1/2″-300LB F53 Close Die Forged Gate Valve
Description
TECHNICAL DATA SHEET
Product: Close Die Forged Gate Valve
Size: 1/2 inch (DN15)
Pressure Rating: Class 300
Body Material: F53 (Super Duplex Stainless Steel – UNS S32750)
Design: Close Die Forged, Bolted Bonnet, Rising Stem
1. Basic Specifications
| Parameter | Value |
|---|---|
| Nominal Size | 1/2″ (DN15) |
| Pressure Rating | Class 300 (PN 50) |
| Valve Type | Gate Valve – Rising Stem, Solid Wedge |
| Body Construction | Close Die Forged, Bolted Bonnet |
| End Connections | NPT Female (ASME B1.20.1) / Socket Weld (ASME B16.11) / Flanged (ASME B16.5 Class 300) as specified |
| Temperature Range | –29°C ~ +250°C (depending on packing) |
| Suitable Media | Seawater, sour gas (H₂S/CO₂), chlorides, acids, high‑pressure oil & gas, chemical fluids |
| Flow Direction | Bidirectional |
2. Main Features
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Close Die Forged Body: Precision forged construction ensures superior mechanical strength, uniform grain structure, and freedom from porosity. Ideal for high‑pressure and cyclic loading applications.
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F53 Super Duplex Stainless Steel: Provides exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking (SCC) in chloride‑containing environments. High tensile strength and excellent fatigue resistance.
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Rising Stem Design: Stem rises as valve opens, providing visual indication of valve position.
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Solid Wedge Gate: Provides positive shut‑off; wedge geometry ensures tight sealing even under thermal cycling and pressure fluctuations.
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Bolted Bonnet: Allows easy access for maintenance and packing replacement.
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Blowout‑Proof Stem: Stem is designed to prevent ejection under pressure.
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Compact Design: Small footprint suitable for tight installations, instrumentation panels, and high‑density piping systems.
3. Material List (Specified Configuration)
| Item | Part | Material |
|---|---|---|
| 1 | Body | F53 (Super Duplex Stainless Steel – UNS S32750) – Close Die Forged |
| 2 | Bonnet | F53 (Super Duplex Stainless Steel) – Forged |
| 3 | Wedge (Gate) | F53 + optional Stellite 21 hardfacing (seat contact surfaces) |
| 4 | Stem | F53 / F55 (Super Duplex) or Inconel 718 |
| 5 | Seat Rings | Integral with body (or threaded F53) |
| 6 | Packing | PTFE (standard) / Flexible Graphite (high‑temp) |
| 7 | Gasket | Spiral Wound, F53 + Graphite / PTFE |
| 8 | Bolting | ASTM A193 B8M (316 stainless steel) or A453 Grade 660 |
| 9 | Handwheel | Stainless Steel / Carbon Steel (coated) |
Note: F53 (UNS S32750) offers PREN (Pitting Resistance Equivalent Number) ≥ 40, ideal for offshore and seawater service.
4. Dimensions & Structural Data
| Parameter | Value |
|---|---|
| Face‑to‑Face Length (L) | ~60 – 70 mm (per ASME B16.10 for Class 300 gate valves) |
| End Connections | 1/2″ NPT Female (ASME B1.20.1) – standard |
| Overall Height (Open) | ~150 – 180 mm |
| Stem Diameter | ~10 – 12 mm |
| Handwheel Diameter | ~70 – 90 mm |
| Approx. Weight | ~1.0 – 1.8 kg (depending on end connection) |
Note: Final dimensions to be confirmed by manufacturing drawings.
5. Design & Testing Standards
| Item | Standard |
|---|---|
| Design & Manufacture | API 602 (for small bore forged valves), ASME B16.34 |
| End Connections | ASME B1.20.1 (NPT), ASME B16.11 (SW), ASME B16.5 (Flanged) |
| Pressure‑Temperature Rating | ASME B16.34 |
| NACE Compliance | NACE MR0175 / ISO 15156 (for sour service) |
| Pressure Testing | API 598 or ISO 5208 |
| Low‑Pressure Air Test | 0.6 MPa (6 bar) – no visible leakage |
| High‑Pressure Hydrostatic Test | 1.5 × rated pressure (body), 1.1 × rated pressure (seat) |
6. F53 Super Duplex Stainless Steel Advantages
| Property | Benefit |
|---|---|
| Corrosion Resistance | Excellent resistance to pitting, crevice corrosion, and stress corrosion cracking in chloride and sour environments (PREN ≥ 40) |
| High Strength | Yield strength > 550 MPa – approximately twice that of 316 stainless steel |
| Sour Service | NACE MR0175 compliant for H₂S/CO₂ environments |
| Seawater Service | Ideal for marine and offshore applications due to high resistance to chloride attack |
| Fatigue Resistance | Superior performance under cyclic pressure and thermal loading |
7. Close Die Forging Advantages
| Feature | Benefit |
|---|---|
| Grain Structure | Uniform and continuous grain flow follows part contours, increasing strength |
| Density | No porosity or voids common in castings |
| Mechanical Properties | Higher tensile strength and impact resistance compared to cast equivalents |
| Pressure Integrity | Superior performance under high‑pressure and cyclic loading |
| Surface Finish | Smooth surface reduces stress concentration points |
8. Operating Guidelines
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Stem Operation: Rising stem provides clear visual indication of open/closed position. Turn handwheel clockwise to close.
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Packing Adjustment: If leakage occurs at the stem, lightly tighten the packing gland nuts. Do not overtighten.
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Flow Direction: Gate valves are bidirectional; no specific flow orientation required.
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Material Compatibility: F53 is suitable for seawater, chlorides, and sour gas. Avoid use in reducing acids (e.g., hydrochloric) unless verified.
9. Typical Applications
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Offshore Platforms: Seawater injection systems, topside piping, firewater systems.
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Subsea Equipment: Subsea manifolds, Christmas trees, and umbilical termination units.
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Oil & Gas: Sour gas production (H₂S/CO₂), wellhead control panels, high‑pressure test manifolds.
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Chemical Processing: Chloride‑containing environments, acetic acid, and organic acid service.
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Desalination Plants: Reverse osmosis systems, high‑pressure seawater lines.
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Marine: Shipboard piping systems, ballast water treatment.
10. Alternative Configurations
| Option | Description |
|---|---|
| End Connections | NPT Female (standard), Socket Weld, or Flanged (ASME B16.5 Class 300) |
| Packing Material | PTFE (standard) for general service; Flexible Graphite for high‑temperature up to 250°C |
| Hardfaced Wedge | Stellite 21 hardfacing for abrasive or high‑cycle service |
| NACE Compliance | Materials and manufacturing per NACE MR0175 for sour service |
| Stem Material Upgrade | Inconel 718 for enhanced corrosion resistance and high‑strength applications |
11. Ordering Information
When ordering, please specify:
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Size: 1/2″
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Pressure Rating: Class 300
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Body Material: F53 (Super Duplex Stainless Steel)
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End Connections: NPT / Socket Weld / Flanged
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Packing Type: PTFE or Graphite
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Optional Features: NACE MR0175, hardfaced wedge, certification requirements (e.g., material test reports, PMI, hydrostatic test)
This data sheet reflects the 1/2″ – 300LB F53 Close Die Forged Gate Valve configuration. For specific material grades, end connection details, or additional testing requirements, please contact us with your project specifications.
