Valve manifolds – general information
Valve manifolds integrate several valves together in a common, single body. They are mounted in control and measuring equipment systems directly before pressure gauges or pressure transmitters to protect these instruments against damage. The inlets of the valve manifold are connected to process lines, whereas the outlets connect measuring instruments. Manipulating the valves of the manifold allows making safe static pressure measurements, shutting a measuring instrument off from the process line, venting or releasing the agent from the instrument line, instrument calibration. The valve manifolds are commonly used with differential pressure transmitters. By measuring pressure difference in two spots of the processing system (measuring differential pressure), the flow rate can be determined, fluid level can be measured in closed tanks, pumps and filters can be easily inspected. The valve manifolds are widely used in industrial systems, especially those in the chemical industry and petrochemical industry (Oil & Gas). Tubes International offers 1, 2, 3, 4 and 5 – valve manifolds by HAM-LET ASTAVA.
An example of the simplest configuration is 2-valve manifold with an inlet, main outlet and vent outlet. A pressure gauge is connected to the main outlet, the vent outlet remains free. To check pressure in the system, open the shut-off valve, then the pressure is supplied to the pressure gauge. To release the pressure from the pressure gauge, not causing damage, first close the shut-off valve and then open the vent valve, which releases the pressure from the pressure gauge. With the valve manifold fitted in the process line, you can measure the pressure in the system at any moment, in a safe and easy way.