1.5" 300LB C95800 Gate Valve

Nickel‑aluminum bronze C95800 material: The valve body is precision‑cast from ASTM B148 C95800 nickel‑aluminum bronze. It delivers excellent seawater corrosion resistance, outstanding resistance to seawater erosion‑corrosion and cavitation erosion, and superior anti‑marine‑biofouling performance, which reduces marine organism fouling and maintenance‑cleaning work.

Small‑bore medium‑high‑pressure specification: Nominal size 1‑1/2 inch (DN40) combined with Class 300 (PN50) medium‑high‑pressure rating meets shut‑off requirements for small‑flow medium‑high‑pressure systems, and is suitable for high‑pressure shipboard systems and critical nodes of offshore engineering.

OS&Y (Outside Screw and Yoke) stem design: Stem threads are located outside the valve body and fully isolated from process media to avoid seawater corrosion. The yoke supports the stem nut for stable operating torque. Stem travel is visually observable for easy identification of valve open/closed positions, complying with API 600 requirements.

Wedge‑type flexible gate: The gate adopts an integral wedge‑flexible design with precisely machined wedge angles. Reliable sealing is achieved by mating wedge surfaces of gate and valve seat. The flexible structure compensates thermal deformation induced by temperature variation to sustain sealing performance. The aluminum‑bronze gate features seawater corrosion resistance and material compatibility with the valve body to prevent galvanic corrosion.

Flanged or threaded end connections: RF (Raised Face) flanged or NPT/BSP threaded ends conform to ASME B16.5 / ASME B1.20.1 standards for easy integration into existing piping systems. Flanged ends facilitate installation and disassembly; threaded ends apply to space‑restricted locations.

Pressure‑seal bonnet (high‑pressure version): For Class 300 medium‑high‑pressure service, either pressure‑self‑sealing bonnet or bolted bonnet is adopted to guarantee sealing reliability under medium‑high‑pressure operating conditions.

Fire‑safe design: Compliant with API 607 standard. Metal‑to‑metal sealing configuration retains sealing integrity under fire scenarios and prevents secondary hazards caused by media leakage.

Stem blow‑out prevention design: Top‑mounted anti‑blow‑out stem structure with shoulder and retaining ring prevents stem ejection under abnormal internal pressure, ensuring operational safety.

Back‑seat sealing design: When the valve is fully open, a metal seal forms between stem and bonnet, permitting on‑line packing replacement without system depressurization and minimizing system downtime.

Seawater‑resistant packing: Flexible graphite or special seawater‑resistant packing is applied, offering salt‑spray corrosion resistance and excellent sealing performance for long‑term exposure in offshore environments.

Shipboard seawater systems: Provide reliable shut‑off for seawater cooling, ballast water, fire water, bilge water, deck washing and sanitary seawater systems, resisting long‑term seawater corrosion and erosion.

Offshore platforms: Deployed in seawater lift, cooling, fire‑protection and utility systems for offshore oil platforms, FPSOs and drilling vessels, resisting marine‑atmosphere and seawater‑splash corrosion.

Seawater desalination plants: Applied for seawater intake, pre‑treatment and product‑water regulation in RO (Reverse Osmosis), MSF (Multi‑Stage Flash) and MED (Multi‑Effect Distillation) desalination systems.

Port & terminal facilities: Control seawater and fresh‑water circuits for port cargo handling, ship water supply, fire‑protection and ballast‑water systems.

Marine aquaculture & fishery: Used for seawater supply and drainage systems of deep‑sea aquaculture cages and fishery processing facilities.

Subsea pipeline systems: Perform shut‑off and regulation for subsea water‑transport and water‑injection pipelines under high‑pressure corrosive seawater conditions.

Chemical & marine chemical industry: Serve seawater‑brine handling systems for sea‑salt production, bromine extraction from seawater, chlor‑alkali processes and marine chemical plants.

General marine service: Realize positive isolation for aggressive corrosive media such as seawater, brackish water and high‑salinity groundwater as well as marine atmosphere, acting as key control equipment for offshore environments.

Excellent cavitation‑erosion resistance: Aluminum‑bronze alloy features high hardness and good toughness, resisting high‑velocity seawater erosion and cavitation damage for severe service such as pump outlets and throttling locations.

Strong anti‑biofouling performance: Copper‑base alloy inherently inhibits marine organism attachment, mitigating biofouling, cutting maintenance‑cleaning frequency and energy consumption, and delivering particular benefits for seawater cooling circuits.

Safe and reliable operation: Visible stem position via OS&Y layout; anti‑blow‑out and back‑seat sealing structures secure operation and maintenance safety; seawater‑resistant packing maintains performance under long‑term environmental exposure.

Convenient installation & maintenance: Flanged or threaded ends simplify installation and overhaul. Compact construction reduces piping support costs. Aluminum‑bronze material is weldable and repairable for favorable serviceability.

Easy automation integration: ISO 5211 top mounting flange adapts to compact pneumatic and electric actuators to facilitate remote control and automated operation on offshore platforms.

Wide application coverage: Multiple aluminum‑bronze grades, end‑connection options and surface treatments are available, covering diversified offshore service from deep‑sea subsea to above‑water decks, covering static seawater and high‑velocity erosion scenarios.

International‑standard compliance: Designed and manufactured in strict accordance with API 600, ASME, MSS, BS and other international standards to satisfy procurement requirements of global marine projects. Complete documentation including EN 10204 3.1 / 3.2 material certificates, classification society approvals and test reports are supplied.