Yoshitake AL-140TML-N is a stainless steel closed type safety relief valve equipped with a manual testing lever. It features a lift-type design and is specifically engineered for cold and hot water applications. Certified with JWWA approval, this safety valve ensures reliable non-leakage performance by incorporating a soft seat (FKM O-ring) in the trim parts, making it highly suitable for installations where valve seat leakage is strictly prohibited. The all-stainless steel construction utilizes SCS14A (equivalent to SUS316) for trim components to provide exceptional corrosion resistance, while the closed structure effectively prevents fluid leakage to the external environment.

INFO

A discharge inspection can be manually performed when the difference between the set pressure and the inlet pressure meets the required differential pressure conditions.

Features

1. Lever type safety relief valve. A discharge inspection can be manually performed when the difference between the set pressure and the inlet pressure is as shown in the required differential pressure table.
2. Excellent airtightness ensured by the valve seat incorporating a soft seat. Most suitable for applications where valve seat leakage is not tolerated.
3. Safety relief valve of all stainless steel made. Used for trim parts is SCS14A (equivalent to SUS316) with outstanding corrosion resistance.
4. Closed structure prevents fluid leakage.

Required differential pressure at a discharge inspection

Nominal size	Difference between set pressure and inlet pressure
15A-25A	1.0 MPa or less
32A, 40A	0.6 MPa or less
50A	0.4 MPa or less

Specifications

Model	AL-140TML-N
Structure	Closed type with a lever
Application	Cold and hot water
Working pressure	0.05-1.0 MPa
Working temperature	5-100°C
Spring case Material	Stainless steel
Valve, valve seat Material	Stainless steel (SCS14A)
Adjusting spring Material	Stainless steel
O-ring Material	FKM
Connection	JIS Rc screwed

TIP

Please refer to the manufacturer's chart for the set pressure range calculation procedure for nominal size selection.

Dimensions and Weights

Nominal size	d (Dimension)	D (Dimension mm)	L (Dimension mm)	H1 (Dimension mm)	H (Dimension mm)	Flow area πDℓ (mm²)	Weight (kg)
15A	Rc 1/2	16	34	40	158	20.1	0.8
20A	Rc 3/4	21	38	42	158	34.6	0.9
25A	Rc 1	26	43	51	177	53.0	1.3
32A	Rc 1-1/4	33	50	61.5	211	93.3	1.9
40A	Rc 1-1/2	41	60	64	246	135.2	3.0
50A	Rc 2	51	75	76	286	208.2	4.9

Certified Capacity Table (Water)

Capacity for AL-140TML-N for water (accumulation 25%) according to Yoshitake standard (m³/h):

Nominal size \ Pressure MPa	0.05	0.1	0.2	0.3	0.4	0.5	0.6	0.7	0.8	0.9	1.0
15A	0.4	0.5	0.9	1.1	1.3	1.5	1.6	1.8	1.9	2.0	2.1
20A	0.6	0.9	1.6	2.0	2.3	2.6	2.8	3.1	3.3	3.5	3.7
25A	1.0	1.5	2.5	3.1	3.6	4.0	4.4	4.7	5.1	5.4	5.7
32A	1.8	2.6	4.5	5.5	6.3	7.1	7.8	8.4	9.0	9.5	10.0
40A	2.7	3.8	6.5	7.9	9.2	10.3	11.3	12.2	13.0	13.8	14.6
50A	4.1	5.9	10.0	12.3	14.2	15.9	17.4	18.8	20.1	21.3	22.4

Structural Drawing and Parts List

No.	Part Name	Material
2	Valve Seat	Cast Stainless Steel (SCS14A)
3	Valve	Cast Stainless Steel (SCS14A)
4	Valve Cover	Stainless Steel (SUS304)
5	O Ring	FKM
6	C Ring	Stainless Steel (SUS)
7	Spindle	Stainless Steel (SUS304)
8	Spring	Stainless Steel (SUS304)
9	Bottom Spring Plate	Stainless Steel (SUS)
10	Top Spring Plate	Stainless Steel (SUS)
11	Adjusting Screw	Stainless Steel (SUS)
12	Lock Nut	Stainless Steel (SUS)
13	Cap	Stainless Steel (SUS)
14	Gasket	PTFE
15	Gasket	PTFE
16	Name Plate	Stainless Steel (SUS304)
17	Spring Pin	Stainless Steel (SUS)
18	Lever	Stainless Steel (SUS430)
19	Connecting Rod	Stainless Steel (SUS304)
20	O Ring	FKM
21	Spring Pin	Stainless Steel (SUS)
22	JWWA Label	Polyester (PE)