A Division of Red Valve, Inc.
CHECKMATE ®
INLINE CHECK VALVES
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
The revolutionary design of the CheckMate® Inline Check Valve
provides superior backflow prevention and odor mitigation in
stormwater, CSO and SSO outfalls. The CheckMate's® custom-
engineered, all-rubber unibody design eliminates costly back-
flow from oceans, rivers and interceptors. The valve's unique
elastomer fabric and wire reinforced design provides a proven
record of maintenance-free performance, cost savings and
results that no other inline check valve can match. The Check-
Mate® is built to suit all your site-specific and flow needs.
The CheckMate® has a 100% fabric and elastomer construction
that eliminates corrosion problems. Because the CheckMate®
is made with a unibody construction, there are no mechanical
components that trap debris, corrode or fail.
The CheckMate® Valve's inherent flexibility virtually eliminates
seating problems. The CheckMate® remains in the closed posi-
tion until forward differential pressure opens it. The fabric-rein-
forced elastomer CheckMate® Valve seals around silt and small
debris, preventing unwanted backflow.
The major advantage of the CheckMate® Valve is its extremely
low headloss. The CheckMate® can open to a near full pipe
diameter. This maximizes flow capacity of the outfall, which is
particularly beneficial in low-lying areas where limited driving
head is available.
Tideflex® Technologies recommends pinning all CheckMate®
Valves for added security and stability. CheckMate’s® effectively
have a zero face-to-face dimension because they fit completely
inside of the pipe. No modification of piping is required provided
adequate pipe length exists.
IMPORTANT
Please take a moment to review this manual. The improper installation or use of this product may result in
personal injury, product failure, or reduced product life. Tideflex® 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 (412) 279-0044. We appreciate your comments. Thank you for choosing Tideflex® Technologies.
CheckMate® Installation Procedure
NEVER... NEVER... NEVER... NEVER...
Install the valve at an angle Use Sharp Tools on Rubber Exceed Design Back Pressure Install the Valve Backwards
Body Cuff
Wire Reinforcement
Clamp*
• • • • • • • • • • • •
Saddle
Extraction Hole Extraction Hole
FLOW Bill (Sealing Area)
Cuff
*Clamps are installed in the upstream or downstream cuff, depending upon the application.
The illustration above is shown clamped upstream.
CHECKMATE® INSTALLATION
1. Product Shipping 3. Inspection of Pipe I.D.
Valve sizes 2" - 18" are furnished with one clamp. Valves 20" - 60" Check the inside diameter (I.D.) of the pipe section for rough or
ship with two clamps. 72" valves ship with three clamps. damaged areas. The inside surface should be uniform and relatively
smooth. Long gouges or cracks in the pipe may allow water to pass
NOTE: A clamp is installed on each end of the valve to keep the and should be filled prior to installation. Do not attempt to install a
valve’s shape during transit and storage. Once the installation CheckMate® in a smaller pipe I.D.
orientation is determined the CheckMate® valve will be clamped
from either the upstream or downstream side. For valves with two 4. Pipe I.D. Measurements
or three clamps, they can be installed onto the same side of the
valve and offset from each other, as illustrated in Figure 1. The pipe I.D. is to be checked in the field. It should be a consistent
diameter for the length of valve and should not be out of round.
2. Unpacking & Lifting When there is a +/- tolerance on the pipe I.D., the CheckMate® Valve
should be ordered to the smallest pipe I.D.. Then, rubber adhesive
Do not use sharp tools when unpacking this product as it may strip can be applied to both CheckMate® cuffs to build the cuff O.D.
damage the valve. up to the actual pipe I.D. See procudure in #5.
For larger CheckMate® valves, the valve should be lifted with either
a sling or with supports around the O.D. at each side of the valve to
ease the installation procedure. Do not place an object through the
valve in order to lift.
CAUTION: Do not try to bend, collapse or fold the valve in order
to facilitate the installation as this will cause permanent dam-
age and will not allow the valve to return to a fully round shape.
Figure 1 – Clamps shown installed on the same side of valve
2
CheckMate® Rubber Adhesive Strip Build Up Procedure
5. Rubber Adhesive Strip Build up
When valve O.D. is smaller than the pipe I.D., one-sided rubber NOTICE: Clean and dry the exterior of the valve prior to beginning
adhesive strip is used to build up the O.D. of both CheckMate® cuffs rubber adhesive strip build up procedure.
to the actual pipe I.D.
