THREE-WAY NORMALLY CLOSED VALVE Russian patent published in 2016 - IPC F16K1/36 F16K11/04 F16K39/02 

FIELD: construction.

SUBSTANCE: invention relates to valve industry, in particular to a three-way normally closed valve, equipped with a balancing device. Three-way normally closed valve comprises gate element 3, which is pressed on the side of inlet P to main valve seat 2 of housing 1 in the direction of valve closing and which is opened by means of stock 5 containing an outlet channel 6. Back pressure chamber 8 behind gate element 3 is interconnected with a channel on the side of outlet A through outlet hole 9, in order to balance pressure of fluid medium acting on the front surface and rear surface of the gate element. Gate element 3 comprises main housing 31 of the gate element, support element 32, fastening element 33 and pressing frame 34. Support element 32 is made up of a disk-shaped sealing element with flexible rubber, and comprises main support surface 32a, outlet support surface 32b and connection holes 32c, which are opened in the section between the main support surface and the outlet support surface, in order to form outlet hole 9. Fastening element 33 attaches the support element to the main housing of the gate element. Pressing frame 34 is located on the periphery of the support element. Parts of gate element 3 are formed by moulding.

EFFECT: invention provides simplified manufacturing and assembling of a three-way valve with a gate element made of moulded articles.

5 cl, 8 dwg