Materials & Finish
- Body: ductile cast iron, ASTM A536 Grade 65-45-12.
- Finish: painted red or galvanized.
- Red epoxy coating available on request.
Threaded Concentric Reducer
Viking Fireking VK-CRT Threaded Concentric Reducer
VK-CRT — Grooved × NPT/BSP, 16–34.5 bar (232–500 psi), 1-1/2"×1" to 8"×4"
Viking Fireking VK-CRT Threaded Concentric Reducer from Viking is a ductile iron grooved × threaded reducer that steps down to an NPT or BSP outlet in fire-suppression piping, rated up to 34.5 bar (500 psi).
Manufactured by
Viking
Viking Fireking VK-CRT Threaded Concentric Reducer
Review the confirmed product information, including description, features, benefits, and applications.
The Viking Fireking™ VK-CRT Concentric Reducer – Threaded makes the transition from grooved pipe to a smaller threaded outlet while keeping concentric alignment. It is available with NPT or BSP threads.
The reducer gives a compact way to connect valves, instruments and auxiliary devices in fire-suppression systems. It is made from ductile cast iron to ASTM A536 Grade 65-45-12 and rated from 16 bar (232 psi) to 34.5 bar (500 psi), depending on size and approval.
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 × threaded (NPT or BSP).
- NPT sizes 1-1/2" × 1" to 8" × 4".
- BSP sizes DN40 × DN25 to DN200 × DN100.
Design
- Concentric reduction on a common centerline.
- Connects threaded equipment without extra adapters.
Direct Threaded Connection
Joins grooved piping to threaded equipment without adapters.
Fewer Leak Points
Reduces the number of fittings and potential leak points.
Time Saving
Saves installation time compared with fabricated transitions.
Mechanical Strength
High mechanical strength for fire-protection duty.
The VK-CRT Reducer connects threaded components to a grooved fire sprinkler main.
Threaded Valves
Connections from grooved mains to threaded valves.
Pressure Gauges
Threaded gauge connections on grooved piping.
Drain Connections
Threaded drain outlets from grooved lines.
Auxiliary Devices
Threaded auxiliary devices in sprinkler systems.
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 grooved pipe size, threaded outlet size, thread type (NPT or BSP), and working pressure, and our MEP team will support you with the suitable product information.
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