Three Valve Manifolds-Direct Mounting can be directly mounted on the transmitter having 54 mm centre to centre connection. Aptek Instrumentation Pvt. Ltd offers Three 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. Three Valve Manifolds-Direct Mounting are mainly used with DP transmitter. The inlet is either 1/2" NPTF or flanged & outlet is flanged. Two isolation valves and one equalizer valve is provides alongÿwith the 1/4" NPTF drain as an option.