Durable Quality: Come with 2 spool and #8 BSPP O-ring in/out ports, with cast iron construction for long-time use. Double Acting: Hydraulic control valve for operating double acting cylinders. Spring Return: All spools standard come with spring return, which can return to the neutral position. High-Efficiency: The relief valve range is up to 3600 PSI and the maximum flow is up to 11 GPM. .
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