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Overview
Suited for installation on steam boilers, various pressure vessels, instrumentation apparatus, and the
secondary side of pressure reducing valves. Yoshitake’s Safety Relief Valves prevent accidents due to
the abnormal rise in piping pressure.
1. Features
(1) The product is designed according to JIS B 8210 for spring loaded safety relief valves for
steam boilers and gas pressure vessels.
(2) The sealed structure of model AF-7M prevents any external leakage of fluid during operation.
2. Specifications
Model
AF-7
AF-7M
Type
Open lever type
*
1
Enclosed type
*
2
Fluids
Steam, air, and other
non-corrosive gases
Air and other non-corrosive gases
Pressure range
0.1 ~ 1.0 MPa
Temperature range
5 ~ 350
℃
5 ~ 300
℃
Super imposed back pressure
0 MPa
Connections
Inlet: JIS 10K RF flange or JIS 20K RF flange (JIS B 2238)
Outlet: JIS 10K FF flange (JIS B 2238)
Size (mm)
25, 40, 50, 65, 80, 100
Body
Carbon steel casting
Material
Valve & valve seat
Stainless steel
*
1
A safety valve which is so constructed that a part of the fluid blown off from the valve seat
opening is also discharged outside from other part than the valve outlet.
*
2
A safety valve which is so constructed that the fluid blown off from the valve seat opening
is not allowed to discharge outside from other part than the valve outlet.
Warnings
(1) Do not use this product on equipment and apparatus that do not allow any valve seat leakage.
＊
This product has valve seat leakage within tolerance, and cannot be sealed completely
(Zero valve seat leakage cannot be obtained).
This product cannot be used for apparatus and facilities with considerable vibration.
＊
Vibration may cause the product to make errors.
Cautions
Please confirm that the indications on the product name plate coincide with the specifications of
the ordered product model before usage.
＊
In case they do not coincide, do not use the product and contact us.