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M&H VALVE COMPANY

AWWA C504-00

BUTTERFLY VALVES

CLASS 150 & 250

SIZES 3” THRU 72”

Summary of Contents for 1450

Page 1: ...M H VALVE COMPANY AWWA C504 00 BUTTERFLY VALVES CLASS 150 250 SIZES 3 THRU 72 ...

Page 2: ... 2 3 Installation Safety 9 2 4 Inside Diameter of Mating Pipe 9 2 4D Mating Pipe Inside Diameter Drawing 10 2 5 Pipe Connection 11 2 5 1 Mechanical Joint Follower Glands 11 2 5 2 Flanged End Connections 11 2 5D Valve Body Lay Length Dimensions 12 2 6 Assembly 13 3 Pressure Testing of M H BFVs 15 3 1 General 15 3 2 Mechanical Issues 15 3 3 Compressed Air 15 3 4 Hydrostatic Test 16 3 5 Service Suppo...

Page 3: ...e Seat Ring 21 5 3 2 2 30 thru 72 Installation of New Vane Seat Ring 22 5 3 2 3 Service Details 22 5 4 M H BFV Traveling Nut Operator 23 5 4 1 General 23 5 4 2 External Obstruction 23 5 4 3 Internal to the Operator Obstruction 24 5 4 4 Internal to the Valve Obstruction 24 5 5 Vane Level Adjustment 25 5 5 1 Vane Level Adjustment Procedure for 3 thru 12 BFVs 25 5 5 2 Vane Level Adjustment Procedure ...

Page 4: ...ru 20 Mechanical joint x flanged ends are generally produced up to the 16 size Rubber seated butterfly valves are designed to provide a 100 shut off at operating pressures in accordance with AWWA C504 The current C504 standard covers pressure ratings from 25 to 250 psi with velocities from 8 to 16 fps The most used rating is Class 150B which is a 150psi pressure rating at 16fps flow rate C504 also...

Page 5: ...ility without disassembly of the shaft vane assembly SECTION 1 5 SHAFT VANE DESIGN AWWA C504 covers the use of either a single piece shaft or a two piece stub shaft A single piece shaft is common for the 3 thru 12 sizes For 14 larger sizes a stub shaft is common Stub shafts allow enhanced flow characteristics by use of a recessed vane back design and or open vane structure For corrosion resistance...

Page 6: ...ose with very specific design criteria When specifying pricing or ordering automated valves the information required includes pressure velocity open close or modulating service available power supply control requirements and type of protective enclosure A data sheet that more fully covers application conditions is available on the following page For automation of existing manual operator installat...

Page 7: ...lating Maximum Temp Type Motor Weather explosion proof Etc Type of Reversing Controller Nema Class Type of Pushbutton Station Nema Class Pushbutton Station Control Voltage Special Requirements Suggested Operator Estimating Cost Price Quote Delivery Prior to order complete specifications and operating conditions will be required M H will warranty valves with automation installed as per AWWA C504 Se...

Page 8: ...ically retained seat on the vane provides for adjustment or replacement with relative ease It is recommended that BFVs be installed with the seat side positioned for best access to the seat for future maintenance Foreign material in a butterfly valve can damage the rubber seat when valves are operated Be sure interiors and adjacent piping is cleaned of foreign material prior to assembling the pipe...

Page 9: ...ther applicable standards Individual states may have more stringent regulations Contact the appropriate state agency before any work is begun for additional information and any potential permitting requirements SECTION 2 4 INSIDE DIAMETER OF MATING PIPE The Inside Diameter ID of the mating of the piping system should be considered BEFORE installing the valve When BFVs open the vane will extend int...

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Page 11: ...he torque on the nuts should be uniform utilizing an alternating star pattern with as many as five repetitions of tightening to assure even torque stress c The MJ bolts should be torqued in accordance with the AWWA C111 specification See the chart below for a quick reference Torques in excess of the recommendations below may damage the BFV the Mechanical Joint gland or both Valve Size Bolt Size Ra...

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Page 13: ...8 1 9 16 1 1 8 7 UNC 4 20 1 11 16 1 1 8 7 UNC 4 24 1 7 8 1 1 4 7 UNC 4 30 2 1 8 1 1 4 7 UNC 4 DOM 8 IMP 36 2 3 8 1 1 2 6 UNC 4 DOM 6 IMP 42 2 5 8 1 1 2 6 UNC 4 48 2 3 4 1 1 2 6 UNC 8 54 3 1 3 4 5 UNC 12 60 3 1 8 1 3 4 5 UNC 12 66 3 3 8 1 3 4 5 UNC 12 72 3 1 2 1 3 4 5 UNC 12 DOM Domestic Valve IMP Imported Valve If it is determined to use a bolt rather than a stud add the tapped bore dimension plus...

Page 14: ...ear a bend in a pipeline without proper adequate restraint to support the valve and prevent it from blowing off the end of the line It is good engineering practice to consider whether or not thrust blocks restrained joints or other means of restraint are needed on or adjacent to valves on pipelines and or where unusual conditions exist such as high internal pressures adjacent fittings or unsuitabl...

