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3281 - pneumatic - ANSI

Pneumatic control valve

Valve style
Globe valve

USAGE

  • Steam conditioning

VERSION
ANSI

MEDIUM TEMPERATURE
-10 to 500 °C / 14 to 932 °F

SUPPLY
Pneumatic

VALVE SIZE
NPS 2 to NPS 12

PRESSURE RATING
Class 150 to Class 900

Lining
without

Special features

  • Steam conditioning valve in globe style with actuator
  • Low-noise valve plug
  • Pressure balancing to handle large pressure drops

Accessories

  • Type 2 N Strainer
  • Type 2 NI Strainer

Options

  • Welding ends
  • Insulating section
  • Perforated plug

The valve 3281 - pneumatic - ANSI 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

Information

  • WA 315

    Brochure: Steam Conditioning Valves
    Series 280
    [EN][DE]
  • AB 0100

    Servicing SAMSON Products
    Tightening Torques · Lubricants · Tools
    Electric and Pneumatic Control Valves
    Type 3241, Type 3244, Type 3246, Type 3248, Type 3249, 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, Type 3275, Type 3275A and Type 3310 (edition 2020)
    [EN][DE]
  • T 8252

    Type 3281-1 and Type 3281-7 Pneumatic Steam Conditioning Valves
    Type 3281 Steam Conditioning Valve
    ANSI version
    [EN][DE]
  • T 8000-1

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

    Information Sheet:
    Electric and Pneumatic Control Valves
    Series 240 • 250 • 280 • 290 • SAMSON PFEIFFER
    Materials and pressure-temperature diagrams
    [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

  • EB 8252

    Type 3281 Steam Conditioning Valve
    ANSI version
    [EN][DE]

DXF file from data sheet

Certificates

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