Control valve type Z33

Rotary plug control valves Z33 represent the design of valves, where change in flow ratio is achieved through
eccentrically set rotary plug.
Such structures are particularly useful for control of flow under heavy-duty conditions, with high probability of
cavitation and erosion.
Possibility of obtaining high flows and wide range of material and design variants make them ideal for application
in many branches of industry, such as power generation, metallurgy, chemical and petroleum industry, food
industry, paper industry, etc.

Nominal sizes DN25 ; 40 ; 50 ; 80 ; 100 ; 150 ; 200 ; 250 ; 300 ; 400 ; 450
Nominal pressure • PN10 ; 16 ; 25 ; 40 ; 63 • CL150 ; CL300
Flow ratios 3 ... 2160 m3/h
Plug characteristics and type linear, equal percentage
Rangeability 50:1
Leakage class - basic: class IV as per PN-EN 60534-4 - blister: class VI as per PN-EN 60534-4
Temperature range - 40 ... + 450°C
Body material carbon cast steel GP 240 GH, WCB carbon cast steel for low temperatures G20Mn5 acid-resistant cast steel GX5CrNiMo, CF8M
  • one-piece valve body (cast with bonnet), no static or dynamic sealing except shaft sealing chamber
  • no “detachment effect” between plug and seat
  • ability to change Kvs without changing plug or seat
  • easy replacement of rotary, symmetrical plug
  • elongated bonnet allows application of double sealing for shaft, meeting “low emission” standards equal to TALUFT conditions
  • the same Kvs coefficients for “hard” and “soft” seats
  • leakage class less than 0.01%Kvs for “hard” seats (metal-metal)
  • same flow direction for “hard” and “soft” seats
  • valve-actuator connection accessible from outside, which allows pivoting actuator to valve axis by 90° increments
  • special executions: with heat jacket, erosion-proof, for crystallizable media
We can adjust the control valve according to your individual needs. In such cases, please contact our technical support specialist.