DUCKBILL CHECK VALVES - Cla-Val Products and …

1 DUCKBILL CHECK VALVESS eries DBThe DUCKBILL Series valve allows material to flow then prevents it from returning to its Styles to Suit a Wide Variety of ApplicationsFlangedStyleDBFSlip-OverStyl eDBOJ acketStyleDBJI nsertStyleDBIDESCRIPTIONCla-Val Series DB DUCKBILL CHECK VALVES area flexible sleeve design made of quality fab-ric-reinforced elastomer materials for maxi-mum resistance to corrosion and wearcaused by continuous operation with abrasiveslurries, sludge, or effluent. The flexiblesleeve provides maximum flow with a mini-mum pressure drop across the valve at alltimes.

2 The " DUCKBILL " concept CHECK valve hasbeen in use for over 100 years in waterworksand commonly accepted for use in industrialprocess piping systems and in waste andstorm water or sewer piping simple, one-piece " DUCKBILL " sleeve elimi-nates moving components and intrusive bodystructures that create problems with conven-tional CHECK valve designs. There are nomechanical parts that can freeze, corrode,bind, or otherwise inhibit smooth conventional CHECK and flap gatevalves, the Cla-Val DUCKBILL CHECK valve doesnot require regular maintenance to replaceworn seats, hinge pins, balls, or principal of operation is pressure in the valve forces the lipsor " DUCKBILL " apart to permit flow.

3 As pressureor flow increases, the lips open further, allow-ing more flow. This feature allows solids topass unhindered with low pressure there is backpressure or reverse flow,the lips squeeze tightly together, preventingbackflow. Even with some wear, the "duck-bill" CHECK sleeve will still function includingsealing around entrapped & MATERIALS Choice of (4) inlet connection styles allowCla-Val Series DB DUCKBILL CHECK VALVES tobe installed in a wide variety of " DUCKBILL " fabric-reinforced elastomerchoices include:Ethylene Propylene, Viton, Buna-N, Hypalon,Butyl, Neoprene, and Natural Rubber for com-patibility with most ordering above Elastomers add first let-ter of the material after the model number ie.

4 4"-DB-N (N for Neoprene) Sample Flow Rate vs Headloss Graphs. Other valve sizes available upon request Based on flow testing at Utah State Flow Rate vs Headloss Graphs. Other valve sizes available upon request Based on flow testing at Utah State Propylene RubberMost effective for applications involving potable water,waste or diluted Resists solvents, halogenated hydrocarbons, oxygen,weather, ozone, oils and N Resistant to kerosene, moderate chemicals, fats, oils,grease and many Rubber Good abrasion resistance, tensile strength and resilien-cy.

5 Also suitable for applications with organic acids,alcohols, ketones and most moderate Resists strong acids and bases, ozone, weathering,heat and oxidizing Good resistance to animal and vegetable fats, strongand oxidizing chemicals, oils, heat and Generally resistant to oil and grease, moderate chemi-cals, fats, many hydrocarbons and ozone. Resistant tobarnacle engineering specifications or when placing your order, pleaseprovide the following information:MinimumMaximumFlow Rate (gpm)Line PressureBack PressureSPECIFICATIONSE lastomer Selection GuideSeries DBFF langed Style DuckbillCla-Val Series DBF DUCKBILL flanged Style CHECK VALVES feature anintegral, metal-backed, rubber flange for attaching directly to flanged -end connections from tank or head wall.

6 A variety of elastomers allowDBF VALVES to be used with many different fluids. When Model DBF, valve ID size, flange drilling, and add first letter ofelastomer material ie: 4"-DB-N (N for Neoprene)FFWIDHWCFFIDCla-Val Series DBO DUCKBILL Slip-Over Style CHECK VALVES feature asoft sleeve end for slip over connection to pipe end and fastened withstainless steel clamp for low inlet pressure applications. A variety ofelastomers allow DBO VALVES to be used with many different ordering, specify Model DBO, pipe OD size, and add first letterof elastomer material.

7 Ie: 4"-DBO-N (N for Neoprene)Series DBOD uckbill CHECK ValvesSlip-Over StyleModel DBO Dimension Chart (inches)SizeID1/23/411 1/222 1/234568101214161820242830F/F2 1/233 1/44 1/25 3/47 1/2912131517182426 1/2283132414446C11111 1/22333444666688810W11 1/22 1/82 5/83 7/84 5/85 1/27 3/88 3/410 1/213 3/41719 5/824 3/426 1/229 3/431 1 DBF Dimension Chart (inches)SizeID11 1/222 1/234568101214161820242830F/F33 7/85 1/46 1/47 1/29111214161820232532414446H7/87/87/87/ 81 1/81 1/81 1/81 3/81 3/81 3/81 3/81 3/81 3/81 3/81 7/81 7/81 7/81 7/8W2 1/82 5/83 7/84 5/85 1/27 3/88 3/410 1/213 3/41719 5/824 3/426 1/229 3/431 1 :Dimensions are for clearance purposes only.

8 Actual product dimensions may vary based upon specific application sizes are available, contact factory for DBF comes with 316 stainless steel backing ring 5/16" thick (other material available upon request).Note:Dimensions are for clearance purposes only. Actual product dimensions may vary based upon specific application sizes are available, contact factory for DBJJ acket Style DuckbillCla-Val Series DBJ DUCKBILL Jacket Style CHECK VALVES feature anall-metal enclosure for the DUCKBILL valve installed in pipelines as awhisper quiet, non-slamming, low-maintenance, low pressure-dropcheck valve.

9 A variety of elastomers allow DBJ VALVES to be usedwith many different fluids. When ordering, specify Model DBJ,nominal pipe, flange drilling, and add first letter of elastomer mate-rial ie: 4"-DBJ-N (N for Neoprene)HFFIDWFFWIDHCla-Val Series DBI DUCKBILL In-Line flanged Style CHECK VALVES are forpressurized pipeline CHECK applications where it is inserted between twopipe flanges. Cla-Val Series DBI DUCKBILL In-Line flanged Style CheckValves have an integral, metal-backed, rubber flange for attachingdirectly to flanged -end pipe connections.

10 A variety of elastomers allowDBI VALVES to be used with many fluids. When ordering, specify ModelDBI, pipe ID size, flange drilling, and add first letter of elastomer materi-al. ie: 4"-DBI-N (N for Neoprene) Cla-Val Copyright Cla-Val 2008 Printed in USA Specifications subject to change without notice. Box 1325 Newport Beach, CA 92659-0325 Phone: 949-722-4800 Fax: 949-548-5441 E-mail: Website B- DUCKBILL Brochures (R-1/08)Series DBID uckbill CHECK ValvesIn-Line flanged StyleModel DBJ Dimension Chart (inches)SizeID11 1/41 1/222 1/23456810F/F4 1/25 1/26 1/28 1/29 1/211 1/411 3/415 3/4192123H4 1/44 5/857 1/87 1/28 1/810 5/811 1/213 1/21822 3/8W5 3/46 1/46 1/28 1/291011 3/411 3/415 1/417 1/219 3/8Wt.