Category: Accessories

Cautions on Piping and Assembling

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Cautions on Piping and Assembling

A hydraulic unit may incorporate steel pipes, stainless pipes, or hoses. Nominal size of pipes: A (millimeter) and B (inch), outer diameter is same. Scale A (millimeter) is usually applied to pipes for flareless fittings. Schedule: it refers to wall thickness and is denoted as Sch. See Tables 12.2 and 12.3 for pipe selections in […]

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Manifold

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Manifolds connect ports of hydraulic components with drilled metal blocks, instead of piping. They usually have outlet ports with tapered threads (Rc) or connection flanges. Manifolds have the following advantages. i . They can reduce leakage and vibrations with simple piping. ii . They are compact. iii. Their assembly does not require trained skills; installation […]

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Selection of Reservoir Capacity

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Selection of Reservoir Capacity

(1) Selection Based on Pump Output Capacity Generally, reservoir capacity should be three to five times larger than the pump output capacity. In a closed circuit, the reservoir capacity can be about 50 percent of the pump output capacity. (2) Selection Based on Oil Level Variation The amount of oil in a reservoir fluctuates with […]

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Requirements for Hydraulic Reservoirs

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(1) A reservoir should be set up with a method to shut out foreign substances such as dust. Example: Filter at a ventilation or a filling port. (2) A reservoir should be set up so that its components can be easily detached for smooth maintenance. (3) A reservoir should have an oil level gauge for […]

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Fittings

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Screw, flange, welded, flare, and flareless fittings are available for line connection and equipment setup. In addition, the following fittings are among the available selection. (1) Socket: Connects lines into straight configurations. Fittings that connect lines with different bores are called reducer. (2) Elbow: Changes directions of lines. Elbow fittings for lines with different bores […]

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Rubber (plastic) Hoses

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Rubber (plastic) Hoses

Rubber hoses are used when metal-tube connection is not allowed, some moving parts are present, and vibration protection is required. The hose consists of an inner layer, a reinforcement layer, and an outer layer, and couplings are connected to each end. In selecting rubber hose, due consideration should be given to working pressure, working fluid, […]

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Shaft Couplings (Couplings)

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Shaft Couplings (Couplings)

These couplings connect a pump shaft and a prime mover. With due consideration to axial misalignment of shafts in hydraulic equipment, the following couplings are available. (1) Flange-type flexible-shaft coupling: with two flanges, this coupling uses the properties of rubber bush applied as a coupling bolt. Deformation of the rubber eliminates the axial misalignment. (2) […]

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