In the case of a sudden drop in pressure the build-up pressure in the piston area of pneumatic gripping, swivel, linear and quick-change modules will not get lost, due to the SCHUNK SDV-P pressure maintenance valves. They are often used grippers, which
cannot be equipped with a mechanic gripping force maintenance. With the SDV-P-E, SCHUNK, the competence leader for clamping technology and gripping systems presents for the first time a pressure maintenance valve, where both air channels are equipped with integrated quick ventilation. For setting up the system again using pressure maintenance valves, the modules which are fixed in a defined end position can be manually activated by a ventilation button without having to remove the pressurized pneumatic hoses. The compact SDV-P-E is equipped with standard threaded connectors, and can be combined with pneumatic actuators from many different manufacturers. Already existing SDV-P pressure maintenance valves can be replaced 1:1 with the new SDV-P-E. The modules made of stainless steel, are available in three sizes for flow rates of 200 l/min up to 600 l/ min. They ensure a maximum pressure drop of 0.1 bar per hour (at a defined reference volume and constant temperature),
and cover a pressure range from 2 to 10 bar. The switching time
is about 10 ms.

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