Reliable Backflow Control for Water & Wastewater Systems
Proco ProFlex™ Style 730 is an all-rubber rubber duckbill valve developed to prevent reverse flow while allowing forward flow with low head loss. Unlike conventional mechanical check valves, the flexible valve operates entirely through inlet and back pressure, providing an effective duckbill check valve solution without hinges, springs, or moving mechanical components.
The Style 730 slips directly over an existing pipe and is secured with heavy-duty stainless-steel clamps. It can be installed horizontally or vertically, making this rubber check valve adaptable to new installations, replacements, and retrofit projects. Its flexible construction also allows quick interchange with many conventional flap-type check valves.
When forward pressure is applied, the duckbill valve opens to permit discharge; when flow stops or reverse pressure occurs, the flexible bill closes to prevent backflow. This operating principle enables the valve to function as a passive backflow prevention valve while also eliminating valve slam and associated water hammer.
Explore Style 730 rubber duckbill check valves for backflow prevention and water, wastewater, sewerage and stormwater applications. Dutco supplies the ProFlex™ Style 730 rubber duckbill valve for infrastructure projects requiring dependable flow control with negligible maintenance and energy requirements.
All-Rubber Construction for Passive Backflow Protection
- Automatic Flow Response – Opens under forward inlet pressure and closes when reverse pressure develops, allowing operation without external power or mechanical actuation.
- Zero Backflow Performance – Provides an effective backflow preventer valve for pipes and tanks where reverse flow must be controlled.
- No Water Hammer – Flexible closure avoids the sudden mechanical slam associated with conventional check-valve designs.
- Abrasion Resistance – All-rubber construction is suited to abrasive slurries and challenging discharge media.
- No Mechanical Moving Parts – Simplifies the operating mechanism and contributes to negligible maintenance requirements.
- Low Head Loss – Flexible opening characteristics support efficient discharge through the water treatment check valve.
Flexible Installation Across Different Pipe Systems
- Slip-On Installation – The valve fits over an existing pipe and is secured using heavy-duty stainless-steel clamps.
- Vertical or Horizontal Installation – Can be positioned according to the orientation of the discharge pipeline.
- Wide Size Range – Standard product information lists sizes from 1 to 96 inches, with larger sizes available on request.
- Concrete Pipe Compatibility – Special internal diameters are available for applications involving concrete pipes.
- Flap-Valve Replacement – Allows quick interchange with many existing flap-style check valves.
- Infrastructure Versatility – Suitable as a sewerage check valve and stormwater check valve across municipal and civil drainage networks.
Types
The Style 730 is available in several elastomer constructions. Selection can therefore be matched to the conveyed medium, operating temperature, potable-water requirements, and application conditions. All versions are reinforced with polyester tire cord.
Chlorobutyl – BB
This version uses chlorobutyl for both the cover and tube and has the highest listed maximum operating temperature within the standard material table.
- Cover elastomer: Chlorobutyl
- Tube elastomer: Chlorobutyl
- Maximum operating temperature: 121°C
- Suitable where the media and temperature conditions call for chlorobutyl compatibility
EPDM – EE
The EE configuration uses EPDM for both the external cover and internal tube.
- Cover elastomer: EPDM
- Tube elastomer: EPDM
- Maximum operating temperature: 121°C
- Provides an alternative elastomer option for compatible water and process media
Neoprene / CSM – NH
The NH configuration combines a neoprene outer cover with a CSM tube.
- Cover elastomer: Neoprene
- Tube elastomer: CSM
- Maximum operating temperature: 100°C
- Available for project conditions requiring this mixed-elastomer configuration
Neoprene – NN & NN-NSF61
These configurations use neoprene for both the cover and tube. The NN-NSF61 version is specifically listed as UL Classified for water quality and supports potable-water applications.
- Cover elastomer: Neoprene
- Tube elastomer: Neoprene
- Maximum operating temperature: 107°C
- NN-NSF61 configuration available for potable-water installations
Nitrile – PP
The PP configuration uses nitrile for both the cover and tube.
