Fushiman A.W. type pressure reducing valve

Manufacturer: Fushiman Co.,LTD.
Model: A.W.

Model	Nominal Diameter	Primary Pressure	Secondary Side Setting Range	Maximum Operating Temperature	Body Material	Connection
A.W.	15〜50	MAX. 2.0MPa	0.03 to 1.6 MPa	220℃	FC, SCPH, SCS	Flanges

Simple-structured direct-acting pressure reducing valve.
Few failures and long lifespan.
When the diaphragm is made of stainless steel, it can be used for steam, gas, and liquid.

Specifications and Materials

Pressure MPa		Temperature ℃	Fluid	Main Component Materials					Pipe Connection
Primary Side	Secondary Side Setting Range (¹)			Valve Body	Spring Protection Tube	Lower Cover	Valve & Valve Seat	Diaphragm
1.0 MPa or less	（Standard Pressure） 0.03 〜0.055 0.055〜0.085 0.085〜0.13 0.13 〜0.2 0.2 〜0.3 (Medium Pressure） 0.30 〜0.45 0.45 〜0.7 0.7 〜1.0 （High Pressure） 1.0 〜1.6	0〜60C）(¹)	Air, water, and other non-corrosive gases and liquids	Cast Iron	Cast Iron	Cast Iron	Stainless Steel	Synthetic Rubber (¹)	Flange JIS 10K Full Face
2.0 MPa or less				Cast Steel		Carbon Steel			Flange JIS 20K Flat Face
				Stainless Steel, Cast Steel		Stainless Steel
1.0 MPa or less		0〜220	Steam and other non-corrosive gases and liquids	Cast Iron		Cast Iron		Stainless Steel	Flange JIS 10K Full Face
2.0 MPa or less				Cast Steel		Carbon Steel			Flange JIS 20K Flat Face
				Stainless Steel, Cast Steel		Stainless Steel

Notes:
(¹) If the diaphragm is made of synthetic rubber, the set pressure must be 1.0 MPa or less.
(²) Products for temperatures exceeding 60°C and up to 110°C are also available.
Remarks:
ASME Class 150 and 300 products are also available.

Performance

Offset	10–20% of the maximum set pressure
Valve Seat Leakage	0.5% or less of the rated flow rate
Pressure Reduction Ratio	10:1 or less

Cv Value

Diaphragm Material	Nominal Diameter	Secondary Side Setting Range (MPa)
		0.03 〜0.055	0.055〜0.085	0.085〜0.13	0.13 〜0.2	0.2 〜0.3	0.3 〜0.45	0.45 〜0.7	0.7 and above
		Cv (Varies depending on the set pressure range)
Synthetic Rubber	15	0.40	0.78	1.30	1.71	1.55	1.74	1.75	1.75
	20	0.42	0.82	1.38	2.11	1.79	2.20	2.28	2.28
	25	0.42	0.82	1.38	2.14	1.82	2.23	2.28	2.28
	40	0.70	1.34	2.23	3.88	2.72	3.70	3.36	3.36
	50	0.79	1.50	2.52	4.44	3.65	5.35	5.12	5.12
Stainless Steel	15	0.08	0.15	0.24	0.78	0.96	0.96	1.08	1.08
	20	0.09	0.17	0.28	0.79	1.02	1.02	1.11	1.11
	25	0.09	0.17	0.28	0.80	1.02	1.02	1.11	1.11
	40	0.21	0.41	0.66	1.49	1.58	1.64	2.20	2.20
	50	0.35	0.69	1.10	1.88	2.09	2.09	2.20	2.20

Remarks: If the offset is 20% or less of the maximum set pressure, the Cv value will be twice the values in the above table. Please refer to page 280 for Cv calculations.

Structure and Dimensions

Dimensions and Weight

Material / Flange Standard	Nominal Diameter (mm)	L (mm)	H₁ (mm)	H₂ (mm)	E (mm)	Weight (kg)
Cast Iron (JIS 10K)	15	186	89	320	225
	20	190	89	320		25
	25	190	89	320		28
	40	230	113	328		38
	50	250	127	336		40
Cast Steel / Stainless Steel (JIS 20K)	15	182	93	320	225	27
	20	186	93	320		27
	25	186	93	320		30
	40	226	117	328		40
	50	246	131	336		45