Inverted bucket steam trap - ER105 | Miyawaki

Name: Inverted bucket steam trap - ER105 | Miyawaki
Brand: Miyawaki
SKU: Inverted bucket steam trap - ER105 | Miyawaki

Miyawaki ER105 – Inverted Bucket Steam Trap

The Miyawaki ER105 is an inverted bucket steam trap made from cast iron FC250, designed for condensate drainage in low-pressure steam systems. It is intended for applications requiring mechanical operation without electrical or pneumatic actuators and offers on-line repairability.

Technical Specifications

Versions: ER105-3 / ER105-7 and ER105F-3 / ER105F-7.
Threaded connections: Rc or NPT, sizes 3/4"–1 1/2".
Flanged connections: FF or RF, sizes 1/2"–2".
Available flange standards: ASME/JPI 150 lb, ASME/JPI 300 lb, DIN PN16, JIS 10K / 16K / 20K.
Maximum operating pressure: 0.3 MPa or 0.7 MPa, depending on version.
Maximum differential pressure: 0.3 MPa or 0.7 MPa.
Maximum operating temperature: 220 °C.
Body material: cast iron FC250.

Operation

The inverted bucket mechanically operates the valve based on the presence of steam or condensate within the body. The U-shaped duct acts as an additional steam separator, while the vent hole at the top of the bucket removes hot air and non-condensable gases, minimizing steam locking and air locking phenomena.

Applications

Suitable for industrial plants, food processing facilities, dyeing operations, cleaning processes, HVAC, and general low-pressure steam drainage. The series can be used in condensate recovery lines with backpressure up to 90% of upstream pressure, provided proper check and isolation are implemented at the outlet.

Selection and Maintenance

Selection is based on condensate load, available Δp, backpressure, temperature, DN, and connection type. The SCCV System, stainless steel internals, and on-line repairability reduce service intervention time. Maintenance involves checking the seat, valve, bucket, lever, vent hole, and gaskets.

Standard (Options)

DIN
ANSI
JIS

Connection (Options)

BSP
Flanged

Material (Options)

Cast Iron

Pressure Rating (Options)

0,3 - 0,7 Mpa

Description

1978 Received the Award for Excellence in Energy Saving

Features

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.

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).

Easy maintenance

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

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.

*’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
	L	H1	H2	W	L	H1	H2	W	(kg)	(lb)
3/4”	190	155	134	120	7.5	6.1	5.3	4.7	10,2	22.5
1”
1 1/4”
1 1/2”

Flanged

Size	Dimensions (mm)				Dimensions (in)				Weight
	L	H1	H2	W	L	H1	H2	W	(kg)	(lb)
1/2”	254	155	134	120	10	6.1	5.3	4.7	13,6	29.9
3/4”
1”
1 1/4”	260				10.2				15,1	33.2
1 1/2”
2”

Specifications

Model	Connection		Max. operating pressure		Max. operating pressure differential		Max. operating temperature		Body material
	Type	Size	(MPa)	(psig)	(MPa)	(psig)	(℃)	(℉)
ER105-3	Screwed Rc,NPT	3/4”	0,3	43	0,3	43	220	428	Cast iron FC250
		1”
		1 1/4”
		1 1/2”
ER105-7		3/4”	0,7	100	0,7	100
		1”
		1 1/4”
		1 1/2”
ER105F-3	Flanged FF,RF*	1/2”	0,3	43	0,3	43
		3/4”
		1”
		1 1/4”
		1 1/2”
		2”
ER105F-7		1/2”	0,7	100	0,7	100
		3/4”
		1”
		1 1/4”
		1 1/2”
		2”

*Available flange standards: ASME/JPI 150lb, 300lb, DIN PN16, JIS 10K, 16K, 20K