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Control valves type Z

Applied in automatic and remote control installations as flow control elements to adjust flow of liquids and gases.

Wide range of material and design versions make the valves widely sought-after in chemical industry, heat and power generation industry, paper industry, food industry, metallurgy, coal mining etc. In Europe they are known as BR11.

We can adjust the control valve to match your individual needs.

Nominal sizes DN15; 20; 25; 32; 40; 50; 65; 80; 100; 125; 150; 200; 250
Nominal pressure • PN10; 16; 25; 40 • CL150; CL300
Flow ratio 0,01 ... 800 m3/h
Control characteristics linear, equal percentage, quick-opening, modified
Rangeability50:1, non-catalogue - 100:1
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 - 196 ... + 450°C
Body materials grey cast iron EN-GJL 250 ductile cast iron EN-GJS 400-18LT carbon cast steel GP 240 GH (1.0619), G20Mn5 (1.6220), WCB acid-resistant cast steel GX5CrNiMo 19-11-2, CF8M Use of other materials is possible, but must be agreed upon.
Non-catalogue products We can adjust these parameters to your individual needs. In such cases, please contact our technical support specialist. In the menu: “Non-catalogue version control valves” and “New products” we present the following examples.
  • range of nominal sizes from DN15 to DN250 for pressure values PN10 to CL300
  • various materials of valve body cast and internal parts, adapted to specific working conditions
  • wide range of flow ratios and control characteristics
  • reduction in aggressive and toxic media emissions to the environment through application of bellow seal bonnets or bonnet packings meeting the requirements of TA – LUFT
  • 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 matching with reversible action P/R (column) multi-spring actuators and changing the spring range with no extra parts (keeping the number of springs)
  • possibility of fitting actuators with top drive
  • possibility of performing diagnostics of “valve-actuator” system due to application of smart electro-pneumatic positioners
  • high tightness of closure due to application of soft valve seats (with PTFE seals in the whole range of flows and characteristics, for valve plugs, balanced and unbalanced)
  • same flow ratios and control characteristics for “hard” valve seats (metal-to-metal) and “soft” valve seats
  • (metal-to-gasket), for valve plugs, balanced and unbalanced
  • reliable actuator-stem and valve seat-body connections
  • small guiding sleeve control forces due to application of balanced valve plugs in valves DN40…250
  • top-class flat and bonnet packings
  • wide range of electric actuators
  • possibility of matching with NN type manual drives
  • possibility of special executions: for oxygen, hydrogen, gas fuels; low temperature mediums (liquid oxygen, liquid nitrogen), acid gases containing H2S; for explosive atmospheres as per 94/9/EC – ATEX
  • competitive prices – as a result of a simple and functional design of valves and actuators, as well as applied materials
  • the design and production process meet the requirements of Quality Management System ISO 9001 and Directive 97/23/EC, and regulations of AD2000 Merkblatt, designated for installation on pipelines
We can adjust the control valve to match your individual needs. In such cases, please contact our technical support specialist.


ul. Obozowa 23 Str
37-700 Przemyśl

TEL: +48 16 678 66 01
E-MAIL: sekretariat@polna.com.pl

KRS: NATIONAL COURT REGISTER: 0000090173 dated 12.02.2002 r. Provincial Court in Rzeszów, XII Division of National Court Register
COMPANY ID: 650009986     NIP: 795-020-07-05     BDO: 000030128
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