S Series | Thermodynamic Disc Steam Traps

Steam Traps S Series | Thermodynamic Disc Steam Traps S31N

Steam Traps S Series | Thermodynamic Disc Steam Traps

S31N

  • SCCV System
  • Stainless Steel
  • Supports condensate recovery
  • Horizontal installation
  • Vertical installation
  • Bypass function
  • Auto blow-off

    Models that handle steam locking also available

    Steam Traps S Series | Thermodynamic Disc Steam Traps S31N

    Features/Applications

    Features

    • Compact and cost effective design

      It has a space saving, simple mechanism with very few moving components.

    • Easy maintenance

      The minimum of moving parts and an easy in-line access ensures easy and fast maintenance.

    • Special design against steam locking

      To avoid cases of steam locking, Miyawaki offers special models to handle steam locking.
      (S31N-G/S31NF-G, S31N-2/S31NF-2)

    • Flexible installation

      This product can be installed either horizontally or vertically.

    • Auto blow off and air vent

      Thanks to a bimetal ring, the trap smoothly discharges initial air and cold condensate. (Auto blow-off mechanism)

    Typical applications

    Suitable for steam main lines, small steam equipment, and other such applications.

    Dimensions/Weight

    Dimensions/Weight

    Screwed

    ½”・¾”・1”

    S31N_RC_15-25.png

     

    1 ¼”・1 ½”・2”

    S31N_RC_32.png

     

    Size Dimensions (mm) Dimensions (in) Weight
    L H1 H2 W L H1 H2 W (kg) (lb)
    ½” 90 55 65 60 3.5 2.2 2.6 2.4 1,1 2.4
    ¾” 60 2.4 1,2 2.6
    1” 95 3.7 1,3 2.9
    1 ¼” 180 104 100 106 7.1 4.1 3.9 4.2 8,0 17.6
    1 ½” 8,7 19.2
    2” 111 4.4 9,3 20.5

     

     

    Flanged

    ½”・¾”・1”

    S31NF_15A.png

     

    1 ¼”・1 ½”・2”

    S31NF_32A.png

     

    Size Dimensions (mm) Dimensions (in) Weight
    L H1 H2 W L H1 H2 W (kg) (lb)
    ½” 140 55 65 60 5.5 2.2 2.6 2.4 2,5 5.5
    ¾” 150 60 5.9 2.4 3,0 6.6
    1” 160 6.3 4,2 9.2
    1 ¼” 240 104 100 106 9.5 4.1 3.9 4.2 12,0 26.4
    1 ½” 13,5 29.8
    2” 14,5 32.0

    Specifications

    Model Connection

    Max. operating

    pressure

    Max. operating

    pressure differential

    Max. operating

    temperature

    Body

    material

    Type Size

    PMO

    (MPa)

    PMO

    (psig)

    ⊿PMX

    (MPa)

    ⊿PMX

    (psig)

    TMO

    (℃)

    TMO

    (℉)

    S31N

    Screwed

    Rc,NPT

    ½” 1,6 230 1,6 230 220 428

    Ductile cast iron

    FCD450

    ¾”
    1”
    1 ¼”

    Cast iron

    FC250

    1 ½”
    2”
    S31NF

    Flanged

    FF,RF*

    ½”

    Ductile cast iron

    FCD450

    ¾”
    1”
    1 ¼”

    Cast iron

    FC250

    1 ½”
    2”

    *Available flange standards: ASME/JPI 150lb, 300lb, DIN PN16, JIS 10K, 16K, 20K. ASME/JPI 300lb not available for size 2”.

    ●Maximum allowable pressure (PMA): 1,6MPa (230psig)  PMA is the pressure that can be tolerated by pressure-resistant parts (body).
    ●Maximum allowable temperature (TMA): 220℃ (428℉)  TMA is the temperature that can be tolerated by pressure-resistant parts (body).
    ●Min. operating pressure differential (⊿PMN): 0,03MPa (4.4psig) ⊿PMN is the minimum operating pressure differential between the trap inlet and outlet.

