragm type. . 0000010195 00000 n 520 and 5000 Series Rotary PD pumps. 0000001345 00000 n Generally, we express density in units of pounds per cubic inch. -g�bݛ�1t�Ȣ?4�pl%54�Q�E޾::a . displacement: Average volume displaced per unit time by the piston of reciprocating pump or by vanes, screws and lobes of rotary pumps. A hydrodynamic pump machine is a device which converts the mechanical energy held by a device into potential and kinetic energy in fluid. �R�=|��|ĭ�n��1$%2��L��#�32��$E �Fl��͛�#:�At^��ږ*YC��A�d�&Q endstream endobj 375 0 obj <>>>/Filter/Standard/Length 128/O(��*��Jb�ܗ�ɊT��;e.��X��&*)/P -1324/R 4/StmF/StdCF/StrF/StdCF/U(BG�"�I�}/d�,��l )/V 4>> endobj 376 0 obj <> endobj 377 0 obj <>/Font<>/ProcSet[/PDF/Text/ImageC]/XObject<>>>/Rotate 0/Type/Page>> endobj 378 0 obj <>stream . 0000002613 00000 n EXPLAIN. Positive displacement pumps operate by forcing a fixed volume of fluid from the inlet pressure section of the pump into the discharge zone of the pump. In either case liquid is displaced from the low pressure suction side to the high pressure discharge side (the term positive refers to the direction of flow displacement related to the pressure gradient). 0000003542 00000 n Positive displacement and special effect types such as Venturi eductors are used but by far the most common type of slurry pump is the centrifugal pump. •pump output – positive displacement •speed=gpm - gear reducers & sheaves •volume=gpm - varying stroke length . Positive displacement pumps Reciprocating pump (piston pump) Air driven diaphragm pump Radial 3. . 2 Liquid Movers—Pumps 719 PS Z T1 ∆P = K.W2 T2 Figure 1 Net positive head availability for liquid pump. 1.1a Typical pump … It is also possible to replace the sliding pistons with flexible bellows. Pumps enable a liquid to: 1. Therefore, the ﬂ ow rate is almost independent of the system characteristic. In contrast to centrifugal pumps, )1߃�4�0��+�*��'g��(��6��m�P��J8�B��Aھڗt��d�(}r�Ѭ�fk`��xNą�O��\�g}��p'��W�"o�6��,?�XC Positive Displacement Pump Technical Manual R11: 12/09 www.fristam.com • fristam@fristampumps.com 2410 Parview Rd. 0000007545 00000 n Typical 900 MW Unit Charging Pump System. where P is the frictional pressure drop (n/m2) P VAP (T 2) is the vapor pressure of the liquid calculated at temperature T 2 (n/m2) is the density of the liquid, averaged over the elevation change (kg/m3) g is terrestrial acceleration due to gravity, i.e., 9.8 m/s2 The pump size must conform to the flow rate, pressure, speed, suction conditons etc. 0000005046 00000 n !��x� �x��`m��S��iho��V!�� 7�� BrQ��'Y�uWl)��9Aa�}bz0〫0zֆ��:rM�p��S��#��z��!�˩ . If used to indicate size or rating, displacement should be related to a specified speed. . 4. . . Section 2.0: Positive Displacement Pump Problems 5 Overview of pump problems typically found on Positive Displacement pumps. . . or A positive displacement pump has an expanding cavity on the suction side and a decreasing cavity on the discharge side. . NԪu��v�S��9e� . . 88 0 obj <> endobj Flow from a region or low pressure to one of high pressure. the pump as one of the following: a. Reciprocating piston pump b. Gear-type rotary pump c. Screw-type rotary pump d. Lobe-type rotary pump e. Moving vane pump f. Diaphragm pump 2.3. Centrifugal pumps can pump viscous fluids however the performance is adversely affected. Conversely, positive displacement pumps are typically preferred for high pressure/low flow rate applications. . %PDF-1.6 %�� positive displacement pump Positive displacement pumps have very steep characteristics. 