In a tandem pump, the housings (also called cylinders) are connected by a center piece through through holes. The center block acts as a central hub or manifold, connecting the individual cylinder blocks together to form a tandem pump assembly. Here are some key points about connecting the shells via the center piece: 1. Center block design: The center block is designed with multiple through holes, aligned with the corresponding cylinder or housing. The number of through holes depends on the specific design and configuration of the pump in this series. Each through hole is connected to the cylinder block, allowing hydraulic fluid to flow between them. 2. Fluid passages: Through holes in the central cylinder create fluid passages between connected cylinders. Hydraulic oil flows from one cylinder to the next through through holes, enabling this series of pumps to act as multi-stage pumps. 3. Alignment and sealing: Precise alignment of the through-holes on the center block and corresponding cylinder is required during assembly to ensure proper fluid flow and sealing. Precise alignment helps maintain fluid passage integrity and prevents fluid leakage or bypass between cylinder blocks. ER-R-147C-TB-26-21-NN-N-C-S1AP-A1R-NNN-ANS-NNN ERR147CTB2621NNNCS1APA1RNNNANNSNNN ER-R-147C-TB-26-20-NN-E-C-S2BP-A1R-NNN-ANS-NNN ERR147CTB2620NNECS2BPA1RNNNANNSNNN ER-R-147C-TA-22-20-NN-N-C-S2CP-A1R-NNN-ANS-NNN ERR147CTA2220NNNCS2CPA1RNNNANNSNNN ER-R-147C-TA-20-20-NN-N-C-S1CP-A1R-AAA-ANS-NNN ERR147CTA2020NNNCS1CPA1RAAAANSNNN ER-R-147C-RP-26-20-NN-N-3-S4CP-A1N-AAA-NNN-NNN ERR147CRP2620NNN3S4CPA1NAAANNNNNN ER-R-147C-RP-26-20-NN-N-3-S2WP-A1N-AAA-NNN-NNN ERR147CRP2620NNN3S2WPA1NAAANNNNNN ER-R-147C-RP-26-20-NN-N-3-S1RP-A1N-AAA-NNN-NNN ERR147CRP2620NNN3S1RPA1NAAANNNNNN ER-R-147C-RP-26-20-NN-N-3-S1NP-A1N-NNN-NNN-NNN ERR147CRP2620NNN3S1NPA1NNNNNNNNNNNN ER-R-147C-RP-26-20-NN-N-3-S1BP-A1N-AAA-NNN-NNN ERR147CRP2620NNN3S1BPA1NAAANNNNNN ER-R-147C-RP-26-20-NN-N-3-K5CP-A1N-NNN-NNN-NNN ERR147CRP2620NNN3K5CPA1NNNNNNNNNNNN ER-R-147C-RP-25-20-NN-N-3-S4NL-A1N-NNN-NNN-NNN ERR147CRP2520NNN3S4NLA1NNNNNNNNNNNN ER-R-147C-RP-25-20-NN-N-3-S2NL-A1N-AAA-NNN-NNN ERR147CRP2520NNN3S2NLA1NAAANNNNNN ER-R-147C-RP-25-20-NN-N-3-K5NL-A1N-NNN-NNN-NNN ERR147CRP2520NNN3K5NLA1NNNNNNNNNNNN ER-R-147C-RP-22-20-NN-N-3-K5BP-A1N-NNN-NNN-NNN ERR147CRP2220NNN3K5BPA1NNNNNNNNNNNN ER-R-147C-RP-21-21-NN-N-3-K5RP-A1N-AAA-NNN-NNN ERR147CRP2121NNN3K5RPA1NAAANNNNNNN ER-R-147C-RP-21-20-NN-N-3-S1NL-A1N-NNN-NNN-NNN ERR147CRP2120NNN3S1NLA1NNNNNNNNNNNN ER-R-147C-RP-21-20-NN-N-3-S1NL-A1N-AAA-NNN-NNN ERR147CRP2120NNN3S1NLA1NAAANNNNNN ER-R-147C-RP-21-20-NN-N-3-S1CP-A1N-NNN-NNN-NNN ERR147CRP2120NNN3S1CPA1NNNNNNNNNNNN ER-R-147C-RP-21-20-NN-N-3-S1CP-A1N-AAA-NNN-NNN ERR147CRP2120NNN3S1CPA1NAAANNNNNN ER-R-147C-RP-21-20-NN-N-3-S1BP-A1N-NNN-NNN-NNN ERR147CRP2120NNN3S1BPA1NNNNNNNNNNNN ER-R-147C-RP-21-20-NN-N-3-S1AP-A1N-AAA-NNN-NNN ERR147CRP2120NNN3S1APA1NAAAANNNNNNN 4. Sealing mechanism: In order to ensure the effective sealing between the central body and the cylinder body, an appropriate sealing mechanism is adopted. This may include O-rings, gaskets or other sealing elements between the mating surfaces of the centerbody and cylinder block. These sealing mechanisms prevent fluid leakage and maintain the required pressure in the tandem pump. 5. Structural Integrity: The connection of the housing through the center block enhances the structural integrity of the series pump assembly. The central cylinder provides stability and support for the individual cylinders, ensuring they remain aligned and properly positioned during operation. This structural integration contributes to the overall reliability and performance of this range of pumps. 6. Repairability and maintenance: Connecting the shell through the center block allows for easy repairability and maintenance. If necessary, individual cylinders can be removed from the central cylinder for inspection, repair or replacement without dismantling the entire series of pump assemblies. 