ZZY Type Self-Operated control valve

ZZY Type Self-Operated control valve introduction
ZZY type self-operated control valve don’t need extra power, but take controlled media energy as power supply。 It brings in actuator to control valve disk position and change two ends differents pressure and flow to make valve upstream and backstream pressure stability. It has agility, good sealing, pressure set point small fluctuations and other advantage and it is used widely in gas, liquid and steam medium to reduce and stable pressure or reliefe pressure self-control. This series products have reduce pressure by backstream pressure control (B type) and reliefe pressure by upstream pressure control (K type). Pressure phase control scape: 15~250 KPa . It can satisfy clients working condition requiremtn as per need assemble.
ZZY Type Self-Operated control valve Specification
Body type : Straight casing ball type body
Disk type : Quick open disk
Nominal diameter : DN20—300 , NPS 3/4’’—12’’
Nominal pressure : PN16—64 Class 150LB—300LB
Connection : Flange , FF. RF. RTJ and so on
Bonnet type : Bolted bonnet
Packing:V type PTFE
Sealing gasket : Metal clip graphite
Actuator: Film slef type 、Piston self type
Surface painting :Green Acrylic polyurethane enamel
Code

ZZY Type Self-Operated control valve

ZZY Type Self-Operated control valve


Performance and parameter chart
ZZY Type Self-Operated control valve

ZZY Type Self-Operated control valve


Material and applicable temperature
Chart 1: Body, bonnet material applicable and presure scope(ANSI)
ZZY Type Self-Operated control valve

ZZY Type Self-Operated control valve


Chart 2: Body, bonnet material applicable and presure scope(GB)
ZZY Type Self-Operated control valve

ZZY Type Self-Operated control valve


Note:1. If temperature or pressure is at middle of showed figure , we can use interpolation to get Max working pressure or temperature.
2. The pressure in chart are all gauge pressure.
Standard material and inside structure
ZZY Type Self-Operated control valve

ZZY Type Self-Operated control valve


Dimension and weight
ZZY Type Self-Operated control valve

ZZY Type Self-Operated control valve