Shida Komusho Vacuum Safety Valve Replacement: Technical Information Required for Quotation
Updated: Sep 7
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Introduction
If you have an existing Shida Komusho Vacuum Safety Valve installed and need to replace it, Nichiboku can coordinate the technical review and quotation request from Japan.
To identify the appropriate replacement, please provide: (Shida Komusho Vacuum Safety Valve Replacement)
A copy of the original manufacturer’s drawing; and/or
The technical specification sheet of the existing valve
A clear photograph of the valve nameplate
The actual operating conditions shown below
Required quantity

Technical Information Required for Quotation
The values shown below are provided only as a reference example based on a Shida Komusho drawing. They should not be considered the required specifications for your application.
Technical Parameter | Reference Example | Your Application |
Set Pressure | −80 kPa(g) | |
Closing Pressure | −70 kPa(g) | |
Inlet Pressure | — | |
Outlet Pressure | — | |
Design Pressure | FV to 0.2 MPa(g)* | |
Design Temperature | 60°C | |
Fluid | Air + 80% Water Vapor | |
Required Capacity | 24 kg/h | |
Inlet Connection / Size | NPT 1″ / 25A | |
Outlet Connection / Size | — |
FV = Full Vacuum.
Quantity: ______ pcs
** Values shown in blue are for reference only and do not define the specifications required for your application.
Shida Komusho Vacuum Safety Valve Replacement
The end user should provide the actual operating conditions of the installed vacuum safety valve so that the manufacturer can review the requirement and determine the appropriate replacement configuration.
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