Gland. The sliding bushing for holding packing into a stuffing box, adjusted by studs and nuts.
Goose neck. A pipe fitting having two bends in opposite directions which resemble the neck of a goose.
Gridiron Valve. A type of slide valve familiarly called a “grid,” which may be circular or rectangular, consisting of alternate bars and spaces, sliding over a similarly formed seat, the object being to obtain the necessary steam way with a diminished amount of valve travel.
Hand-Nut. A nut having wings or projections so that it may be screwed up by hand without the aid of a wrench.
Hand-Nut.
Head of water. In hydraulics “head“ means pressure due to height of column of water.
Heat Units. The unit of heat is the amount of heat required to raise one pound of water one degree, usually from 32° to 33° Fahr.
“Hesitates.” A pump is said to “hesitate” when the motion becomes uncertain.