Thermodynamic Disc Traps – Series S

Thermodynamic Steam Traps operate on the basis of the Bernoulli principle, depending on the relationship between the velocity and the pressure exerted by the condensate and steam inside the steam trap.
They have only one moving part – the disc.

Due to their compact design and cost effectiveness thermodynamic steam traps are widely used in applications where the condensate must be removed immediately from steam lines and steam equipment. They discharge he condensate near the saturation temperature. The traps may operate up to a back pressure of 80% of the inlet pressure, but for smooth operation it is recommended that the back pressure does not exceed 50% of the inlet pressure. Thermodynamic steam traps discharge the condensate intermittently.

 

All steam traps are equipped with a hardened stainless steel disc and seat. After the lapping process all the discs surfaces are controlled individually before releasing them for use in steam traps. These features and very high and severe quality standards for the whole production process give MIYAWAKI’s thermodynamic steam traps a long and reliable service life.

Application
Light to medium condensate loads: 

  • steam tracing
  • Steam main drips
  • Small heat exchangers
  • Unit heaters, sterilizer
  • Many other applications in the petrochemical, chemical, textile, food, pharmaceutical and further industries. 

Series SV Thermodynamic Steam Traps with inbuilt bypass are designed for special applications in the food, pharmaceutical or other industries or laundry applications where costs and spare must be saved.

SD1

Sizes Available Connections Maximum Operating Pressure Maximum Operating Temperature Body and Cover Material Download
1/4″ – 1/2″ Screwed Rc & NPT 600  psig CWP 400°C Stainless Steel
Miyawaki SD1 Steam Trap

SU2N (SU2H)

Sizes Available Connections Maximum Operating Pressure Maximum Operating Temperature Body and Cover Material Download
 1/2″ – 1″  Screwed
Rc & NPT
Socket weld
JIS, ASME, DIN
Flanged
JIS, ASME, DIN
46 bar / 667 psig (SU2N) 64 bar / 930 psig (SU2H)  425°C Stainless Steel

S31N

Sizes Available Connections Maximum Operating Pressure Maximum Operating Temperature Body and Cover Material Download
 1/2″ – 1″  Screwed
Rc & NPT
Flanged
JIS, ASME, DIN
 21 bar / 305 psig  220°C Ductile Cast Iron
 1 1/4″ – 2″  Screwed
Rc & NPT
Flanged
JIS, ASME, DIN
 21 bar / 305 psig  220°C Cast Iron
Thermodynamic disc steam trap

SC31

Sizes Available Connections Maximum Operating Pressure Maximum Operating Temperature Body and Cover Material Download
 1/2″ – 1″  Screwed
Rc & NPT
Flanged
JIS, ASME, DIN
 21 bar / 305 psig  220°C Stainless Steel
Thermodynamic disc steam trap

S55N (S55H)​

Sizes Available Connections Maximum Operating Pressure Maximum Operating Temperature Body and Cover Material Download
 1/2″ – 1″  Screwed
Rc & NPT
Socket weld
JIS, ASME, DIN
Flanged
JIS, ASME, DIN
 46 bar / 667 psig  425°C  Forged Steel

S61N​

Sizes Available Connections Maximum Operating Pressure Maximum Operating Temperature Body and Cover Material Download
 1/2″ – 1″  Screwed
Rc & NPT
Socket weld
JIS, ASME, DIN
Flanged
JIS, ASME, DI
 65 bar / 943 psig  425 °C Forged Steel

S62N

Sizes Available Connections Maximum Operating Pressure Maximum Operating Temperature Body and Cover Material Download
 1/2″ – 1″  Screwed
Rc & NPT
Socket weld
JIS, ASME, DIN
Flanged
JIS, ASME, DI
 65 bar / 943 psig  475 °C Forged Steel

SC/SF

Sizes Available Connections Maximum Operating Pressure Maximum Operating Temperature Body and Cover Material Download
 3/4″ – 1″  Screwed
Rc & NPT
Flanged
JIS, ASME, DIN
 16 bar / 230 psig  220°C Cast Iron
Miyawaki SCSF Steam Trap

SL3

Sizes Available Connections Maximum Operating Pressure Maximum Operating Temperature Body and Cover Material Download
 1/4″ – 1″  Screwed
Rc & NPT
 10 bar / 145 psig  400°C Stainless Steel

Steam Trap with Two-Bolt Connection (Universal)

DC1-21U

Model Sizes Available Connections Maximum Operating Pressure Maximum Operating Temperature Body and Cover Material Download
DC1-21U  1/4″ – 1″  Screwed
Rc & NPT
 10 bar / 145 psig  400°C Stainless Steel
SU2-32U/td>  1/4″ – 1″  Screwed
Rc & NPT
 10 bar / 145 psig  400°C Stainless Steel
UNC-W  1/4″ – 1″  Screwed
Rc & NPT
 10 bar / 145 psig  400°C Stainless Steel
Miyawaki DC1 Steam Trap