Industries
Worm gears, leadscrews and knurled parts for pumps and valves
Worm gear operators, stem leadscrews and knurled components
Products fromRapidApexMalkar
On This Page
Overview
Pumps, Valves & Flow Control
Large butterfly, ball and gate valves are opened and closed through worm gear operators: a worm and wheel that multiplies handwheel torque and self-locks the valve in position. Rising-stem gate valves use trapezoidal stem threads, and pumps use knurled shafts for press-fit impellers and couplings.
Advantages
Why valve and pump makers choose us
Self-locking
Worm drives hold the valve position.
Torque multiplication
Easy manual operation of large valves.
Trapezoidal threads
Strong, wear-resistant stem threads.
Products
Products used in pumps and valves
Standard catalogue items, or made to your drawing.
Malkar
Apex
Rapid
MalkarApplications
Applications in Pumps, Valves & Flow Control
Press-fit knurling on motor and pump shafts
A straight knurl on the shaft locks rotor cores, commutators, impellers and couplings in place without keys, adhesives or splines.
Worm gear operators for quarter-turn valves
Self-locking worm gear sets turn butterfly and ball valves and hold them in position against the flow.
Rising-stem gate valves
A trapezoidal stem thread and nut raise and lower the gate and hold it against line pressure.
Talk to an application engineer
Share your drawing, material and machine, and we'll help you choose the right tool or component, or design a custom one.
