Yoshitake FS-B is a ball-type sight glass designed for visually checking fluid flow via the movement of the internal ball. It is suitable for cold and hot water applications, supporting a maximum working pressure of 0.7 MPa and a maximum temperature of 60℃. The product is available with ductile cast iron or stainless steel bodies, featuring hardened glass and a polypropylene ball, with both JIS Rc screwed and JIS 10K FF flanged connection options.

Features

Fluid flow can be checked by the movement of the ball inside the product. The FS-B family includes various configurations such as plain, flap, stainless, mica plate, ball, protective wire mesh, and spinner.

Specifications

Item	Description 1	Description 2	Description 3	Description 4
Application	Cold and hot water
Maximum working pressure	0.7 MPa
Max. temperature	60℃
Body Material	Ductile cast iron	Ductile cast iron	Stainless steel	Stainless steel
Glass Material	Hardened glass	Hardened glass	Hardened glass	Hardened glass
Ball Material	Polypropylene	Polypropylene	Polypropylene	Polypropylene
Nominal size	10-50A	10-80A	10-40A	10-80A
Connection	JIS Rc screwed	JIS 10K FF flanged	JIS Rc screwed	JIS 10K FF flanged

Dimensions (mm) and Weights (kg)

Screwed type

Nominal size	L	H	S	P	Weight
10A	100	74	40	71	0.9
15A	100	74	40	71	1.0
20A	110	92	46	78	1.4
25A	120	94	52	84	1.8
32A	150	132	70	110	4.0
40A	150	132	70	110	4.0
50A	160	142	70	110	7.5

Flanged type

Nominal size	C	D	H	S	P	L	Weight
10A	65	90	80(82)	40	80	160	3.0
15A	70	95	80(82)	40	80	160	3.0
20A	75	100	100	46	88	180	3.9
25A	90	125	102	52	96	180	5.4
32A	100	135	140	75	120	180	8.0
40A	105	140	140	75	120	180(200)	8.0
50A	120	155	150	...	...	...	...

INFO

• The values in parentheses are the dimensions of stainless steel made.