Marine and Sea Water Ball Valves
PBM Marine & Seawater Ball Valves
PBM manufactures reliable, quality ball valves for seawater service. Valves are 1/4” through 10” sizes, full and reduced port, in various alloys compatible with seawater environments.
• Spring-loaded washers create a live-loaded stem assembly for positive sealing.
• Internal design produces a bubble-tight seal.
• Standard bottom-entry stem provides protection against inadvertent stem removal.
• USCG Category A shut off is available.
• Valves are 100% factory-tested to MSS SP-72.
• Shock and vibration testing is available.
• Fire-safe valves per API-607 are available.
BRONZE, ALLOY NO. 836, B62
This material is the ideal choice for all general-purpose (mildly corrosive) applications. It is versatile and well suited for steam, air, fresh water, seawater, oil, and gas lines. 836 bronze is specified to MSS SP-72. Alloy 836 (85-5-5-5) is 85% copper, 5% tin, 5% lead, and 5% zinc. This alloy falls in the “Red and Semi-Red Brasses” group.
BRONZE, ALLOY NO. 922, B61
This material is referred to as Valve, Steam, or Naval Bronze. Alloy 922 (88-6-1.5-4.5) is 88% copper, 6% tin, 1.5% lead, and 4.5% zinc. Alloy 922 falls in the “Tin Bronzes” group. Typical end uses include valves, fittings, and pressure containing parts for use at elevated temperatures.
Monel 400 is used as a shaft (stem) and optional ball material. Monel 400 is 63-70% nickel, 25.5-32.5% copper, 2.5% iron, and 2% manganese. Stem and balls are machined from B164 (barstock) alloy N04400. Larger diameter balls are cast from A494 alloy M35-1.
ALUMINUM BRONZE, ALLOY NO. 953, 954, B148
Alloy 953 (89-1-10) is 89% copper, 1% iron, and 10% aluminum. Typical end uses include pickling baskets, nuts, gears, steel mill slippers, and marine equipment. Alloy 953 is the ideal choice for valve bodies, fittings, and balls used in a seawater environment due to its corrosion resistance in salt water, relatively high tensile and yield strengths, and lower density (lighter weight).
ALUMINUM BRONZE, ALLOY NO. 955, B148
Referred to as Nickel Aluminum Bronze. Alloy 955 (81-4-4-11) is 84% copper, 4% iron, 4% nickel, and 11% aluminum. Alloy 955 has higher tensile and yield strengths than Alloy 953. Typical end uses include valve guides and seats in aircraft engines, corrosion resistance parts, bushings, gears, worms, pickling hooks, and agitators.
316 STAINLESS STEEL
This metal is exceptionally corrosion-resistant to acidic and basic environments. Cast material is made to A351, CF8M and wrought material is made to A479 and S31600.
This versatile material efficiently handles mildly-corrosive media. Cast material is made to A216, WCB and wrought material is made to A105.
PBM also supplies valves fabricated from other metals, including 316L Stainless Steel, Aluminum, Titanium, Alloy 20, Hastelloy, Ni-Cu, Cu-Ni and Inconel. Low and zero ferrite materials are also available. Contact PBM for information on the corrosion resistance of these and other metals and alloys.