Inverted bucket steam trap - ESH8N | Miyawaki
Inverted bucket steam trap - ESH8N | Miyawaki

Inverted bucket steam trap - ESH8N | Miyawaki

The Inverted Bucket Steam Trap ESH8N by Miyawaki is a reliable and efficient steam trap designed for industrial applications. Utilizing the inverted bucket mechanism, it effectively discharges condensate while preventing steam loss, ensuring optimal energy efficiency. The ESH8N model is known for its durability and robust construction, making it suitable for high-pressure and high-temperature environments. Its design minimizes maintenance needs and provides consistent performance, making it a preferred choice for steam management systems.
Standard (Options)
  • DIN
  • ANSI
  • JIS
Connection (Options)
  • BSP
  • NPT
  • Flanged
  • Socket Weld
Material (Options)
  • Cast Steel
Pressure Rating (Options)
  • 2,1 - 4,4 Mpa

Description

1978 Received the Award for Excellence in Energy Saving

Features

No condensate logging on primary side

Intermittent or continuous discharge depending on condensate loads means no condensate stacking up on the primary side.

Easy maintenance

For quick and easy maintenance, this model can be repaired directly in line.

Complete steam containment

A double steam separation mechanism (implemented with a U-shaped duct and inverted bucket) provides reliable steam separation and ensures trap tightness.

Superb durability

Offers superb durability thanks to the SCCV System valve and robust super lever, as well as stainless steel internal components.

Condensate recovery

With its high degree of back pressure tolerance, this model supports condensate recovery at pressures up to 90% of the upstream pressure.

Free from steam and air locking

This model is free from steam and air locking due to a small air vent hole in the top of the bucket (discharges hot air and non-condensable gases).

*’SCCV System’ is an abbreviation of Self Closing and Centering Valve System.

Typical applications

Suitable for use in a wide range of fields including the plant industry, foodstuff manufacturing, dyeing, cleaning, and air conditioning.

Dimensions/Weight

Screwed

Size (”)Dimensions (mm)Dimensions (in)Weight
LH1H2WLH1H2W(kg)(lb)
1/2”2201141111478.74.54.45.711,024.2
3/4”
1”2248.8

Socket Weld

Size (”)Dimensions (mm)Dimensions (in)Weight
LH1H2WLH1H2W(kg)(lb)
1/2”2201141111468.74.54.45.711,024.2
3/4”
1”

Flanged

Size(")Dimensions(mm)Dimensions(in)
LH1H2WLH1H2W
1/2"2501141111469.84.54.45.7
3/4"
1"
Size(")Weight(kg)Weight(lb)
JIS(FF,RF)JIS(RF)ASME/JPI(RF)DINJIS(FF,RF)JIS(RF)ASME/JPI(RF)DIN
10K,16K20K30K40K150lb300lb600lbPN40PN10010K,16K20K30K40K150lb300lb600lbPN40PN100
1/2"11,011,012,412,811,412,112,111,312,224.224.227.328.225.126.626.624.926.9
3/4"12,412,413,714,011,812,813,212,915,027.327.330.230.826.028.229.128.433.0
1"13,213,614,615,012,413,614,015,018,329.129.932.133.027.329.930.833.040.3

*Available flange standards: ASME/JPI, DIN, JIS

*Customized face-to-face dimensions on request.

Specifications

ModelConnection

Max. operating

pressure

Max. operating

pressure differential

Max. operating

temperature

Body material
TypeSize(MPa)(psig)(MPa)(psig)TMO(℃)TMO(℉)
ESH8N-21

Screwed

Rc,NPT

1/2”2,13052,1305400752

Cast steel

SCPH2/WCB

3/4”
1”
ESH8N-451/2”4,46404,4640
3/4”
1”
ESH8NF-21

Flanged

FF,RF

1/2”2,13052,1305
3/4”
1”
ESH8NF-451/2”4,46404,4640
3/4”
1”
ESH8NW-21

Socket Weld

SW

1/2”2,13052,1305
3/4”
1”
ESH8NW-451/2”4,46404,4640
3/4”
1”

●ESH8N-21 PMA: 4,4MPa (640psig), TMA: 400℃ (752℉), PMO: 2,1MPa (305psig), TMO: 400℃ (752℉)

●ESH8N-45 PMA: 4,4MPa (640psig), TMA: 400℃ (752℉), PMO: 4,4MPa (640psig), TMO: 400℃ (752℉)

*Available flange standards: ASME/JPI, DIN, JIS

*Customized size for 1-1/4”, 1-1/2” and 2” on request.

*Please contact MIYAWAKI for further information.

Discharge Capacity

Installation Examples

●To keep the drawing simple, bypass lines, valves, and other required equipment are not displayed. 

●If you wish to recover condensate, attach a check valve (CV model) and shut off valve on the trap’s outlet side.