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Single-ported globe control valves type Z1A - POLNA S.A.

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

A wide range of material executions, high parameters in the range of pressures and operating temperatures, numerous design variants adapted to the requirements of the technological process allow these valves to be used for the most demanding conditions in power engineering, petrochemical, heating, chemical industry, metallurgy etc. In Europe they are known as BR12A.

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

Nominal sizes /diameter/ DN15; 20; 25; 40; 50; 80; 100; 150; 200; 250; 300
Nominal pressure • PN10; 16; 25; 40; 63; 100; 160; 250; 320; 400 • possible execution to PN630 • PN-H-74306:1985; PN-H-74307:1985. • CL150; CL300; CL600; CL900; CL1500; CL2500
Flow ratio 0,1 ... 960 m3/h
Control characteristics linear, equal percentage, quick-opening, modified
Rangeability 50:1, 100:1
Leakage class IV class acc. to PN-EN 60534-4 V class acc. to PN-EN 60534-4 VI class acc. to PN-EN 60534-4 – non-catalogue class from B to G acc. to PN-EN 12266-1
Media temperature - 196 ... + 650°C
Body materials carbon cast steel GP 240 GH (1.0619), WCB alloy cast steel G17CrMo9-10 (1.7379), WC9 carbon cast steel for low temperatures G20Mn5 (1.6220) acid-resistant cast steel GX5CrNiMo 19-11-2 (1.4408), 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.
  • various materials of valve body cast and internal parts, adapted to specific working conditions
  • constructional designs limiting the level of generated noise, increasing resistance to cavitation and flashing, enabling elimination of throttled flow
  • wide range of nominal pressures from PN10 to CL2500, as well as 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 P1/R1 (with cast yoke) and P/R (column) multi-spring actuators and changing the spring range with no extra parts (keeping the number of springs)
  • possibility of equipping the actuators with a side (up to P1/R1) or top (up to P/R) manual drive,
  • possibility of performing diagnostics of “valve-actuator” system due to application of smart electro-pneumatic positioners
  • wide range of electric drives
  • possibility of special executions: for oxygen, hydrogen, low temperature mediums (liquid oxygen, liquid nitrogen), acid gases containing H2S; with heating jacket; for explosive atmospheres as per 94/9/EC – ATEX
  • 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
SHARE CAPITAL: 3.710.992,60 PLN
PAID CAPITAL: 3.710.992,60 PLN
BANK ACCOUNT NUMBER: 88 1030 1250 0000 0000 8901 4018 EUR SWIFT: CITIPLPX