AWWA C504 Short Type birectional Double Eccentric Butterfly Valve
product detail
Double Offset Butterfly valves with standard of AWWAC504, short type.
Working Rressure of 125psi 150psi 250psi Temp –10ºC to 120ºC
Size Range: 6"-78"
Main Part Material List
| Body | A536 Gr.65-45-12, A216WCB, SS304, SS316, Duplex SS 2205/2507 | |||||
| Body Seat | SS316L Stainless steel overlay with welding, Duplex SS 2205/2207, Bronze | |||||
| Disc | A536 Gr.65-45-12, A216WCB, SS304, SS316, Duplex SS 2205/2507 | |||||
| Disc Seat Ring | A536 Gr.65-45-12, A216WCB, SS304, SS316, Duplex SS 2205/2507 | |||||
| Retaining Cover | Carbon Steel Plate / SS304/SS3116 | |||||
| Shaft | SS420, SS304, SS316, Duplex F51, F53 | |||||
Feature:
♦Double Eccentric Disc - Low Torque, Low Wear
♦Welded Body Seat Ring Stainless Steel – Reliable and durable performance
♦Robust Buried Service Worm Gear Box, IP 67. IP68 available on request
♦Streamlined low profile Disc – Small Head loss
♦Disc to Shaft Connection – Keyway or Taper Pin
♦T profiled disc seal ring –easy adjustment
♦Multiple shaft O rings – Long life & sealing performance
♦Rapid Disc disengagement from seat
♦Self Lubricating Bronze Bearings maintenance free
♦Body & Disc Coated 250 μm FBE
♦Fasteners Stainless Steel
♦Available with a wide range of gearbox opfions includingburied duty,cap top. handwheel and actuated.
Construction and Dmension List. 
| NPS | e2 inch | e1 inch | M Inch | h1 inch | N Iinch | Ød inch | Ｌ |
| 6 | 6.3” | 7.09” | 3” | 5.9” | 5.66” | 9” | 5” |
| 8 | 7.68” | 8.66” | 3.2” | 7.48” | 6.1” | 9” | 6” |
| 10 | 9.25” | 9.45” | 3.2” | 8.85” | 6.1” | 9” | 8” |
| 12 | 10.63” | 11.42” | 3.2” | 9.84” | 6.22” | 9” | 8” |
| 14 | 11.54” | 12.99” | 4” | 11.2” | 12.6” | 13.1” | 8” |
| 16 | 12.99” | 14.17” | 4” | 12.6” | 12.6” | 13.1” | 8” |
| 18 | 14.17” | 14.96” | 4” | 13.38” | 12.6” | 15.7” | 8” |
| 24 | 17.91” | 18.5” | 5.47” | 16.9” | 15.47” | 15.7” | 8” |
| 36 | 26.18” | 27.17” | 6.77” | 24.2” | 20.5” | 23.62” | 12” |
| 42 | 30.51” | 31.1” | 7.9” | 27.5” | 24.8” | 23.62” | 12” |
| 48 | 35.43” | 36” | 7.9” | 31” | 26.41” | 23.62” | 15” |
| 54 | 39.37” | 40” | 7.9” | 35.2” | 27.8” | 31.49” | 15” |
| 60 | 44.09” | 46” | 9.72” | 40.55” | 29.5” | 31.49” | 18” |
| 72 | 50.39” | 51.5” | 9.72” | 40.15” | 29.5” | 31.49” | 18” |
| 78 | 55.51" | 56" | 10.23" | 48.6" | 43" | 31.49" | 24" |
Function:
The core function of double eccentric butterfly valve is to achieve efficient fluid control and sealing through its unique eccentric structure design. Its core functions include
1. Fluid control
By rotating the butterfly plate 90 °, the fluid can be opened, closed, and flow regulated, suitable for various fluids such as air, water, steam, corrosive media, etc.
2. sealing performance
The valve stem only rotates, and the packing is not easily damaged. With the streamlined butterfly plate design, it can effectively cut off or regulate the flow of medium in the pipeline.
3. structural characteristics
Eccentric design: The axis of the valve stem deviates from the center of the butterfly plate, dispersing the rotation axis of the upper and lower ends of the butterfly plate, reducing the compression wear between the butterfly plate and the valve seat.
Comparison of concentrci butterfly valves: good flow but slow opening and closing speed, while eccentric butterfly valves have greater resistance but more reliable sealing.
Avaiable Standard: AWWAC504, API609, BS5155
Avaiable Face to Face Length: AWWAC504 short /longtype, ISO5755 /EN558 Series 13/14
Size Range: 6"-78" for AWWA standard, DN100-DN2200
Pressure Range； 125psi 150psi 225psi 250psi PN6 PN10 PN16 PN25
Material Avaiable: Ductile Iron, Carbon Steel, Stainless Steel, Duplex Stainlesss Steel
Replaceable Seat Ring: EPDM, NBR, PTFE, VITON
Body Welded Ring: SS304, SS316, Duplex SS, Bronze
UV double Eccentric Butterfly valves with double offset design occurs from the centerline of the disc rotation being horizontally and vertically offset from the stainless steel body seat. Unlike traditional concentric AWWA butterfly valves, the double eccentric design offers a “non-rubbing”resilient seat that releases compression after only a few degrees of opening, which results in a longer lifespan and provides low operating torques. Each valve is equipped with a dual shaft design giving it inherently high flow characterizes over a one piece shaft. This results in considerable savings to the owner by lowering pumping and energy costs over the lifespan of the valve.Importantly, if the resilient seat ever needed adjustment or replacement, it can be achievedwith common tools in the field compared to epoxy filled seats that require special equipment orvulcanized/bonded seats that cannot be field adjusted or replaced.
Water Treatment Plant, Drinkg Water Supply system, Municipal water projects, Pumping construcitons, buried undergroud big pipeline