| 摘要 |
mechanical engineering. SUBSTANCE: invention relates to valves installed in various mains, pipelines and other systems, particularly to shutoff valves and valve closure locking devices. Device for locking valve closure in extreme positions has main and spring-loaded auxiliary locks provided with drives and common socket in valve body. Rod of valve closure is mechanically coupled with lever provided with additional slot for main lock. EFFECT: reduced forces required for opening valve limited in size, provided of automatic closing in emergency. 7 cl, 3 dwg
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