Inverted bucket steam trap - ER116 | Miyawaki

Name: Inverted bucket steam trap - ER116 | Miyawaki specs & use
Brand: Miyawaki
SKU: Inverted bucket steam trap - ER116 | Miyawaki

Miyawaki ER116 – Inverted Bucket Steam Trap

The Miyawaki ER116 is a mechanical inverted bucket steam trap made from ductile cast iron FCD450, designed for medium to large condensate loads in steam networks. It employs a dual steam separation mechanism with a U-shaped duct and inverted bucket, allowing mechanical discharge without an external actuator.

Technical Specifications

Sizes: DN15–DN50 / 1/2"–2".
Connection: Flanged FF or RF.
Flange Standards: ASME/JPI 150 lb, ASME/JPI 300 lb, DIN PN16, JIS 10K / 16K / 20K.
Body Material: Ductile cast iron FCD450.
PMA: 1.6 MPa.
TMA / TMO: 300 °C.
PMO: ER116-7 at 0.7 MPa, ER116-16 at 1.6 MPa.
PED 2014/68/EU, Article 4, Section 3, without CE marking.

Operation and Selection

The valve opens when condensate reduces the buoyancy of the bucket and closes when steam enters the body. A small vent hole at the top of the bucket removes hot air and non-condensable gases, minimizing air locking and steam locking. The SCCV System involves a self-centering closing valve.

Applications

Suitable for heat exchangers, industrial processes, food processing, dyeing, cleaning facilities, and HVAC. It can be used in condensate recovery with backpressure up to 90% of upstream pressure, provided check valves and proper hydraulic layout are implemented.

Installation and Maintenance

Installation is in horizontal flow, with the nameplate on the top side and direction according to the body arrow. The steam trap should be placed lower than the condensate-producing equipment; if not feasible, a lift fitting is required. Maintenance space of over 200 mm is necessary, and line blow-off before startup is recommended.

FAQ

What is checked in reduced discharge?
Pressure above PMO, inadequate sizing, blocked vent hole, debris in piston/pilot valve, or clogged screen.

Standard (Options)

DIN
ANSI
JIS

Connection (Options)

Flanged

Material (Options)

Ductile Cast Iron

Pressure Rating (Options)

PN 16
0,7 - 1,6 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

Size	Dimensions (mm)				Dimensions (in)				Weight
	L	H1	H2	W	L	H1	H2	W	(kg)	(lb)
1/2”	300	230	132	190	11.8	9.1	5.2	7.48	19,0	41.8
3/4”
1”
1 1/4”		190	167			7.5	6.6		23,0	50.7
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)	(°C)	(°F)
ER116-7	Flanged FF,RF*	1/2"	0,7	100	0,7	100	300	572	Ductile cast iron FCD450
		3/4"
		1"
		1 1/4"
		1 1/2"
		2"
ER116-16		1/2"	1,6	230	1,6	230
		3/4"
		1"
		1 1/4"
		1 1/2"
		2"
ER116-16L		1/2"
		3/4"
		1"
		1 1/4"
		1 1/2"
		2"

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