The valve applies large & small spool pilot-operated structure. It provides a separate pressure-balanced pilot-operated spool, and has the merits of small volume, compact structure, good sealing effect, superior cutting ability, wide range of applications and long service life, and are applied widely in automation system. Under high-temperature and high pressure difference occasion, even if micro leakage in the seat will cause the cavitation and erode the spool and seat for a long time and result in the damage of trim. Therefore, as required for zero leakage and full sealing, the valve is extremely important in this occasion. The common measure is to enlarge the output force of the actuator to enhance the sealing grade. However, the pilot-operated single-seat control valve reduces the dimension of the actuator and increases the sealing effect and strengthens the competitiveness by applying the imbalance force arisen from the pressure difference of the medium.

Parameters

Size：1-1/2"~24" (DN40~DN600)

Pressure Rating：ASME CLASS 900~2500 (PN160~PN420)

Body material：Carbon steel, Stainless steel, Alloy steel, Duplex stainless steel

Temperature Range：-196℃~540℃

Seat Leakage：ANSI Ⅴ(No visible leakage)

Bonnet Type：Fin-Extension