Patent ID: 8082949

Claim:
A non-return valve comprising: a. a ball; b. a valve body comprising (i) a through-channel which forms a bend or elbow; (ii) an outlet; (iii) an inlet fitted with a ring seat on which the ball is settled in the valve's closed position; (iv) a deflected channel with a diameter greater than the ball diameter into which the ball enters in the open valve position, wherein at the inlet, at the junction of the deflected channel and the through-channel, the body has an extended flow cross section; (v) a blind positioned within the deflected channel having a through opening linked with the outlet of the deflected channel, wherein the blind settles the ball in the valve's fully open position; and c. a blade gate ( 1 ) at the outlet of the valve body, wherein the blade gate has a body ( 2 ) which is cast uniformly with the valve body ( 3 ).