1/2″-2000PSI SS Close Die Forged Gate Valve
Description
TECHNICAL DATA SHEET
Product: Close Die Forged Gate Valve
Size: 1/2 inch (DN15)
Pressure Rating: 2000 PSI
Body Material: Stainless Steel (F304 / F316)
Design: Close Die Forged, Bolted Bonnet, Rising Stem
1. Basic Specifications
| Parameter | Value |
|---|---|
| Nominal Size | 1/2″ (DN15) |
| Pressure Rating | 2000 PSI (~138 bar) at ambient temperature |
| 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 (optional) |
| Temperature Range | –29°C ~ +200°C (with PTFE packing) / Up to +500°C (with graphite packing) |
| Suitable Media | Water, oil, gas, steam, chemical fluids, hydraulic systems |
| 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 applications.
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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.
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Stainless Steel Construction: Excellent corrosion resistance; suitable for a wide range of media including mildly corrosive fluids.
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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.
3. Material List (Specified Configuration)
| Item | Part | Material |
|---|---|---|
| 1 | Body | F304 / F316 Stainless Steel (Close Die Forged) |
| 2 | Bonnet | F304 / F316 Stainless Steel (Forged) |
| 3 | Wedge (Gate) | F304 / F316 Stainless Steel + optional hardfacing (Stellite) |
| 4 | Stem | F304 / F316 Stainless Steel |
| 5 | Seat Rings | Integral with body (or threaded F304/F316) |
| 6 | Packing | PTFE (standard) / Flexible Graphite (high‑temp) |
| 7 | Gasket | Spiral Wound, SS + Graphite / PTFE |
| 8 | Bolting | A193 B8 / B8M (Stainless Steel) |
| 9 | Handwheel | Carbon Steel / Stainless Steel (optional) |
*Note: F316 material is recommended for improved corrosion resistance, especially in chloride-containing environments.*
4. Dimensions & Structural Data
| Parameter | Value |
|---|---|
| Face‑to‑Face Length (L) | ~55 – 65 mm (per MSS SP‑80 for threaded end gate valves) |
| End Connections | 1/2″ NPT Female (ASME B1.20.1) – standard |
| Overall Height (Open) | ~130 – 150 mm |
| Stem Diameter | ~8 – 10 mm |
| Handwheel Diameter | ~60 – 80 mm |
| Approx. Weight | ~0.8 – 1.2 kg |
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) |
| Pressure‑Temperature Rating | ASME B16.34 |
| 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. 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 |
7. 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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Thermal Expansion: When used in high-temperature service, ensure appropriate packing material (graphite) and leave allowance for thermal expansion.
8. Typical Applications
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Instrumentation Panels: Isolation valves for pressure gauges, transmitters, and sample points.
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Hydraulic Systems: High-pressure hydraulic circuits.
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Steam Service: With graphite packing, suitable for saturated steam lines.
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Chemical Injection Skids: Corrosion‑resistant stainless steel for chemical dosing.
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Oil & Gas: High-pressure test manifolds, wellhead control panels.
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General Industrial: Water, air, and oil service up to 2000 PSI.
9. Alternative Configurations
| Option | Description |
|---|---|
| Packing Material | PTFE (standard) for general service; Flexible Graphite for high‑temperature up to 500°C |
| End Connections | NPT Female (standard), Socket Weld, or Flanged (ASME B16.5 Class 1500) |
| Hardfaced Wedge | Stellite 21 hardfacing for abrasive or high‑temperature service |
| NACE Compliance | Materials and manufacturing per NACE MR0175 for sour service |
10. Ordering Information
When ordering, please specify:
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Size: 1/2″
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Pressure Rating: 2000 PSI
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Body Material: Stainless Steel (F304 or F316)
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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
This data sheet reflects the 1/2″ – 2000PSI Stainless Steel Close Die Forged Gate Valveconfiguration. For specific material grades, end connection details, or additional testing requirements, please contact us with your project specifications.
