| 摘要 |
An integral valve manifold body (120) for a pressure transmitter has four instrument mounting holes (160, 161, 162, 163) the centres of which define corners of an imaginary prism. The valve chambers which define respective valve seats (148, 152, etc.) are so disposed that the valve seats and at least a part of each valve chambers are all within the imaginary prism. Two valve bores, preferably vent valve bores (148, 152), are machined in one (125) of peripheral walls of the manifold body. They are provided with valves of the type where the valve stem is sealed against the valve chamber (14, 152) rather than the bonnet. All passages (142, 145, etc.) of the passageway system of the manifold are straight, disposed within said prism, and parallel with at least one of planar exterior walls (123, 124, 125, etc.) of manifold block to facilitate the manufacture.
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