Outside Screw and Yoke, Flanged End
Lunkenheimer Gate Valves
Fig 1430 IBBM
Fig 1430-GO-LF
Fig 1578 iron
Fig 1578N-4 MO stainless trim
This series of bolted bonnet Lunkenheimer gate valves are outside screw and yoke type with flanged ends. Two body-trim combinations: All-iron or iron body with bronze mountings (IBBM), the latter recommended for general use on steam, water, air, oil, and gas lines.
Body to Bonnet
Close-grained cast iron or a corrosion-resistant 3% nickel iron alloy. Bolted bonnets. Flanged ends make valves easy to install or remove in general use or corrosive service. Two supporting webs between pipe flanges and body flange help strengthen valve against pipe line strain.
Stem
Outside screw and yoke design places stem outside bonnet away from corrosive fluids. Acme standard threads with long engagement in yoke bushing.
For all-iron valves: Steel. Chemically treated with phosphate to inhibit rust.
For IBBM valves: Manganese bronze in 2″ – 12″ sizes, Stemalloy in larger sizes.
Resistant to wear, corrosion and embrittlement.
Disc
Solid Iron Discs are bronze faced for excellent wear and sealability.
For all-iron valves: Iron, solid wedge.
For IBBM valves: Solid bronze in 2″ – 2 1/2″ sizes. Iron with bronze faces in 3″ and larger sizes.
Seats
Solid seat rings are bronze faced on 4 inch and smaller valves, and press-on bronze seat rings for larger size valves.
For all-iron valves: Screw in, iron seat rings.
For IBBM valves: Screw in bronze seat rings.
Repacking
Swing gland bolts and shelves facilitate repacking. Large stuffing boxes; repackable under pressure when wide open.
Flanges
Conform to American Standard Face to Face Dimensions, Ferrous Flanged Valves (ASME B16.10-1973) for 125 lb Cast Iron Wedge Gate Valves. Dimensions, drilling and facing of flanges conform to American Cast Iron Flange Standard, Class 125 (ASME B16.1-1967). Have plain face with smooth finish.
Lunkenheimer Gate Valves:
Fig 1430 IBBM
Fig 1430-GO-LF
Fig 1578 iron
Fig 1578N-4 MO stainless trim
