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3251 - pneumatic - DIN

Pneumatic control valve

Valve style
Globe valve

USAGE

  • Low-pressure service
  • On/off service
  • Throttling service
  • High-pressure service

VERSION
DIN

MEDIUM TEMPERATURE
-196 to 550 °C / -320.8 to 1022 °F

SUPPLY
Pneumatic

VALVE SIZE
DN 15 to DN 500

PRESSURE RATING
PN 16 to PN 400

Lining
without

The valve 3251 - pneumatic - DIN can be combinated with the following actuations:

Special features:

  • Single-acting linear actuator with rolling diaphragm and internal springs
  • Diaphragm areas from 120 to 2x2800 cm²
  • Low overall height
  • Powerful thrust at high stroking speed
  • Low friction
  • Various bench ranges by varying the number of springs or their compression
  • No special tools required to change the bench range or reverse the direction of action (also version with handwheel)

Special features:

  • Single-acting linear actuator with rolling diaphragm and internal springs
  • Diaphragm areas from 120 to 750 cm²
  • Direct attachment of accessories on additional yoke with concealed travel pick-off
  • Low overall height
  • Powerful thrust at high stroking speed
  • Low friction
  • Various bench ranges by varying the number of springs or their compression
  • No special tools required to change the bench range or reverse the direction of action (also version with handwheel)

Special features:

  • Spindle actuator with non-rising handwheel
  • Handwheel diameter 180 or 250 mm
  • Low overall height
  • Simple connection to the valve
  • Locking mechanism to secure the valve stem position against accidental adjustment

Special features

  • Consisting of globe valve and actuator
  • Low-noise valve plug
  • Pressure balancing to handle large pressure drops

Accessories

  • Type 2 N Strainer
  • Type 2 NI Strainer

Options

  • Welding or welding-neck ends
  • Flow divider or AC-trim for noise reduction
  • Insulating section or bellows seal
  • Heating jacket
  • Perforated plug
  • Silencers

Information

  • WA 263

    Brochure: AC Valve Trims
    Anti-cavitation system
    [EN] [DE]
  • AB 0100

    Tightening torques · Lubricants · Tools
    for Type 3241, Type 3244, Type 3246, Type 3248, Type 3510, Type 3321, Type 3321CT, Type 3323, Type 3271, Type 3277, Type 3371, Type 3372, Type 3571, Type 3251, Type 3253, Type 3254, Type 3256, Type 3259, Type 3281, Type 3286, Type 3291, Type 3296, Type 3349 and Type 3275
    [EN] [DE]
  • AB 05

    KV coefficient · Valve sizing
    [EN] [DE]
  • AB 02

    Flanges
    Connecting dimensions according to DIN EN 1092-1 and DIN 2501-1
    [EN] [DE]
  • T 8083

    Series 250 · Pneumatic Control Valves with AC‑3 or AC‑5 Trim
    [EN] [DE]
  • T 8084

    Type 3381 Silencer
    for Type 3251, Type 3254, Type 3256 and Type 3241
    DIN and ANSI versions
    [EN] [DE] [FR]
  • T 8082

    Pneumatic Control Valves with AC‑1 or AC‑2 Trim
    [EN] [DE]
  • T 8086

    Series 240 and 250 · Valves with perforated plug
    DIN and ANSI versions
    [EN] [DE]
  • T 8081

    Flow Dividers for Control Valves
    St 1 · St 2 · St 3
    [EN] [DE] [FR]
  • T 8087

    Control Valves with Zero Travel 1 Trim
    for Type 3251 and Type 3256
    DIN and ANSI versions
    [EN] [DE]
  • T 8071

    Control Valves with Ceramic Trims
    [EN] [DE] [RU] [IT]
  • T 8051

    Type 3251-1 and Type 3251-7 Pneumatic Control Valves
    Type 3251 Globe Valve
    DIN version
    [EN] [DE] [FR]
  • T 8000-1

    Series 240 · 250 · 280 · 290 · Series V2001 · PFEIFFER
    Electric and Pneumatic Control Valves
    Information Sheet Part 1
    [EN] [DE]
  • T 8000-2

    Series 240 · 250 · 280 · 290 · Pfeiffer
    Pneumatic and Electric Control Valves
    Information Sheet Part 2
    Materials and pressure-temperature diagrams
    [EN] [DE] [FR]
  • T 8000-3

    Series 240 · 250
    Pneumatic and Electric Control Valves
    Information Sheet Part 3
    Valve flow coefficients
    Type 3241 · Type 3249 · Type 3251 · Type 3254 · Type 3256 · Type 3321
    [EN] [DE]
  • T 8000-4

    Series 240 · 250 · 280
    Pneumatic Control Valves
    Information Sheet Part 4
    Permissible differential pressures for valves
    Type 3241 · Type 3251 · Type 3254 · Type 3256 Type 3281 · Type 3284 · Type 3286
    [EN] [DE]

Support

  • SH 8051

    Type 3251 Globe Valve
    [EN] [DE]
  • H 01

    Oxygen
    Instructions and information on how to safely handle devices for oxygen service
    [EN] [DE]

DXF file from data sheet

Certificates

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