What Process Date Is Required To Size A Control Valve?

1.	What Process Date Is Required To Size A Control Valve?
Answer» Medium – What is passing through the valve? – if it is a special liquid give specific gravity (at flowing temperate), critical pressure, vapour pressure and viscosity. Pressures – What is the maximum pressure that the valve needs to be rated for? What are the upstream and DOWNSTREAM pressures for each of the maximum, normal and minimum flow rates. Flow rates – Maximum, normal and minimum. The maximum is used to select the valve size, the minimum to check the turndown requirement and the normal to see where the valve will control. Temperature – Maximum temperature for design plus temperatures at maximum, normal and minimum flow conditions. Please see the RELEVANT ENQUIRY SHEETS for additional information that MAY assist in the sizing and selection of the control valve required.

Answer»

Medium – What is passing through the valve? – if it is a special liquid give specific gravity (at flowing temperate), critical pressure, vapour pressure and viscosity.
Pressures – What is the maximum pressure that the valve needs to be rated for? What are the upstream and DOWNSTREAM pressures for each of the maximum, normal and minimum flow rates.
Flow rates – Maximum, normal and minimum. The maximum is used to select the valve size, the minimum to check the turndown requirement and the normal to see where the valve will control.
Temperature – Maximum temperature for design plus temperatures at maximum, normal and minimum flow conditions.
Please see the RELEVANT ENQUIRY SHEETS for additional information that MAY assist in the sizing and selection of the control valve required.

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