Y53S/BT Type 5 Transmitter Manifold 6000PSI 316SS BSP Taper DP. The ‘Y53’ Type 5 valve manifolds are designed for direct mounting to differential pressure transmitters, with separate isolation and vent for LP and HP inlets plus equalising valve for simple calibration. Each needle valve head is designed for safe and reliable isolation, giving bubble tight shut off, with non-rotating & anti-galling tip and dynamic self-adjusting spindle seal to give long service life in a variety of service conditions.