References
Constructer of petroleum installations "Naftomontaż" Co, ltd confirms that Automation Machinery Plant POLNA S.A. in Przemyśl performed the ordered work with due care, taking into account the latest technical solutions, and in accordance with existing regulations and standards, as well as with good engineering practice.
Andrzej Liput
Budownictwo Naftowe NAFTOMONTAŻ- Spółka z o.o.
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SINGLE-PORTED GLOBE CONTROL VALVES TYPE Z2
Single-ported globe control valves type Z2 are used in automatic systems and remote control instalations as executive elements to control flow of liquids and gases.
Operation (reverse action – air-to-open) and actuator assembly are adapted for SIEMENS electric and electro-hydraulic actuators. Recommended for application in city heating and HVAC systems and many branches of industry.
| Nominal sizes /diameter/ | DN15; 20; 25; 32; 40; 50; 65; 80; 100; 150 |
| Nominal pressure |
• PN 10, 16, 25, 40 • CL150; CL300 |
| Flow ratio | 0,25 ... 320 m3/h |
| Control characteristics | linear, equal percentage, modified |
| Rangeability | 50:1 |
| Leakage class |
IV class acc PN-EN 60534-4 VI class acc PN-EN 60534-4 |
| Media temperature | - 15 ... + 350°C |
| Body materials |
cast iron EN-GJL 250
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. |
- wide range of nominal dimensions, DN15…150 for nominal pressures PN10…40; CL150; CL300,
- various materials for valve body and internal parts casts, adapted to specific working conditions.
- wide range of flow coefficients and control characteristics,
- easy assembly and dismantling of valve internal parts for maintenance and service,
- high durability and reliability due to application of top-class materials and surface improvement processes (burnishing, stelliting, heat treatment, CrN coatings),
- possibility of mating with emergency function electric and electro-hydraulic actuators (no air – valve closed) or without emergency function (no air - valve remains in previous position),
- wide range of electric actuators, regarding supply and control type, available forces, operation speed and accessories,
- high tightness of closure due to application of soft seats (PTFE sealing) in the whole range of flows and characteristics, for balanced and unbalanced plugs.
- same flow ratios and control characteristics for “hard” (metal-metal) and “soft” (metal-gasket) seats, for lightened and non-lightened plugs,
- reliable connection between actuator stem and valve, and between seat and body,
- small resetting forces due to application of lightened plugs for valves DN32...150,
- top-class flat sealing and bonnet packing,
- competitive prices due to simple and functional design of valves and actuators and materials applied,
- design and production processes meet the requirements of Quality Management System ISO 9001 and Directive 97/23/EC, and regulations of AD2000 Merkblatt, designated for installation on pipelines.
