Series 37 IOM

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The latest installation, operation and maintenance manual for Tideflex Series 37 flanged duckbill inline valves from Red Valve.
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1. The revolutionary design of the Series 37 In–Line Check Valve provides absolute backflow protec - tion. This unique “duck bill” design eliminates costly backflow from oceans, rivers or storm water and is the ideal valve for effluent diffuser systems. The Series 37 Check Valve is available in a wide variety of elastomers and is designed to meet your exact flow specifications. Series 37 valves are constructed with 125# ANSI flanges, 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. 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. Division of Red Valve,Inc.

2. INSTALLATION 3. INSTALLING FLANGE BOLTS: Tighten all bolts uniformly to distribute pressure evenly around the sleeve flange.(For complete information on bolting dimensions refer to the back cover of this IOM). 4. VALVE ORIENTATION: The valve shall be installed with the bill in the vertical position. The valve end with the rubber flange 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 flange makes use of the rubber check valve flange as the gasket (additional rubber gaskets are not required on the inlet flange). The installation bolt torque on the end flange bolts are listed in the table on the back page of this IOM. 1. INSPECTION OF VALVE: Check flange faces of pipe for rough/damaged areas. Pipeline flanges must be flat, properly spaced, and parallel to achieve proper seal. Tideflex ® Technolo - gies recommends that pipeline flanges are serrated approximately 1/16" deep at 90 o , in order to prevent the "creep" of the rubber flange of the valve sleeve. Flanges with an oversized I.D. can cut the sleeve flange, and are not recommended with the Series 37 Valve. Grind or file any sharp edges of pipeline flange to prevent damage to the sleeve. PVC flanges may not seal properly, and are not recommended by Tideflex ® Technologies. If PVC flanges are used, metal back up rings should be placed behind the PVC flanges in order to prevent yielding. Typically, PVC flanges 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 flange 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 specific application. Back pres - sures in excess of the maximum rated back pressure may invert the sleeve and cause valve failure. OPERATION Tideflex ® Technologies check valves are custom made products intended for a specific application and have been designed to respond to criteria unique to that purpose, such as line pressure, minimum and maximum backflow 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 working pressure. NEVER... Install the valve backwards.

3. 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 specified 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 flanges 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 flange bolts uniformly, as explained on the back cover of this IOM. SYMPTOM : SLEEVE RUPTURE (At juncture of flanges) • 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 flange. • Oversized I.D. of mating flange. SYMPTOM : SLEEVE INVERTED • Excessive back pressure. TROUBLESHOOTING PART DESCRIPTION WARRANTIES - REMEDIES - DISCLAIMERS - LIMITATION OF LIABILITY Unless otherwise agreed to in writing signed by Tideflex ® Tech - nologies, 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 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). 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 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. Tideflex ® 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. 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 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 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 con - trary 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 PARTICU - LAR PURPOSE. Tideflex ® Technologies Warranty

4. 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 A. Standard check valves are built to schedule 40 pipe I.D. and to ANSI Class 125/150# flange and bolt circle specifica - tions. It is recommended that the mating flanges are flat, full faced, and serrated. B. It is recommended that the mating flange 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 flange, we recommend that you install a metal serrated gasket between the two flanges to assist in the seal. D. When bolting a check valve to a PVC or Syn - thetic mating flange, use a split back-up retaining ring, since the mating flange will yield prior to generating enough force on the flange faces for a proper seal. E. Always use a “star” pat - tern when bolting a check valve. / 16 " 1 90 Υ A. B. 1 2 3 4 5 6 78 C. D. 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 flanges. Be certain sufficient pipe hangers are used and properly located to support the total weight of the valve and the process fluid. • Torque values are suggested minimum values. • Torque all flange 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 finish on bolt threads, type of anti-sieze 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. • Use of a high quality anti-sieze compound on all bolt threads is recommended. 600 North Bell Avenue Carnegie, PA 15106 (412) 279-0044 FAX (412) 279-7878 www.tideflex.com Division of Red Valve,Inc. 37 IOM 5/18

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