Hammer-Blow

Hammer-Blows make it easy to control high-pressure valves from the floor in out-of-reach locations. The “hammer” action makes opening or closing sticky valves easier for an operator of any size without damaging the chainwheel or valve.

Available in the following materials:
  • Ductile Iron is more shock resistant than cast iron and is required for hammer-blow style wheels.
Standard Components
  • Chainwheel
  • Guide arm and cap
  • Zinc plated carbon steel attachment set for clamping to the valve hand wheel
  • Hammer-Blow mechanism attached to the spokes of the chainwheel and provides the “hammer” action that facilitates opening and closing of sticky valves
  • Attachment instructions for installing the chainwheel to the hand wheel of the valve

Click here to view installation instructions for chainwheels.

  • Safety kits provide a secondary attachment to reduce the potential hazard of a falling valve hand wheel. Included in the kit are a safety cap and 5 feet of 7x19 stainless steel wire with 4 stainless steel clamps. To order a safety wheel, use the part numbers below and add “SW” to the end of the alpha section of the part number (e.g., DIRGHBSW-2.5). HIGHLY RECOMMENDED
  • Stainless steel attachment sets are the same dimensions as the zinc plated carbon steel attachment sets but are constructed out of 304 stainless. They are recommended for areas where the chainwheel or components will be exposed to corrosive environments. To add stainless steel attachment sets to your order, use the part numbers below and add “SS” to the end of the part number (e.g., DIRGHB-2.5SS).
  • Chain is required for chainwheel operation but is not included in the price due to varying length requirements. For more information on chain, visit our chain section.
Diameter of Valve Handwheel Range (inches)Part Number
6 to 7-1/2DIRGHB-1.5
7-3/4 to 9DIRGHB-2
9-1/4 to 12-1/2DIRGHB-2.5
12-3/4 to 15-1/2DIRGHB-3
15-3/4 to 19DIRGHB-3.5
19-1/4 to 22DIRGHB-4
22-1/2 to 26DIRGHB-4.5
26-1/4 to 30DIRGHB-5
30-1/4 to 36DIRGHB-5L