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Cone Valve

A single Dense Flow Cone Valve is capable of preforming the work of three butterfly valves, and the robust design of the cone valve means it can outlast other valves 10-1.  In dense phase pneumatic conveying applications a pressure vessel must be properly vented allowing material to charge or fill the vessel, and then sealed to begin material conveying.  Many Dense Phase manufacturers will use 3 or 4 valves to vent and seal the pressure vessels on their dense phase pneumatic conveying systems.  In a JDB Dense Phase Pneumatic system, the Dense Flow Cone Valve when combined with our proprietary Charging Hopper is the only moving part throughout the entire conveying system.   Because a single Dense Flow Cone Valve is able to perform the same functions as three or more valves, spare parts inventory is reduced, preventative maintenance requirements, and overall system downtime is decreased.

Dense Phase Cone Valve

JDB Cone Valve Features

Cone materials of construction include Cast Ductile Iron (standard), UHMW, Teflon Coated, and Polished Stainless Steel.  All Cone Valves feature a machined sealing area, and the unique design of the cone valve assembly actually creates a stronger seal as the pressure within the conveying system increases (As pressure within the conveying system increases the force on cone valve against the sealing gasket  increases creating a stronger seal).  The Cone Valve Assembly includes a ¼ turn pneumatically operated actuator that is mounted on the Dense Flow Charging Hopper.  The pneumatic actuator rotates a shaft, arm, and linkage connected to the Dense Flow Cone Valve.  The Actuator rotates clockwise to drop the cone valve allowing material to charge (fill) the pressure vessel, and then rotates counterclockwise to pull the Cone Valve vertically until it seals against a gasket.

 

How the Cone Valve Works

Material enters the Dense Flow Charging Hopper through an offset flanged inlet.  A baffle inside the charging hopper directs the flow of material through one side of the charging hoppers discharge allowing material to charge or fill the Dense Flow Pressure Vessel.  As the material charges the pressure vessel, the air within is being displaced and must be vented for proper filling.  The baffle in the charging hopper that is directing the flow of material through one side of the charging hoppers discharge creates a void space on the opposite side.  This void space creates an area where the displaced air can freely vent from the pressure vessel.  Because the void air space and vent connection are above where the pressure vessel seals, only a single valve is necessary (The Dense Flow Cone Valve).  Also, because the charging hopper inlet is offset, and a void air space is created from the internal baffle, head pressure on the single cone valve is virtually eliminated allowing it to close and seal properly.  Head pressure is the force and weight of the material within a silo or bin.  Most competitors will use two valves stacked on top of each other to achieve the same results in eliminating head pressure.  Their top valve will impede the material flow and reduce head pressure allowing the bottom valve to properly seal their pressure vessel.  Once the pressure vessel is full of material an air actuator pulls the cone valve up against a gasket creating an air tight seal allowing a material convey cycle to begin.

Cone Valve vs. Butterfly Valve

Material and Air Flow Diagram
Cone Valve vs Butterfly Valve Diagram Dense Phase Pressure Vessel Air Flow Diagram
Click on Diagrams to view larger

Contact our engineering department at eng@jdbdenseflow.com, 727-785-8500 x203 to speak with an engineer about the Dense Flow Cone Valve.

 

J.D.B Dense Flow, Inc. ©2014 all rights reserved

P.O Box 38, Palm Harbor, FL 34682 | P: 800-822-3569