Clamp-On Chain Models

Irrespective of the distance between points, elevations, directional flows and space constraints H N Supplies can engineer a Roto Hammer® valve operation system that will work for you. With our Custom Solutions for valves  you’ll be back up and running sooner, minimising expensive downtime.

Item No. Hand Wheel Diameter
EXT-CMCO-6 152 mm (6”)
EXT-CMCO-9 229 mm (9”)
EXT-CMCO-12 305 mm (12”)
EXT-CMCO-15 381 mm (15”)
EXT-CMCO-18 457 mm (18”)
EXT-CMCO-24 610 mm (24”)
EXT-CMCO-30 762 mm (30”)
EXT-CMCO-36 914 mm (36”)

Please supply the following information when ordering Clamp-On Chain Model valve extensions:

1. Valve size and type
2. Diameter of existing hand wheel
3. Number of hand wheel spokes
4. Length of extension required
5. Chain length required

If the valve extension will be in a horizontal position and longer than 914mm (3’) the purchase of an Extension Rod Support Bearing for additional support is recommended.

CAUTION: Provisions must be made to prevent the HANDWHEEL RETAINING NUT FROM BACKING OFF whenever a chain wheel is installed. To ensure safe operation H N Supplies recommends that a thorough inspection of all chain operated valves be performed as a routine part of the user’s Safety/Maintenance Schedule. Set screws and other threaded fasteners MUST be secure and tight.

In addition, it is strongly recommended that an appropriately sized Roto Hammer RCK Safety Cable Kit (optional) be installed on every overhead chain wheel operated valve.