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Butterfly valves class 150 & 250 sizes 3” thru 72”
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- Contents
- Table of Contents
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Table of Contents
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Table of Contents
- 1 Butterfly Valves for Water Works Applications
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Applications
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AWWA Specification
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Introduction
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Actuation
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Seat Design
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Automation
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Coating
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F Automated Valve Information Form
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General
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Inside Diameter of Mating Pipe
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Installation Safety
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D Mating Pipe Inside Diameter Drawing
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Pipe Connection
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Flanged End Connections
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Mechanical Joint Follower Glands
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D Valve Body Lay Length Dimensions
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Assembly
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General
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Mechanical Issues
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Compressed Air
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Hydrostatic Test
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Service Support
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General
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Input Torque
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Throttling
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Water Hammer
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Turns to Open
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Safety
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Vane Seat Ring Adjustment - Sizes 3" Thru
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Vane Seat Ring Replacement
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3" Thru 24" Removal of Existing Vane Seat Ring
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3" Thru 24" Installation of New Vane Seat Ring
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30" Thru 72" Removal of Existing Vane Seat Ring
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Service Details
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30" Thru 72" Installation of New Vane Seat Ring
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Service Details
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General
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External Obstruction
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Internal to the Operator Obstruction
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Internal to the Valve Obstruction
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Vane Level Adjustment
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Vane Level Adjustment Procedure for 3" Thru 12" Bfvs
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Vane Level Adjustment Procedure for 14" Thru 42" Bfvs
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Vane Level Adjustment Procedure for 48" Thru 72" Bfvs
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Protective Coatings
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- 5 Maintenance
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M&H VALVE COMPANY
AWWA C504-00
BUTTERFLY VALVES
CLASS 150 & 250
SIZES 3" THRU 72"
Table ofContents
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Table of Contents
Summary of Contents for M&H 4500
- Page 1 M&H VALVE COMPANY AWWA C504-00 BUTTERFLY VALVES CLASS 150 & 250 SIZES 3” THRU 72”...
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Page 2: Table Of Contents
TABLE OF CONTENTS Section Title Page Butterfly Valves for Water Works Applications Introduction AWWA Specification Applications Seat Design Shaft & Vane Design Actuation Automation Coating 1.7F Automated Valve Information Form Installation & Testing General Unloading & Storage Installation Safety Inside Diameter of Mating Pipe 2.4D Mating Pipe Inside Diameter Drawing Pipe Connection... - Page 3 Maintenance Safety Vane Seat Ring Adjustment – Sizes 3” thru 72” Vane Seat Ring Replacement 5.3.1.1 3” thru 24” Removal of Existing Vane Seat Ring 5.3.1.2 3” thru 24” Installation of New Vane Seat Ring 5.3.1.3 Service Details 5.3.2.1 30” thru 72” Removal of Existing Vane Seat Ring 5.3.2.2 30”...
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Page 4: Butterfly Valves For Water Works Applications
SECTION 1 BUTTERFLY VALVES FOR WATER WORKS APPLICATIONS SECTION 1.1 – INTRODUCTION The M&H butterfly valve (BFV) was introduced in 1965 for clean water applications. The rubber seat provides a ‘zero leakage’ alternative to the metal-seated valves used at that time. BFVs offer flow control advantages and economy vs. -
Page 5: Seat Design
elements. EPDM rubber is used for the main seals of the BFV and has nominal temperature rating of 225 degrees F. The EPDM seals should not be used in any situation where contact with even trace amounts of petroleum-based products may occur. Throttling operations that generate velocities up to 16 feet per second (fps) are acceptable as covered in the C504 standard for class B. -
Page 6: Automation
IMPORTANT – Do not remove a BFV operator while under flow and pressure. Without an operator in place holding the vane, a BFV will try to close in the presence of flow and can create a hazardous water hammer situation. Also, the operator may serve to retain shaft seals, which could be ejected without the operator mounted on the valve. -
Page 7: F Automated Valve Information Form
AUTOMATED VALVE INFORMATION FORM Date: Project: Engineer: Bid Date: Quantity Size Valve type Pressure Class Max Operating PSI Service Current (Voltage/Phase) Open / Close Time Open Close Service Throttling Modulating Maximum Temp Type Motor, Weather/explosion proof. Etc Type of Reversing Controller, Nema Class Type of Pushbutton Station, Nema Class Pushbutton Station Control Voltage... -
SECTION 2 INSTALLATION OF M&H MODEL 4500 &1450 BFVS SECTION 2.1 – GENERAL Butterfly valves are an important part of any water distribution system or treatment plant operation. Valve failure due to faulty installation, improper operation, or maintenance in such systems could result in damage, down time, and costly repairs.
