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  6. Disk-type steam trap "S31N model"

Disk-type steam trap "S31N model"

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S Series

last updated:Jun 03, 2025

ミヤワキ
ミヤワキ
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Compact and affordable! But it also ensures a steady flow! Miyawaki's best-selling number one steam trap.

The disk-type steam trap is a trap that utilizes the thermodynamic properties of steam and condensate flowing into the trap to open and close the valve. 【Features】 1. Meets various needs! With a diameter range of 15A to 50A, capable of horizontal and vertical installation, and a maximum flow rate exceeding 2,000 kg/h (for sizes 32A to 50A), it is a versatile trap that is easy to adopt in any factory! 2. Automatic blow-off mechanism Equipped with a mechanism to quickly discharge condensate and air during the initial venting! 3. Easy maintenance! With fewer parts, maintenance is simple! For sizes 15A to 25A, just turning the cap makes disassembly easy!

    valve
S31N.png

Disk-type steam trap "S31N model"

S31N.png
S31N.png
  • Disk-type steam trap S31N model product details
  • Special site - Product/service details - https://pr.mono.ipros.com/miyawaki/product/

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basic information

Nominal diameter: 15A/20A/25A/32A/40A/50A Maximum operating pressure: 1.6MPa Maximum operating temperature: 220℃ Body material: 15A to 25A ⇒ FCD450 (ductile cast iron) 32A to 50A ⇒ FC250 (cast iron) Connection: threaded, flange

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Applications/Examples of results

Steam transport pipe Small steam equipment, etc.

Detailed information

  • S31NF_Rc_FF.png

    This is the emission flow diagram of S31N.

  • S31N_RC_15-25.png

    This is the dimensional diagram for S31NF (15A to 25A). The face-to-face distance for 15A/20A is 90mm, and for 25A it is 95mm. For the flange type, it is 140mm for 15A, 150mm for 20A, and 160mm for 25A.

  • S31N_RC_32.png

    This is the dimensional diagram of S31NF (32A to 50A). The distance between the threaded surfaces is 180mm, and the distance between the flange surfaces is 240mm.

Company information

ミヤワキ

ミヤワキ

Machine elements and parts

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Miyawaki is a long-established specialized manufacturer of steam system-related products, including steam traps, with a history of over 90 years. Our products have been used in oil refining, chemical plants, food factories, and more. To meet the diverse needs of our customers, we offer a wide variety of products. We also accept special specifications tailored to existing steam systems, so please feel free to contact us.

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