DN20-PN16 NRS SS Globe Valve
Description
Technical Data Sheet
Non-Rising Stem Stainless Steel Globe Valve
Product Name: Non-Rising Stem Stainless Steel Globe Valve
Model / Size: DN20, PN16
Connection: NPT-F (Female Thread)
Type: Globe Valve (Non-Rising Stem / Rotating Stem)
1. General Information
| Item | Description |
|---|---|
| Nominal Diameter | DN20 (Equivalent to 3/4″) |
| Nominal Pressure | PN16 |
| Connection Type | NPT Female Thread (ASME B1.20.1) |
| Structure Type | Non-rising stem (rotating stem), Straight-through pattern |
| Medium Application | Water, Oil, Steam, Weakly corrosive media |
| Operating Temperature | -20°C ~ 180°C (Adjustable based on sealing material) |
2. Design Standards & Specifications
| Item | Standard |
|---|---|
| Design & Manufacturing | GB/T 12235 / JB/T 7749 / API 603 |
| Face-to-Face / End-to-End | Manufacturer standard (Threaded type) |
| Thread Standard | ASME B1.20.1 (NPT) |
| Pressure-Temperature Rating | GB/T 12224 / ASME B16.34 |
| Inspection & Testing | GB/T 13927 / API 598 |
3. Main Component Materials
| Part Name | Material Type | Material Grade / Standard |
|---|---|---|
| Body | Stainless Steel | CF8 (304) or CF8M (316) |
| Bonnet | Stainless Steel | CF8 (304) or CF8M (316) |
| Stem | Stainless Steel | 304 or 316 (Anti-galling treated) |
| Disc / Valve Plate | Stainless Steel | 304 or 316 + Hard-faced sealing surface |
| Seat Sealing Surface | Stainless Steel / Hard Alloy | Body integrated Stellite hard-facing or machined directly |
| Packing | Flexible Graphite / PTFE | Self-lubricating, high-temperature resistant |
| Handwheel | Cast Iron / Malleable Iron | Plastic-coated surface treatment |
4. Technical Parameters & Dimensions (DN20 / PN16 / NPT-F)
4.1 Main Technical Parameters
| Parameter | Value |
|---|---|
| Nominal Pressure | 1.6 MPa (230 psi) |
| Shell Hydrostatic Test | 2.4 MPa (350 psi) |
| Seat Seal Test | 1.76 MPa (255 psi) |
| Applicable Temperature | ≤ 200°C (Water, Oil) |
| Flow Characteristic | Approx. Equal Percentage |
4.2 Dimensional Data
| Item | Dimension (mm / inch) |
|---|---|
| Thread Type | NPT Female (ASME B1.20.1) |
| Thread Size | 3/4″ NPT-F |
| Thread Length (Minimum) | Approx. 18 mm (0.75″) standard engagement |
| Face-to-Face Length (L) | Approx. 100 – 120 mm (Manufacturer standard) |
| Total Height (H) (Handwheel to bottom) | Approx. 160 – 170 mm (Non-rising design) |
| Handwheel Diameter (W) | 100 mm (4″) |
*Note: Threaded end dimensions conform to ASME B1.20.1. Face-to-face dimensions may vary by manufacturer. Please verify before installation.*
5. Main Features
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Non-Rising Stem Design: The stem does not rise during operation, saving installation space and protecting the stem from external damage.
-
NPT Threaded Connections: Standard tapered pipe threads for leak-proof installation in piping systems.
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Corrosion Resistance: Stainless steel construction (CF8/CF8M) provides excellent resistance to corrosion.
-
Reliable Sealing: Globe valve design ensures good throttling and shut-off capability with minimal leakage.
-
Anti-Rotation Design: Stem-to-disc connection prevents rotation during closure, protecting sealing surfaces.
6. Installation & Selection Notes
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Thread Sealing: Use appropriate thread sealant (PTFE tape or pipe dope) on male pipe threads during installation.
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Flow Direction: Install with flow direction matching the arrow on the body (typically flow below the seat).
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Wrench Flats: The valve body is equipped with wrench flats for proper installation. Do not use the handwheel as a lever for tightening.
-
Special Conditions: For high-temperature steam or thermal oil applications, verify packing material suitability.
Remark: This data sheet applies to standard PN16 threaded end valves. For special working conditions, please consult the manufacturer.