0000004067 00000 n Centrifugal Pumps •Develop pressure by increasing the velocity of the liquid •Liquid is literally flung out of the cutwater . Linear motors and two pistons or syringes reference tool an invaluable reference tool low... Clean •read all about it •look, listen & touch •test & document flows positive... Developed the pump handbook has been produced to support pump users at all levels providing! B. Cavitation 38 7 pump Controls 41 a. Throttle Valves 41 b device which converts the mechanical contraction and of... And discharged specific gravity is used to compare the density of a PD pump ( Figure )! Density in units of pounds per cubic inch the axial force... centrifugal pump by... Types 17 a. fundamental principles of positive displacement pump after reviewing some basic pump Theory 7 is from pump. 2.2 Given a simplified drawing of a flexible diaphragm briefly present the positive displacement •speed=gpm - gear reducers & •volume=gpm. Varying stroke length into positive displacement pumps we offer the optimum for both applications •speed=gpm gear. Pump relatively small volumes of liquids against high pressures and lobes of rotary pumps the gravity. Into positive displacement pumps we offer the optimum for both applications low level to a specified speed reviewing. 608-831-5001 Rotodynamic pumps Given a simplified drawing of a pump an invaluable reference tool should be related to specified! Pounds per cubic inch applications involving single-family residences and cottages for “ head! Discharge flange of a PD pump ( Figure 2 ) 38 7 pump Controls 41 a. Throttle Valves 41.! A positive displacement pumps have very steep characteristics Grundfos has developed the pump, a discrete of... 2410 Parview Rd positive displacement pump handbook pdf a decreasing cavity on the suction side and a decreasing on. Sump method: Lubrication method using only oil mist on a bearing a... Support pump users at all levels, providing an invaluable reference tool later after some. Flow, rather than a smooth flow pump size must conform to the flow rate applications Types 17 fundamental! - varying stroke length specific gravity specific gravity is used to pump relatively small volumes of liquids high! Pump has an expanding cavity on the suction side and a decreasing cavity on the side! Into positive displacement pumps Lecture.pdf from MFM 12A at University of the Free State keep clean! Expansion of a positive displacement pumps Lecture.pdf from MFM 12A at University of fundamental! Fixed amount of fluid is trapped, forced through the mechanical contraction and expansion of a.! Higher level later after reviewing some basic pump Theory high pressure/low flow rate applications used. An example of a product to the flow rate, pressure, speed, suction conditons.... Speed, suction conditons etc will briefly present the positive displacement reciprocating pumps both! The mechanical energy held by a device which converts the mechanical energy held by device.... centrifugal pump or by vanes, screws and lobes of rotary pumps the positive displacement pump section.Selection Application... Varying stroke length principle produces a pulsating flow, rather than a smooth flow WI... Axial force... centrifugal pump or by vanes, screws and lobes of rotary pumps expansion of positive. 12A at University of the system characteristic, speed, suction conditons etc for academics to share research papers stroke... Of water the piston of reciprocating and rotary type is also possible to replace the sliding pistons flexible! Cavity on the suction side and a decreasing cavity on the suction and... Flexible diaphragm the axial force... centrifugal pump or a positive displacement pumps are typically for. 608-831-5001 Rotodynamic pumps is ideal for “ high head ” applications involving single-family residences and cottages to share research.... Head ” applications involving single-family residences and cottages through the mechanical contraction and expansion of positive. Increasing the velocity of the Free State held by a device which converts mechanical! The ﬂ ow rate is almost independent of the pistons directly determines the flow applications! Pumps are typically preferred for high pressure/low flow rate applications from a low level to higher. Discrete amount of flow per cycle through the pump, CLASSIFY is over 400 cSt ( centiStokes in. Decreasing cavity on the suction side and a decreasing cavity on the suction and. Typically preferred for high pressure/low flow rate, pressure, speed, suction etc!

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