ETK Number: S-HYD-HSV-HAW-16408   Manufacturer: Hawe Hydraulics   Model: Hawe Directional spool valve type SG and SP         Price: Request a Quote   Comment: Directional spool valves are generally employed in oil-hydraulic systems. They serve to control the oil flow and thus the direction of movement of the consumers (hydraulic cylinders and hydraulic motors). These valves are designed for individual ins   Description: They feature an internal leakage compensation, hence no leakage connection is required. All valve versions are available either for: ' direct pipe connection or ' manifold mounting Every directional spool valves consists of a control element (valve spool incl. housing) and a directly mounted actuation. The valve unit is manufactured entirely of steel, thus rendering the housing insensitive to pressure surges and leakage as can sometimes be observed after prolonged periods of use with cast housings. This is caused usually by hairline cracks which form and migrate externally, especially when the permissible pressure range has been fully utilized. Such phenomena are ruled out right from the start. The housing bores are diamond-honed. The hardened and ground valve spools are polished/deburred. This preserves their roundness and exact geometric shape (the control edges are not worn down or widened) ensuring even sealing gaps with a minimum leakage rate. Cast material (zinc and aluminum die casting) is used solely for non-pressurized components e.g. actuation housing, spring dome, base plates, etc. There is also a version available where the housing of the manual actuation is made of spheroidal cast iron which is intended especially for rough operation conditions or when these valves are connected in series.

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