The Yoshitake AL-140T-N is a closed-type safety relief valve constructed entirely of stainless steel. It is designed to offer high corrosion resistance and durability, making it suitable for cold and hot water applications. A key feature of this model is its soft seat (FKM O-ring) incorporated into the trim parts, which ensures excellent airtightness. It is highly recommended for systems where valve seat leakage is not tolerated, and it holds JWWA approval.

Features

• Safety relief valve made of all stainless steel, offering high corrosion resistance and durability in particular.
• Excellent airtightness ensured by the valve seat incorporating a soft seat. Most suitable for applications where valve seat leakage is not tolerated.
• Closed structure prevents fluid leakage to the outside.

Note

Please contact us when using the AL-140T for oil. The AL-140TML is recommended for hot and cold water applications instead of AL-140T, but AL-140T-N is explicitly designed for cold and hot water.

Specifications

Model	AL-140T-N	AL-140T
Structure	Closed type	Closed type
Application	Cold and hot water	Air, Cold and hot water, Oil, Other non-dangerous fluids
Working pressure	0.05-1.0 MPa	0.05-1.0 MPa
Working temperature	5-100℃	5-120℃
Material (Spring case)	Stainless steel	Stainless steel
Material (Valve, valve seat)	Stainless steel (SCS14A)	Stainless steel (SCS14A)
Material (Adjusting spring)	Stainless steel	Stainless steel
Material (O-ring)	FKM	FKM
Connection	JIS Rc screwed	JIS Rc screwed

Dimensions and Weights

Nominal size	d	D (mm)	L (mm)	H1 (mm)	H (mm)	Flow area πDe (mm²)	Weight (kg)
15A	Rc 1/2	16	34	40	128	20.1	0.7
20A	Rc 3/4	21	38	42	128.5	34.6	0.8
25A	Rc 1	26	43	51	148	53.0	1.1
32A	Rc 1-1/4	33	50	61.5	181.5	93.3	1.8
40A	Rc 1-1/2	41	60	64	205	135.2	2.8
50A	Rc 2	51	75	76	245.5	208.2	4.7

Soft Seat Type

Soft seat (O-ring) is used for the trim parts, ensuring the reliable airtightness of the valve seat.

JWWA approval applies to the AL-140T-N model: