Linde HPV-02 Variable pumps for closed circuit operation

Description

Representation of the hydraulic components of a closed loop hydrostatic drive: Variable electro-hydraulic controlled pump HPV-02 E1 and fixed displacement motor HMF-02 plus filter, cooler, and oil tank. The function diagram and the circuit diagram show two types of cooling. Linde high-pressure units are designed for excellent reliability and long service life. The actual service life of a hydraulic unit is determined by numerous factors. It can be extended significantly through proper maintenance of the hydraulic system and by using high-quality hydraulic fluid.

In order to guarantee long-term proper function and high efficiency of the hydraulic pumps, the purity of the pressure fluid must comply with the following criteria according to Linde Works Standard WN 51 210. High-purity oil can extend the service time of the hydraulic system significantly. Units of the HPV-02 series can be equipped with a pure charge pressure manifold or with a combined charge pressure and filter flange manifold. The following filter sizes are available, depending on the rated size of the unit. For further details about the mounting of the charge, pressure manifold see the section “Dimensions. Modular System”

Features

Design Characteristics

• axial piston pump in swashplate design for high-pressure closed loop systems
• clockwise or counterclockwise rotation
• exact and rugged servo control devices (mechanical, hydraulic, electro-hydraulic)
• integrated high-pressure relief valves with make-up function
• integrated low-pressure relief valves for boost, control, and cooler circuits
• replaceable cartridge filter
• SAE high-pressure ports
• SAE mounting flange with ANSI or SAE spline shaft
• through shaft SAE A, B, B-B and C
• charge pressure pumps for internal and external suction, integrated cold start relief valve optional
• optional tandem and multiple pumps

Product Advantages

• compact design
• high power density
• dynamic response
• high reliability
• long service life
• noise-optimized
• precise and load-independent

Technical Data

Operational parameters. Lifetime recommendations

Linde high-pressure units are designed for excellent reliability and long service life. The actual service life of a hydraulic unit is determined by numerous factors. It can be extended significantly through proper maintenance of the hydraulic system and by using high-quality hydraulic fluid.

Beneficial conditions for long service life

• Speed lower continuous maximum speed
• Operating pressure less than 300 bar ∆p on average
• Max. pressure only at reduced displacement
• Viscosity 15 … 30 cSt
• Power continuous power or lower
• Purity of fluid 18/16/13 in ac. with ISO 4406 or better

Adverse factors affecting the service life

• Speed between continuous maximum speed and intermittent maximum speed
• Operating pressure of more than 300 bar ∆p on average
• Viscosity less than 10 CST
• Power continuous operation close to max. power
• Purity of fluid lower than 18/16/13 in acc. with ISO 4406

Operational parameters. Filtration
In order to guarantee long-term proper function and high efficiency of the hydraulic pumps, the purity of the pressure fluid must comply with the following criteria according to Linde Works Standard WN 51 210. High-purity oil can extend the service time of the hydraulic system significantly.

• For reliable proper function and long service life: 18/16/13 in accordance with ISO 4406 or better
• Minimum requirements:  20/18/15 in accordance with ISO 4406
• Commissioning: The minimum purity required for hydraulic oil is based on the most sensitive system component. For commissioning, we recommend filtration in order to achieve the required purity.
• Filling and operation of hydraulic systems: The required purity of the hydraulic oil must be ensured during filling or topping up. When drums, canisters or large-capacity tanks are used the oil generally has to be filtered. We recommend the implementation of suitable measures (e.g. filters) to ensure that the required minimum purity of the oil is also achieved during operation.
• International standard:
  18/16/13/20/18/15 (code number according to ISO 4406 ) corresponds to 8A/7B/7C/ 9A/8B/8C (purity class according to SAE AS 4059)

Filters
Units of the HPV-02 series can be equipped with a pure charge pressure manifold or with a combined charge pressure and filter flange manifold. The following filter sizes are available, depending on the rated size of the unit. For further details about the mounting of the charge pressure manifold see the section “Dimensions. Modular System”

Download Datasheet: Linde HPV-02 Variable pumps for closed circuit operation

Reference: linde-hydraulics.com

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