A valve for a dispenser, the valve comprising: - a valve body comprising: - an outer surface and an inner passageway extending about a longitudinal axis, wherein the inner passageway comprises a first passageway opening and a second passageway opening and a passageway surface extending from the first passageway opening to the second passageway opening; - a first valve body surface and a second valve body surface opposite the first valve body surface, the first and second valve body surfaces (96, 98) extending from the outer surface of the valve body to the inner passageway; and- a valve body cavity extending about the longitudinal axis, wherein the valve body cavity: - is positioned adjacent the inner passageway; - extends from the inner passageway toward the outer surface; and - extends from the second valve body surface towards the first valve body surface 96 - a valve seal comprising a first seal surface and a second seal surface opposite the first seal surface, wherein the first seal surface abuts at least a portion of the passageway surface, wherein a portion of the valve seal extends from the inner passageway about the second passageway opening and into at least a portion of the valve body cavity; and - a valve stem extending through the inner passageway, wherein the valve stem comprises an outer stem surface and an inner stem surface opposite the outer stem surface, wherein a portion of the second seal surface of the valve seal operatively engages a portion of the outer stem surface. - a valve body comprising: - an outer surface and an inner passageway extending about a longitudinal axis, wherein the inner passageway comprises a first passageway opening and a second passageway opening and a passageway surface extending from the first passageway opening to the second passageway opening; - a first valve body surface and a second valve body surface opposite the first valve body surface, the first and second valve body surfaces (96, 98) extending from the outer surface of the valve body to the inner passageway; and- a valve body cavity extending about the longitudinal axis, wherein the valve body cavity: - is positioned adjacent the inner passageway; - extends from the inner passageway toward the outer surface; and - extends from the second valve body surface towards the first valve body surface 96 - an outer surface and an inner passageway extending about a longitudinal axis, wherein the inner passageway comprises a first passageway opening and a second passageway opening and a passageway surface extending from the first passageway opening to the second passageway opening; - a first valve body surface and a second valve body surface opposite the first valve body surface, the first and second valve body surfaces (96, 98) extending from the outer surface of the valve body to the inner passageway; and- a valve body cavity extending about the longitudinal axis, wherein the valve body cavity: - is positioned adjacent the inner passageway; - extends from the inner passageway toward the outer surface; and - extends from the second valve body surface towards the first valve body surface 96 - is positioned adjacent the inner passageway; - extends from the inner passageway toward the outer surface; and - extends from the second valve body surface towards the first valve body surface 96 - a valve seal comprising a first seal surface and a second seal surface opposite the first seal surface, wherein the first seal surface abuts at least a portion of the passageway surface, wherein a portion of the valve seal extends from the inner passageway about the second passageway opening and into at least a portion of the valve body cavity; and - a valve stem extending through the inner passageway, wherein the valve stem comprises an outer stem surface and an inner stem surface opposite the outer stem surface,