Valve Lockouts:
Devices for Ball Valves, Handwheels and Special Fittings

Versions and Product Variants

FSP-Tech® supplies valve lockouts that block fittings in position once they are closed and keep the flow of material or energy interrupted during maintenance work. The product range covers handwheels from 25 mm to 600 mm in diameter, ball valves from 0.25 inch to 8 inch as well as wing-handle, diaphragm, boiler drain, angle and disc valves. Lockouts for gas cylinder handwheels and a lockout for compressed air couplings are also available. Depending on the version, the lockouts are made of polypropylene, polyamide or coated steel, and the lockout for compressed air couplings of stainless steel. Transparent caps allow the valve position to be seen. Every version accepts at least one safety padlock.

  • Gate valve lockouts for handwheel diameters from 25 mm to 600 mm in six graduated sizes, material polypropylene
  • Adjustable valve lockout for handwheels from 25 mm to 165 mm, recommended minimum diameter 85 mm
  • Ball valve lockouts made of polypropylene for valve sizes from 0.25 inch to 2.5 inch and from 2 inch to 8 inch, size infinitely adjustable
  • Ball valve lockouts made of coated steel for valve sizes from 0.25 inch to 1 inch and from 1.25 inch to 3 inch
  • Gas cylinder handwheel lockouts for handwheel diameters of 80 mm and 100 mm, valve stem up to 1.25 inch, material polyamide
  • Butterfly valve lockout for fittings with lever operation
  • Caps for diaphragm valves in two sizes, inside diameter 24.4 mm or 32 mm with a reducing ring and 46 mm without a reducing ring
  • Cap for wing-handle and boiler drain valves, outside diameter 72 mm, inside diameter 14.5 mm with a reducing ring and 58 mm without a reducing ring
  • Wing-handle and hydraulic valve lockouts with 70 mm and 91 mm outside diameter, square inside dimension 31 mm and 40 mm, transparent polyamide
  • Cap for angle valves with a fitting for two padlocks, material polypropylene
  • Disc valve lockout with a loop over the handle, fixed by a clamping screw
  • Lockout for pneumatic and compressed air couplings from 1/4 inch to 13/16 inch, dimensions 33 mm x 185 mm x 3.2 mm, stainless steel, fitting for two padlocks
  • Operating temperature -20°C to +120°C on the polyamide valve caps
  • DIN EN 17975:2025, Maintenance, Risk control processes of energies and fluids risks in maintenance activities, Guidance: guidance on introducing and carrying out Lockout/Tagout procedures
  • BetrSichV, the German Ordinance on Industrial Safety and Health: requirements for maintenance and for the safe condition of work equipment

Technical Features

Areas of Application

Valve lockouts are used wherever pipelines, vessels or compressed air networks are isolated before maintenance work and secured against unintentional opening. Typical applications are found in the chemical and petrochemical industry, in pharmaceutical and food production, in wastewater treatment plants, in power generation and in plant engineering. On pipelines, ball valve lockouts and handwheel lockouts hold the closed position, on machines coupling lockouts interrupt the compressed air supply, and in laboratories and pilot plants diaphragm and wing-handle valves are blocked with caps. Where several trades work on the same line, the lockout can be extended for additional padlocks with a lockout hasp.

Accessories and Custom Options

Advice on Valve Lockouts

Which lockout suits a fitting depends on its design, the handwheel diameter and the valve size. We record the isolation points in your plant, assign the matching version to each of them and on request supply the complete shadow board equipped for the relevant plant area.