KCL’s NACHI-Type Piston Pump Series brings variable displacement axial piston technology to industrial hydraulic systems that demand high energy efficiency, precise flow control, and dependable performance under continuous automated operation. Built around an adjustable swashplate mechanism, this series is available across seven frame sizes and seven distinct control types, giving engineers precise control over exactly how the pump responds to system demand.

The Swashplate Advantage

At the core of every pump in this series is an adjustable swashplate mechanism — the engineering principle that allows an axial piston pump to vary its displacement in response to changing system requirements. This design delivers high volumetric performance while keeping operating noise low and dynamic response fast, meaning the pump adjusts quickly and smoothly as downstream demand changes, without the lag or instability that can affect less refined variable displacement designs.

Energy Conservation and Heat Control Built In

An automatic pressure compensation feature regulates output flow based on real-time system demand — the same principle that makes variable displacement technology valuable across KCL’s product range, applied here to axial piston architecture. The practical results are threefold: reduced power consumption because the pump isn’t working harder than the circuit requires, minimized fluid temperature rise because less excess energy is being converted to heat, and extended oil service life as a direct consequence of that lower operating temperature.

Seven Frame Sizes, Seven Control Types

The NACHI-Type Piston Pump Series spans displacement options from 8 cm³/rev up through 100 cm³/rev, with the larger 70 and 100 cm³/rev frames rated to higher maximum operating pressures than the smaller frames — giving you a genuinely scalable platform rather than a single fixed specification.

Just as important as frame size is control type, and this series offers seven distinct options:

Pressure Compensating Type — the standard configuration, automatically adjusting output to maintain a set pressure and reduce energy waste.

Remote Pressure Control Type — allows pressure adjustment from a remote control port, useful for systems requiring centralized control across multiple hydraulic units.

Two Pressure-Two Flow Control Type — enables switching between high and low pressure/flow settings within a single operating cycle, suited to machinery with distinct operating phases.

Solenoid Cut-Off Control Type — provides electronic on/off control over pump output, well suited to automated systems requiring programmable control logic.

Two Pressure Cut-Off Control Type — offers dual-pressure switching via solenoid control, for applications needing more nuanced pressure management than a simple cut-off.

Load Sensing Control Type — automatically matches pump output to actual load demand, maximizing energy efficiency in applications with genuinely variable load conditions.

Two Pressure-Two Flow and Load Sensing combinations — available for the most demanding multi-condition applications requiring both flow switching and load-responsive output.

Double Pump (Tandem) Configurations

For applications requiring higher total flow or multiple independent circuits, KCL offers Double Pump tandem configurations that pair a shaft-end variable piston pump with a cover-end pump within a single integrated housing. These configurations are available across multiple frame size combinations, giving engineers a compact way to achieve dual-circuit hydraulic delivery without the mounting and coupling complexity of two entirely separate pump units.

Purpose-Built Variants

Within this series, select configurations — including our PVS-08 Series — are purpose-built for spray equipment applications, reflecting KCL’s approach of adapting core platform engineering to specific end-use requirements rather than forcing every application into a single generic configuration.

Typical Applications

• Automated industrial hydraulic systems requiring precise, energy-efficient flow control
• Machine tools benefiting from compact integration and steady pressure output
• Applications requiring specific control logic (solenoid cut-off, load sensing, or multi-pressure switching)
• Spray equipment and other specialized OEM applications

Why Choose KCL’s NACHI-Type Piston Pump

Few hydraulic components offer this degree of configuration flexibility from a single core platform. Whether your application needs straightforward pressure compensation or a genuinely complex load-sensing, multi-pressure control scheme, KCL’s engineering team works directly with OEM customers to specify the exact frame size and control type that matches real circuit requirements — manufactured under our ISO 9001:2015 certified quality systems and backed by decades of precision hydraulic manufacturing.

Working through a control-type or frame-size decision for your application? Share your circuit’s pressure, flow, and control requirements with our engineering team.