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BR 21a - pneumatic - DIN

Pneumatic control valve

Valve style
Ball valve

USAGE

  • Low-pressure service
  • On/off service

VERSION
DIN

MEDIUM TEMPERATURE
-10 to 200 °C / 14 to 392 °F

SUPPLY
Pneumatic

VALVE SIZE
DN 50 to DN 100

PRESSURE RATING
PN 10 to PN 16

Lining
PTFE

The valve BR 21a - pneumatic - DIN can be combinated with the following actuations:

Special features:

  • Rotary diaphragm actuator
  • Max. opening angle 90 ±3°
  • Signal pressures from 2.5 to 6.0 bar
  • Temperatures from –35 to +90 °C
  • Torques from 15 to 5619 Nm
  • Powerful thrust at high stroking speed and minimum friction by using low-wear rolling diaphragms
  • Backlash- and maintenance-free bearings
  • Direction of action (fail-open/fail-close) depending on the attachment to the rotary actuator
  • Travel stops externally adjustable to limit the opening angle
  • Excellent control properties thanks to large travel
  • Interfaces according to DIN EN ISO 5211 and VDI/VDE 3845

Special features:

  • Single-acting and double-acting piston actuator
  • Suitable for strict requirements in chemical plants
  • Opening angle 90°
  • Signal pressures up to 10 bar
  • Torques from 5 to 11674 Nm
  • Temperatures from –40 to +80 °C
  • End positions adjustable within wide range (+5°/–15°)
  • Diagonal or parallel square drive position
  • Position indicator adjustable in steps of 45°
  • Encapsulated spring assemblies
  • Power transmission without clearance thanks to involute gearing
  • Direction of rotation reversible without requiring additional parts
  • Surface treatment tested by Kesternich sulfur dioxide corrosion test and salt spray test
  • Centering ring milled into the housing
  • Standardized attachment of valve accessories according to VDI/VDE 3845 or NAMUR
  • Simple attachment according to DIN EN ISO 5211
  • Blow-out-proof travel stop screws
  • Fast stroking speeds as standard

Special features:

  • Single-acting and double-acting piston actuator
  • Suitable for strict requirements in chemical plants
  • Opening angle 90°
  • Signal pressures up to 10 bar
  • Torques from 5 to 11674 Nm
  • Temperatures from –40 to +80 °C
  • End positions adjustable within wide range (+5°/–15°)
  • Diagonal or parallel square drive position
  • Position indicator adjustable in steps of 45°
  • Encapsulated spring assemblies
  • Backlash-free force transmission thanks to involute gearing
  • Direction of rotation reversible without requiring additional parts
  • Surface treatment tested by Kesternich sulfur dioxide corrosion test and salt spray test
  • Centering ring milled into the housing
  • Standardized attachment of valve accessories according to VDI/VDE 3845 or NAMUR
  • Simple attachment according to DIN EN ISO 5211
  • Blow-out-proof travel stop screws
  • Fast stroking speeds as standard

Special features

  • Consisting of PTFE-lined discharge ball valve and actuator
  • Suitable for (highly) corrosive process media
  • DIN ISO 5211 interface as standard
  • Straight-through flow path
  • 5 to 8 mm PTFE lining
  • Single-piece ball shaft
  • Blow-out-proof shaft
  • Replaceable PTFE seals
  • PTFE V-ring packing loaded by disk springs
  • TA Luft
  • Face-to-face dimensions according to DIN EN 558, Series 1 or 3
  • Leakage requirements according to DIN EN 12266 or API 598

Accessories

  • Lever
  • Locking facility
  • Air filters

Options

  • Stem extension
  • Stainless steel body
  • Calibrated seals
  • Linings of special compounds, such as conductive PTFE
  • Heating jacket
  • Double packing
  • Grooved flanges according to DIN EN 1092
  • FDA-compliant seals
  • Balls and seals made of different materials

Information

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