Tideflex 37 Series User manual

The revolutionary design of the Series 37 In–Line
Check Valve provides absolute backfl ow protec-
tion. This unique “duck bill” design eliminates
costly backfl ow from oceans, rivers or storm
water and is the ideal valve for effl uent diffuser
systems.
The Series 37 Check Valve is available in a wide
variety of elastomers and is designed to meet your
exact fl ow specifi cations.
Series 37 valves are constructed with 125# ANSI
fl anges, which have the same drilling pattern as
ANSI 150# for ease of installation.
• Simple design
• Cost effective
• No cavities or dead spots
to bind valve operation
• Low maintenance
SERIES 37 INLINE CHECK VALVE
Installation, Operation, and Maintenance Manual
IMPORTANT
Please take a moment to
review this manual.
Before performing any maintenance on the valve
be sure the pipeline has been depressurized. The improper installation or use of this product
may result in personal injury, product failure, or reduced product life. Tidefl ex
®
Technologies can
accept NO liability resulting from the improper use or installation of this product. If you have
any questions or problems, please call the customer service department at [phone]. We
appreciate your comments. Thank you for choosing Tidefl ex
®
Technologies.
Division of Red Valve,Inc.

INSTALLATION
3. INSTALLING FLANGE BOLTS:
Tighten all bolts uniformly to distribute pressure evenly
around the sleeve fl ange.(For complete information
on bolting dimensions refer to the back cover of this
IOM).
4. VALVE ORIENTATION:
The valve end with the rubber fl ange face should
be installed on the pressure side of the system. The
bill area should be installed facing downstream,
with the “slit” vertically oriented.
The inlet fl ange makes use of the rubber check
valve fl ange as the gasket (additional rubber
gaskets are not required on the inlet fl ange). The
installation bolt torque on the end fl ange bolts are
listed in the table on the back page of this IOM.
1. INSPECTION OF VALVE:
Check fl ange faces of pipe for rough/damaged areas.
Pipeline fl anges must be fl at, properly spaced, and
parallel to achieve proper seal. Tidefl ex
®
Technolo-
gies recommends that pipeline fl anges are serrated
approximately 1/16" deep at 90
o
, in order to prevent
the "creep" of the rubber fl ange of the valve sleeve.
Flanges with an oversized I.D. can cut the sleeve
fl ange, and are not recommended with the Series
37 Valve.
Grind or fi le any sharp edges of pipeline
fl ange to prevent damage to the sleeve. PVC fl anges
may not seal properly, and are not recommended
by Tidefl ex
®
Technologies. If PVC fl anges are used,
metal back up rings should be placed behind the
PVC fl anges in order to prevent yielding. Typically,
PVC fl anges will yield before the valve will seal.
2. GASKETS:
The Series 37 In-line Check Valve is self gasketing,
and does not need a separate gasket.
CAUTION: Do not use any sharp tools such as
a crowbar or screwdriver on the rubber during
installation. Sharp instruments can damage fl ange
faces and cause possible leakage.
The Series 37 Check Valve is a self-contained check
valve for use on low back pressure systems. All check
valves are built for each specifi c application. Back pres-
sures in excess of the maximum rated back pressure
may invert the sleeve and cause valve failure.
OPERATION
Tidefl ex
®
Technologies check valves are custom made
products intended for a specifi c application and have
been designed to respond to criteria unique to that
purpose, such as line pressure, minimum and maximum
backfl ow pressure, and chemical compatibility. Should
the conditions for which the valve has been designed be
altered or change in any way, it could affect the normal
operation of the valve, and/or prevent the valve from
draining completely. Valves made to withstand high
back pressure may not self–drain completely.
NEVER...
Use sharp tools
on rubber sleeve.
NEVER...
Exceed design work-
ing pressure.
NEVER...
Install the valve
backwards.

MAINTENANCE
1. INSPECTION:
Valves should occasionally be inspected for damage
and wear. The inspection period should be deter-
mined by the severity of the service and environment.
If valves are periodically inspected and preventive
maintenance done, the valve will last longer and
operate better.
CAUTION: Do not remove the bolting or valve
parts or bolting with pressure in the line. It is
easy to inspect the valve for obvious problems.
ELASTOMER SLEEVE REPLACEMENT:
1.
A spare replacement check sleeve should be placed
on order when this valve is placed in service.
2.
