Sea Water 300℃ F51 Metal Seat Pneumatic Ball Valve

Core product positioning

This special ball valve is specially designed for high-temperature seawater working conditions. It features an F51 duplex stainless steel valve body and a high-performance metal sealing system, and is equipped with a pneumatic actuator. It can achieve reliable shut-off and automatic control in 300℃ high-temperature seawater medium, meeting the requirements of corrosion resistance, high temperature resistance and wear resistance under harsh working conditions.

Technical specification parameter table

Core design features

1. F51 duplex stainless steel valve body

Outstanding corrosion resistance: Containing 22-23% chromium, 4.5-6.5% nickel and 2.5-4.5% molybdenum, with a chloride stress corrosion resistance index PREN≥35

Excellent mechanical properties: Tensile strength ≥620 MPa, yield strength ≥450 MPa, which is twice that of standard austenitic stainless steel

Excellent welding performance: Low carbon content controls the precipitation of carbides, and the corrosion resistance of the welding area is stable

2. High-temperature metal sealing system

Multi-layer composite structure

Base layer: F51 duplex stainless steel

Transition layer: Nickel-based alloy buffer layer

Sealing surface: tungsten carbide metal ceramic coating

Surface hardness: HRC 65-70, wear resistance improved by 5-8 times

Thermal stability: After special heat treatment, it maintains dimensional stability and sealing performance at a high temperature of 300℃

3. Specialized pneumatic actuator system

Quick cut-off function: Standard single-acting spring return, automatically returns to a safe position in case of fault

Explosion-proof certification: ATEX and IECEx explosion-proof certifications are optional

Intelligent positioning: Optional positioners and limit switches can be equipped to achieve precise control

Detailed explanation of performance advantages

Corrosion resistance performance

Pitting resistance: The critical point corrosion temperature in 3.5% NaCl solution is ≥35℃

Crevice corrosion resistance: Excellent resistance to chloride ion corrosion, suitable for seawater medium

Anti-erosion and corrosion: The hardened sealing surface effectively resists the erosion of seawater containing sand

High-temperature adaptability

Thermal cycling stability: It still maintains sealing integrity after 1000 thermal cycling tests (-29℃ to 300℃)

Material stability: F51 duplex stainless steel can be used for a long time at 300℃ without the precipitation of harmful phases

Thermal expansion matching: The thermal expansion coefficients of the sealing pair materials have been optimized and matched

Operational reliability

Fast response: Full travel time 1-3 seconds (depending on the caliber)

Low-friction design: Self-lubricating bearings are adopted, reducing operating torque by 30%

Double seal: Main seal (metal)+ emergency grease injection seal

Typical application fields

Marine engineering

Submarine water transmission pipeline control system

Outlet cut-off valve of seawater lift pump

Offshore platform water injection system

Shipbuilding

Control valve for ship ballast water system

Main valve of the cabin cooling water circuit

Key valves of the fire water system

Energy field

High-pressure pipelines for seawater desalination plants

Coastal power station circulating water system

LNG receiving station seawater vaporizer

Special industry

High-temperature seawater cooling in chemical media

Direct cooling of metallurgical equipment with seawater

High-temperature treatment system for environmental protection wastewater

Selection and Configuration Guide

Standard configuration

F51 duplex stainless steel valve body

Metal hard sealing pair

Pneumatic actuator (double-acting)

Anti-static device

Fireproof design

Optional configuration

Actuator options

Single-acting spring return (fault on/off)

Double-acting type

Handwheel mechanism

Attachment options

Solenoid valve

Limit switch

Locator

Supercharger

Special treatment

Inner cavity anti-corrosion coating

Special anti-bioferadhesion coating for seawater

Extended valve cover

Summary

This product, through the perfect combination of material science innovation and sealing technology breakthroughs, provides: For high-temperature seawater working conditions

Super corrosion resistance: F51 duplex stainless steel ensures the long-term durability of the valve body

Outstanding high-temperature performance: The metal sealing system ensures reliable sealing at 300℃

Intelligent automation: Pneumatic execution achieves precise and rapid control

Long service life: The service life is increased by 3 to 5 times under harsh working conditions

Applicable customers: Marine engineering general contractors, shipbuilding enterprises, energy power plants, large chemical enterprises and other industrial users with extremely high requirements for equipment reliability.