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)

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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)
유형: Globe Valve (Non-Rising Stem / Rotating Stem)

General Information

Item	설명
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)

Design Standards & Specifications

Item	기준
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

Main Component Materials

Part Name	Material Type	Material Grade / Standard
몸	Stainless Steel	CF8 (304) or CF8M (316)
Bonnet	Stainless Steel	CF8 (304) or CF8M (316)
줄기	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

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

4.1 Main Technical Parameters

매개변수	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.*

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.
안정적인 씰링: 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.

보증:

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