Remove the existing valve and install the replacement
as specifi ed under
INSTALLATION
.
STORAGE:
If your Series 37 Valve is to be stored for a period
of time prior to installation, the following storage
guidelines will help preserve your valve and as-
sure a trouble free installation.
1.
Store valve in a clean, cool, dry location. Avoid ex-
posure to light, electric motors, dirt or chemicals.
2.
Store valve to prevent other items from contacting
check sleeve or fl anges to prevent possible dam-
age.
3.
Store this manual with the valve, so that it is readily
available at time of installation.
SYMPTOM
:
LEAKAGE AT FLANGE
• Retighten all fl ange bolts uniformly, as explained on
the back cover of this IOM.
SYMPTOM
:
SLEEVE RUPTURE (At juncture of fl anges)
• Excessive back pressure due to water hammer
or pressure surge.
• High velocity of abrasive media with the valve
cracked open.
SYMPTOM
:
CUTS ON FLANGE SURFACE
• Sharp I.D. of mating fl ange.
• Oversized I.D. of mating fl ange.
SYMPTOM
:
SLEEVE INVERTED
• Excessive back pressure.
TROUBLESHOOTING
GUIDE
GUIDE
PART DESCRIPTION
WARRANTIES - REMEDIES - DISCLAIMERS - LIMITATION OF LIABILITY
Unless otherwise agreed to in writing signed by Tidefl ex
®
Tech-
nologies, all Products supplied by Tidefl ex
®
Technologies will be
described in the specifi cations set forth on the face hereof.
THE WARRANTIES SET FORTH IN THIS PROVISION ARE EX-
CLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES WHETHER
STATUTORY, EXPRESS OR IMPLIED (INCLUDING ALL WARRAN-
TIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE AND ALL WARRANTIES ARISING FROM COURSE OF
DEALING OR USAGE OR TRADE).
Tidefl ex
®
Technologies Products are guaranteed for a period of
one year from date of shipment, against defective workmanship
and material only, when properly installed, operated and serviced
in accordance with Tidefl ex
®
Technologies' recommendations.
Replacement for items of Tidefl ex
®
Technologies' manufacture
will be made free of charge if proved to be defective within such
year; but not claim for transportation, labor or consequential
damages shall be allowed. We shall have the option of requiring
the return of the defective product to our factory, with transporta-
tion charges prepaid, to establish the claim and our liability shall
be limited to the repair or replacement of the defective product,
F.O.B. our factory. Tidefl ex
®
Technologies will not assume costs
incurred to remove or install defective products nor shall we
incur backcharges or liquidated damages as a result of warranty
work. Tidefl ex
®
Technologies does not guarantee resistance to
corrosion erosion, abrasion or other sources of failure, nor does
Tidefl ex
®
Technologies guarantee a minimum length of service,
or that the product shall be fi t for any particular service. Failure
of purchaser to give prompt written notice of any alleged defect
under this guarantee forthwith upon its discovery, or use, and pos-
session thereof after an attempt has been made and completed
to remedy defects therein, or failure to return product or part for
replacement as herein provided, or failure to install and operate
said products and parts according to instructions furnished by
Tidefl ex
®
Technologies, or failure to pay entire contract price
when due, shall be a waiver by purchaser of all rights under these
representations. All orders accepted shall be deemed accepted
subject to this warranty which shall be exclusive of any other or
previous warranty, and shall be the only effective guarantee or
warranty binding on Tidefl ex
®
Technologies, anything on the con-
trary contained in purchaser's order, or represented by any agent
or employee of Tidefl ex
®
Technologies in writing or otherwise, not
withstanding implied warranties. TIDEFLEX
®
TECHNOLOGIES
MAKES NO WARRANTY THAT THE PRODUCTS, AUXILIARIES
AND PARTS ARE MERCHANTABLE OR FIT FOR ANY PARTICU-
LAR PURPOSE.
Tidefl ex
®
Technologies Warranty
® Technologies Warranty ®

Recommended Bolt Torque
Valve Size Bolt Size Torque (ft*lb.)
