Abstract: A fluid end manifold comprising a body having a front side and a back side, a first cylinder bore formed horizontally through the body, a second cylinder bore formed vertically through the body, a front mating face, and a back mating face, wherein the first and second cylinder bores intersect within the body to define an intersection region, wherein the front mating face is positioned on the front side of the body at a location corresponding to the intersection region, and wherein the back mating face is positioned on the back side of the body at a location corresponding to the intersection region.

Abstract: A gas-fired heat gun is ignited using an electrode tip located downstream of a flame holder such that the electrode tip is in the path of the flowing gas. The electrode is connected to a voltage source that causes a spark to jump from the electrode tip to another part of the heat gun, such as the flame holder or a casing of the heat gun, when a trigger is pulled, thereby igniting the flowing gas. The electrode is typically a thin wire extending through a portion of a diffuser defining a portion of the gas flow path upstream of the flame holder. The electrode may be continuous from the diffuser to a terminal end downstream of the flame holder.