FIELD: mechanical engineering; hydraulic cutters. ^ SUBSTANCE: invention relates to hydropneumatic devices for use as suction and delivery valves in hand pumps of hydraulic cutters where idling travel is required to bring cutter to object and provision of cutting at high pressure of working medium. Hydraulic check valve contains body with sealing edge in hole passing along axis of body and sealing end face with bushing fitted on said end face. Spring-loaded shutoff is arranged in inner space of bushing and is provided with rubber sealing member. The latter is in contact with sealing end face of body at operation under low pressures of working medium. Steel sealing cone is in contact with sealing edge of body hole at operation under high pressures of working medium. ^ EFFECT: provision of optimum sealing of valve at operation under high and low pressures of working medium. ^ 3 dwg
