• Size

    1-13/16” to 4-1/16”

  • Pressure Rating

    2,000 PSI to 5,000 PSI

  • Temperature Rating

    L-X (-50°F to 350°F)

  • Trim

    AA to HH

  • Product Specification Level

    PSL-1 to PSL-3G

The Neeco Model AN valve features an expanding gate which provides a mechanical seal / seating force which acts simultaneously against both seats. The seating force is not affected by line pressure fluctuations or vibrations.  Low pressure sealing is ensured due to the mechanical gate sealing capability: as this expanding gate type valve design does not rely on line pressure to obtain seal (as featured with many slab / floating gate designs).

Typical floating style (slab gate) valves are operated with handwheel (clockwise to open / counter clockwise to close).  When valve is in fully closed position the handwheel will come to stop, then operator is to back turn (1/4 to ½ turn) the handwheel to allow gate to “float”.

The Model AN valve design provides the engagement of mechanical seal of gate to seat by turning handwheel (clockwise to open / counter clockwise to close).  When valve is in fully closed position the handwheel will come to stop, then operator is to continue turn (1/4 to ½ turn) and the handwheel will transfer stem force to the gate to create wedge / expansion between gate and segment – making mechanical seal.