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Products

Fabri-Valve Handwheel

Fabri-Valve Handwheel

Product Description

Handwheels are standard on most knife gate valves through 24” (DN 600). Rimpull is defined as the amount of force that must be applied to the handwheel rim to open or close the valve. Rimpull may exceed reasonable limits depending on the pressure drop across the valve, packing drag, and service conditions. Packing drag and ΔP across the valve are major contributors to the amount of force required. In most applications the ΔP drops as the valve is opened thus the rimpull is reduced as the valve is opened.

Download Literature


Specifications

When rimpull exceeds acceptable levels bevel gear operators are used to reduce the rimpull. Keep in mind that when a gear operator is used to reduce the rimpull the number of turns required will increase proportional to the effort decrease. For example: given the same size handwheel, a 3:1 gear will decrease the rimpull by a factor of 2.7 and triple the number of turns required.

Fabri-Valve Handwheel

Fabri-Valve Handwheel

Product Description

Handwheels are standard on most knife gate valves through 24” (DN 600). Rimpull is defined as the amount of force that must be applied to the handwheel rim to open or close the valve. Rimpull may exceed reasonable limits depending on the pressure drop across the valve, packing drag, and service conditions. Packing drag and ΔP across the valve are major contributors to the amount of force required. In most applications the ΔP drops as the valve is opened thus the rimpull is reduced as the valve is opened.

Download Literature

Specifications

When rimpull exceeds acceptable levels bevel gear operators are used to reduce the rimpull. Keep in mind that when a gear operator is used to reduce the rimpull the number of turns required will increase proportional to the effort decrease. For example: given the same size handwheel, a 3:1 gear will decrease the rimpull by a factor of 2.7 and triple the number of turns required.