7. Fluid distribution: The through hole on the central cylinder acts as a channel to distribute the hydraulic oil evenly among the connected cylinders. This ensures that each cylinder receives an equal share of fluid flow, resulting in balanced operation and consistent performance of all stages of the pump. 8. Modular Design: Using a central block to connect the cylinders in a series pump provides a modular design approach. Each cylinder block can be manufactured individually and then combined with the center body during assembly. This modularity simplifies production, maintenance and component replacement, as individual cylinder blocks can be easily removed or added as required. 9. Optimal flow path: The optimized flow path in the pump can be realized by connecting the housing through the central block. Central cylinders can be designed to include features such as runners, grooves or contours to promote efficient fluid flow and minimize pressure loss between cylinders. ER-R-147C-RP-21-17-NN-N-3-S4CP-A1N-NNN-NNN-NNN ERR147CRP2117NNN3S4CPA1NNNNNNNNNNNN ER-R-147C-RP-21-17-NN-N-3-S1NP-A1N-NNN-NNN-NNN ERR147CRP2117NNN3S1NPA1NNNNNNNNNNNN ER-R-147C-RP-20-30-NN-N-3-S2CP-A1N-AAA-NNN-NNN ERR147CRP2030NNN3S2CPA1NAAANNNNNN ER-R-147C-RP-20-30-NN-N-3-S1NP-A1N-AAA-NNN-NNN ERR147CRP2030NNN3S1NPA1NAAANNNNNN ER-R-147C-RP-20-30-NN-N-3-S1CP-A1N-NNN-NNN-NNN ERR147CRP2030NNN3S1CPA1NNNNNNNNNNNN ER-R-147C-RP-20-30-NN-N-3-S1CP-A1N-AAA-NNN-NNN ERR147CRP2030NNN3S1CPA1NAAANNNNNN ER-R-147C-RP-20-20-NN-N-3-K5NP-A1N-AAA-NNN-NNN ERR147CRP2020NNN3K5NPA1NAAANNNNNN ER-R-147C-RP-17-10-NN-N-3-S1NP-A1N-AAA-NNN-NNN ERR147CRP1710NNN3S1NPA1NAAANNNNNN ER-R-147C-RP-17-10-NN-N-3-K5CP-A1N-AAA-NNN-NNN ERR147CRP1710NNN3K5CPA1NAAANNNNNN ER-R-147C-RP-16-25-NN-F-3-S2LP-A1R-NNN-ANS-NNN ERR147CRP1625NNF3S2LPA1RNNNANNSNNN ER-R-147C-RP-16-12-NN-N-3-S1NL-A1N-NNN-NNN-NNN ERR147CRP1612NNN3S1NLA1NNNNNNNNNNNN ER-R-147C-RP-10-20-NN-N-3-K5BP-A1N-NNN-NNN-NNN ERR147CRP1020NNN3K5BPA1NNNNNNNNNNNN ER-R-147C-RP-10-20-NN-N-3-K5BP-A1N-AAA-NNN-NNN ERR147CRP1020NNN3K5BPA1NAAANNNNNN ER-R-147C-PC-26-NN-NN-N-3-S4CP-A1N-AAA-NNN-NNN ERR147CPC26NNNNN3S4CPA1NAAANNNNNNN ER-R-147C-PC-26-NN-NN-N-3-S2BP-A1N-AAA-NNN-NNN ERR147CPC26NNNNN3S2BPA1NAAANNNNNNN ER-R-147C-PC-26-NN-NN-N-3-S1VP-A1N-NNN-NNN-NNN ERR147CPC26NNNNN3S1VPA1NNNNNNNNNNNN ER-R-147C-PC-26-NN-NN-N-3-S1RP-A1N-AAA-NNN-NNN ERR147CPC26NNNNN3S1RPA1NAAAANNNNNNN ER-R-147C-PC-26-NN-NN-N-3-S1NP-A1N-NNN-NNN-NNN ERR147CPC26NNNNN3S1NPA1NNNNNNNNNNNN ER-R-147C-PC-26-NN-NN-N-3-S1NP-A1N-AAA-NNN-NNN ERR147CPC26NNNNN3S1NPA1NAAAANNNNNNN ER-R-147C-PC-26-NN-NN-N-3-S1NL-A1N-AAA-NNN-NNN ERR147CPC26NNNNN3S1NLA1NAAAANNNNNNN ER-R-147C-PC-26-NN-NN-N-3-K5NP-A1N-NNN-NNN-NNN ERR147CPC26NNNNN3K5NPA1NNNNNNNNNNNN 10. Ease of assembly: The central cylinder block provides a convenient assembly point for connecting the cylinder blocks. During assembly, the cylinder block aligns with the through holes in the center body, ensuring proper positioning and connection. This simplifies the overall assembly process and helps maintain the accuracy of the fluid flow path. 11. Prevention of leakage: The housings are joined by a center block which, combined with a proper sealing mechanism, helps prevent fluid leakage within the series pumps. The sealing elements used between the center body and the cylinder form a reliable barrier, ensuring that hydraulic oil flows through its intended channels and cannot escape through gaps or joints. 12. Flexibility and scalability: The use of a central block allows for flexibility and scalability in series pump design. Additional cylinders can be added or removed depending on the desired pump configuration and performance requirements. This flexibility allows this range of pumps to be customized and tuned for a variety of applications and operating conditions. 13. Improve efficiency: The overall efficiency of the pump can be improved by connecting the housing through the center block. By ensuring proper alignment and sealing between cylinders, hydraulic losses are minimized and the pump provides consistent performance and efficient fluid transfer in all phases. Connecting the housings via a center block in a tandem pump offers advantages in terms of design flexibility, ease of assembly, fluid distribution, and overall performance. Manufacturers provide specific guidelines and recommendations for the assembly, maintenance and operation of series pumps in order to optimize their functionality and reliability.