Structure; Operation - Yoshitake AL-32 Product Manual

AL-32T AL-32TML
Blowout operation
As the inlet pressure approaches the blowout pressure, the force of fluid pushing up the valve [3]
approaches the force of the spring [6] pressing down the valve [3]. The safety relief valve commences to
blow when the inlet pressure reaches around 3% below the blowout pressure.
The fluid accumulates gradually on the pressure groove [20] and when the fluid pressure reaches the
blowout pressure the valve [3] pops.
Closing operation
Since the inlet pressure of the safety relief valve decreases when the fluid is released into the atmosphere
by the pop action of valve [3], the force of fluid lift is lowered. At this point, the repelling force of the spring
[6] becomes larger than the force of fluid lift and thus the valve closes. In addition, while the safety relief
valve discharges, pressure of fluid entering into the back of the valve [3] (back pressure) adds to the closing
force.

4. Structure

AL-32ML, AL-32TML
Fig.2 Structure

5. Operation

3
No. Part name
1 Spring case
2 Valve seat
3 Valve
4 O-ring
5 Spindle
6 Spring
7 Bottom spring plate
8 Top spring plate
9 Adjusting screw
10 Lock nut
11 Cap
12 Gasket
13 Gasket
14 Name plate
15 Lever
16 Spring pin
17 O ring
18 Connecting rod
19 Spring pin
20 Pressure groove
■EPDT-322b■