1 Safety1.2.2.3. Safety risks related to pneumatic/hydraulic systems3HAC030005-001 Revision: -18© Copyright 2006 ABB. All rights reserved.1.2.2.3. Safety risks related to pneumatic/hydraulic systemsGeneralSpecial safety regulations apply to pneumatic and hydraulic systems.Residual energy• Residual energy may be present in these systems. After shutdown, particular care mustbe taken.• The pressure in pneumatic and hydraulic systems must be released before starting torepair them.Safe design• Gravity may cause any parts or objects held by these systems to drop.• Dump valves should be used in case of emergency.• Shot bolts should be used to prevent tools etc. from falling due to gravity.
