measurit tideflex outfall check valves 1001

8/9/2019 MeasurIT Tideflex Outfall Check Valves 1001

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Outfall Check Valves


m e a s u r I T t e c h n o l o g i e s




Brief History

• In 1984, the US EPA commissioned us to develop an alternative to metal flap gate

valves, stating that “increasing the reliability and performance of tide gates has a

beneficial impact on the general pollution abatement program for the nation’s

waterways.”

• The elastomer “duckbill” Tideflex® Check Valve was specifically designed to

eliminate operational and maintenance problems associated with flap gates,

including corrosion of mechanical parts, freezing open or shut, warping and

clogging due to trapped debris.

• The EPA rigorously tested the Tideflex ® valve for two years and found that the

Tideflex ® valve showed significant improvement over flap gate valves in terms

of leakage inflow, entrapment of debris, capability to self clean and

susceptibility to marine fouling. “Results of the project indicate that the rubber

tide gate can provide low maintenance and reliable performance as a cost

effective alternative to conventional tide gates.” (Abstract “Development and Evaluation of a Rubber ‘Duck Bill’ Tide Gate”, US EPA,1986)

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The problem with

Metal Flapgate Valves• Hinge pins can rust and

corrode, requiring routinemaintenance, lubrication

and replacement.• The weight of the flapper

requires a high crackingpressure to open, allowingstanding water to remain.

• Standing water reducespipeline storage capacity andcan lead to stagnation, odorand mosquito nesting.

• Debris trapped in the bottom of the valve will prevent the entire flapperfrom closing.

• Installation options are limited






The Tideflex The Tideflex ® ®

Solution Solution!





Principle of Operation

Differential pressure opens the valve…

…Backpressure seals the valve






Flow Testing

Tideflex Technologies hasdone extensive flow testing

at this one-of-a-kind facility ata major university’s waterresearch lab.

Large volumes of water can

be brought through thechannel to test valves of allsizes under free dischargeconditions…






Flow Testing

…and submerged dischargeconditions. The lab also hasfacilities for testing inline check

valves within closed pipingsystems.

This extensive testing, along withresearch and continualdevelopment, combined withover 20 years experience andfield data, means that you can beconfident in the performance of a

Tideflex®

Check Valve.






Original Series TF-2

Straight Bill, Equal FlareTop and Bottom






TF-2 Installations

Worldwide

Thousands of TF-2’s have been successfully installed around the world.






Original Series TF-2

Bottom of Pipe

Required Clearance

The original TF-2

revolutionized the check

valve market, but didhave some installation

limitations.






Improved Series TF-1

Flat Bottom

Tideflex® commitment to continual improvement led

to the TF-1 style.






Improved Series TF-1

Flat Bottom

Bottom of Pipe

Required Clearance






TF-1 “Spine” provides

greater strength






Originally designed for

Sewer Installations

No need to excavate the manhole floor.






Flat Bottom Aids Drainage

Valve can be installed as low as possible for maximum drainage.






Ideal for Low-Lying Areas

For new construction or adding to an existing outfall structure.






Curved Bill Improvement

The Curved Billis another designimprovement

that is standard onmost Tideflex® check valvestyles and sizes.






Curved Bill Improvement

The Curved Bill retains the same dimensions as a straight bill

when extended, but offers greater sealing when closed.

Closed Position

Open Position






Curved Bill design

increases sealing area.

Increased elastomer“memory” when little or no

backpressure is present.

Does not increase cracking

pressure or headloss.

Variable Orifice Opening,

opens only as much as

water pressure demands.

Curved Bill






Curved Bill

Curved bill proved such an improvement,

it is now standard

on all outfall check valves.






Curved Bill

Cracking pressureof the Tideflex®

is 1-2 inches of water.

The valve is self-draining,eliminating standing water andensuring maximum pipelinestorage capacity.






Series 35-1 Flanged

• The TF-1 is also available withan ANSI (or other ) flangeconnection.

• Used for Flanged Pipeor a Direct Wall Mount.

• Recommended for PumpDischarge Applications.

• Ideal for installations where

strong cross-currents arepresent.






Series 35-1

Flanged-end pipe can be fitted with a flanged Tideflex®






Series 35-1

Flanges can also be used for direct mounting to headwalls.






Series 37

• Installs between flanges

•

Eliminates need for avalve body

• Face-to-face is flange thickness

• Eliminates chatter

• Silent and non-slamming






Series 37

The Series 37 can be securely installed in a manhole…






Series 37

…or can be installed into a downstream pipe entering a manhole.






• Fits inside pipe O.D.

• Fastened with internal

stainless steel clamp

• Elastomer construction

• Custom-built to

specification

• Can be installed from within

the manhole

• Ideal where space is

restricted

Series 37G






Series 37G

No flange needs to be accommodated

within the manhole.






Installation Options




Where an exposed length of pipe is

available at the discharge end of a

pipe, the cuff of the Tideflex

®

valve isbuilt to match the outside diameter

of the pipe, and the valve is easily

slipped into place.

Band clamps are used

to secure the valve.

Slip On






Slip On

Installation is straightforward, requiring no special tools or skills.






