The KEEPER locking cylinder from KETTLER stands for reliable safety and effective access protection for gas and water valves in public and industrial supply areas. It prevents the unintentional or unauthorized actuation of valves and thus makes a significant contribution to operational safety and compliance with safety-related specifications.

Safety through sophisticated design

The KEEPER was specially developed for use in safety-critical environments. Its robust construction in combination with a high-precision mechanical design makes manipulation attempts from the outside extremely difficult. The locking cylinder completely covers the operating element and thus reliably prevents unauthorized access. This prevents unintentional operation or access by unauthorized persons.

Simple installation - can be used on a wide range of fittings

The KEEPER is installed quickly and easily: Using a special installation tool, the locking cylinder is placed directly onto the square of the valve actuator (usually an extension spindle). The design allows the bearing to rotate freely, which means that actuation without the appropriate unlocking tool is impossible. Once fitted, the KEEPER locking cylinder is securely closed by a conspicuous red protective cover, providing an additional visual indication that the valve is secured.

Ideal even in confined spaces

Thanks to its compact and slim design, the KEEPER locking cylinder is particularly suitable for use in street caps or manholes with limited space. Even under difficult installation conditions, the locking cylinder ensures safe and reliable protection without impairing the function or maintenance of the valve.

Advantages at a glance:

  • Effective protection against unauthorized or unintentional access
  • Robust construction for long-term safety and weather resistance
  • Quick and easy installation without interfering with the fitting
  • Visual protection with red protective cover
  • Space-saving design for tight installation situations
  • Ideal for utility companies, grid operators, municipalities and industrial plants

KEEPER protection class I - long-term

Black cylindrical container next to a round, orange-colored disc with a graphic logo on a white surface.

KEEPER gate valve POM

  • Right-locking, for closed fittings
  • Left-hand locking, for open fittings
  • Protection against improper and unauthorized access
Black sensor with orange token on gray background, for use with the electronic board game Khet 2.0.

KEEPER tapping bridge POM

  • Right-locking, for closed fittings
  • Left-hand locking, for open fittings
  • Protection against improper and unauthorized access

KEEPER protection class II - short-term

Round silver metal cylinder with removable orange cover showing a logo on a white background.

KEEPER gate valve ST37/C45

  • Right-locking, for closed fittings
  • Left-hand locking, for open fittings
  • Protection against sabotage and unauthorized access
Small round robot made of metal with a colorful orange chip next to it on a white background.

KEEPER tapping bridge ST37/C45

  • Right-locking, for closed fittings
  • Left-hand locking, for open fittings
  • Protection against sabotage and unauthorized access

KEEPER case equipment

Open black toolbox with repair kit and instructions, contains cans, bottles and accessories on a black foam background.

SET - Case contents tapping bridge

  • 5 x KEEPER VAS R
  • 5 x replacement protective cover
  • 1 x VAS assembly tool
  • 1 x extension 30cm
  • 1 x torque wrench 1/2", 10-100 Nm
  • 1 x socket wrench SW13 - 1/2"
  • 1 x universal oil 100 ml
  • 1 x zinc spray 150 ml
  • 1 x flat brush
  • 1 x assembly instructions
Tool case with various tools and accessories, including manuals and chemicals, arranged in a padded black box.

SET - Case contents gate valve

  • 4 x KEEPER KOS R
  • 4 x replacement protective cover
  • 1 x assembly tool KOS
  • 1 x extension 30cm
  • 1 x torque wrench 1/2", 10-100 Nm
  • 1 x socket wrench SW17 - 1/2"
  • 1 x universal oil 100 ml
  • 1 x zinc spray 150 ml
  • 1 x flat brush
  • 1 x assembly instructions
Tool set with torque wrench, spray cans, metal parts and accessories in autofocus. In the background, an open case with additional tools.
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Basic equipment

Round numbering - Parts list
Assembly tool C45m gZn
CrV extension
KEEPER ST37/C45
Torque wrench 1/2" CrV
Socket wrench SW 13-1/2" CrV
Cutting ring C45 hardened, gZn
Protective cover St37, gZn
Flat brush
Presto zinc spray
Universal oil Ballistol
Plastic case, black PP
Assembly instructions

Installation instructions, tender texts and current brochures: clearly structured, professionally formulated and available to download at any time.