    *Special design models against steam locking are available. 

    Model S31N-G (Screwed)
    S31NF-G (Flanged)
    S31N-2 (Screwed)
    S31NF-2 (Flanged)

    Discharge Capacity

    S31N.png

    Features

    • Compact and cost effective design

      It has a space saving, simple mechanism with very few moving components.

    • Easy maintenance

      The minimum of moving parts and an easy in-line access ensures easy and fast maintenance.

    • Special design against steam locking

      To avoid cases of steam locking, Miyawaki offers special models to handle steam locking.
      (S31N-G/S31NF-G, S31N-2/S31NF-2)

    • Flexible installation

      This product can be installed either horizontally or vertically.

    • Auto blow off and air vent

      Thanks to a bimetal ring, the trap smoothly discharges initial air and cold condensate. (Auto blow-off mechanism)

    Typical applications

    Suitable for steam main lines, small steam equipment, and other such applications.

    Dimensions/Weight

    Screwed

    ½”・¾”・1”

    S31N_RC_15-25.png

     

    1 ¼”・1 ½”・2”

    S31N_RC_32.png

     

    Size Dimensions (mm) Dimensions (in) Weight
    L H1 H2 W L H1 H2 W (kg) (lb)
    ½” 90 55 65 60 3.5 2.2 2.6 2.4 1,1 2.4
    ¾” 60 2.4 1,2 2.6
    1” 95 3.7 1,3 2.9
    1 ¼” 180 104 100 106 7.1 4.1 3.9 4.2 8,0 17.6
    1 ½” 8,7 19.2
    2” 111 4.4 9,3 20.5

     

     

    Flanged

    ½”・¾”・1”

    S31NF_15A.png

     

    1 ¼”・1 ½”・2”

    S31NF_32A.png

     

    Size Dimensions (mm) Dimensions (in) Weight
    L H1 H2 W L H1 H2 W (kg) (lb)
    ½” 140 55 65 60 5.5 2.2 2.6 2.4 2,5 5.5
    ¾” 150 60 5.9 2.4 3,0 6.6
    1” 160 6.3 4,2 9.2
    1 ¼” 240 104 100 106 9.5 4.1 3.9 4.2 12,0 26.4
    1 ½” 13,5 29.8
    2” 14,5 32.0
    Model Connection

    Max. operating

    pressure

    Max. operating

    pressure differential

    Max. operating

    temperature

    Body

    material

    Type Size

    PMO

    (MPa)

    PMO

    (psig)

    ⊿PMX

    (MPa)

    ⊿PMX

    (psig)

    TMO

    (℃)

    TMO

    (℉)

    S31N

    Screwed

    Rc,NPT

    ½” 1,6 230 1,6 230 220 428

    Ductile cast iron

    FCD450

    ¾”
    1”
    1 ¼”

    Cast iron

    FC250

    1 ½”
    2”
    S31NF

    Flanged

    FF,RF*

    ½”

    Ductile cast iron

    FCD450

    ¾”
    1”
    1 ¼”

    Cast iron

    FC250

    1 ½”
    2”

    *Available flange standards: ASME/JPI 150lb, 300lb, DIN PN16, JIS 10K, 16K, 20K. ASME/JPI 300lb not available for size 2”.

    ●Maximum allowable pressure (PMA): 1,6MPa (230psig)  PMA is the pressure that can be tolerated by pressure-resistant parts (body).
    ●Maximum allowable temperature (TMA): 220℃ (428℉)  TMA is the temperature that can be tolerated by pressure-resistant parts (body).
    ●Min. operating pressure differential (⊿PMN): 0,03MPa (4.4psig) ⊿PMN is the minimum operating pressure differential between the trap inlet and outlet.

    *Special design models against steam locking are available. 

    Model S31N-G (Screwed)
    S31NF-G (Flanged)
    S31N-2 (Screwed)
    S31NF-2 (Flanged)
    S31N.png

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