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Page 9: Installation Safety
SECTION 2.3 – INSTALLATION SAFETY Before any installation of BFVs begins, make sure that all related safety procedures and protocols are followed. For Buried Service BFVs, any work to be done in an open trench should be in accordance with OSHA regulation CFR 1926, Subpart P “Excavations”. -
Page 10: D Mating Pipe Inside Diameter Drawing
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Page 11: Pipe Connection
SECTION 2.5 – PIPE CONNECTIONS For connecting pipe to the BFV, do not deflect the pipe to connect the valve. Do not use as a jack to pull into alignment. As much as reasonably possible, the BFV should be in an “unconstrained” position with the weight of the valve being supported independently of the pipe connection. -
Page 12: D Valve Body Lay Length Dimensions
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Page 13: Assembly
All bolting patterns are in accordance with ANSI B16.1. Bolt torques for flanged valves should be based on the yield strength of the bolt. Due size and casting restrictions, BFV sizes 14” and larger have some . These are located around the Operator or number of tapped holes (instead of thru holes) in the flanges Thrust Ends. - Page 14 Butterfly valves having an AWWA C550 epoxy coating must be checked for an uneven finish or runs. If allowed by the project specifications - use a mild abrasive to smooth the flange end surface. Rubber gaskets must be suitable for cold water service and compatible with any other special requirements of the application.
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SECTION 3 PRESSURE TESTING OF M&H BUTTERFLY VALVES SECTION 3.1 – GENERAL Testing of newly installed waterlines is a time-consuming process that can be complicated by failure to retain specified pressures. This information is intended to aid in both the prevention of - and determining the source of - a waterline testing problem.
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Page 16: Compressed Air
SECTION 3.3 – COMPRESSED AIR The foremost consideration regarding air in line is operational safety. When a waterline is installed or repaired it is essential to properly bleed off all air within the pipeline. Keep in mind that, unlike water, air compresses and can create an extraordinary hazard - multiplying the effect of water hammer. -
SECTION 4 OPERATION OF M&H BFVS WITH TRAVELING NUT OPERATORS SECTION 4.1 – GENERAL Operational criteria for rubber seated Butterfly Valves (BFV) is covered is in the Appendix section of AWWA C504. Briefly stated, some of the important information includes: ...
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Page 18: Turns To Open
SECTION 4.5 – TURNS TO OPERATE M&H Valve traveling nut operators for the #4500 / #1450 butterfly valves (BFV) are sized to meet requirements of AWWA C504 CL150B. Standard applications utilize the following operators. -
Page 19: Maintenance
SECTION 5 MAINTENANCE OF M&H BUTTERFLY VALVES SECTION 5.1 – SAFETY Before any maintenance or service work is conducted on an M&H BFV, whether above or below ground, all potential safety issues should be considered. For In-Plant BFVs, all work should be done in accordance with ASME Pressure Vessel Code and other applicable standards. -
Page 20: Vane Seat Ring Replacement
Using the measured torque amount, increase the torque wrench setting by 20in-lbs. Re-torque 3 to 5 of the bolts around the leak. Repressure test the valve. If the valve still leaks, this step can be done once more. If the valve still leaks after the second attempt, the Vane Seat Ring may need replacement. -
Page 21: Service Details
ring as best as possible. Gently tap the seat ring with a rubber mallet or with a block of wood to push the ring into place. Once the Vane Seat Ring is located in the seat recess, the bolts holes can be further aligned. Using self-locking seat adjusting screws, place screws in all the seat vane ring bolt holes. -
Page 22: 30" Thru 72" Installation Of New Vane Seat Ring
b. Approximately 45 minutes for 14” – 24” valves. Alternating Star Pattern for Vane Ring Bolt Tightening Section 5.3.2.1 – 30” thru 72” REMOVAL OF EXISTING SEAT 1. With vane in the closed position, remove seat ring retention screws. 2. Remove the stainless-steel clamp ring segments from the valve. For 30” and larger valves, these are not bonded to the rubber Vane Seat Ring. -
Page 23: Service Details
Ring on vane, aligning the vane ring bolt holes as best as possible. It is recommended to push the rubber Vane Seat Ring into place by hand. 3. Once the rubber seat ring is in place, put the clamp ring segments can be put into place, aligning the bolt holes in the clamp ring with the bolt holes rubber vane ring. -
Page 24: External Obstruction
NOTE: Never attempt to service any BFV operator while the line is following or under pressure. Prior to servicing, properly identify the BFV model and its operator and obtain the correct service information. Also, confirm the opening direction. See SECTION 4.5 – TURNS TO OPERATE determine the number of turns to operate from full open to close that applies to each valve size and/or pressure class. -
Page 25: Vane Level Adjustment
5. If the lever/crosshead interface is damaged, again, there may be some limited movement of the operator before the binding occurs. 6. Check for binding between the thrust cap to the input shaft by loosening the thrust cap (thread off to right). -
Page 26: Vane Level Adjustment Procedure For 48" Thru 72" Bfvs
4. Once the vane is level, turn the Hex Head Bolt inward until it firmly contacts the Lever. 5. Holding the Hex Head Bolt with a wrench (so that it does not move), tighten Lock Nut against the Housing to lock the Hex Head Bolt in place. 6. -
Page 27: Protective Coatings
Section 5.6 – Protective Coatings M&H Valve Co. generally provides one of two coatings for butterfly valves. 1. The primary coating used for M&H BFVs is fusion bond epoxy (FBE). NSF61 and UL certified, meeting the requirements of AWWA C550 “Protective Interior Coatings for Valves and Hydrants”. This coating provides excellent corrosion protection for the valve in both buried and above ground service.
This manual is also suitable for:
1450
