2"300LB C95800 Gate Valve

C95800 Nickel Aluminum Bronze Material:The valve body is precision cast from ASTM B148 C95800 nickel aluminum bronze (Cu9Ni6Al4Fe4Mn), with chemical composition of 8.5–9.5% nickel, 4.0–5.0% aluminum, 4.0–5.0% iron and 0.8–1.5% manganese. It delivers outstanding seawater corrosion resistance, superior resistance to cavitation and erosion corrosion, and effectively inhibits marine organism adhesion and fouling, making it suitable for long-term seawater immersion and medium-to-high pressure marine environments.

Elastic Wedge Disc Structure:Adopting a wedge-shaped elastic wedge disc design, the disc is slotted at the middle or constructed as an integral elastic component. When closed, slight deformation occurs under compression from valve seats to automatically compensate for angular deviation of sealing surfaces, ensuring uniform surface contact and reliable bidirectional tight shutoff for medium-to-high pressure service.

Full Bore Straight Flow Passage:When fully open, the wedge disc retracts into the bonnet to form an unobstructed straight flow channel with an extremely low flow resistance coefficient (ζ ≈ 0.1–0.3) and negligible pressure drop. It is designed as an on-off isolation valve and not applicable for throttling or flow regulation.

Medium-to-High Pressure Flanged Connection:Both ends of the valve body feature RF (Raised Face) flanges conforming to ASME B16.5 Class 300 standards. For 2-inch Class 300 flanges: outer diameter 165 mm, bolt circle diameter 127.0 mm, 8 off M16 bolts and flange thickness 22.3 mm, guaranteeing connection integrity and tightness under medium-to-high pressure up to 5.1 MPa.

Rising Stem Position Indicator:The exposed stem is fitted with a travel scale or opening indicator to visually display valve open/closed positions, facilitating on-site operation, remote monitoring and preventing misoperation.

Low Operating Torque:The stem nut is manufactured from friction-reducing copper alloy or self-lubricating composite material, paired with precision machined threads to minimize lifting friction. Manual operation for the 2-inch size is effortless, and compact actuators can be optionally equipped.

Fire-Safe Construction:Compliant with API 607 standard. Graphite packing and metallic sealing components retain sealing performance during fire incidents to prevent medium leakage.

Anti-Blowout Stem Design:The stem features an integral forged top-entry structure equipped with anti-blowout shoulders and sealing rings. Even if the packing gland loosens accidentally, the stem will be retained by the bonnet to secure operational safety.

Graphite Packing Sealing:The stuffing box adopts flexible graphite braided packing or graphite ring combinations, covering a wide temperature range of -29℃ to +500℃. It remains flexible at low temperatures with excellent self-lubrication, delivering long-term reliable dynamic sealing for the valve stem.

Anti-Marine-Fouling Design:A dense passive oxide film forms naturally on the surface of C95800 alloy to repel barnacles, algae and other marine organisms. The streamlined wedge disc minimizes adhesion points and cuts down maintenance frequency.

Vessel Seawater Systems:Serves as isolation equipment for 2-inch medium-to-high pressure pipelines in ship ballast water, bilge water, fire seawater and cooling seawater systems. The C95800 alloy offers seawater corrosion resistance and anti-biofouling performance to meet requirements for marine classification society certification.

Offshore Platform Engineering:Used for 2-inch medium-to-high pressure pipeline isolation in seawater lift, cooling, fire protection and utility systems of offshore oil platforms, FPSOs and drilling rigs, resisting dual corrosion from marine atmosphere and full seawater immersion.

Seawater Desalination Plants:Installed at inlet/outlet of high-pressure pumps and flow lines of energy recovery devices in RO (Reverse Osmosis), MSF (Multi-Stage Flash) and MED (Multi-Effect Distillation) desalination systems. It withstands high-salinity seawater and chemical cleaning media, with Class 300 rating satisfying high-pressure membrane desalination demands.

Marine Chemical Industry:Applied for isolation of 2-inch brine and concentrated seawater pipelines in seawater salt production, bromine extraction, magnesium extraction and other chemical processes, resistant to corrosion from high-concentration salt solutions under medium-to-high pressure.

Subsea Equipment:Deployed on 2-inch medium-to-high pressure control pipelines of subsea valve manifolds, subsea pipe assemblies and ROV operation panels. C95800 alloy withstands hydrostatic seawater corrosion and satisfies deep-sea service conditions.

General Industrial Service:Suitable for isolation and shutoff of 2-inch medium-to-high pressure pipelines carrying corrosive media including seawater, brackish water and salt solutions, especially for marine and severely corrosive working conditions.

Superior Medium-to-High Pressure Seawater Corrosion Resistance:The corrosion rate of C95800 nickel aluminum bronze in seawater is merely 1/50 of carbon steel and 1/10 of brass. A dense protective Al₂O₃·CuO film forms on its surface, enabling rust-free long-term immersion under Class 300 medium-to-high pressure with a service life of over 20 years.

Excellent Anti-Biofouling Performance:Nickel aluminum bronze naturally repels marine organism adhesion, preventing barnacle and algae blockage of disc grooves. Maintenance cycles are extended by 3–5 times, reducing dry-docking frequency and maintenance costs for vessels, ideal for permanently submerged offshore platforms.

Reliable Elastic Wedge Disc Sealing:The self-compensating wedge elastic disc eliminates angular deviation of sealing surfaces with consistent bidirectional sealing performance, achieving zero leakage under Class 300 pressure to guarantee safety during pipeline isolation and maintenance.

Electrochemical Compatibility:It features a low galvanic potential difference when paired with steel hulls and stainless steel piping, offering good compatibility with cathodic protection systems to avoid galvanic corrosion, improve overall system reliability and lower anti-corrosion engineering costs.

Compact & Lightweight for Easy Installation:The 2-inch valve weighs only 8–12 kg with a face-to-face length of approximately 216 mm, allowing flexible installation in space-limited areas such as ship compartments and platform modules, cutting pipe support costs by over 30%.

Effortless & Flexible Operation:Thanks to friction-reducing stem nut design, the operating torque for the 2-inch model is below 15 N·m for single-hand opening and closing. Compact pneumatic or electric actuators can be fitted to realize remote automatic control.

Support for Marine Classification Society Certification:Type approvals from ABS, DNV, BV, CCS and other marine classification societies are available upon request, complying with vessel and offshore engineering class requirements, shortening owner acceptance cycles and boosting project competitiveness.