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)
Typ: Globe Valve (Non-Rising Stem / Rotating Stem)
- General Information
|
Item
|
Beschreibung
|
|
Nominal Diameter
|
DN20 (Equivalent to 3/4″)
|
|
Nominal Pressure
|
PN16
|
|
Connection Type
|
NPT Female Thread (ASME B1.20.1)
|
|
Structure Type
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Non-rising stem (rotating stem), Straight-through pattern
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|
Medium Application
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Water, Oil, Steam, Weakly corrosive media
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|
Operating Temperature
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-20°C ~ 180°C (Adjustable based on sealing material)
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- Design Standards & Specifications
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Item
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Standard
|
|
Design & Manufacturing
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GB/T 12235 / JB/T 7749 / API 603
|
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Face-to-Face / End-to-End
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Manufacturer standard (Threaded type)
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|
Thread Standard
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ASME B1.20.1 (NPT)
|
|
Pressure-Temperature Rating
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GB/T 12224 / ASME B16.34
|
|
Inspection & Testing
|
GB/T 13927 / API 598
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- Main Component Materials
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Part Name
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Material Type
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Material Grade / Standard
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Körper
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Stainless Steel
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CF8 (304) or CF8M (316)
|
|
Bonnet
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Stainless Steel
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CF8 (304) or CF8M (316)
|
|
Stängel
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Stainless Steel
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304 or 316 (Anti-galling treated)
|
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Disc / Valve Plate
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Stainless Steel
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304 or 316 + Hard-faced sealing surface
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Seat Sealing Surface
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Stainless Steel / Hard Alloy
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Body integrated Stellite hard-facing or machined directly
|
|
Packing
|
Flexible Graphite / PTFE
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Self-lubricating, high-temperature resistant
|
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Handwheel
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Cast Iron / Malleable Iron
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Plastic-coated surface treatment
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- Technical Parameters & Dimensions (DN20 / PN16 / NPT-F)
4.1 Main Technical Parameters
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Parameter
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Value
|
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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
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3/4″ NPT-F
|
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Thread Length (Minimum)
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Approx. 18 mm (0.75″) standard engagement
|
|
Face-to-Face Length (L)
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Approx. 100 – 120 mm (Manufacturer standard)
|
|
Total Height (H) (Handwheel to bottom)
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Approx. 160 – 170 mm (Non-rising design)
|
|
Handwheel Diameter (W)
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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.*
- Main Features
- 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.
- 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.
- Installation & Selection Notes
- Thread Sealing: Use appropriate thread sealant (PTFE tape or pipe dope) on male pipe threads during installation.
- Flow Direction: Install with flow direction matching the arrow on the body (typically flow below the seat).
- 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.
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