The document describes various models of two valve manifolds (2vm, 2va, 2vt, 2vq, 2vh, 2vtf, 2vs, 2vf, 2vr, 2vb, 2vc) offered by NK Instruments Pvt. Ltd., detailing their specifications, connection types, and configurations for process control instruments used in pressure, vacuum, and flow measurement. Each model varies in design elements like port configurations and bonnet placements, highlighting features such as maximum working pressure, temperature, and material make-up (stainless steel, etc.). The document also includes ordering instructions, contact information, and additional options available for customization.