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ProFlex™ Style 731

The Proco Style 731 ProFlex™ check valves are engineered for installation on pre-existing pipe lines such as manholes, outfalls and vaults where the outfall invert of the pipe is close to the floor of the manhole or outfall. When a new installation is being designed, the 731 valves can be engineered into the pipe layout with little concern for outfall clearance due to its “low slope” design.

The new Style 731 check valves allow the valves to be installed without any costly and labor-intensive changes to the existing structure. The 731 is engineered to crack open at 1-2” of head pressure and with its unique engineered sloping bottom, the valve ensures zero potential for standing water. With its all elastomer design, the valve can be installed without concern for the future seizing or rusting which can cause premature failure and maintenance issues.

 

How Does it Work?

The advantage to the Style 731 is the sloping bottom which has been developed to offset the issues commonly affiliated with other flat bottom valves which often entrap solids and flows due to its design. The 731 has been carefully designed to prevent this issue and has a minimal slope which allows complete drainage yet still allows easy installs on minimal clearance areas.

The Style 731 has been engineered to allow a full port which is important in dealing with headloss and jet velocities. The valve is manufactured with 100% algae and barnacle resistant rubber and is also 100% fire resistant.

Advantages:

  • Unique bottom slope design ensures 100% drainage
  • Installs in flat outfall designs
  • Available in both flanged and slip-on design
  • An excellent choice for manholes and outfall installation
  • Ensures sealing from rubbish and small solids

 

Materials of Construction

Neoprene, ANSI/NSF-61 certified product elastomers, EPDM and other elastomers available. Please contact Proco.

Mounting Clamps

304 or 316 Stainless Steel

For more information about the features and benefits of the Proco ProFlex™ Style 731, download this PDF information sheet

 
**The ProFlex™ Slope-Bottom Style  731 Check Valves are covered by US PATENT NUMBER 11,221,081**

ProFlex™ 731 Informational Animation

All Proco Series 700 ProFlex™ Rubber Check Valves 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 inlet and back pressures which will be present in each unique application.

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

**The ProFlex™ Slope-Bottom Style 731 Check Valves are covered by US PATENT NUMBER 11,221,081**

Available Styles & Materials

For Specific Elastomer Recommendations, See: PROCO "Chemical To Elastomer Guide"
PROCO Material Code Cover1,2 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.
Style 731
Diameter Standard Valve Dimensions Approx. Weight
Cuff Width Length Duckbill Height Eccentric Slope
in. mm in. mm in. mm in. mm in. mm lbs kgs
4 100 3.0 76 12.8 326 8.7 222 1.0 25 15 6.8
6 150 4.0 102 16.3 414 14.9 378 2.0 50 23 10.4
8 200 4.0 102 19.1 485 17.9 454 2.0 50 36 16.3
10 250 4.0 102 22.7 577 20.4 518 2.0 50 52 23.6
12 300 6.0 152 27.8 707 23.9 608 2.0 50 59 26.8
14 350 6.0 152 29.2 742 26.7 678 2.0 50 76 34.5
16 400 6.0 152 31.8 807 31.0 788 2.0 50 90 40.8
18 450 6.0 152 33.9 862 33.0 838 2.0 50 130 59.0
20 500 8.0 203 36.9 938 37.7 958 2.0 50 200 90.7
24 600 8.0 203 44.2 1123 43.1 1096 2.0 50 215 97.5
30 750 10.0 254 48.1 1223 52.7 1339 3.0 76 460 208.7
32 800 10.0 254 52.0 1322 53.2 1352 3.0 76 502 227.6
36 900 10.0 254 53.3 1354 54.5 1384 3.0 76 585 265.4
40 1000 10.0 254 59.2 1504 66.5 1690 3.0 76 912 413.5
42 1050 12.0 305 62.4 1584 69.5 1766 3.0 76 1075 487.6
48 1200 12.0 305 63.2 1605 71.6 1818 3.0 76 1350 612.3
54 1350 12.0 305 73.6 1870 89.8 2280 3.9 100 1630 739.4
60 1500 12.0 305 77.6 1970 94.9 2410 3.9 100 1715 777.9
64 1600 12.0 305 78.5 1995 101.6 2580 3.9 100 1777 805.9
66 1650 12.0 305 79.7 2025 103.9 2640 3.9 100 1808 819.9
72 1800 12.0 305 84.8 2155 115.9 2945 3.9 100 1900 861.8
78 1950 14.0 356 91.2 2316 124.0 3150 3.9 100 1993 903.8
84 2100 16.0 406 99.8 2536 125.6 3190 3.9 100 2085 945.7
96 2400 16.0 406 106.9 2716 137.4 3490 3.9 100 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.

**The ProFlexTM Slope-Bottom Style 711 & 731 Check Valves are covered by US PATENT NUMBER 11,221,081**

Due to the wide array of uses for the Proco ProFlex™ Style 731 rubber check valves, it is recommended that you download our Series 700 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.