Slip On

Tideflex® Check Valves can be mounted to corrugated pipe.






Grouted Pipe Stub

A pipe stub slightly smaller that the

inside diameter of the discharge line

can be grouted into the end of the

pipe. The Tideflex® valve is then

slipped onto the stub,

eliminating the need to

drill into the headwallor seawall.






Grouted Pipe Stub

Here, a PVC stub was secured to the outfall vault box.






Thimble Plate

When the pipe terminates

flush with a headwall, athimble plate is secured over

the opening, and the

Tideflex® valve is slipped

onto the pipe thimble. Thistype of mounting can also

be used to cover square

culverts and oversized

openings.






Thimble Plate

First, the thimble plates

are secured to the

headwall…

…then the valves can be easily

slipped into place.






Integral Rubber Flange

An integral rubber flange allows direct

connection to flanged-end pipe or

headwalls and seawalls. Flanges can be

ANSI, DIN, or special drill patterns,

including square and

rectangular. Backup rings

are provided, but gaskets

are not required.






Direct Wall Mount

A flanged connection is desirable in pump-discharge installations.






The insert is securedto the headwall or seawall

by a standard flange.

Thimble Insert



I T t h l i




Thimble Insert

Typical Thimble Insert Installation



I T t h l i




Slip Inside Pipe

Excellent for odor control, residential protection and flood control.






Applications





Stormwater Discharge

Tideflex® Check Valves

are the first choice of coastal

and inland municipalities for

stormwater systems.

Tideflex® valves

discharge with just a

1-2 inches differential

pressure which allows the

pipe to self-drain, thereby

increasing storage capacity.







Tideflex® check valvesprotect dischargelines from rising

waters that can floodand surcharge atreatment plant.

Effluent Discharge







Odor Control

Offending odors from sewer systems can be preventedfrom escaping with lightweight Tideflex® check valves,

while still allowing water to discharge when needed.



Ai Hi h R ff





Airport / Highway Runoff

Tideflex® valves are used extensively for

large surface water areas that require backflow prevention,

such as airport runways, highways and parking lots.



R id i l Tid fl ®





Residential Tideflex ®

Tideflex® check valves

are frequentlyspecified for

commercial and

residential areas

where dependable

backflow preventionis necessary. The

Tideflex® valve is

maintenance free,

passive and silent.



Sit D i





Site Drainage

Residential areas, office

parks and commercial

shopping centers use


to allow the free flow

of stormwater and to

prevent backflow and

flooding from canals,streams and rivers.



Fl E li ti B i





Flow Equalization Basins


are used to prevent

backflow from one stage

of pretreatment to the

next.

The operation of the

valve is not affected by

debris such as plastic

bags, twigs,

branches or leaves.


g

Groundwater Relief





In-ground storage basins

use Tideflex® valves to

relieve pressure from

groundwater.

The valves allow

groundwater

to enter the basin

while preventing

stored fluid

from escaping.

Groundwater Relief


g

Coastal Discharge





Coastal Discharge

Rocky and sandy areas cause

problems for

flapgates because buildup

can prevent the valve from

closing fully, or pile up in

front of the valve, preventing

it from opening…


g

Sandy Beaches





Sandy Beaches

…Tideflex® Check Valves

will continue to operate

even when partiallyburied because water will

eventually exit the top of

the bill, and erode away

the built-up debris.


Levees





Levees

Low-lying areas protected

by levees depend on Tideflex®

valves to prevent high water

levels from back flowing from

the river, while still allowing

stormwater to freely drain.

The low cracking pressure of

the Tideflex® allows easy

draining even when little

difference in elevation exists.


Pumping Stations





Pumping Stations

Large stormwater

pumping stations use

Tideflex® Check Valves

to ensure that tail water

does not backflow into

stormwater catchments.

The rubber construction of

the Tideflex® Check Valve is

resistant to saltwater.


Marinas





Marinas

The all-rubber

construction of the

Tideflex® Check Valve is

ideal for marinas wherefuel and oil spills can

destroy metal valves.

The flexibility of the

Tideflex® helps to

minimize damage

to a boat hull should it

be struck accidentally.


CSO/SSO Systems





CSO/SSO Systems

Combined Sewer

Overflows or Sanitary

Sewer Overflows rely

heavily on the Tideflex®

Check Valve to prevent

unwanted intrusion

into the treatment plant

from discharge points.


Effluent Outfalls





Effluent Outfalls

Outfalls from treatment

plants are not always

conveniently located for

routine inspection and

maintenance, so Tideflex®

Check Valves are relied

upon for their

ruggedness andreliability.


Floatables Control





Floatables Control

Upstream, a trash rack or

screen is used to collect

floatables.

Downstream, a Tideflex®

is used to preventre-entraining

the floatables.


Visit www measurIT com





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Visit www.measur IT .com

to learn more aboutproducts and engineered systems!

Measur IT Technologies Ltd.

Craan, Craanford,

Gorey, Co. Wexford

Ireland

Phone: +353 (0)53 942 8962

Fax: +353 (0)53 942 8963

info@measur IT .com

www.measur IT .com

We will be happy to answer your questions!

measurit tideflex outfall check valves 1001

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