1/2″-300LB F53 Close Die Forged Gate Valve

Nominal Size 1/2″ (DN15)
Pressure Rating Class 300 (PN 50)
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 (ASME B16.5 Class 300) as specified
Temperature Range –29°C ~ +250°C (depending on packing)
Suitable Media Seawater, sour gas (H₂S/CO₂), chlorides, acids, high pressure oil & gas, chemical fluids
Flow Direction Bidirectional

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1/2″-300LB F53 Close Die Forged Gate Valve

TECHNICAL DATA SHEET

Product: Close Die Forged Gate Valve
サイズ： 1/2 inch (DN15)
圧力定格: Class 300
本体素材: F53 (Super Duplex Stainless Steel – UNS S32750)
Design: Close Die Forged, Bolted Bonnet, Rising Stem

Basic Specifications

パラメータ	Value
公称サイズ	1/2″ (DN15)
圧力定格	Class 300 (PN 50)
バルブタイプ	Gate Valve – Rising Stem, Solid Wedge
ボディ構造	Close Die Forged, Bolted Bonnet
End Connections	NPT Female (ASME B1.20.1) / Socket Weld (ASME B16.11) / Flanged (ASME B16.5 Class 300) as specified
Temperature Range	–29°C ~ +250°C (depending on packing)
Suitable Media	Seawater, sour gas (H₂S/CO₂), chlorides, acids, high‑pressure oil & gas, chemical fluids
Flow Direction	Bidirectional

Main Features

Close Die Forged Body: Precision forged construction ensures superior mechanical strength, uniform grain structure, and freedom from porosity. Ideal for high‑pressure and cyclic loading applications.
F53 Super Duplex Stainless Steel: Provides exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking (SCC) in chloride‑containing environments. High tensile strength and excellent fatigue resistance.
Rising Stem Design: Stem rises as valve opens, providing visual indication of valve position.
Solid Wedge Gate: Provides positive shut‑off; wedge geometry ensures tight sealing even under thermal cycling and pressure fluctuations.
Bolted Bonnet: Allows easy access for maintenance and packing replacement.
Blowout‑Proof Stem: Stem is designed to prevent ejection under pressure.
Compact Design: Small footprint suitable for tight installations, instrumentation panels, and high‑density piping systems.

Material List (Specified Configuration)

Item	Part	材料
1	体	F53 (Super Duplex Stainless Steel – UNS S32750) – Close Die Forged
2	Bonnet	F53 (Super Duplex Stainless Steel) – Forged
3	Wedge (Gate)	F53 + optional Stellite 21 hardfacing (seat contact surfaces)
4	幹	F53 / F55 (Super Duplex) or Inconel 718
5	Seat Rings	Integral with body (or threaded F53)
6	Packing	PTFE (standard) / Flexible Graphite (high‑temp)
7	Gasket	Spiral Wound, F53 + Graphite / PTFE
8	Bolting	ASTM A193 B8M (316 stainless steel) or A453 Grade 660
9	Handwheel	Stainless Steel / Carbon Steel (coated)

Note: F53 (UNS S32750) offers PREN (Pitting Resistance Equivalent Number) ≥ 40, ideal for offshore and seawater service.

Dimensions & Structural Data

パラメータ	Value
Face‑to‑Face Length (L)	~60 – 70 mm (per ASME B16.10 for Class 300 gate valves)
End Connections	1/2″ NPT Female (ASME B1.20.1) – standard
Overall Height (Open)	~150 – 180 mm
Stem Diameter	~10 – 12 mm
Handwheel Diameter	~70 – 90 mm
Approx. Weight	~1.0 – 1.8 kg (depending on end connection)

Note: Final dimensions to be confirmed by manufacturing drawings.

Design & Testing Standards

Item	標準
Design & Manufacture	API 602 (for small bore forged valves), ASME B16.34
End Connections	ASME B1.20.1 (NPT), ASME B16.11 (SW), ASME B16.5 (Flanged)
Pressure‑Temperature Rating	ASME B16.34
NACE Compliance	NACE MR0175 / ISO 15156 (for sour service)
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)

F53 Super Duplex Stainless Steel Advantages

Property	Benefit
Corrosion Resistance	Excellent resistance to pitting, crevice corrosion, and stress corrosion cracking in chloride and sour environments (PREN ≥ 40)
High Strength	Yield strength > 550 MPa – approximately twice that of 316 stainless steel
Sour Service	NACE MR0175 compliant for H₂S/CO₂ environments
Seawater Service	Ideal for marine and offshore applications due to high resistance to chloride attack
Fatigue Resistance	Superior performance under cyclic pressure and thermal loading

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

Operating Guidelines

Stem Operation: Rising stem provides clear visual indication of open/closed position. Turn handwheel clockwise to close.
Packing Adjustment: If leakage occurs at the stem, lightly tighten the packing gland nuts. Do not overtighten.
流れ方向: Gate valves are bidirectional; no specific flow orientation required.
Material Compatibility: F53 is suitable for seawater, chlorides, and sour gas. Avoid use in reducing acids (e.g., hydrochloric) unless verified.

Typical Applications

Offshore Platforms: Seawater injection systems, topside piping, firewater systems.
Subsea Equipment: Subsea manifolds, Christmas trees, and umbilical termination units.
Oil & Gas: Sour gas production (H₂S/CO₂), wellhead control panels, high‑pressure test manifolds.
Chemical Processing: Chloride‑containing environments, acetic acid, and organic acid service.
Desalination Plants: Reverse osmosis systems, high‑pressure seawater lines.
Marine: Shipboard piping systems, ballast water treatment.

Alternative Configurations

Option	Description
End Connections	NPT Female (standard), Socket Weld, or Flanged (ASME B16.5 Class 300)
Packing Material	PTFE (standard) for general service; Flexible Graphite for high‑temperature up to 250°C
Hardfaced Wedge	Stellite 21 hardfacing for abrasive or high‑cycle service
NACE Compliance	Materials and manufacturing per NACE MR0175 for sour service
Stem Material Upgrade	Inconel 718 for enhanced corrosion resistance and high‑strength applications

Ordering Information

When ordering, please specify:

Size: 1/2″
Pressure Rating: Class 300
Body Material: F53 (Super Duplex Stainless Steel)
End Connections: NPT / Socket Weld / Flanged
Packing Type: PTFE or Graphite
Optional Features: NACE MR0175, hardfaced wedge, certification requirements (e.g., material test reports, PMI, hydrostatic test)

This data sheet reflects the 1/2″ – 300LB F53 Close Die Forged Gate Valve configuration. For specific material grades, end connection details, or additional testing requirements, please contact us with your project specifications.

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