Issue
Satchwell VSF or VJF Valve Body controlled by Satchwell Spring Return Actuator requires replacement.
Environment
Satchwell VSF or VJF Valve Body installed in Water or Steam Control Valve applications.
Cause
Obsolescence of Satchwell VSF or VJF Control Valve Body.
Resolution
STEAM APPLICATION
1. Replace Satchwell VSF or VJF Valve Body with S-E Two-Port Flanged Valve Body.
Where an existing Satchwell VSF or VJF Valve Body is utilised in a STEAM application, then the VSF or VJF Valve Body should be replaced by a suitably sized S-E VGS211F Valve Body, thus enabling steam having a steam inlet pressure up to 1300 kPa and a temperature up to 200 deg C to be controlled.
It should be noted however that the face-to-face dimension and overall dimensions of each S-E Valve Body will differ to those of the Satchwell VSF or VJF Valve Body.
It should also be noted that the operation of the VGS211F Valve Spindle is the reverse of that of the VSF or VJF Valve Spindle. When the VGS211F Valve Spindle is UP, or in the fully extended position, then the Valve is OPEN. Similarly, when the VGS211F Valve Spindle is DOWN, or in the fully retracted position, then the Valve is CLOSED
This will therefore result in the need to replace the existing Satchwell Actuator with the correct model of S-E M700 Actuator, in order to ensure the correct operation of the Valve Body in the event of electrical power failure.
It is important that the above limitations are recognised when replacing a Satchwell VSF or VJF Valve Body with a S-E VGS211F Valve Body in retrofit projects.
Such limitations do not apply to new projects where a new S-E VGS211F Valve Body and a new S-E M700 Actuator are being selected, providing of course that an Actuator having the correct spring action in the event of electrical power failure is selected.
N.B.
Steam Control Valves are normally required to CLOSE in the event of electrical power failure.
In the case of the S-E VGS211F therefore the S-E M700 SRSD Actuator should be selected.
WATER APPLICATION
1. Replace Satchwell VSF or VJF Valve Body with S-E Two-Port Flanged Valve Body.
A number of alternative models of S-E Two-Port Flanged Valve Bodies are available to replace existing Satchwell VSF or VJF Two-Port Flanged Valve Bodies.
It should be noted however that the face-to-face dimension and overall dimensions of each S-E Valve Body will differ to those of the Satchwell VSF or VJF Valve Body.
