Bluestar International supplies Two Way Manifold Valves. Bluestar International is an ISO 9001:2000 and 14001:2004 certified company. Bluestar International manufactures instrumentation fittings and flanges. Two Way Manifold Valves to flange design is used for separate mounting. Two Way Manifold Valves is provided with the features of connecting system impulse lines and transmitters. Having simple two valve configuration, it allows for easy block, bleed & calibration of a static pressure transmitter or gauge.