STEP A: Place the valve on a solid, flat surface with the clamped end STEP B: Slowly rotate the valve while firmly pressing the rubber
hanging slightly over the edge of the surface. adhesive strip onto itself in concentric layers until valve O.D. is equal
to or a fraction smaller than pipe I.D.
STEP C: Repeat steps A and B on the opposite side of the valve STEP D: Lubricate the valve and rubber adhesive strip surface. Slide
to ensure uniformity of the CheckMate’s® O.D. is consistent and valve into pipe. Ensure the area marked TOP is in the 12:00 position.
matches the pipe I.D.
STEP E: Check O.D. of the valve to ensure it fits snugly into the I.D. of STEP F: Once in place, tighten the clamp to secure it against the
pipe. If loose, add another layer(s) of the rubber adhesive strip. pipe and compress the rubber ahesive strip.
3
CheckMate® Installation Procedure
6. Preparation 10. Insertion Into Pipe
The CheckMate® Valve uses expanding clamp(s) to exert pressure Clamp to support the shape of the cuff should be hand tight and
outwards on the walls of the valve to wedge it in place within the should be extended outward, but only tight enough to loosely keep
pipe. The walls of the pipe should be clean and free of debris prior the shape of the cuff during installation.
to installation.
CAUTION: If you expand the clamp excessively at this step it
The valve should be inserted fully into the pipe so that no part of will hinder or prevent the CheckMate® valve being fully inserted
the cuff or bill extends outside the pipe. Ensure that the valve is not into the pipe.
slanted at an angle with the bill pointing upwards or downwards.
The valve centerline should be parallel to the pipe centerline.
Tideflex® Technologies recommends pinning the CheckMate® Valve
on all installations. See below. CheckMate® Clamping Diagrams
Four pre-drilled holes are provided in each expansion clamp. At Downstream Clamp
least one clamp should be pinned. On exposed pipe, holes can be
drilled through the valve and pipe, Flow Flow
and a bolt run through secured
with a nut. For buried pipe, silicon
or similar sealant should be used
to seal bolts. Downstream Flanged
7. Lubrication
Flow
The outside of the valve can be lubricated with a water-based
lubricant prior to inserting the valve into the pipe. If the taping
procedure has been used, the surface of the tape can be lubricate to
aid insertion. Downstream Flanged Thimble Insert
CAUTION: Do not use petroleum-based lubricants on this Flow
product or on the vulcanized rubber tape.
8. Plumb Lines and Arrows
The CheckMate® Valve arrives with a “top” arrow, “flow” arrow and
plumb lines, marked in white, at the 12:00 and 6:00 position of the Upstream Clamp
valve. Utilize this marking to orient the valve in the pipe, as well as Flow
to ensure the valve is oriented correctly in pipe section.
9. Valve Orientation
Upstream Flanged
The CheckMate® Valve must be installed in a horizontal pipe. Valves
4" – 18" (nominal) are supplied with a single clamp. The clamp
turnbuckle should be oriented at top dead center as delinated by the Flow
plumb line.
Valves 20” – 60” (nominal) are supplied with two clamps. The
turnbuckles should be oriented 45° from the top center plumb line.
Upstream Flanged Thimble Insert
The 72” is supplied with three clamps. The turnbuckle for one clamp
to be at top center. The other clamps to be 45° to each side of top Flow
center.
4
11. Pallet Push for Larger CheckMate® Valves 12. Corrugated Pipe and Smooth Wall (PVC, HDPE)
Pipe Installation
Larger CheckMate® valves can be pushed into the pipe utilizing the
shipping pallet. The pallet should be placed perpendicular to the For installation on corrugated pipe, it is recommended that the cor-
valve being inserted into the pipe. Then, with assistance from an rugations be filled with hydraulic cement (or similar material) that
excavator, push with consistent even force against the shipping pal- will provide a smooth I.D.
let to insert the CheckMate® valve into the pipe.
For smooth wall pipe, it is recommended that the valve be pinned.
See the image to the right for the suggested positioning and usage
of the excavator’s shovel assistance for larger-sized CheckMate®
valves. Clamps must be installed to prevent damage to cuff.
Pallet Push method for installing CheckMate® Valve
5
13. Flanged Valve Bolt Torques
The valve end with the rubber flange shall be installed using the
backup rings provided. The sleeve split should be installed facing
downstream, with the split in the vertical position.
The installation bolt torque on the end flange bolts are listed in the
table below.
RECOMMENDED MINIMUM BOLT TORQUE
Valve Size Bolt Size Torque (ft*lb.)
