S31N

S31N

Miyawaki S31N Steam Trap | Thermodynamic Disc | Series S

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  • It can be installed vertically or horizontally
  • Small & Compact design. 
  • Simple design with minimal parts - Easy maintenance
  • Interior bimetal smoothly discharges low-temperature condensate and air in early stages of blow off

Screw Type (15A  / 20A / 25A)

Screw Type (32A  / 40A / 50A)

Nominal Diameter L H1 H2 W Weight (kg)
15 90 55 65 60 1.1
20 90 60 65 60 1.2
25 95 60 65 60 1.3
32 180 60 100 106 8.0
40 180 104 100 106 8.7
50 180 111 100 106 9.3

Flange Type (15A / 20A / 25A)

Flange Type (32A / 40A / 50A)

Nominal Diameter L H1 H2 W Weight (Kg)
15 140 55 65 60 2.5
20 150 60 65 60 3.0
25 160 60 65 60 4.2
32 240 104 100 106 12.0
40 240 104 100 106 13.5
50 240 104 100 106 14.5
Model Connection Nominal Diameter Max Op. Pressure Max
 Δ Pressure 		 Max Op. Temperature Material
S31N Screwed Rc, NPT 15 16 bar 16 bar 220°C Ductile Cast Iron
S31N Screwed Rc, NPT 20 16 bar 16 bar 220°C Ductile Cast Iron
S31N Screwed Rc, NPT 25 16 bar 16 bar 220°C Ductile Cast Iron
S31N Screwed Rc, NPT 32 16 bar 16 bar 220°C Ductile Cast Iron
S31N Screwed Rc, NPT 40 16 bar 16 bar 220°C Ductile Cast Iron
S31N Screwed Rc, NPT 50 16 bar 16 bar 220°C Ductile Cast Iron
S31NF Flange JIS / ASME / DIN 15 16 bar 16 bar 220°C Ductile Cast Iron
S31NF Flange JIS / ASME / DIN 20 16 bar 16 bar 220°C Ductile Cast Iron
S31NF Flange JIS / ASME / DIN 25 16 bar 16 bar 220°C Ductile Cast Iron
S31NF Flange JIS / ASME / DIN 32 16 bar 16 bar 220°C Ductile Cast Iron
S31NF Flange JIS / ASME / DIN 40 16 bar 16 bar 220°C Ductile Cast Iron
S31NF Flange JIS / ASME / DIN 50 16 bar 16 bar 220°C Ductile Cast Iron