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ProFlex™ Style 730

The Proco ProFlex™ Style 730 rubber duckbill check valves are designed to easily slip over an existing pipe and be attached with heavy-duty stainless steel clamps. It can be installed in both vertical and horizontal applications.

Some notable features of the Proco  ProFlex™ Style 730 rubber duckbill check valve include:

  • All-rubber construction to resist abrasive slurries
  • NSF 61 standard construction
  • Ultra-quiet operation, with no water hammer
  • Unique design to prevent backflow
  • Negligible maintenance and energy costs
  • Will not warp or freeze
  • Quick interchange with any flap type check valve
  • Available in sizes from 1” to 96”
  • Available with special ID to suit concrete pipe

The rubber duckbill valve creates a low head loss complete with a zero-back flow. The ability of the duckbill valve to prevent backflow into the mating pipe system is a quality aspect in “checking” pipes or tanks that often have problems with back flow problems or odor control. 

Proco Products manufactures and supplies rubber duckbill valves to withstand almost any type of media. The most commonly supplied is a barnacle and algae resistant neoprene. Other common elastomers are EPDM, nitrile, natural rubber, and elastomers to meet ANSI/NSF-61 and ANSI/NSF-372 specifications. This includes use for clean water and potable applications and eliminates the concerns commonly affiliated with contaminants or leaching of elastomers in potable water systems.

These duckbill valves offer quiet operation with no water hammer or backflow whilst the all rubber construction resists abrasive slurries. This check valve design has the benefit of negligible maintenance and energy costs. Even in winter conditions if the valve is installed in a running water application, the valve will continue to operate satisfactorily due to the elastomers’ unique chemical makeup. In exceptional low temperatures, the duckbill valve will freeze with the medium without any damage and will return to operation upon thaw. Typically, the elastomers used in Proflex duckbill valves are known to supply 35-50 years of service life.

For more information about the features and benefits of the Proco ProFlex™ Style 730 rubber duckbill check valve, download our brochure.

For up-to-date pricing and availability information, contact Proco today.

All of the Proco Series 700 ProFlex™ Rubber Check Valves, including the ProFlex™ Style 730 duckbill check valve, are available in a various selection of elastomers including ANSI/NSF-61 certified product under UL Certification #MH47689. The Proco Series 700 ProFlex™ Rubber Check Valves will not freeze or deform and function solely on the inlet and back pressures which will be present in each unique application.

Each valve is carefully constructed using the finest of engineered materials by some of the most experienced rubber technicians in the industry. All check valves are engineered in precise detail to ensure proper operation and will provide years of unhindered operation and trouble free service.

Available Styles & Materials

For Specific Elastomer Recommendations, See: PROCO "Chemical To Elastomer Guide"
PROCO Material Code Cover 1,2 Elastomer Tube Elastomer Maximum Operating Temp. °F (°C)
BB Chlorobutyl Chlorobutyl 250 °F (121°C)
EE EPDM EPDM 250 °F (121°C)
NH Neoprene CSM 212 °F (100°C)
NN Neoprene Neoprene 225 °F (107°C)
NN-NSF61 Neoprene Neoprene 225 °F (107°C)
PP Nitrile Nitrile 212 °F (100°C)
NR Neoprene Natural Rubber 180 °F (82°C)

Notes:

ProFlexTM is a trademark of PROCO Products, Inc.
All products are reinforced with polyester tire cord.
1. Styles with Neoprene covers meet all requirements of U.S.C.G
2.  NN-NSF/61 UL Classified Water Quality
3.  Other Materials available. Please contact Proco Products, Inc.
Duckbill Valve Style 730
Diameter Standard Valve Dimensions Approx. Weight
Cuff Width Length Duckbill Height
in. mm in. mm in. mm in. mm lbs kgs
1 25 1.0 25 4.1 105 2.4 62 1 0.3
1.5 40 1.0 25 5.0 128 3.2 82 1 0.4
2 50 1.5 38 6.1 156 3.8 97 3 1.2
2.5 65 2.0 51 7.4 189 4.8 122 3 1.4
3 80 3.0 76 9.5 242 5.6 142 5 2.3
4 100 3.0 76 12.3 313 6.9 174 7 3.2
5 125 3.0 76 13.3 339 9.0 228 10 4.5
6 150 4.0 102 15.7 398 10.6 268 13 5.8
8 200 4.0 102 17.8 452 13.7 348 23 10.2
10 250 4.0 102 20.7 527 16.9 428 33 15.0
12 300 6.0 152 26.3 667 20.6 522 59 26.8
14 350 6.0 152 28.8 732 23.7 601 82 37.2
16 400 6.0 152 30.2 767 27.3 693 97 43.8
18 450 6.0 152 33.1 842 30.6 778 209 95.0
20 500 8.0 203 36.4 925 32.6 828 229 104.0
24 600 8.0 203 44.7 1136 38.0 964 215 97.5
28 700 8.0 203 47.2 1198 45.3 1151 365 165.6
30 750 10.0 254 51.5 1309 49.4 1254 460 208.7
32 800 10.0 254 52.5 1334 51.0 1295 495 224.5
36 900 10.0 254 62.0 1574 59.5 1512 585 265.4
40 1000 10.0 254 62.0 1574 65.8 1671 825 374.2
42 1050 12.0 305 65.7 1670 67.9 1725 1075 487.6
48 1200 12.0 305 73.1 1856 76.2 1935 1350 612.3
54 1350 12.0 305 77.8 1976 84.3 2140 1630 739.4
60 1500 12.0 305 83.7 2125 85.4 2170 1715 777.9
64 1600 12.0 305 86.7 2201 89.8 2280 1777 805.9
66 1650 12.0 305 89.8 2281 92.9 2360 1808 819.9
72 1800 12.0 305 97.2 2468 112.9 2868 1900 861.8
78 1950 14.0 356 99.8 2536 113.5827 2885 1993 903.8
84 2100 14.0 356 102.0 2592 117.7165 2990 2085 945.7
96 2400 16.0 406 111.1 2822 127.5591 3240 2270 1029.7

NOTES: Higher back pressures can be provided by using internal vacuum supports and/or engineered Hi-Tensile reinforcement. Contact Proco.
1.  Dimensions are approximate and may change due to pipe dimensions changes, inlet, back pressures and flow rates.
2.  Larger sizes available upon request.
3.  Weights are approximate.

Due to the wide array of uses for the Proco ProFlex™ Style 730 rubber duckbill check valves, it is recommended that you download our Style 730 brochure to review the Frequently Asked Questions. This will ensure that you choose the proper style of check valve for your specific application.

If additional information is needed, please contact us directly.