- Cover elastomer: Nitrile
- Tube elastomer: Nitrile
- Maximum operating temperature: 100°C
- Suitable where nitrile compatibility is required for the conveyed media
Neoprene / Natural Rubber – NR
This version combines a neoprene outer cover with a natural-rubber tube.
- Cover elastomer: Neoprene
- Tube elastomer: Natural rubber
- Maximum operating temperature: 82°C
- Provides another material option for application-specific service conditions
Standout Features & Benefits
Effective Backflow Protection
- Flexible bill closes automatically when reverse pressure develops.
- Helps protect connected pipes and tanks against unwanted reverse flow.
- Provides a passive backflow prevention valve without external actuation.
- Functions as a dependable backflow preventer valve across discharge and outfall systems.
Quiet Operation Without Valve Slam
- Flexible closure produces ultra-quiet operation.
- Eliminates the mechanical slamming associated with many conventional check valves.
- Helps reduce water-hammer concerns in pumping and discharge installations.
Low Maintenance Requirements
- All-rubber construction eliminates conventional hinges and mechanical closure components.
- Negligible maintenance and energy costs are identified by Proco as principal advantages.
- The flexible construction will not permanently warp or deform under normal specified operating conditions.
Resistance to Challenging Flow Conditions
- All-rubber construction resists abrasive slurries.
- Common elastomers include neoprene, EPDM, nitrile, natural rubber, and other application-specific compounds.
- Makes the Style 730 suitable among water and wastewater valves where solids, abrasive media, or variable discharge conditions may be encountered.
Potable-Water Options
- Proco offers ANSI/NSF 61-certified Style 730 configurations in neoprene.
- Suitable configurations can therefore be used in clean and potable-water systems.
- Provides a water treatment check valve option where certified elastomer construction is required.
Application Areas
Wastewater Treatment Facilities
- Prevents reverse flow into discharge pipelines and process systems.
- All-rubber construction handles abrasive wastewater conditions without conventional mechanical components.
- Suitable for projects specifying durable water and wastewater valves with low maintenance requirements.
Sewerage Infrastructure
- Helps prevent sewage or discharge water from flowing back into connected pipelines.
- Suitable for outfalls and sewer networks exposed to fluctuating downstream levels.
- Provides a flexible sewerage check valve solution without hinged closure mechanisms.
Stormwater & Drainage Systems
- Prevents receiving water from backing up into stormwater discharge pipelines.
- Particularly relevant to flood-control and outfall applications.
- Functions as a passive stormwater check valve where automatic backflow protection is required.
Potable Water & Storage Tanks
- NSF 61-certified neoprene configurations are available for potable-water contact.
- Helps prevent reverse flow into tanks and clean-water pipework.
- Provides a flexible rubber check valve for suitable potable-water applications.
Pumping & Outfall Systems
- Reduces valve slam and associated water hammer when pumping stops.
- Suitable for discharge pipes, effluent diffusers, mining outfalls, and related systems.
- The slip-on arrangement simplifies installation of the duckbill check valve on compatible pipe ends.
Flood Control & Critical Infrastructure
- Suitable for flood-control measures, airport runways, parking areas, and residential or commercial developments.
- Prevents downstream floodwater from entering connected drainage systems.
- Can be incorporated into new installations as well as system upgrades and retrofits.
UAE Water & Drainage Infrastructure
- Available in a broad size range for municipal, utility, and civil-infrastructure projects.
- Different elastomer options allow selection according to fluid and operating conditions.
- Dutco supports project requirements as a rubber duckbill check valve supplier UAE for water, wastewater, sewerage, stormwater, and outfall systems.
- Projects seeking a rubber duckbill check valve supplier UAE can specify the required size, elastomer, pipe dimensions, inlet pressure, back pressure, and flow conditions for appropriate valve selection.
