A11VLO260DRS/11R-NZD12N00 A11VLO Series Large Displacement Open Circuit Axial Piston Pump

Hengmeisi, a trusted global supplier and professional factory focusing on quality A11VLO260DRS/11R-NZD12N00 A11VLO Series Large Displacement Open Circuit Axial Piston Pump, independently develops and produces the A11VLO260DRS/11R-NZD12N00 to solve the core pain points of insufficient flow, easy power mismatch and rapid heat aging of traditional concrete pump main pumps under long-term continuous operation. The A11VLO260DRS/11R-NZD12N00 belongs to the latest 11R generation upgraded open-circuit swashplate piston pump, completely different from bent-axis A6/A7/A8 series pumps and small-displacement industrial A10VSO pumps. It is professionally customized for the working characteristics of concrete pump trucks that require 24-hour uninterrupted high-pressure feeding, focusing on large-flow continuous output, intelligent load adaptive power regulation and extreme working condition durability.

The A11VLO260DRS/11R-NZD12N00 has an ultra-large nominal displacement of 260mL/r, which is one of the mainstream high-power specifications for concrete machinery main hydraulic pumps. The rated working pressure reaches 350bar, and the instantaneous peak pressure can reach 400bar, fully meeting the high-pressure impact and large-flow feeding demands of concrete pumping operation. Equipped with advanced DRS composite hydraulic control system, the pump integrates DR constant pressure stabilization and RS constant power limit functions, which can intelligently switch control modes according to real-time load changes. It maintains stable system pressure during normal pumping, and automatically limits power absorption and avoids engine overload when encountering concrete blockage and sudden heavy load, perfectly matching the power output logic of large diesel engines.

In terms of structural upgrading and operational stability, the A11VLO260DRS/11R-NZD12N00 adopts the latest 11R generation optimized heavy-duty structure, which comprehensively upgrades internal bearing rigidity, flow channel smoothness and friction pair tolerance compared with the old 10R version. The enlarged and optimized oil suction channel effectively suppresses cavitation and air suction phenomena during high-speed and large-flow operation, improving the overall volumetric efficiency to 94%. The customized NZD12N00 full-range sealing and protection system solves the common problems of oil leakage and dust intrusion of traditional pumps in outdoor construction environments. The whole machine supports long-term continuous non-stop operation, with low heat generation and stable performance, adapting to high-intensity and high-frequency working modes of concrete construction sites. All installation dimensions, spline specifications and oil port positions are strictly in accordance with original industrial standards, realizing plug-and-play seamless replacement without modifying the original equipment hydraulic system.

Core Product Advantages

1. DRS Dual Composite Constant Pressure & Constant Power Control

The biggest technical advantage of the A11VLO260DRS/11R-NZD12N00 is the advanced DRS dual-function composite hydraulic control system, which is more intelligent and practical than single control pumps. The constant pressure module ensures that the hydraulic system maintains stable pumping pressure during normal concrete delivery, avoiding pulsating pumping and unstable material output. The constant power module can automatically identify sudden load increases such as concrete congestion and pipeline resistance increase, actively adjust pump displacement to limit power absorption, prevent engine stalling and hydraulic system overload damage. The pure mechanical hydraulic control mode has no electronic vulnerable parts, strong anti-interference ability, sensitive response and stable action, and can work reliably in harsh outdoor construction environments with high dust and variable temperature.

2. 260cc Ultra-large Displacement & High Feeding Efficiency

With a super-large displacement of 260mL/r, the A11VLO260DRS/11R-NZD12N00 provides sufficient large-flow hydraulic power support for concrete pump trucks. Compared with 190cc and 130cc medium-displacement pumps, it significantly improves the concrete pumping speed and single-hour construction output, greatly enhancing the overall construction efficiency. The optimized symmetrical multi-piston structure ensures uniform oil suction and discharge, effectively reducing flow pulsation and pumping vibration, making the concrete feeding process more stable and smooth, avoiding pipeline vibration and material segregation problems. The high power density design balances large-flow output and structural compactness, ensuring strong power performance while not occupying excessive installation space of the equipment.

3. 11R New-generation Heavy-duty Reinforced Structure

The 11R upgraded structural configuration is a key optimization of the A11VLO260DRS/11R-NZD12N00 for long-term heavy-load operation. The internal heavy-duty roller bearing group is upgraded with load-bearing tolerance, which can withstand long-term high-frequency pressure impact and mechanical vibration of concrete machinery. The thickened cast steel pump body shell improves structural rigidity and anti-deformation ability, avoiding shell cracking and oil leakage caused by long-term vibration. The precision-matched swashplate and piston friction pair adopt upgraded anti-wear and anti-scuffing technology, which greatly reduces wear loss during high-intensity continuous operation and extends the service life of core components. The optimized internal flow channel reduces fluid resistance and system heat generation, effectively solving the overheating and power attenuation problems of traditional pumps after long working hours.

