Lunkenheimer Fig. 180 ''Y" Blow-off valves conform to the ASME Boiler Code and are suitable for boiler service up to 80% of valve working steam pressure. Also provide approximate flow and drainage of a gate valve and may be used as such on other services. Also for throttling and fine regulation.
Bodies and bonnets ASTM B61 type-S-1 steam bronze. Seat opening permits almost unrestricted flow. Cylindrical guides insure proper disc seating.
Union Bonnet: Assures strong, pressure-tight connections, facilitates cleaning and inspection.
Discs and seat rings: Regrindable, renewable. NT4 nickel alloy.
Back seats: Repackable when disc is wide open under pressure.