Hex Valve has introduced its HM57 Five Valve Manifold, which combines two shut-off valves, two equalising valves, and a vent/calibration valve into a single, compact assembly. The double equalising arrangement insures against measurement error than can occur from equaliser leakage between high and low pressure connections, making the HM57 ideal for custody transfer applications. Whenever an expensive liquid or gas changes ownership, precise measurement is critical. The smallest leakage from the high side of the manifold to the low side of the manifold can lead to big dollars being lost due to inaccurate measurement. Therefore, when dealing with custody transfer or other critical flows, a five valve manifold should be used to achieve more accurate measurement. The number of threaded connections are greatly reduced when using the HM57 instead of needle valves, piping and tees, and, with fewer connections, there are fewer potential leak points and reduced risk of fugitive emissions. Shut-off, equalising and vent/calibration functions are provided in one compact valve body weighing only 3.75 pounds. Technicians can perform zeroing and calibration procedures at the manifold location with a minimum of tools. The HM57 is available in the standard carbon steel and stainless steel as well as exotic alloys including Monel, Inconel, Alloy 20, Hastelloy and Titanium.
