Abstract: A valve for controlling a fluid flow comprises: (a) a valve body having an internal cavity; (b) a valve stem receivable within the internal cavity; the valve stem having a control portion configured and a tail portion; the control portion having a first diameter thereof; (c) a deformable valve seat carried by the control portion in a coaxial conformal manner; and (d) a ring mountable within the internal cavity. The control portion has a circumferentially arranged area adjacent to the tail portion. The circumferentially arranged area is of a second diameter smaller than the first diameter. The ring is mountable between a nut and the valve seat such that the nut when secured to the valve body presses onto the valve seat such that the valve seat is deformed within a space between the circumferentially arranged area defined by the second diameter and fills the space in a sealed manner.

Abstract: A valve for controlling a fluid flow comprises: (a) a valve body having an internal cavity; (b) a valve stem receivable within the internal cavity; the valve stem having a control portion configured and a tail portion; the control portion having a first diameter thereof; (c) a deformable valve seat carried by the control portion in a coaxial conformal manner; and (d) a ring mountable within the internal cavity. The control portion has a circumferentially arranged area adjacent to the tail portion. The circumferentially arranged area is of a second diameter smaller than the first diameter. The ring is mountable between a nut and the valve seat such that the nut when secured to the valve body presses onto the valve seat such that the valve seat is deformed within a space between the circumferentially arranged area defined by the second diameter and fills the space in a sealed manner.

Abstract: A sensing valve comprises: (a) a valve body defining a chamber; (b) a control member configured for controlling a fluid flow through the chamber; (c) inlet and outlet ports; and (d) a sensor arrangement for measuring at least one characteristic of the fluid flow and (e) a microprocessor configured for acquiring and processing data from said sensor arrangements. The microprocessor is preprogrammed for calculating and reporting predetermined characteristics of said incoming and outcoming flows. The sensor arrangement comprises an inlet sensor being in fluid connection with the fluid flow incoming into the inlet port and an inlet sensor arrangement being in fluid connection with the fluid flow incoming into the inlet port.

Abstract: A valve for controlling a fluid flow including (a) a valve body; (b) a valve stem securable within the valve body; the valve stem having a control portion configured for blocking the fluid flow and a tail portion configured to transfer a rotating torque; and (c) a deformable valve seat carried thereon in a coaxial and rotating manner; the valve stem and valve seat having inner and outer surfaces, respectively, conformal to each other. The outer surface of the valve stem has a circumferentially-arranged stepped area; the deformable valve seat when secured within the valve is deformed such that a space between the circumferentially-arranged stepped area of the outer surface and the inner surface of the valve seat is filled by the valve seat.