Form tolerances in Hydraulic Valves

Four types of Form errors must be within a restricted limit in hydraulic valve parts. The circularity, straightness and cylindricity are very critical to quality in spool and spool bore in valve body. The flatness is very important to the faces of valve body sections in a sectional DC valve.

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Honing - Single Pass Vs Multiple Pass

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Function of rotary coupling and engineering expectations

Rotary coupling also called as Rotary joint or center joint is designed for supplying high pressure oil from stationary member to rotating member. The design needs to be sound and reliable and pressure drop has to be minimum while optimizing the flow paths.

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Geometry of Valve spools and spool bores- Effect on performance

Rotary coupling also called as Rotary joint or Center joint is designed for supplying high pressure oil from stationary member to rotating member. Rotary coupling being a hydraulic element and used in earth moving and material handling equipments, its weight has to be as light as possible while being able to withstand the pressure load and frictional torque load which are cyclic in nature.

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Leakage control in Hydraulic valves

The leakage in hydraulic valves depends on clearance between mating parts. In a Directional control valve, clearance between the spool and the bore is very critical for controlling the leakage, hence the ability to hold the load without any drift.

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Monobloc valve OR Sectional Valve

Mono-block Directional control valves are compact with lower weight as compared to a equivalent sectional valve. The price to performance ratio is higher compared to sectional valve. The opportunity for leakage that can happen between sections in a sectional valve does not exist in mono-block. Also, there are less serviceable parts in a mono-block valve.

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Technological leadership is Key to Business Growth

India has been growing at a healthy pace of 10% per annum. Additionally, during certain financial years, over the last two decades, there were instances where growth of over 20% were seen.

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