Burried Coal Tar Coated U section High Performance Butterfly Valve 60″
Description
Technical Data Sheet
Buried Butterfly Valve – Double Eccentric – Electric Actuator
Product Name: Buried Double Eccentric Butterfly Valve
Model No.: D363H-150LB (Example model for reference)
1. General Information
| Item | Specification |
|---|---|
| Valve Type | Double Eccentric Butterfly Valve (High Performance) |
| Application | Buried Service / Underground Installation |
| Size | 60 inches (DN 1500) |
| Pressure Rating | Class 150LB (200psi) |
| Connection Type | Flanged Ends (ASME B16.47 Series A or B as required) |
| Operation | Electric Actuator with Extended Stem for buried service |
2. Design Standards & Specifications
| Item | Standard |
|---|---|
| Design & Manufacturing | API 609 (Category B), ASME B16.34 |
| Face-to-Face Dimensions | API 609, ASME B16.10 |
| Flange Dimensions | ASME B16.47 (Series A / MSS SP-44 or Series B / API 605) |
| Pressure Testing | API 598 |
| Coating Standard (Buried) | GB/T 17459 or AWWA C210 (Coal Tar Epoxy) |
| Actuator Mounting | ISO 5211 |
3. Main Component Materials
| Part Name | Material Specification |
|---|---|
| Body | Ductile Iron ASTM A536, 60-40-18 / GGG40 |
| Disc | Ductile Iron / Stainless Steel (Optional) |
| Seat (Seal) | EPDM (Ethylene Propylene Diene Monomer) – Suitable for Water/Wastewater |
| Shaft / Stem | Stainless Steel 410 / 17-4PH (Extended Stem for burial) |
| Bushings | Self-Lubricating Bronze / PTFE Lined |
| Body O-Rings | Buna-N / EPDM |
| Boltwork | ASTM A193 B7 / A194 2H (Zinc Plated) |
| External Coating | Coal Tar Epoxy (Thick coating for buried service) |
4. Technical Parameters & Dimensions (Reference)
Coating Specification:
-
Standard: Coal Tar Epoxy conforming to AWWA C210 or GB/T 17459 .
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Color: Black
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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):
| Dimension | Value (Approx.) | Notes |
|---|---|---|
| Face-to-Face (L) | 600 mm – 800 mm | Dependent on API 609 Cat. B design |
| Flange O/D (D) | 1380 mm – 1480 mm | ASME B16.47 Series A |
| Bolt Circle (D1) | 1330 mm – 1430 mm | Dependent on flange standard |
| Number of Bolt Holes | 48 – 56 | / |
| Valve Height (w/o operator) | Custom | Dependent on extended stem length |
| Extended Stem Length | As per burial depth | Typically 2m, 3m, or as specified |
5. Electric Actuator Specifications
| Item | Requirement |
|---|---|
| Actuator Type | Heavy-duty Electric, Quarter-turn (90°) |
| Power Supply | 380V AC / 50Hz / 3-Phase (or as specified) |
| Torque | ≥ 1.5 x Required Valve Break Torque |
| Protection Class | IP68 (Watertight for buried applications) |
| Duty Cycle | S2 / S4 (Intermittent) |
| Motor Insulation | Class H / F |
| Manual Override | Handwheel with declutch mechanism |
| Limit Switch | Fully adjustable (Open/Close) |
| Control Type | On-Off / Modulating (4-20mA) as required |
6. Testing
-
Shell Test: 1.5 x Rated Pressure
-
Seat Test: 1.1 x Rated Pressure (Bi-directional)
-
Leakage Rate: Zero Leakage (API 598)
Technical Notes:
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Double Eccentric Design: The shaft is offset from both the centerline of the disc and the body, reducing seat wear during operation.
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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.
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Buried Coating: The coal tar epoxy provides a durable barrier against galvanic corrosion and soil stress .
