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ProFlex™ Style 720

The Proco ProFlex™ 720 in-line flanged rubber duckbill check valve is designed to fit directly inside of an existing pipe. This particular valve is supplied with a flat face rubber flange, which allows installation between existing pipe flanges, and eliminates the need for a valve body. Various drilling standards are available upon request.

Some notable features of the Proco ProFlex™ Style 720 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

For more information about the features and benefits of the Proco ProFlex™ Style 720 rubber duckbill check valve, download our brochure.

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

All Proco Series 700 ProFlex™ rubber duckbill 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™ check valve to suit your application.

Proco ProFlex™ rubber duckbill 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™ rubber duckbill check 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 CodeCover 1,2 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 720Standard Drilling for PROCO Style 720MAXIMUM WORKING PRESSURE (PSIG)WEIGHT2 lbs / (kgs)

 Length
Inch / (mm)

Duckbill Height Inch / (mm)Flange O.D. Inch / (mm)Bolt Circle Inch / (mm)No. of HolesSize of Holes Inch / (mm)
2(50)7.25
(184)
1.250
(32)
6.00
(152.40)
4.75
(120.65)
40.750
(19.1)
1253
(1.4)
3(80)9
(229)
2.250
(57)
7.50
(190.50)
6.00
(152.40)
40.750
(19.1)
125 4
(1.8)
4(100)10
(254)
3.875
(98)
9.00
(228.60)
7.50
(190.50)
80.750
(19.1)
1008
(3.6)
5(125)13
(330)
4.875
(124)
10.00
(254.00)
8.50
(215.90)
80.875
(22.2)
7510
(4.5)
6(150)14.5
(368)
5.875
(149)
11.00
(279.40)
9.50
(241.30)
80.875
(22.2)
7512
(5.4)
8(200)15
(381)
6.750
(171)
13.50
(342.90)
11.75
(298.45)
80.875
(22.2)
7513
(5.9)
10(250)21
(533)
 9.875
(250)
16.00
(406.40)
14.25
(361.95)
 121.000
(25.4)
5029
(13.2)
12(300)26
(660)
11.875
(302)
19.00
(482.60)
17.00
(431.80)
12 1.000
(25.4)
5037
(16.8)
14(350)27
(686)
12.000
(305)
21.00
(533.40)
18.75
(476.25)
121.250
(31.8)
5041
(18.6)
16(400)32
(813)
14.000
(356)
23.50
(596.90)
21.25
(539.75)
161.250
(31.8)
50 50
(22.7)
18(450)29
(737)
17.000
(451)
25.00
(635.00)
22.75
(577.85)
161.250
(31.8)
 25 158
(71.7)
20(500)34
(864)
19.000
(502)
27.50
(698.50)
25.00
(635.00)
201.250
(31.8)
 25 234
(106.1)
24(600)44
(1118)
23.000
(603)
32.00
(812.80)
29.50
(749.30)
201.375
(34.9)
25308
(139.7)
28(700)47
(1194)
27.000
(687)
36.50
(927.10)
34.00
(863.60)
281.375
(34.9)
25 362
(164.2)
30(750)49
(1245)
29.000
(737)
38.75
(984.25)
36.00
(914.40)
281.375
(34.9)
25417
(189.1)
32(800)54
(1372)
31.000
(787)
41.75
(1060.45)
38.50
(977.90)
281.625
(41.3)
25 454
(206.0)
36(900)59
(1499)
35.000
(889)
46.00
(1168.40)
42.75
(1085.85)
321.625
(41.3)
25499
(226.3)
42(1050)66
(1676)
41.000
(1041)
53.00
(1346.20)
49.50
(1257.30)
361.625
(41.3)
25729
(330.7)
48(1200)74
(1880)
47.000
(1194)
59.50
(1511.30)
56.00
(1422.40)
441.625
(41.3)
25 754
(342.0)
54(1350)75
(1905)
53.000
(1346)
66.25
(1682.75)
62.75
(1593.85)
442.000
(50.8)
25 813
(368.8)
60(1500)83
(2108)
59.000
(1499)
73.00
(1854.20)
69.25
(1758.95)
522.000
(50.8)
25 964
(437.3)
72(1800)99
(2515)
71.000
(1803)
86.50
(2197.10)
82.50
(2095.50)
602.000
(50.8)
251125
(510.3)

Notes: Higher back pressures can be obtained by using Internal Supports, contact PROCO.
Dimensions are approximate and may change due to pipe dimension changes, inlet, back pressures and flow rates.
1.  Larger sizes available upon request.

2.  Weights are approximate.

Due to the wide array of uses for the Proco ProFlex™ Style 720 rubber duckbill check valves, it is recommended that you download our ProFlex™ Style 720 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.