Penerangan
Technical Data Sheet
Buried Butterfly Valve – Double Eccentric – Electric Actuator
Product Name: Buried Double Eccentric Butterfly Valve
- General Information
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Item
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Spesifikasi
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Jenis Injap
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Double Eccentric Butterfly Valve (High Performance)
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Permohonan
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Buried Service / Underground Installation
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Saiz
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60 inches (DN 1500)
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Penilaian Tekanan
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Class 150LB (200psi)
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Connection Type
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Flanged Ends (ASME B16.47 Series A or B as required)
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Operasi
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Electric Actuator with Extended Stem for buried service
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- Design Standards & Specifications
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Item
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Standard
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Design & Manufacturing
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API 609 (Category B), ASME B16.34
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Face-to-Face Dimensions
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API 609, ASME B16.10
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Flange Dimensions
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ASME B16.47 (Series A / MSS SP-44 or Series B / API 605)
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Pressure Testing
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API 598
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Coating Standard (Buried)
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GB/T 17459 or AWWA C210 (Coal Tar Epoxy)
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Actuator Mounting
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ISO 5211
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- Main Component Materials
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Part Name
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Material Specification
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Badan
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Ductile Iron ASTM A536, 60-40-18 / GGG40
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Cakera
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Ductile Iron / Stainless Steel (Optional)
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Seat (Seal)
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EPDM (Ethylene Propylene Diene Monomer) – Suitable for Water/Wastewater
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Shaft / Stem
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Stainless Steel 410 / 17-4PH (Extended Stem for burial)
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Bushings
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Self-Lubricating Bronze / PTFE Lined
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Body O-Rings
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Buna-N / EPDM
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Boltwork
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ASTM A193 B7 / A194 2H (Zinc Plated)
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External Coating
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Coal Tar Epoxy (Thick coating for buried service)
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- Technical Parameters & Dimensions (Reference)
Coating Specification:
- Standard: Coal Tar Epoxy conforming to AWWA C210 or GB/T 17459 .
- Color: Black
- Dry Film Thickness: > 300 Microns (or as required for buried service)
- Feature: High electrical resistance, anti-corrosive, and resistant to soil chemicals.
Valve Dimensions (Approximate values for 60″ / DN1500):
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Dimension
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Value (Approx.)
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Nota
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Face-to-Face (L)
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600 mm – 800 mm
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Dependent on API 609 Cat. B design
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Flange O/D (D)
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1380 mm – 1480 mm
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ASME B16.47 Series A
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Bolt Circle (D1)
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1330 mm – 1430 mm
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Dependent on flange standard
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Number of Bolt Holes
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48 – 56
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/
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Valve Height (w/o operator)
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Custom
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Dependent on extended stem length
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Extended Stem Length
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As per burial depth
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Typically 2m, 3m, or as specified
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- Electric Actuator Specifications
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Item
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Requirement
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Actuator Type
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Heavy-duty Electric, Quarter-turn (90°)
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Power Supply
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380V AC / 50Hz / 3-Phase (or as specified)
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Torque
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≥ 1.5 x Required Valve Break Torque
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Protection Class
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IP68 (Watertight for buried applications)
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Duty Cycle
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S2 / S4 (Intermittent)
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Motor Insulation
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Class H / F
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Manual Override
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Handwheel with declutch mechanism
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Limit Switch
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Fully adjustable (Open/Close)
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Control Type
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On-Off / Modulating (4-20mA) as required
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- Menguji
- Shell Test: 1.5 x Rated Pressure
- Seat Test: 1.1 x Rated Pressure (Bi-directional)
- Leakage Rate: Zero Leakage (API 598)
Technical Notes:
- Double Eccentric Design: The shaft is offset from both the centerline of the disc and the body, reducing seat wear during operation.
- Extended Stem: Allows the actuator to be positioned above ground while the valve body remains buried. The stem extension is sealed to prevent ingress of moisture and soil.
- Buried Coating: The coal tar epoxy provides a durable barrier against galvanic corrosion and soil stress .
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