Bi-directional adjustable energy dissipating near zero leakage head loss valve

A bi-directional head loss valve comprising:

• a valve body having a flow path along a flow axis and a transverse valve actuation axis, the body including an actuation shaft housing and a guide shaft mount disposed in opposition along the transverse valve actuation axis;
• a fixed plate within the valve body transverse the flow axis, the fixed plate having a plurality of downstream orifices parallel to the flow axis;
• a mobile plate housed within the valve body upstream of and parallel to the fixed plate, the mobile plate having an upstream side, and a plurality of upstream orifices parallel to the flow axis, the mobile plate being adapted to move along the transverse valve actuation axis:
• from a fully open position, wherein the upstream and downstream orifices are in flow communication within an upstream inner perimeter of the valve body on the upstream side of the mobile plate;
• to a fully closed position, wherein the downstream orifices are blocked by the mobile plate;
• a ring located about the upstream inner perimeter of the valve body, the ring having an inner surface engagingly biased against and parallel to the upstream side of the mobile plate, and having an outer surface engagingly biased against an upstream pipe gasket flange;
• an actuation shaft along the transverse valve actuation axis slidably housed within the actuation shaft housing, the actuation shaft having an inner end engaging the mobile plate and an outer end adapted to engage a valve actuator;
• and
• a guide shaft along the transverse valve actuation axis having an inner end engaging the mobile plate and an outer end engaging the guide shaft mount;
• wherein the valve body further comprises a recessed molded ultra high molecular weight polyurethane that engagingly biases the ring.

A bi-directional head loss valve comprising:

• a valve body having a flow path along a flow axis, and a transverse valve actuation axis, the body including an actuation shaft housing and a guide shaft mount disposed in opposition along the transverse valve actuation axis;
• a fixed plate within the valve body transverse the flow axis, the fixed plate having a plurality of downstream orifices parallel to the flow axis;
• a mobile plate housed within the valve body upstream of and parallel to the fixed plate, the mobile plate having an upstream side, and a plurality of upstream orifices parallel to the flow axis, the mobile plate being adapted to move along the transverse valve actuation axis:
• from a fully open position, wherein the upstream and downstream orifices are in flow communication within an upstream inner perimeter of the valve body on the upstream side of the mobile plate;
• to a fully closed position, wherein the downstream orifices are blocked by the mobile plate;
• a ring located about the upstream inner perimeter of the valve body, the ring having an inner surface engagingly biased against and parallel to the upstream side of the mobile plate, and having an outer surface engagingly biased against an upstream pipe gasket flange;
• an actuation shaft along the transverse valve actuation axis slidably housed within the actuation shaft housing, the actuation shaft having an inner end engaging the mobile plate and an outer end adapted to engage a valve actuator;
• and
• a guide shaft along the transverse valve actuation axis having an inner end engaging the mobile plate and an outer end engaging the guide shaft mount;
• wherein the ring is movably secured to the valve body in a direction parallel to the flow axis and the ring is secured to the valve body by a key way mechanism.