V15 Series Hydraulic Piston Pump For Injection Molding Machine V15A1R10X V15A4R10X V15HLC4R10X

1. Load Sense vs Pressure Compensation – The Most Important Selection Decision

The V15 series offers two fundamentally different control architectures. Choosing the wrong one affects energy consumption, oil temperature, and cycle stability.

Pressure Compensation (A-Type): V15A1R10X, V15A2R10X, V15A3R10X, V15A4R10X

The pump maintains a preset maximum pressure. When system pressure reaches that setpoint, the pump destrokes to maintain pressure without continuing to deliver full flow. The pressure range is determined by the number after "A" in the model code:

A1 = 8–70 bar (low pressure)

A2 = 20–140 bar (medium pressure)

A3 = 20–210 bar (high pressure)

A4 = 20–250 bar (maximum pressure)

When to choose pressure compensation: Your machine operates at a single pressure setpoint, or you have a hydraulic system where flow demand does not vary significantly between functions. Pressure-compensated pumps are simpler, lower cost, and easier to maintain.

Load Sensing (HL-Type): V15HLC4R10X

A load-sensing pump senses the highest load pressure in the system and adjusts displacement to deliver only the flow required by the active actuator, at a pressure just above what the load demands. When no actuator is moving, the pump stands by at near-zero flow and low pressure.

When to choose load sensing: Your injection molding machine has multiple actuators operating in sequence-clamping, injection, holding, ejection, core pulling. A load-sensing pump eliminates the bypass flow that a pressure-compensated pump would generate during low-demand phases. The result is lower oil temperature rise, reduced energy consumption, and the ability to use a smaller hydraulic reservoir .

Practical impact: In a typical injection molding cycle, the pump spends significant time at low flow demand (holding pressure, cooling). With a pressure-compensated pump, excess flow bypasses through the relief valve, converting directly into heat. With load sensing, the pump reduces displacement, and the heat is never generated in the first place.

2. Low Noise Across the Full Pressure Range

The V15 series is engineered for low noise operation across the entire pressure range, not just at low pressure. The optimized internal structure reduces operating noise and flow pulsation, improving the working environment around the machine . A quieter pump means less operator fatigue and easier compliance with workplace noise regulations-particularly relevant in injection molding shops where multiple machines run simultaneously.

3. Compact, Lightweight Design for Retrofits and New Builds

The V15 series features a small, lightweight design with a cast iron housing. At approximately 12 kg, it is among the lighter pumps in its displacement class . This matters for two scenarios: retrofitting an older machine where the mounting bracket has limited load capacity, and new machine design where overall hydraulic package weight affects machine dynamics and shipping costs.

4. SAE-A Flange and Direct Motor Coupling

The V15 series uses an SAE-A two-hole mounting flange with a φ22.2 mm shaft and 6.3×6.3 mm key. The shaft diameter and flange dimensions are designed for direct coupling to standard electric motors without requiring an adapter plate or bell housing in most configurations . This simplifies both new installations and replacement of aging pumps.

5. Daikin V Series Compatibility – A Drop-In Alternative

The YEOSHE V series is widely recognized as a direct replacement for Daikin V series pumps. The mounting flange, shaft dimensions, and port locations are matched to Daikin's V series platform . If your machine currently uses a Daikin V15 and you need a cost-effective replacement without modifying the hydraulic circuit or mounting bracket, the YEOSHE V15 series is a direct interchange.

6. Wide Model Range – One Platform, Multiple Displacements

The V series covers V8 through V70 within a common mounting architecture. For injection molding machine OEMs and rebuild shops, this means a single pump platform serves multiple machine sizes. A V15 can be replaced with a V18 or V23-provided the system flow and pressure requirements are recalculated-without changing the mounting flange pattern .