Materials & Finish
- Housing: ductile cast iron, ASTM A536 Grade 65-45-12.
- Gasket: EPDM.
- Bolts and nuts: quenched and tempered steel, ASTM A449.
- Finishes: painted red or galvanised; red epoxy available on request.
Grooved Reducing Coupling
Viking Fireking VK-DC Reducing Coupling
VK-DC — ductile iron, EPDM gasket, 20.7 bar (300 psi), 2" × 1-1/2" to 8" × 6"
Viking Fireking VK-DC Reducing Coupling from Viking is a grooved reducing coupling in ductile iron with EPDM gasket for joining pipes of different diameters in fire systems, rated 20.7 bar (300 psi).
Manufactured by
Viking
Viking Fireking VK-DC Reducing Coupling
Review the confirmed product information, including description, features, benefits, and applications.
The Viking Fireking™ VK-DC is a grooved mechanical reducing coupling for joining pipes of dissimilar diameters in fire-suppression systems. It reduces the pipe size while keeping a secure mechanical joint.
The coupling is made from ductile iron with an EPDM gasket and installs without welding. It is supplied painted red or galvanised, with red epoxy available on request, to suit environmental and corrosion-resistance requirements.
Pressure & Temperature
- Working pressure: 20.7 bar (300 psi).
- Ambient temperature: -34 °C to 110 °C (-29.2 °F to 230 °F).
Connection & Sizes
- Nominal sizes 2" × 1-1/2" to 8" × 6" (DN50 × DN40 to DN200 × DN150).
- Grooved ends on both pipe sizes; no welding or threading.
- For water-based fire-suppression systems.
Design
- Single coupling combines the joint and the size reduction.
- Mechanical gasket seal on both pipe ends.
Rapid Installation
No welding or threading reduces on-site labour and risk.
Leak-Resistant Joint
The mechanical gasket seal holds under system pressure.
System Flexibility
Accommodates field deviations and simplifies maintenance.
Corrosion Protection
Finish options improve corrosion resistance in varied environments.
The VK-DC suits fire-protection networks that need a size transition at a grooved joint.
Wet & Dry Systems
Size transitions in wet and dry fire sprinkler networks.
Preaction & Deluge
Reducing joints in preaction and deluge system piping.
Standpipe Systems
Size changes along standpipe distribution lines.
Pump Discharge & Risers
Pump discharge and riser connections with different pipe sizes.
UL Listed
The VK-DC is UL Listed at a working pressure of 20.7 bar (300 psi).
FM Approved
The VK-DC is FM Approved at a working pressure of 20.7 bar (300 psi).
Need support with this reducing coupling?
Share your run and reduced pipe sizes, pipe outside diameters, working pressure, and required finish, and our MEP team will support you with the suitable product information.
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