Materials & Finish
- Body: ductile cast iron, ASTM A536 Grade 65-45-12.
- Finish: painted red or galvanized.
- Red epoxy coating available on request.
Grooved Concentric Reducer
Viking Fireking VK-CRG Grooved Concentric Reducer
VK-CRG — Ductile Iron, 16–34.5 bar (232–500 psi), 1-1/4"×1" to 12"×10" (DN32×DN25–DN300×DN250)
Viking Fireking VK-CRG Grooved Concentric Reducer from Viking is a ductile iron grooved × grooved reducer for centered pipe size changes in fire-suppression piping, rated up to 34.5 bar (500 psi).
Manufactured by
Viking
Viking Fireking VK-CRG Grooved Concentric Reducer
Review the confirmed product information, including description, features, benefits, and applications.
The Viking Fireking™ VK-CRG Grooved Concentric Reducer provides a centered, gradual transition between pipe sizes while keeping system alignment and hydraulic performance.
The reducer is made from high-strength ductile cast iron to ASTM A536 Grade 65-45-12. It is pressure-rated from 16 bar (232 psi) to 34.5 bar (500 psi), depending on size and approval, for use in water-based fire-suppression systems.
Pressure & Service
- Working pressure: 16 bar (232 psi) to 34.5 bar (500 psi), depending on size and approval.
- For water-based fire-suppression systems.
Connection & Sizes
- Connection type: grooved × grooved.
- Sizes 1-1/4" × 1" to 12" × 10".
- DN32 × DN25 to DN300 × DN250.
Design
- Concentric reduction on a common centerline.
- Smooth internal profile.
Centerline Alignment
Keeps pipe centerline alignment and reduces system stress.
Lower Pressure Loss
Smooth internal profile limits pressure loss and turbulence.
No Welded Reducers
Replaces welded or fabricated reducers.
Faster Installation
Installs faster with grooved mechanical joints.
The VK-CRG Reducer is used where fire-protection piping needs a concentric size change without offset.
Sprinkler Mains
Size changes along fire sprinkler mains.
Vertical Risers
Concentric reductions in vertical riser installations.
Distribution Piping
Size steps within fire-protection distribution piping.
UL Listed
UL maximum working pressure up to 400 psi (27.6 bar), depending on size.
FM Approved
FM maximum working pressure up to 500 psi (34.5 bar), depending on size.
Need support with this concentric reducer?
Share your main 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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