2"
5/8" - 11NC 30
2-1/2"
5/8" - 11NC 40
3"
5/8" - 11NC 40
4"
5/8" - 11NC 30
5"
3/4" - 10NC 40
6"
3/4" - 10NC 30
8"
3/4" - 10NC 40
10"
7/8" - 9NC 40
12"
7/8" - 9NC 50
14"
1" - 8NC 50
16"
1" - 8NC 50
18"
1-1/8" - 7NC 30
20"
1-1/8" - 7NC 30
24"
1-1/4" - 7NC 40
30"
1-1/4" – 7NC 30
36"
1-1/2" – 6NC 40
42"
1-1/2" – 6NC 30
48"
1-1/2" – 6NC 30
54"
1-3/4" – 5NC 50
60"
1-3/4" – 5NC 50
72"
1-3/4" – 5NC 50
Recommended Bolt Torque
Recommended Bolt Torque
Valve Size Bolt Size Torque (ft*lb.)
Recommended Bolt Torque
5/8" - 11NC 30
5/8" - 11NC 40
5/8" - 11NC 40
5/8" - 11NC 30
3/4" - 10NC 40
3/4" - 10NC 30
3/4" - 10NC 40
7/8" - 9NC 40
7/8" - 9NC 50
1" - 8NC 50
1" - 8NC 50
1-1/8" - 7NC 30
1-1/8" - 7NC 30
1-1/4" - 7NC 40
1-1/4" – 7NC 30
1-1/2" – 6NC 40
1-1/2" – 6NC 30
1-1/2" – 6NC 30
1-3/4" – 5NC 50
1-3/4" – 5NC 50
1-3/4" – 5NC 50
Valve Size Bolt Size Torque (ft*lb.)
5/8" - 11NC 30
5/8" - 11NC 40
5/8" - 11NC 40
5/8" - 11NC 30
3/4" - 10NC 40
3/4" - 10NC 30
3/4" - 10NC 40
7/8" - 9NC 40
7/8" - 9NC 50
1" - 8NC 50
1" - 8NC 50
1-1/8" - 7NC 30
1-1/8" - 7NC 30
1-1/4" - 7NC 40
1-1/4" – 7NC 30
1-1/2" – 6NC 40
1-1/2" – 6NC 30
1-1/2" – 6NC 30
1-3/4" – 5NC 50
1-3/4" – 5NC 50
1-3/4" – 5NC 50
Valve Size Bolt Size Torque (ft*lb.)
Valve Size Bolt Size Torque (ft*lb.)
Valve Size Bolt Size Torque (ft*lb.)
Valve Size Bolt Size Torque (ft*lb.)
Valve Size Bolt Size Torque (ft*lb.)
A.
Standard check valves
are built to schedule 40
pipe I.D. and to ANSI
Class 125/150# fl ange
and bolt circle specifi ca-
tions. It is recommended
that the mating fl anges
are fl at, full faced, and
serrated.
B.
It is recommended that
the mating fl ange be ser-
rated to “grip” the rubber
flange. The serrations
should be cut 1/16"
deep, with a 90° angle
tool point. The pitch
should be 8 (eight) cuts
per inch.
C.
When installing a check
valve to a rubber, PVC, or
any “slick” mating fl ange,
we recommend that you
install a metal serrated
gasket between the two
fl anges to assist in the
seal.
D.
When bolting a check
valve to a PVC or Syn-
thetic mating fl ange, use
a split back-up retaining
ring, since the mating
fl ange will yield prior to
generating enough force
on the fl ange faces for a
proper seal.
E.
Always use a “star” pat-
tern when bolting a check
valve.
/16"
1
90°
A.
B.
1
2
3
4
5
6
7 8
C.
D.
E.
E.
INSTALLATION NOTES FOR SERIES 37 CHECK VALVES
Note:
If long, unsupported lengths of steel, plastic,
or synthetic pipe are being used, the pipe may yield
or sag due to the valve weight. This may cause an
inadequate seal between the valve and fl anges.
Be certain suffi cient pipe hangers are used and
properly located to support the total weight of the
valve and the process fl uid.
• Torque values are suggested minimum values.
• Torque all fl ange bolts in a star pattern. First
to 50% of tabulated values, then re-torque to
100% of tabulated values. If greater torque is
required, continue re-torquing in increments of
50% of tabulated values.
• Variables such as surface fi nish on bolt threads,
type of anti-sieze compound used, and surface
fi nish of the mating fl anges all have an effect on
the minimum torque required to obtain a leak
tight fl ange seal.
• Use of a high quality anti-sieze compound on
all bolt threads is recommended.
700 North Bell Avenue
Carnegie, PA 15106
[phone]
FAX [phone]
www.tidefl ex.com