Page 15: ...es that Foreign material left in pipeline during installation often results in valve or hydrant leakage during pressure testing This remains a common cause of testing failure relating to valves hydrants Thorough flushing of the waterline is recommended prior to pressure testing and help to remove any foreign matter inadvertently left in the line Performing an inspection of the valve prior to insta...

Page 16: ...et the requirements of AWWA C504 Class 150B Requirements for higher pressure rated valves such as CL 250B must be specifically noted at the time of purchase Leakage for pipeline testing is defined as the quantity of water that must be supplied to maintain pressure within 5 psi of the specified test pressure AWWA C600 sec 4 1 5 Allowable leakage in gallons per hour for pipelines with rubber seated ...

Page 17: ...ed before actuating the valves SECTION 4 3 THROTTLING The M H traveling nut operator is designed hold in place at any intermediate position and not allowing line flow to move the vane Throttling operations that generate velocities up to 16 feet per second fps are acceptable and covered in the AWWA standard for class B However a BFV is not considered a pressure regulating valve and is not designed ...

Page 18: ...1450 butterfly valves BFV are sized to meet requirements of AWWA C504 CL150B Standard applications utilize the following operators SIZE MODEL TURNS 3 THRU 12 FA12 29 14 THRU 20 1250 FA16 48 24 2200 FA25 72 30 36 CL150B 2200 72 36 CL250B 42 4350 90 48 THRU 72 CONSULT FACTORY TBD NOTE At the customer s request M H BFVs may be equipped with alternate third party operators that meet the needs of a spe...

Page 19: ...the appropriate state agency before any work is begun for additional information and any potential permitting requirements SECTION 5 2 VANE SEAT RING ADJUSTMENT Sizes 3 thru 72 1 If there is a small leak at a specific location around the circumference of the vane this may be corrected by adjusting the Vane Ring Bolts on the Vane 2 Before attempting to adjust the bolts open the valve fully and insp...

Page 20: ...ith vane in the closed position remove seat retention screws 2 Open valve approximately 20 degrees to remove the seat NOTE For 3 thru 24 valves the Vane Ring Rubber is molded to the stainless steel insert They are one unit and can only be removed from the valve as one piece 3 Lift the near side seat edge up from the seat recesss area and using a rubber mallet or hammer block of wood tap lightly on...

Page 21: ...not hold pressure then consult the factory 5 For 14 thru 24 BFVs a Set the torque wrench to 160in lbs torque all of the bolts down to 160in lbs in an alternating star pattern as shown in the picture below b Increase the setting on the torque wrench to 180in lbs and repeat the process c Pressure test the valve If the valve holds the rated pressure then the process is done d If the valve does not ho...

Page 22: ...ntly work the Vane Seat Ring free keeping in mind that resistance may be encountered at areas of contact near the shaft locations Forcible removal may damage the seat and prohibit reuse if desired 6 Clean any debris grease or coating material from seat recess on vane and from stainless steel seating surface in the valve body Section 5 3 2 2 30 thru 72 INSTALLATION OF NEW SEAT 1 With the existing V...

Page 23: ...rated pressure then the process is done e If the valve does not hold increase the setting on the torque wrench to 220in lbs and a repeat the process f If the valve holds the rated pressure then the process is done If the valve still does not hold pressure then consult the factory 6 Retest the valve as necessary in accordance with AWWA C504 sec 5 2 2 2 Section 5 3 1 3 30 thru 72 SERVICE DETAILS 1 P...

Page 24: ...erence due to backfill material becoming wedged between the op nut and thrust plate Binding can be checked by removing or loosening the operating nut 3 An improperly fitted operating nut may cause it to lean to the point of contacting the thrust plate Loosening the op nut can confirm this possibility 4 Confirm the thrust plate is securely mounted on the operator housing If the thrust plate has bec...

Page 25: ... has good movement from the Open position but binds as it approaches the Closed Position it is likely that there is an obstruction in the line preventing the valve from fully closing 5 The only way to verify an internal obstruction to gain access to the inside of the piping system to BFV vane 6 If there is an internal obstruction the vane must be accessed to physically remove the obstruction Secti...

Page 26: ...place 6 Move the vane out of the seat area and then back into the seat to confirm that the adjustment leveled the vane Section 5 5 3 Vane Level Adjustment Procedure for 48 thru 72 BFVs M H does not manufacture a traveling nut operator for valves this size Third party worm gears are normally provided for valves of this size For maintenance and adjustment procedures for these types of operators plea...

Page 27: ...ve ground use it is easily painted over to match customer piping paint schemes 2 In some instances M H will use TNEMEC Pota Pox N141 two part epoxy N141 is NSF61 and UL approved and meeting the requirements of AWWA C550 N141 can be used for field coating and touch up uses It adheres well to the FBE used above When field applying N141 make sure to follow all of the manufacturer s recommend applicat...

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