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ProFlex™ Style 770/780

The Proco ProFlex™ Style 770 and 780 wafer style rubber check valves feature many design benefits, including:

  • 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

For more information about the features and benefits of the Proco ProFlex™ Styles 770 and 780, download our brochure.

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

All Proco Series 700 ProFlex™ rubber check valves are available in a wide selection of back pressure capabilities and elastomers, including NSF/ANSI 61 certified material. Because of the wide array of available configurations, there’s sure to be a Series 700 ProFlex™ valve to suit your application.

Proco ProFlex™ check valves won’t freeze or deform, and they function solely on the inlet and back pressure which are present in each unique situation.

Each valve is designed by some of the most experienced rubber technicians in the industry, and are carefully constructed using the finest engineered materials available. All of our Series 700 ProFlex™ valves are precisely manufactured to ensure proper operation, and will provide years of unhindered, trouble-free service.

Available Styles & Materials

For Specific Elastomer Recommendations, See: PROCO "Chemical To Elastomer Guide"
PROCO Material CodeCover1,2 ElastomerTube ElastomerMaximum Operating Temp. °F (°C)Branding Label ColorF.S.A. Material Class
BB Chlorobutyl Chlorobutyl 250 °F (121°C) Black STD. III
EE EPDM EPDM 250 °F (121°C) Red STD. III
NH Neoprene CSM 212 °F (100°C) Green STD. II
NN Neoprene Neoprene 225 °F (107°C) Blue STD. II
PP Nitrile Nitrile³ 225 °F (107°C) Yellow STD. II
NR Neoprene Natural Rubber 180 °F (82°C) White STD. I

Notes:

ProFlexTM is a trademark of PROCO Products, Inc.
All products are reinforced with polyester tire cord.
1.  Check Valve “cover” can be CSM coated on special order.
2.  Styles with Neoprene covers meet all requirements of U.S.C.G.
3.  NSF/ANSI Standard 61 certified materials available upon request.

NOMINAL 1 PIPE SIZE
Inch / (mm)

Standard Dimensions for PROCO Style 770

Back Pressure
PSIG / (bar)

VELOCITY (ft/s) vs. HEADLOSS (ft)2

Plate Thickness
Inch / (mm)

Plate O.D.
Inch / (mm)

1246810
4(100)

0.250
(6.35)

6.19
(157.23)

150
(10.0)

0.401.293.976.188.179.83
6(150)

0.250
(6.35)

8.50
(215.90)

150
(10.0)

0.441.484.316.548.5010.16
8(200)

0.375
(9.53)

10.63
(270.00)

150
(10.0)

0.481.674.646.918.8410.48
10(250)

0.375
(9.53)

12.75
(323.85)

150
(10.0)

0.521.864.987.279.1710.81
12(300)

0.500
(12.70)

15.00
(381.00)

150
(10.0)

0.562.055.327.639.5111.14
14(350)

0.500
(12.70)

16.25
(412.75)

150
(10.0)

1.182.775.828.029.7911.37
16(400)

0.750
(19.05)

18.00
(457.20)

150
(10.0)

1.803.506.338.4110.0811.60
18(450)

0.750
(19.05)

19.88
(504.95)

150
(10.0)

2.424.236.848.7910.3711.83
20(500)

0.750
(19.05)

22.00
(558.80)

150
(10.0)

2.824.697.179.0510.5611.98
24(600)

1.000
(25.40)

27.25
(692.15)

150
(10.0)

2.864.757.249.1210.6412.06
30(750)

1.000
(25.40)

34.50
(876.30)

150
(10.0)

2.934.847.359.2110.7512.17
36(900)

1.000
(25.40)

41.00
(1041.40)

150
(10.0)

2.994.937.469.3110.8612.28

Notes:
1.  Larger sizes available upon request

2.  Velocity vs Headloss data is approximate and based on varying flow rates

NOMINAL 1 PIPE SIZE
Inch / (mm)

Standard Dimensions for PROCO Style 780

Back Pressure
PSIG / (bar)

VELOCITY (ft/s) vs. HEADLOSS (ft)2

Plate Thickness
Inch / (mm)

Flange O.D.
Inch /(mm)

Bolt Circle
Inch / (mm)

No. of Holes

Size of Holes
Inch / (mm)

1246810
4(100)

0.250
(6.35)

9.00
(228.60)

7.50
(190.50)

8

0.750
(19.1)

150
(10.0)

0.401.293.976.188.179.83
6(150)

0.250
(6.35)

11.00
(279.40)

9.50
(241.30)

8

0.875
(22.2)

150
(10.0)

0.441.484.316.548.5010.16
8(200)

0.375
(9.53)

13.50
(342.90)

11.75
(298.45)

8

0.875
(22.2)

150
(10.0)

0.481.674.646.918.8410.48
10(250)

0.375
(9.53)

16.00
(406.40)

14.25
(361.95)

12

1.000
(25.4)

150
(10.0)

0.521.864.987.279.1710.81
12(300)

0.500
(12.70)

19.00
(482.60)

17.00
(431.80)

12

1.000
(25.4)

150
(10.0)

0.562.055.327.639.5111.14
14(350)

0.500
(12.70)

21.00
(533.40)

18.75
(476.25)

12

1.250
(31.8)

150
(10.0)

1.182.775.828.029.7911.37
16(400)

0.750
(19.05)

23.50
(596.90)

21.25
(539.75)

16

1.250
(31.8)

150
(10.0)

1.803.506.338.4110.0811.60
18(450)

0.750
(19.05)

25.00
(635.00)

22.75
(577.85)

16

1.250
(31.8)

150
(10.0)

2.424.236.848.7910.3711.83
20(500)

0.750
(19.05)

27.50
(698.50)

25.00
(635.00)

20

1.250
(31.8)

150
(10.0)

2.824.697.179.0510.3711.98
24(600)

1.000
(25.40)

32.00
(812.80)

29.50
(749.30)

20

1.375
(34.9)

150
(10.0)

2.864.757.249.1210.5612.06
30(750)

1.000
(25.40)

38.75
(984.25)

36.00
(914.40)

28

1.375
(34.9)

150
(10.0)

2.934.847.359.2110.7512.17
36(900)

1.000
(25.40)

46.00
(1168.40)

42.75
(1085.85)

32

1.625
(41.3)

150
(10.0)

2.994.937.469.3110.8612.28

NOTES:
1. Larger sizes available upon request.
2. Velocity vs. Headloss data is approximate and based on varying flow rates.

Due to the wide array of uses for the Proco ProFlex™ Styles 770 and 780 rubber check valves, it is recommended that you download our Style 770/780 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.