Miyawaki DF1 Diaphragm Steam Traps

Manufacturer: MIYAWAKI Inc.
Model: DF1

Features

Compact design
Can be installed in small spaces.

No steam leaks
Operates below saturation temperature, resulting in no steam leaks and great energy saving performance.

Easy maintenance
Less components make maintenance and inspection easy.

Typical applications

Suitable for foodstuff devices, bio devices, compact heat exchangers, tank heating, main heat pipes, steam tracing, cleaning devices, and other such applications.

Dimensions/Weight

Screwed

DF1

Connections	Size	Dimensions (mm)				Dimensions (in)				Weight
		L	H1	H2	W	L	H1	H2	W	(kg)	(lb)
Rc,NPT	1/2”	85	36	18	62	3.4	1.4	0.7	2.4	1,0	2.2
	3/4”	100	40	23		3.9	1.6	0.9		1,2	2.6
	1”

Flanged

Connections	Size	Dimensions (mm)				Dimensions (in)				Weight
		L	H1	H2	W	L	H1	H2	W	(kg)	(lb)
JIS,ASME 150,300 lb	1/2”	175	36	18	62	6.9	1.4	0.7	2.4	2,3	5.0
	3/4”	195	40	23		7.7	1.6	0.9		3,6	7.9
	1”	215				8.5				4,3	9.5
Connections	Size	Dimensions (mm)				Dimensions (in)				Weight
		L	H1	H2	W	L	H1	H2	W	(kg)	(lb)
DIN PN40	DN15	150	36	18	62	5.9	1.4	0.7	2.4	2,3	5.0
	DN20									3,6	7.9
	DN25	160				6.3				4,3	9.5

*Customized face-to-face dimensions on request.
*Please contact MIYAWAKI for further information.

Socket Weld

Connections	Size	Dimensions (mm)				Dimensions (in)				Weight
		L	H1	H2	W	L	H1	H2	W	(kg)	(lb)
JIS,ASME,DIN	1/2”	160	36	18	62	6.3	1.4	0.7	2.4	1,4	3.1
	3/4”
	1”

Specifications

Model	Connection		Max. operating pressure		Max. operating pressure differential		Max. operating temperature		Valve opening temperature		Body material
	Type	Size	(MPa)	(psig)	(MPa)	(psig)	(℃)	(℉)	(℃)	(℉)
DF1-21H	Screwed Rc,NPT	1/2”	2,1	305	2,1	305	235	455	5℃ below saturation temperature	9℉ below saturation temperature	Forged steel A105
		3/4”
		1”
DF1-21HF	Flanged FF,RF*	1/2”
		3/4”
		1”
DF1-21HW	Socket Weld SW	1/2”
		3/4”
		1”
DF1-21L	Screwed Rc,NPT	1/2”	2,1	305	2,1	305	235	455	15℃ below saturation temperature	27℉ below saturation temperature	Forged steel A105
		3/4”
		1”
DF1-21LF	Flanged FF,RF*	1/2”
		3/4”
		1”
DF1-21LW	Socket Weld SW	1/2”
		3/4”
		1”

*Available flange standards: ASME/JPI 150lb, 300lb, DIN PN40, JIS 10K, 16K, 20K

Discharge Capacity

The condensate flow rate shown assumes a condensate temperature at approximately 10℃ (18℉) for a DF1-21H and 20℃ (minus 36℉) for a DF1-21L below saturation temperature.