References
Our collaboration with marketing and sales department of the Automation Machinery Plant POLNA S.A. in Przemyśl constitutes an example of a pattern of collaboration, is competent and fair.
doc dr Bolesław Kiczma
Dept. of biotechnology and molecular biology at the University of Opole.
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ROTARY PLUG CONTROL VALVES TYPE Z33
Rotary plug control valves Z33 (previous name BR33) 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.
High rangeability (200:1) 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 /diameter/ | DN25; 40; 50; 80; 100; 150; 200; 250; 300 |
| Nominal pressure |
• PN 10, 16, 25, 40
• CL150; CL300 |
| Flow ratio | 3 ... 1800 m3/h |
| Control characteristics | linear, equal percentage |
| Rangeability | 200:1 |
| Leakage class |
IV class acc PN-EN 60534-4 VI class acc PN-EN 60534-4 class from B to G acc PN-EN 12266-1 |
| Media temperature | - 40 ... + 450°C |
| Body materials |
carbon steel GP 240 GH (1.0619), WCB
carbon steel for low temperatures G20Mn5 (1.6220)
|
| Non-catalogue products | We can adjust these parameters to your individual needs. In such cases, please contact our technical support specialists. |
- 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 TA-LUFT 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 medium.
