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Diaphragm Valves 3" to 6"

Diaphragm Valves 3" to 6"
2Pages

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1. Hayward guarantees its products against defective material and workmanship only. Hayward assumes no responsibility for damage or injuries resulting from improper installation, misapplication, or abuse of any product. 2. Hayward assumes no responsibility for damage or injury resulting from chemical incompatibility between its products and the process fluids to which they are subjected. Compatibility charts provided in Hayward literature are based on ambient temperatures of 70F and are for reference only. Customer should always test to determine application suitability. 3. Consult Hayward literature to determine operating pressure and temperature limitations before installing any Hayward product. Note that the maximum recommended fluid velocity through any Hayward product is eight feet per second. Higher flow rates can result in possible damage due to the water hammer effect. Also note that maximum operating pressure is dependent upon material selection as well as operating temperature. 4. Hayward products are designed primarily for use with non-compressible liquids. They should NEVER be used or tested with compressible fluids such as compressed air or nitrogen. 5. Systems should always be depressurized and drained prior to installing or maintaining Hayward products. 6. Temperature effect on piping systems should always be considered when the systems are initially designed. Piping systems must be designed and supported to prevent excess mechanical loading on Hayward equipment due to system misalignment, weight, shock, vibration, and the effects of thermal expansion and contraction. 7. Because PVC and CPVC plastic products become brittle below 40F, Hayward recommends caution in their installation and use below this temperature. 8. Published operating torque requirements are based upon testing of new valves using clean water at 70F. Valve torque is affected by many factors including fluid chemistry, viscosity, flow rate, and temperature. These should be considered when sizing electric or pneumatic actuators. 9. Due to differential thermal expansion rates between metal and plastic, transmittal of pipe vibration, and pipe loading forces DIRECT INSTALLATION OF METAL PIPE INTO PLASTIC CONNECTIONS IS NOT RECOMMENDED. Wherever installation of plastic valves into metal piping systems is necessary, it is recommended that at least 10 pipe diameter in length of plastic pipe be installed upstream and downstream of the plastic valve to compensate for the factors mentioned above. > RECOMMENDED FLANGE BOLT TORQUE FOR HIGH PERFORMANCE BUTTERFLY VALVES Size Nominal Minimum Pipe / Flange Bore (In.) Stud Dia (In.) Bolt Dia (In.) Thread Flat Face Type Flange Torque Ft * Lb. Van-Stone Type Flange Torque Ft * Lb. 3 2.830 5/8 5/8 11 UNC 20-25 10-20 4Ԕ 3.750 5/8 5/8 11 UNC 20-25 10-20 6 5.680 3/4 3/4-10 UNC 30-40 10-20 8Ԕ 7.540 3/4 3/4-10 UNC 30-40 20-30 10 9.470 7/8 7/8- 9 UNC 50-60 40-50 > When installation is complete, check for proper alignment. Maximum operation pressure at ambient temperature is listed on the following charts. See the following Charts pressure derating at temperature. >

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DVIS REV A ECR 406S 01/04/2001 06U9.DOC REPAIR: Maintenance on the diaphragm valves is generally limited to the replacement of the diaphragms. The diaphragm life is affected by application and frequency of cycle. EXTREME CAUTION MUST BE TAKEN WHEN WORKING ON THIS VALVE. THE PIPING SYSTEM MUST BE DEPRESSURIZED AND DRAINED. PROPER CARE MUST BE TAKEN. CONSULT M.S.D.S. (MATERIAL SAFETY DATA SHEETS) INFORMATION REGARDING YOUR SPECIFIC APPLICATION. There is no need to remove the valve from the line to replace the diaphragm. Bolts hold the bonnet to the valve body, sandwiching the diaphragm. The...

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Diaphragm Valves 3" to 6" 2Pages

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Diaphragm Valves 3" to 6"
2Pages