5 Valve Manifolds-Direct Mounting are designed for direct mounting to differential transmitter. The instruments side is providedÿwith a standard flange of 54 mm center distance. Aptek Instrumentation Pvt. Ltd offers 5 Valve Manifolds-Direct Mounting. Aptek Instrumentation Pvt. Ltd is an ISO 9001: 2008 certified company manufacturing a wide range of Instrumentation valves, tube fittings, various Instrumentationÿaccessories. The products manufactured by the company include 2,3,5 manifold Valves, Low, High Pressure Ball Valves, Instrumentation Ball Valves, Mono-flange instrumentation valves, Needle Valves, Gauge Valves, Instrumentation Tube Fittings, Instrumentation Pipe Fittings, Pressure Gauge Accessories, Thermo wells, pressure gauge, Gauge bleed valve, Gauge vent valve, Multi port Gauge valve, Forged Body Gauge valve etc. 5 Valve Manifolds-Direct Mounting are having two isolation, one equalizer and two vent/calibration valves. The standard process & instruments connections are 1/2" NPT. Two vent connections are 1/4" NPT in all manifolds & provided with blanking plugs.