Views: 0 Author: J-VALVES Publish Time: 2026-08-29 Origin: Site
For marine vessels, offshore platforms and seawater process piping systems, conventional carbon steel or stainless‑steel valves easily suffer pitting corrosion and erosion under continuous seawater exposure. Selecting corrosion‑resistant valve material is critical to long‑term pipeline reliability.
The 2‑inch Class 300LB C95800 lug type dual‑plate wafer check valve is cast from UNS C95800 nickel‑aluminum bronze alloy. Designed and manufactured per API 594 and ASME B16.34 international standards, this spring‑loaded dual‑disc check valve prevents reverse flow and protects pumps, instruments and downstream piping from reverse‑flow damage.
Compared with ordinary wafer check valves, lug‑style bodies feature tapped bolt holes for single‑side flange removal without full pipeline disassembly. The spring‑assisted dual‑disc design delivers fast response with low water‑hammer effect. Compact and lightweight, it saves installation footprint for marine and offshore corrosive service conditions.
ASTM B148 UNS C95800 nickel‑aluminum bronze is a well‑recognized high‑performance copper alloy for marine service. Alloyed with aluminum, nickel and iron, it outperforms brass and general bronze in seawater and brine environments.
1. Superior seawater corrosion resistance: Excellent resistance to seawater pitting, crevice corrosion and cavitation erosion. Widely adopted for ship ballast water, seawater cooling loops and offshore process lines to minimize corrosion‑related leakage risk.
2. High mechanical strength for Class 300 service: C95800 offers good tensile and impact strength. The valve body resists deformation and cracking under ANSI Class 300 high‑pressure operating conditions.
3. Erosion & cavitation resistance: Handles high‑velocity media with minor particle content, extends service life versus common stainless‑steel alternatives and cuts maintenance frequency.
4. Traceable material compliance: Body casting is permanently marked with material grade and pressure class. Material test reports are available for marine and offshore project documentation requirements.
1. Lug‑type body with tapped holes: Machined threaded lug holes allow installation between ANSI flanges. One‑side flange can be detached without valve falling off, facilitating partial pipeline maintenance, a key advantage over standard wafer‑only check valves.
2. Spring‑loaded dual‑disc mechanism: Forward fluid pushes two discs open for flow passage. Once flow reverses, spring force closes discs rapidly to block backflow. Fast actuation reduces water‑hammer shock. Works for both horizontal and vertical pipe orientations.
3. Compact wafer profile: Short face‑to‑face dimension and light weight. Saves space and reduces piping load compared with traditional swing check valves.
4. International standard compliance: Design standard API 594; pressure‑temperature rating ASME B16.34; flange interface ASME B16.5; inspection & testing according to API 598 for global project acceptance.
Size：2 inch (DN50)
Pressure Class：Class 300LB
Body Material：UNS C95800 Nickel‑Aluminum Bronze
Disc Material：C95800
Spring：Corrosion‑resistant alloy spring
Connection：Lug‑style wafer
Standards：API 594, ASME B16.34, API 598
Service Media：Seawater, brine, mild corrosive industrial fluids
Operating Temperature：‑29℃ ~ +200℃
✅ Shipbuilding: Ballast water system, seawater cooling circuit, marine fire‑fighting seawater piping
✅ Off‑shore oil & gas: Offshore platform seawater process and circulating lines
✅ Ocean engineering: Coastal seawater desalination, seawater intake projects
✅ Industrial anti‑corrosion: Brine handling and mildly corrosive process loops, back‑flow protection for pumps.
C95800 bronze valves serve demanding marine environments. Always verify permanent body marking of UNS C95800 and request material test reports. Do not fit Class 150 rated bodies for Class 300LB working conditions. Lug thread dimensions must match ASME B16.5 Class 300 flange bolt specifications to guarantee installation safety. Select corrosion‑resistant springs for seawater duty to avoid spring failure and non‑return malfunction.
The 2" 300LB C95800 lug‑type dual‑plate wafer check valve combines the proven seawater‑resistant performance of C95800 nickel‑aluminum bronze with compact, maintainable lug‑style dual‑disc construction. Built to API and ASME international standards, it is purpose‑engineered for back‑flow prevention in high‑corrosion, high‑pressure marine and offshore piping systems. If you need reliable check‑valve solutions for seawater‑exposed projects, this lug dual‑plate wafer check valve deserves your careful evaluation.
CTA：Contact our engineering team if you need CAD drawings, material certificates or quotation for C95800 lug type dual plate wafer check valves.
