The HDPV2 Gate was originally developed to isolate silos in applications where high pressure aeration is used to fluidize powder discharge. Over time, the HDPV2 Gate has been redesigned and modified for greater application versatility.
Ideal application: Higher-pressure applications when handling non-abrasive to moderately abrasive powders, pellets or granules.
Externally adjustable blade for in-line maintenance
Patented “rising blade” action to positively seal against high pressures
Replaceable parts for in-line maintenance and prolonged service life
End seal displacement pocket to prevent material packing upon closure
Unobstructed opening for unrestricted material flow and to maintain convey line pressures
Optional air purge assembly keeps fine materials in the flow stream, to prevent them from collecting in the gate's body
No pinch points or exposed moving point for safety
No internal cavities to prevent wedging, lodging & spoilage
Lifting lugs for ease of installation
Gravity flow, dilute phase and dense phase pneumatic conveying applications up to 75 psig | 5barg | +0.5 MPa, depending on gate size. Can be used in pressure or vacuum systems.
Non-abrasive to moderately abrasive powders, pellets and granules. Well-suited for handling sticky and/or corrosive materials, and for wash-down.
4 – 16 in | 100 – 405 mmID & OD diameters are available. Also available in schedule 10, 20 or 40 pipe sizes.
Available in round sizes.
8 – 9 in | 200 – 230 mm
75 – 425 lb | 35 – 195 kg
ANSI #125/150, DIN PN10
Custom flanges are available
250° F | 120° C for standard gate, with modifications that allow up to 400° F | 205° C
Material Contact Options
304 or 316L stainless steel, carbon steel
O-Ring Seal Construction
Double-acting air cylinder
Magnetic reed, proximity or mechanical limit switches
Material Flow Controls
AVP - Learn More >
Sealed body air purge
Special Service Inlet
ATEX Zone 20 (internal), ATEX Zone 21 (external), FDA
304 Stainless Steel Material Contact
316L Stainless Material Contact
PET Replaces Nylon for the blade support guides.
Replace Inlet ANSI pattern Flange with flange pattern to match DIN mounting pattern. (Includes metric inserts) Replace Lower Flange on Outlet Return Pan to include holes laser cut to match DIN mounting pattern.
Modifications are made allowing 400 F (204 C) continuous to 450 F (232 C) intermittent service.
Add welded integral Special Service Inlet to standard Insert Flange and Insert Ring Assembly. (Must be oriented on closing end of valve stroke)
*Additional modifications available based on application
Vortex HDPV2 Gate vs. Alternatives
• Many alternative slide gates and butterfly valves rely on seals which are directly exposed to the material flow stream. These seals rapidly erode or tear away in service. This deficiency promotes leakage of materials and dusts past the gate and to atmosphere, in addition to actuation issues and several other maintenance concerns. The Vortex® HDPV2 Gate™ addresses these issues by incorporating a durable, silicone (durometer 70) O-ring seal, which provides greater wear resistance and longer service life than alternative sealing materials. To hinder materials from migrating into the gate body, the HDPV2 Gate also features a bonnet seal cartridge, which houses a PTFE-treated packing gland. PTFE-treated packing gland also provides greater wear resistance and longer service life than alternative sealing materials. Within the bonnet seal cartridge, the packing gland expands to create a dust-tight seal around the vertical perimeter of the blade. The bonnet seal cartridge shields the packing gland from the material flow stream, to protect it from abrasion. This design maintains the gate's positive seal with infrequent maintenance intervention. Once the packing gland has experienced significant frictional wear, it can be removed and replaced to restore the gate’s dust-tight seal. This maintenance process can be performed while the gate remains in-line.
• A butterfly valve's rotating disc is directly exposed to the material flow steam, which creates wear to the disc itself. The exposed disc also disrupts convey line pressures and obstructs material flow as they pass through the valve, which can cause line plugs and other maintenance concerns. To resolve these issues, when the HDPV2 Gate is open, its sliding blade is recessed to create an unobstructed opening that maintains convey line pressure and allows unrestricted material movement.
• The HDPV2 Gate is specifically designed to mechanically clear materials away from the sealing surfaces with each actuation. The HDPV2 Gate’s packing gland is designed to mechanically self-clean the blade with each opening stroke. This prevents the blade from carrying materials back into the gate body, which could otherwise cause actuation issues and other maintenance concerns. At the closing end of the gate, the HDPV2 Gate can be designed with a partial Special Service Inlet to create a slight void between the leading edge of the blade, the material flow stream, and the O-ring seal. As the leading edge of the blade nears the O-ring seal, a Special Service Inlet ensuresany residual materials remaining at the blade's leading edge have an opportunity to fall away into the process line, prior to the blade contacting the O-ring seal. By protecting the O-ring seal frommaterial contact, it reduces seal wear and maintains the gate's positive seal with infrequent maintenance intervention.
• Many alternative slide gates pack materials into an end seal, preventing positive closure. This promotes material leakage through the valve, can cause blade damage, and can cause other actuation issues. Upon gate closure, the HDPV2 Gate’s sliding blade "rises" upward into a seat,rather than a true end seal, so that materials remaining at the leading edge of the blade can fall away into the process line below, rather than packing into an end seal. The rising blade design also lifts the blade against the O-ring seal for a better seal of materials and dusts in high pressure applications.
• When the gate is closed, if materials and dusts begin to leak past the blade, it indicates the O-ring seal has partially worn and the compression load is lessened, causing the blade to no longer beforced against the O-ring seal as it should be. With this maintenance indication, the HDPV2 Gate's blade is externally adjustable to restore the gate's dust-tight seal. Using simple tools, the nut beneath the lower bonnet cover can be tightened. This “lifts” the blade to restore its compression load against the O-ring seal. This maintenance process can be performed while the gate remains in-line, and can be repeated several times before the O-ring seal must be replaced.