Yoshitake AL-150H is a lift type, closed type safety relief valve. It is designed for applications involving steam, air, cold and hot water, oil, and other non-dangerous fluids. The setting pressure range is 1.0 to 1.6 MPa. The valve trim (valve and valve seat) is made of SCS14A (equivalent to SUS316) cast stainless steel, providing outstanding corrosion resistance. The closed structure prevents fluid leakage to the outside.

Features

• Quick pop-up structure ensures reliable pressure relief.
• Used for the trim parts is SCS14A (equivalent to SUS316) with outstanding corrosion resistance.
• Simple internal structure facilitates easy adjustment, maintenance, and operation.
• Closed structure prevents fluid leakage to outside.
• Setting pressure is available to MAX 1.6 MPa.

Specifications

Structure	Closed type
Application	Steam, Air, Cold and hot water, Oil, Other non-dangerous fluids
Working pressure	1.0 - 1.6 MPa
Maximum temperature	220°C *
Spring case material	Bronze / Cast bronze
Valve, valve seat material	Stainless steel (SCS14A)
Connection	JIS Rc screwed

• The maximum temperature is 150°C when using for water, oil, or other liquids.

Dimensions and Weights

Nominal size	di × D × do	L	H1	H	Flow area $\pi D\ell$ (mm²)	Weight (kg)
15A	Rc 1/2 × 16 × Rc 3/4	36	42	126	22.9	0.8
20A	Rc 3/4 × 21 × Rc 1	38	47	131	39.5	0.9
25A	Rc 1 × 26 × Rc 1-1/4	46	55.5	147.5	60.6	1.3
32A	Rc 1-1/4 × 33 × Rc 1-1/2	54	61.5	167.5	97.7	1.9
40A	Rc 1-1/2 × 41 × Rc 2	63	67	193.5	150.8	2.9
50A	Rc 2 × 51 × Rc 2-1/2	77	80	241.5	233.4	5.0

• Screwed connection size of the outlet side is 1 size larger than the nominal size.

Structure and Materials

No	Name of Parts	Material
1	Spring Case	Bronze (CAC406)
2	Valve Seat	Cast Stainless Steel (SCS14A)
3	Valve	Cast Stainless Steel (SCS14A)
4	Spindle	Stainless Steel (SUS303)
5	Spring	Alloy Steel (SWOSC or SWOCV)
6	Bottom Spring Plate	Stainless Steel (SUS304 or SUS303)
7	Top Spring Plate	Stainless Steel (SUS304 or SUS303)
8	Adjusting Screw	Brass (C3604)
9	Lock Nut	Brass (C3604)
10	Cap	Brass (C3604)
11	Gasket	PTFE
12	Gasket	PTFE
13	Name Plate	Stainless Steel (SUS304)

Certified Capacity Table (AL-150H)

For Steam (Saturation Temperature)

(kg/h)

Nominal size \ Pressure MPa	1.0	1.1	1.2	1.3	1.4	1.5	1.6
15A	115	126	136	146	156	167	177
20A	199	217	235	252	270	288	306
25A	306	333	360	387	415	442	469
32A	493	537	581	625	669	713	757
40A	761	830	897	965	1033	1100	1168
50A	1179	1284	1389	1494	1599	1703	1808

For Air (20°C)

(kg/h)

Nominal size \ Pressure MPa	1.0	1.1	1.2	1.3	1.4	1.5	1.6
15A	190	208	225	243	260	278	295
20A	328	359	389	419	449	479	509
25A	504	550	597	643	689	735	782
32A	813	888	962	1037	1111	1186	1260
40A	1255	1370	1485	1600	1715	1831	1946
50A	1943	2121	2299	2477	2655	2833	3011

For Water (Accumulation: 25%)

(m³/h)

Nominal size \ Pressure MPa	1.0	1.1	1.2	1.3	1.4	1.5	1.6
15A	2.4	2.5	2.7	2.8	2.9	3.0	3.1
20A	4.2	4.4	4.6	4.8	5.0	5.2	5.3
25A	6.5	6.8	7.1	7.4	7.7	8.0	8.2
32A	10.5	11.0	11.5	12.0	12.4	12.9	13.3
40A	16.2	17.0	17.8	18.5	19.2	19.9	20.6
50A	25.2	26.4	27.6	28.7	29.8	30.8	31.8

WARNING

• The product has allowable valve seat leakage and does not close completely (valve seat leakage cannot be zero).
• Do not apply the product to devices which do not allow any valve seat leakage.
• Do not use the product for equipment or device which vibrates excessively.
• Do not adjust or change the set pressure.