The Yoshitake AL-32TML-N is a lever type closed safety relief valve featuring a complete stainless steel construction for wetted and trim parts (SCS14A and SUS316). It is specifically designed with a soft seat (FKM O-ring) ensuring highly reliable air tightness for applications where valve seat leakage is strictly not tolerated. Its closed structure effectively prevents fluid leakage, making it an excellent choice for a variety of fluid systems. The AL-32TML-N model is approved by JWWA and is tailored for cold and hot water applications.

Features

• Lever type safety valve: A discharge inspection can be manually performed when the difference between the set pressure is within specific tolerances.
• Excellent air tightness: Ensured by the valve seat incorporating a soft seat (O-ring).
• High corrosion resistance: All stainless steel (SCS14A and SUS316 for trim parts).
• Closed structure: Designed to prevent internal and external fluid leakage.

Required differential pressure at a discharge inspection

Nominal size	Difference between set pressure at a discharge inspection
15A-25A	1.0 MPa or less
32A, 40A	0.6 MPa or less
50A	0.4 MPa or less

Specifications

Model	AL-32TML	AL-32TML-N
Structure	Closed type with lever	Closed type with lever
Working pressure	Air, water, oil, other non-dangerous fluid	Cold and hot water
Pressure Range	0.05-1.0 MPa	0.05-1.0 MPa
Working temperature	5-120°C	5-100°C
Spring case	Stainless steel	Stainless steel
Valve	Stainless steel (SCS14A)	Stainless steel (SCS14A)
Valve seat	Stainless steel (SUS316)	Stainless steel (SUS316)
Adjusting spring	Stainless steel	Stainless steel
O-ring	Synthetic rubber (FKM)	Synthetic rubber (FKM)
Connection	JIS 10K loose flange	JIS 10K loose flange

INFO

The AL-32TML-N variant holds JWWA approval. For the AL-32TML model, please contact us when using for oil.

Dimension and Weights

TIP

The outlet flange is 1 size larger than the nominal size.

Nominal size	D	L	H1	H	Flow area (mm²)	Weight (kg)
15A	16	63	97	215	20.1	2.5
20A	21	87	101	217	34.6	2.9
25A	26	92	119	245	53.0	4.5
32A	33	99	135	284	93.3	5.3
40A	41	109	140	321	135.2	6.7
50A	51	114	162	372	208.2	11.5

Soft Seat Design

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

Discharge Capacity

AL-32 for steam (Saturated temperature)

<Pressure vessel structure standard> (kg/h)

Nominal size (mm) \ 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	15	20	29	40	50	60	70	80	90	100	109
20A	27	35	51	69	87	104	121	138	155	172	189
25A	42	54	78	105	133	159	186	212	237	263	289
32A	70	91	132	178	224	268	313	356	400	443	487
40A	105	136	198	266	335	402	468	534	599	664	729
50A	163	211	306	411	518	621	723	824	924	1025	1126

AL-32, 32T, 32TML for air (20°C)

<Pressure vessel structure standard> (kg/h)

Nominal size (mm) \ 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	25	33	48	65	81	98	114	131	147	164	181
20A	44	57	83	111	140	169	197	226	254	283	311
25A	67	87	127	171	215	258	302	346	390	433	477
32A	113	147	214	288	362	435	509	582	656	730	803
40A	169	221	321	431	542	652	762	872	982	1093	1203
50A	262	341	496	666	836	1006	1176	1346	1516	1687	1857

AL-32, 32T, 32T-N, 32ML, 32TML-N for water

<Yoshitake standard> (accumulation 25%) (m³/h)

Nominal size (mm) \ 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

Parts and Structure Drawing

No	Part Name	Material
6	C Ring	Stainless Steel
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 (SUS304)
14	Gasket	PTFE
15	Gasket	PTFE
16	Name Plate	Stainless Steel (SUS304)
17	Stub End	Stainless Steel (SUS316)
18	Lap Joint	Stainless Steel (SUS304)
19	Flange	Stainless Steel (SUS304)
20	Flange	Stainless Steel (SUS304)
21	Spring Pin	Stainless Steel (SUS)
22	Lever	Stainless Steel (SUS430)
23	Connecting Rod	Stainless Steel (SUS304)
24	O Ring	FKM
25	Spring Pin	Stainless Steel (SUS)
26	JWWA Label	PE