4. NZD12N00 All-weather Sealing & Anti-fouling Protection

Equipped with professional NZD12N00 customized sealing and dustproof system exclusive for construction machinery, the A11VLO260DRS/11R-NZD12N00 adopts multi-layer composite high-pressure resistant sealing materials, which have excellent high-temperature resistance, low-temperature toughness and dust-proof and waterproof capabilities. It stably adapts to the extreme working temperature range of -40℃ to +125℃, coping with seasonal temperature changes and all-weather outdoor construction. The multi-stage anti-leakage shaft seal and end face seal design completely eliminate internal and external oil leakage risks under long-term high-pressure operation. The integrated dust-proof structure prevents concrete dust, sand and mud from entering the pump body, avoiding component jamming and wear failure, ensuring low failure rate and high stability of the equipment in long-cycle construction operations.

Model Code Detailed Explanation

Each segment of the A11VLO260DRS/11R-NZD12N00 model accurately defines the product structure, displacement, control mode, structural version and customized configuration, facilitating quick model selection and accurate matching for global construction machinery buyers:

Product Structure & Manufacturing Technology

1. Optimized Swashplate Variable Transmission Structure

The A11VLO260DRS/11R-NZD12N00 adopts a heavy-duty swashplate inclined piston transmission structure exclusive for large-flow pumping equipment. The precisely designed swashplate angle adjustment mechanism realizes stepless displacement change, matching the variable flow demand of concrete pumping. The multi-piston symmetrical layout ensures balanced internal force, effectively reducing mechanical vibration and flow pulsation during high-load operation. All core matching parts such as pistons and cylinder blocks are processed by five-axis linkage CNC precision grinding, with micron-level assembly gaps, minimizing internal leakage and ensuring stable large-flow continuous output. The overall structural rigidity is fully strengthened to adapt to high-frequency impact working conditions of engineering machinery.

2. High-strength Anti-fatigue Wear-resistant Material System

Core load-bearing and moving components of the A11VLO260DRS/11R-NZD12N00 are forged from high-purity alloy structural steel, undergoing vacuum carburizing quenching and multiple precision heat treatment processes to achieve ultra-high surface hardness and structural toughness. The friction pair surface is treated with special anti-wear coating to resist long-term high-speed friction and hydraulic impact wear. The thickened integral cast steel shell has strong impact resistance and structural stability, not easy to deform in violent vibration environments. The upgraded heavy-duty bearing group has excellent fatigue resistance, with a design service life far exceeding ordinary hydraulic pumps, fully meeting the 24-hour uninterrupted operation needs of concrete construction equipment.

3. Efficient Heat Dissipation & Intelligent Power Matching System

The A11VLO260DRS/11R-NZD12N00 is equipped with an optimized circulating heat dissipation structure and DRS intelligent power matching system. The large-caliber oil suction and discharge channel improves oil circulation efficiency, quickly takes away internal heat, and avoids performance attenuation caused by long-term high-temperature accumulation. The built-in composite valve group can sense system pressure and load changes in real time, automatically switch constant pressure and constant power modes, realize dynamic balance between equipment pumping efficiency and power energy consumption, protect the engine and hydraulic system from overload damage, and greatly improve the comprehensive stability and economy of equipment operation.

Application Scope

Relying on its ultra-large displacement high-efficiency pumping, DRS intelligent composite control, heavy-duty impact resistance and all-weather environmental adaptability, the A11VLO260DRS/11R-NZD12N00 A11VLO series hydraulic pump is the core main power component for large concrete construction machinery. It is widely applicable to various types of concrete pump trucks, stationary concrete delivery pumps, mortar pumping equipment and large bridge and tunnel construction hydraulic pumping systems. In addition, it can also be used as the main hydraulic pump for large tonnage mobile cranes, heavy-duty road construction machinery and mining hydraulic equipment, providing stable, high-power and long-cycle continuous hydraulic power support for various heavy-load and high-intensity engineering construction scenarios.

As a professional China manufacturer and supplier focusing on high-end A11VLO series heavy-duty hydraulic pumps, Hengmeisi implements strict full-process quality control standards. Every A11VLO260DRS/11R-NZD12N00 pump undergoes strict large-flow calibration, high-pressure impact test and 500-hour long-term aging test before delivery, ensuring stable pumping performance and high interchangeability with original parts. With reliable factory quality, cost-effective price and comprehensive after-sales service, our products have won wide recognition from global engineering machinery enterprises, becoming the preferred replacement and supporting hydraulic component for concrete machinery maintenance and equipment manufacturing.