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DN20-PN16 NRS SS Globe Valve

DN20-PN16 NRS SS Globe Valve

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)

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)
タイプ: 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)

  1. Design Standards & Specifications

Item

標準

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

  1. Main Component Materials

Part Name

Material Type

Material Grade / Standard

Stainless Steel

CF8 (304) or CF8M (316)

Bonnet

Stainless Steel

CF8 (304) or CF8M (316)

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

  1. Technical Parameters & Dimensions (DN20 / PN16 / NPT-F)

4.1 Main Technical Parameters

パラメータ

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.*

  1. Main Features
  1. Non-Rising Stem Design: The stem does not rise during operation, saving installation space and protecting the stem from external damage.
  2. NPT Threaded Connections: Standard tapered pipe threads for leak-proof installation in piping systems.
  3. Corrosion Resistance: Stainless steel construction (CF8/CF8M) provides excellent resistance to corrosion.
  4. 確実なシール: Globe valve design ensures good throttling and shut-off capability with minimal leakage.
  5. Anti-Rotation Design: Stem-to-disc connection prevents rotation during closure, protecting sealing surfaces.
  1. 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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