SYSTEM OF VALVES AND MECHANICAL SUPPORT COMPARTMENT EQUIPPED WITH ABOVE SYSTEM OF VALVES Russian patent published in 2011 - IPC E21D23/16 F15B21/02 

FIELD: mining.

SUBSTANCE: system of valves includes two controlled return valves the control line inlet of which is connected to the pressure line inlet of the other controlled return valve. Outlet of the first controlled return valve is connected through the first simple return valve located with possibility of being shutoff to two other in-series located simple return valves; at that, connection point between both other return valves is connected to the outlet of the second controlled return valve. Inlet of the first of other return valves is connected to the outlet of the second one of the other return valves.

EFFECT: improvement of system of valves, reducing the cost of the construction and simplifying the adjustment of system of valves.

9 cl, 2 dwg