PSVL2-36CG Charge Pump

 PSVL2-36CG Charge Pump  Overview
PSVL2-36CG charge pump is a high-performance fixed external gear pump tailored for NACHI PSVL2-36CG axial piston main pump.

 Core Features & Advantages

• High Interchangeability & Reliable FitDesigned to match the NACHI PSVL2-36CG main pump perfectly, this charge pump uses the original-standard mounting interface and precision spline shaft. It is 100% interchangeable with factory parts, ensuring seamless installation without modifications. The standardized design guarantees stable alignment, reduces assembly errors, and supports quick replacement to minimize equipment downtime and maintenance costs.
• Efficient Cavitation Prevention & Leakage CompensationThe pump delivers consistent oil replenishment to offset internal and external system leakage, maintaining positive inlet pressure for the main pump. This effectively eliminates cavitation risk, protects slippers, valve plates and other precision components from erosion, and extends the overall lifespan of the hydraulic system. It works reliably under fluctuating loads and harsh conditions, ensuring continuous equipment performance.
• Optimized Pressure Regulation & Pilot Control StabilityBuilt with a calibrated relief valve, the charge pump maintains pilot pressure within the required range, providing stable control signals for the main pump regulator, travel motors, and directional valves. Precise pressure regulation prevents overpressure damage, reduces system shock, and ensures smooth and responsive equipment operation even under varying load demands.
• Strong Environmental Adaptability & Long DurabilityConstructed with high-grade materials and precision-machined components, this charge pump resists wear, corrosion, and thermal degradation. It performs reliably in high-temperature, dusty, and vibration-intensive environments typical of construction sites, mines, and road projects. Its robust design reduces failure rates and supports long-term continuous operation in medium-to-heavy duty cycles.
• Energy-Efficient Operation & Low Power ConsumptionThe optimized gear profile and hydraulic circuit design minimize internal friction and flow losses, allowing the pump to deliver required pilot pressure and lubrication with low power draw. This reduces unnecessary energy consumption, improves overall system efficiency, and helps lower operating costs without compromising performance or reliability.
• Application Versatility & Wide CompatibilityEngineered for 30–40 ton excavators and other medium-to-large hydraulic machinery, the pump adapts to various working conditions including construction, mining, and earthmoving. Its standardized design and reliable performance make it a dependable auxiliary solution for a wide range of equipment using the NACHI PSVL2-36CG main pump.

Specifications

Applications

1. Hydraulic drives with high pressure, heavy load, variability, large displacement, long service life, and reliability.

2. Steel metallurgy and forging machinery

3. Ceramic and refractory material presses

4. Shipping and hydroelectric systems

5. Rubber vulcanization and paper production

6. Petroleum equipment

7. Construction and mobile machinery

8. Railway and tunneling machines

Packaging & Delivery

Charge pumps are typically packaged securely to prevent damage during transit. The packaging includes:

Protective Wrapping: To safeguard the pump from environmental damage.

Custom Crates: For larger, heavier pumps, ensuring safe handling.

Documentation: Includes installation, maintenance instructions, and warranty details.

Delivery time depends on the model, customizations, and location but typically ranges from 2 to 6 weeks from the order date.

PSVL2-36CG Charge Pump FAQ 

1.Do I need to install the Charge Pump separately? What should I pay attention to when replacing it?

Integrated with the main pump, the charge pump needs no separate installation. When replacing, align the spline shaft correctly, torque the screws properly, keep the mating surface clean, and use the right seal ring for reliable sealing.

2.What preparations are needed before starting the Charge Pump for the first time?

3.What are the requirements for hydraulic oil when using the PSVL2-36CG Charge Pump?

• Recommended Oil Type: Anti-wear hydraulic oil meeting ISO VG 46 or VG 68, suitable for medium-to-high pressure continuous operation.

• Cleanliness Standard: ISO 4406 class 18/15 or higher, to protect precision gears and bearings from wear.

• Viscosity Range: Maintain operating viscosity between 15–100 cSt; avoid extreme thinness or thickness under high/low temperatures.

• Temperature Range: Operate within -20°C to +80°C; avoid prolonged use above 80°C to prevent oil degradation.

• Compatibility: Must be compatible with rubber seals and internal pump materials to prevent swelling or degradation.

• Usage Notes: Use fresh, uncontaminated oil; do not mix different brands or grades.

4. Can the rotation direction of the  Charge Pump be reversed? What are the consequences of reverse rotation?

It cannot run in reverse rotation. Reverse operation will cause insufficient oil supply and pressure loss, trigger severe cavitation, wear internal gears and bearings sharply. It also damages sealing parts, leads to system malfunction and shortens pump service life greatly.

5. Is the Charge Pump a dedicated accessory? Can it work normally without it?

It is a dedicated exclusive accessory matching the main pump. The equipment cannot run normally without it. It supplies pilot pressure, lubrication and oil replenishment, lacking it will cause pump damage and system failure.

6.Can the displacement of the  PSVL2-36CG Charge Pump be replaced arbitrarily?

The displacement cannot be replaced randomly. It must strictly match the original parameter. Improper displacement will lead to abnormal pressure, poor lubrication and system faults, and easily damage pump components。

Certifications & Quality Assurance

PSVL2-36CG Charge pumps are manufactured in compliance with international standards, ensuring high performance and reliability:

ISO 9001: Certified for quality management systems.

CE Certification: Ensures compliance with European safety, health, and environmental protection standards.

RoHS Compliance: Ensures the pump does not contain hazardous materials.

Factory Testing: Every pump is rigorously tested for performance, pressure, and leak integrity before shipping.

FAQ

1.How does the variable displacement work?

The pump's flow is adjusted by changing the angle of an internal swash plate. As the swash plate angle changes, the stroke length of the pistons varies, which in turn changes the volume of fluid displaced per rotation, allowing the flow rate to adapt to the system's needs.

2.What's our advantages?

Factory established in 2005;

With a great deal of production experience;

80+ employees become the professional team;

Constant updated ERP system ensure efficiency of work;

Sophisticated equipment ehanced the accuracy of products;

Professional salesmen provide the greast service;

With a large number of famous customers all over the world;

Great after-sales service;

With the long term cooperation with famous logistics and express company in China,provide the better goods service.

3.What is your payment terms?

Small order/sample order,full payment in advance; Big orders send the first payment 30% before the production,and the balance before shippment.We'll show the photos of the products and packages before delivery.

4.Can you make my own brand on the products?

Of course we can. Just send me your logo  we can make it for you.

5.What is our main export market?

America(40.5%):USA, Canada, Argentina, Brazil

Europe(30.8%):Italy,Germany,England,Holland,Spain,Swiss,Finland,Russia,Poland.

Asia(23.5%):Korea,singapore,India,Turkey,Vietnam,Saudi Arabia,Syria, Israel,Lebanon.

Others(5.8%).

All hydraulic pumps produced by Green Hydraulic have undergone compliance testing, ensuring their quality and reliability.

To meet the diverse needs of different industries, the green hydraulic offer customization options, such as specialized seals, materials, and pump configurations. These facilities often work closely with engineering teams to develop tailored solutions for specific applications, from high-pressure systems to low-flow, high-efficiency pumps.

Each pump undergoes a rigorous quality control process, where pressure tests and performance assessments are conducted to ensure that the pumps meet the required standards for flow rate, pressure capacity, and durability.