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Installation
Installation on Actuator
Orientations, Normal and Reverse Acting
Normal acting is full clockwise when the process valve is closed and counterclockwise when the process valve is open. Reverse acting is full clockwise when the process valve is open and counterclockwise when the process valve is closed.
90° indicator dome assemblies are designed to accommodate any mounting arrangement and can be adjusted up to 9° off axis if needed. 45° indicator dome assemblies can only accommodate normal acting applications that are mounted parallel ±9°. Consult your local distributor or factory representative for 45° reverse acting or mounted perpendicular applications.
The image to the left shows a Valvetop unit mounted parallel to the process valve in the closed position. The green arrow at the top shows the “normal acting” direction of travel to open the valve. This is the standard orientation and unless otherwise specified, your unit will be factory set to operate in this fashion.
The image to the right shows a Valvetop mounted perpendicular to the process valve in the closed position. The green arrow at the top shows the “normal acting” direction of travel to open the valve. Notice that the indicator dome has been rotated 90° compared to the unit above.
Mounting
TopWorx has numerous mounting bracket kits, both rotary and linear, available to meet your specific application. Consult your local distributor or factory representative for ordering information. The illustration below shows a direct NAMUR mount on a quarter turn valve. Refer to your mount-ing kit documentation for specific mounting instructions.
Mounting Assembly
Installation Notes
1. Use caution not to allow undue axial (thrust) load on the shaft.
2. Cycle the valve a couple of times prior to final tightening of the mounting kit hardware. This allows the shaft to self-center in the pinion slot, or coupler. Refer to the dimensions and materials section of this document for appropriate tightening torque.
3. Always use sound mechanical practices when applying torque to any hardware or making pneumatic connections. Refer to the Integrated Pneumatic Control Valves section for detailed information.
