1/2″-800LB Close Die Forged Globe Valve
Description
API 602 Forged Steel Globe Valve Technical Data Sheet
A105N Material 1/2″ 800LB NPT/Welded Ends
1. General Information
| Item | Specification |
|---|---|
| Valve Type | Forged Steel Globe Valve |
| Design Standard | API 602 / ASME B16.34 / BS 5352 |
| Nominal Size | 1/2 inch (DN15) |
| Pressure Class | Class 800 LB (PN130) |
| Structure Type | OS&Y (Outside Screw and Yoke), Bolted Bonnet |
| Connection Type | NPT Threaded (ASME B1.20.1) or Socket Weld (ASME B16.11) |
| Operation | Handwheel |
| Body Material | ASTM A105N (Forged Carbon Steel, Normalized, suitable for NACE MR0175) |
2. Applicable Standards
| Item | Standard Code |
|---|---|
| Design & Manufacturing | API 602, ASME B16.34, BS 5352 |
| Face-to-Face / End-to-End | Manufacturer Standard / ASME B16.10 |
| Socket Weld Ends | ASME B16.11 |
| Threaded Ends | ASME B1.20.1 (NPT) |
| Test & Inspection | API 598 |
| Pressure-Temperature Rating | ASME B16.34 |
| Valve Marking | MSS SP-25 |
3. Main Design Features
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Body Construction: One-piece die forged body, dense structure, high strength, eliminates casting defects
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Bonnet Connection: Bolted bonnet design with 304/flexible graphite spiral wound gasket sealing
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Disc Design: Renewable disc type, hardfaced seating surface for durability
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Stem Design: Backseat feature allows packing replacement under pressure when valve is fully open
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Operating Characteristics: Disc moves linearly along seat centerline, short stroke, reliable shut-off
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Flow Direction: Flow below seat design, reducing operating torque and protecting packing
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Packing: Flexible graphite packing, low emission design
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Seat: Renewable seat rings or integral hardfacing
4. Main Component Materials (A105N Material)
| Item | Part Name | Material | Standard/Remark |
|---|---|---|---|
| 1 | Body | ASTM A105N | Forged Carbon Steel, Normalized |
| 2 | Bonnet | ASTM A105N | Forged Carbon Steel |
| 3 | Disc | ASTM A276 410 / A105N+STL | 13Cr Stainless Steel or Hardfaced |
| 4 | Seat Ring | ASTM A276 410 / STL Hardfaced | Hardened Stainless Steel, Renewable or Integral |
| 5 | Stem | ASTM A182 F6a (13Cr) | Stainless Steel |
| 6 | Gasket | 304 + Flexible Graphite | Spiral Wound |
| 7 | Packing | Flexible Graphite | Low emission design |
| 8 | Gland Bushing | ASTM A276 410 | Stainless Steel |
| 9 | Gland Flange | ASTM A105 | Carbon Steel |
| 10 | Bonnet Bolt | ASTM A193 Gr.B7 | Alloy Steel |
| 11 | Bonnet Nut | ASTM A194 Gr.2H | Heavy Hex Nut |
| 12 | Eye Bolt | ASTM A193 Gr.B7 | Alloy Steel |
| 13 | Handwheel | ASTM A197 | Malleable Cast Iron |
5. Technical Parameters & Dimensions
5.1 Pressure-Temperature Ratings
| Item | Parameter |
|---|---|
| Nominal Pressure | Class 800 LB (PN130) |
| Shell Test Pressure | 20.0 MPa (Hydrostatic) [API 598] |
| High-Pressure Seat Test Pressure | 14.8 MPa (Hydrostatic) [API 598] |
| Low-Pressure Pneumatic Test Pressure | 0.5 – 0.7 MPa (Air) [API 598] |
| Temperature Range | -29°C ~ 425°C |
| Applicable Media | Water, steam, oil, etc. |
5.2 Dimensions (1/2″ Class 800 NPT/Socket Weld)
| Dimension | Value | Remark |
|---|---|---|
| End-to-End Length (L) | 79 mm | For NPT/SW ends, typical API 602 value |
| Height (H-OPEN) | Approx. 157 mm | Fully open position, reference |
| Handwheel Diameter (W) | 100 mm | Reference |
| Socket Weld Bore (B) | 22.2 mm | Socket weld inner diameter |
| Socket Weld Depth (S) | 10 mm | Minimum socket depth |
| Threaded End | 1/2″ NPT | Per ASME B1.20.1 |
| Weight | Approx. 1.6 kg | Bolted bonnet type, reference |
5.3 End Connection Details
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NPT Threaded Ends: Per ASME B1.20.1, 1/2 inch American Standard Taper Pipe Thread
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Socket Weld Ends (SW): Per ASME B16.11, bore dia 22.2mm, socket depth 10mm
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Flow Direction: Flow direction arrow marking on body (flow below seat)
6. Test & Inspection (API 598)
| Test Item | Test Pressure | Medium | Acceptance Criteria |
|---|---|---|---|
| Shell Test | 20.0 MPa | Water | No visible leakage |
| High-Pressure Seat Test | 14.8 MPa | Water | No visible leakage |
| Low-Pressure Seat Test | 0.5 – 0.7 MPa | Air | No bubbles leakage |
| Test Duration | Per API 598 | — | Hold time conforms to standard |
7. Marking & Supply
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Valve Marking: Per MSS SP-25, nameplate to include nominal size, pressure class, material, heat number, design standard, etc.
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Flow Direction: Flow direction arrow marking on body (flow below seat)
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Cleaning & Protection: Valves internally and externally cleaned, ends covered with protectors, threaded or weld ends coated with rust preventive
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Documentation: Material certificates, pressure test reports, declaration of conformity provided with shipment
