The Yoshitake AL-10 is a compact and lightweight lift type safety valve designed for steam applications. It features an open type structure with a ductile cast iron spring case and is available with a bronze or stainless steel valve and valve seat. The AL-10 supports a working pressure range of 0.05 to 1.0 MPa and a maximum operating temperature of 220℃.

Features

1. Compact and lightweight lift safety valve, installation is easy.
2. Due to lift valve lever mechanism a discharge inspection can be manually performed at more than 75% of the opening pressure (open type with a lever).

Open type with a lever

Open type without a lever

Specifications

Structure	Open type
Application	Steam
Working pressure	0.05-1.0 MPa
Maximum temperature	220℃
Material (Spring case)	Ductile cast iron
Material (Valve, valve seat)	Bronze or stainless steel
Connection	JIS Rc screwed

Set Pressure

Please refer to the chart in P.3-80 of the original catalog for set pressure range.

Dimensions and Weights

Nominal size	d	L (mm)	H1 (mm)	H (With Lever) (mm)	H (Without Lever) (mm)	D (mm)	Flow area πDe (mm²)	Weight (kg)
15A	Rc 1/2	40	40	154	142	16	20.1	1.0
20A	Rc 3/4	45	50	173	161	21	34.6	1.5
25A	Rc 1	50	60	193	181	26	53.0	1.8
32A	Rc 1-1/4	60	70	232	219	33	85.5	3.1
40A	Rc 1-1/2	65	75	250	237	41	132.0	4.5
50A	Rc 2	80	85	284	271	51	204.2	6.2

Certified Capacity Table for AL-10

For steam (saturation temperature) (Pressure vessel structure standard)

Pressure MPa / Nominal size	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	67	87	127	170	215	257	300	342	383	425	467
40A	104	135	196	263	332	397	463	528	592	656	721
50A	161	209	303	407	513	615	716	817	916	1016	1116
(Unit: kg/h)

Nominal Size Selection

Please refer to P.3-12 of the original catalog for the calculation procedure for nominal size selection.

Construction and Parts (With Lever)

No.	Name of Parts	Material
1	Spring Case	Ductile Cast Iron (FCD450)
2	Valve Case	Ductile Cast Iron (FCD450)
3	Cap	Bronze (CAC406)
4	Valve	Bronze (CAC406)
5	Valve Seat	Bronze (CAC406C or CAC406)
6	Seat Ring	Bronze or Brass (CAC406C or C3771 or C3604)
7	Spindle	Brass (C3604)
8	Spring Washer	Brass (C3604)
9	Spring Washer	Brass (C3604)
10	Spring	Piano Wire or Alloy Steel
11	Adjusting Screw	Brass (C3604)
12	Lock Nut	Brass (C3604)
13	Set Screw	Steel
14	Lock Nut	Steel
15	Lever	Bronze (CAC406)
16	Lever Pin	Brass (C3604)
18	Set Screw	Steel
19	Spindle Ring	Brass (C3604)
20	Spindle Nut	Steel or Brass
21	Name Plate	Stainless Steel (SUS304)

Construction and Parts (Without Lever)

No.	Name of Parts	Material
1	Spring Case	Ductile Cast Iron (FCD450)
2	Valve Case	Ductile Cast Iron (FCD450)
3	Cap	Brass or Cast Iron (C3604 or FC200)
4	Valve	Cast Stainless Steel (SCS14A)
5	Valve Seat	Cast Stainless Steel or Stainless Steel (SCS13 or SUS304)
6	Seat Ring	Bronze or Brass (CAC406C or C3771 or C3604)
7	Spindle	Brass (C3604)
8	Spring Washer	Brass (C3604)
9	Spring Washer	Brass (C3604)
10	Spring	Piano Wire or Alloy Steel
11	Adjusting Screw	Brass (C3604)
12	Lock Nut	Brass (C3604)
13	Set Screw	Steel
14	Lock Nut	Steel
15	Name Plate	Stainless Steel (SUS304)

At the Time of Ordering

When ordering, please specify with or without lever and the material of the valve body and valve seat in addition to the set pressure.