FIELD: gas industry.
SUBSTANCE: invention relates to pneumatic systems, in particular, to devices for generating high pressure of air or gas in a main pipe, and can be used for metrological purposes for supply of means of controlling and measuring pressure. Pump includes housing 1, working chamber 2 formed by piston 3 of smaller diameter and cylinder 4. Working chamber 5 is formed by piston 6 of larger diameter and cylinder 7. Chambers 2 and 5 are separated by valve unit 8 with intake valve 9 and discharge valve 10, respectively connected with gas supply system and gas pressure consumption system. Pistons 3 and 6 are arranged on opposite ends of rod 11. In valve unit 8 there is longitudinal axial hole 12 for movement of rod 11. In neck of axial hole 12 there is sealing elastic ring 13, sealing chamber 2 and chamber 5 relative to each other. At end of rod 11 on side of piston 3 there is bypass channel 14.
EFFECT: simplified design while providing high output pressure, higher reliability and reduced cost.
3 cl, 5 dwg
