Yoshitake FV-2S is a straight type radiator valve designed for use with radiators in heating systems using steam. Featuring a packless bellows design, it operates totally free of leakage and utilizes a fluororesin disc for a complete close. The valve is versatile and usable for cold and hot water in addition to steam.

Features

• Totally free of leakage due to bellows packless type.
• Complete close with a fluororesin disc.
• Usable for not only steam but cold and hot water.

Specifications

Application	Steam (cold and hot water)
Maximum pressure	0.3 MPa
Maximum temperature	150°C
Material (Body)	Bronze
Material (Union)	Brass
Material (Valve disc)	Fluororesin
Connection	Inlet: JIS Rc screwed Outlet: JIS R screwed (union joint)

Dimensions and Weights

Nominal size	d	L1	L2	H1	H2	H3	H4	D	Weight (kg)
15A	1/2	65	35	28	101	17	95	15	0.6
20A	3/4	75	38	33	108	21	101	20	0.78
25A	1	86	42	38	117	25	109	25	1.02
32A	1-1/4	102	52	44	130	28	117	25	1.54

Note

The dimensions table extracts the Straight type weights (0.6 to 1.54 kg) from the shared FV-2 series catalog table. H3 and H4 dimensions correspond to the straight type profile.

Maximum Flow Rate Chart (For Steam)

Nominal size	0.05 MPa	0.1 MPa	0.15 MPa	0.2 MPa	0.25 MPa	0.3 MPa
15A	16	21	25	30	35	40
20A	28	36	44	52	60	71
25A	44	57	70	83	98	111
32A	64	84	103	122	142	161

Safety Factor

Since this table shows the maximum discharge (kg/h), set a sufficient safety factor when sizing the valve.

Parts and Materials

No.	Part Name	Material
15	Union Nut	Brass (C3771)
14	Union Nipple	Brass (C3771)
13	O Ring	EPDM
12	Set Screw	Rolled Steel (SS400)
11	Washer	Carbon Steel (SWRH)
10	Handle	Synthetic Resin
9	Spindle Grip	Phosphor Bronze (C5191)
8	Bellows	Phosphor Bronze (C5212)
7	Spindle	Brass (C3604)