1” 1/2” - 13NC 20
1-1/2” 1/2” - 13NC 20
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 50
48” 1-1/2” – 6NC 55
54” 1-3/4”– 5NC 60
60” 1-3/4”– 5NC 80
72” 1-3/4”– 5NC 100
Torque values are suggested minimum values.
Torque all flange bolts in a star pattern, first to 50% of tabulated
values, then retorque to 100% of tabulated values. If greater torque
is required, continue retorquing in increments of 50% of tabulated
values. Use of a high quality anti–seize compound on all bolt threads
is recommended.
1 6
4 3
Always use a “star” pattern when
bolting a check valve.
7 8
2 5
Variables such as the surface finish on bolt threads, type of anti–
seize compound used, and surface finish of the mating flanges all
have an effect on the minimum torque required to obtain a leak–
tight flange seal.
During installation you may need to retorque the flange bolts several
times for a proper seal. This will overcome any leaks due to the cold
flow of the rubber sleeve flange.
6
CheckMate Installation Notes ® The clamps should be checked for proper tension, and be sure that the
inside of the valve is free of debris. Soft marine growth is normal on
valves in submerged applications. Because hard marine growth such
as barnacles will not bond well to the CheckMate®, they can be easily
removed. Also insert pins to ensure they are tight.
1. It is important that the CheckMate® is installed level within the
pipe. The CheckMate® may "gap open" if installed improperly.
2. The sealing area of the CheckMate® must have room to expand STORAGE
outwards, while bottom of the sealing area rises. The area around the
sealing area must be kept free of debris to allow the bill to close in If your CheckMate®, is to be stored for a period of time prior to installa-
order for the valve to seal properly. tion, the following storage guidelines will help to preserve the valve and
assure a trouble-free installation:
3. The CheckMate® effectively reduces the inside diameter of the
pipe in which it is installed, creating a restriction. It may also create a 1. Store in a clean, cool, dry location. Avoid exposure to light, electric
"ledge" inside the pipe, causing standing water. motors, dirt, or chemicals.
2. Store valve vertically on floor or pallet.
4. Back pressure in excess of the back pressure rating may cause
3. Store valve to prevent other items from contacting check sleeve to
valve failure.
prevent possible damage.
4. Store this manual with the valve, so that it is readily available at
5. Should the conditions that the CheckMate® was designed for
time of installation.
change, (line pressure, back pressure, chemical compatibility) the
performance of the valve may suffer.
6. CheckMate® Valves must be installed in true round pipe which is TROUBLESHOOTING GUIDE
concentric across the entire length. Out of round pipe may cause the
sealing area of the valve to distort and gap, which will cause the valve Sleeve Inverted or Distorted
to leak. 1. Excessive back pressure, water surge, or water
hammer.
Leaking Around Perimeter of Valve
1. Tighten clamp.
MAINTENANCE 2. Check for cracks and holes in surface of pipe.
3. If taped, check tape to ensure the pipe I.D. has
Inspection been fully sealed
Valves should occasionally be inspected for damage, wear, and Backflow
buildup of debris. The frequency of the inspections should be deter- 1. Debris lodged inside bill.
mined by the severity of the service and the environment in which it
operates.
TIDEFLEX ®
TECHNOLOGIES WARRANTY
WARRANTIES - REMEDIES - DISCLAIMERS - LIMITATION OF LIABILITY
Unless otherwise agreed to in writing signed by Tideflex® Technologies, all Products supplied by Tideflex® Technologies will be described in the specifications set forth on the face hereof.
THE WARRANTIES SET FORTH IN THIS PROVISION ARE EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES WHETHER STATUTORY, EXPRESS OR IMPLIED (INCLUDING ALL WARRANTIES OF MERCHANT-
ABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND ALL WARRANTIES ARISING FROM COURSE OF DEALING OR USAGE OR TRADE).
Tideflex® 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 Tideflex® Technologies' recommendations. Replacement for items of Tideflex® 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 transportation 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. Tideflex® Technologies will not assume costs incurred to remove
or install defective products nor shall we incur back charges or liquidated damages as a result of warranty work. Tideflex® Technologies does not guarantee resistance to corrosion erosion, abrasion
or other sources of failure, nor does Tideflex® Technologies guarantee a minimum length of service, or that the product shall be fit 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 possession 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 Tideflex® 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 Tideflex® Technologies, anything on the contrary contained in purchaser’s order, or represented by any
agent or employee of Tideflex® 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 PARTICULAR PURPOSE.
600 North Bell Avenue
Carnegie, PA 15106
Phone: 412 279-0044
Fax: 412 279-7878
Web: www.tideflex.com CheckMate® IOM 8/30/17
7
