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Ductile Iron Grooved Concentric Reducer, UL Listed Fire Protection Grooved Reducer for Fire Sprinkler Pipeline

Ductile Iron Grooved Concentric Reducer, UL Listed Fire Protection Grooved Reducer for Fire Sprinkler Pipeline

This UL listed grooved concentric reducer is grooved pipe fitting for fire‑protection system. Made of high‑strength ductile iron with red epoxy anti‑corrosion coating.

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Product Description

Rated diameter
mm

Pipe outside
measurerment mm

Rated Pressure
MPa

L
Measurement
mm

32×25s	42×G1	125×40s	140×G1-1/2
40×258	48×G1	125×50s	140×G2
40×32s	48×G1-1/4	125×658	140×2-1/2
50×40s	60×G1	125×808	140×G3
50×32s	60×G1-1/4	125×100s	140×G4
50×40s	60×G1-1/2	150×25s	159×G1
65×25s	76×G1	150×32s	159×G1-1/4
65×325	76×G1-1/4	54 150×40s	159×G1-1/2
65×40s	76×G1-1/2	150×50s	159×G2
65×50s	76×G2	150×65s	159×G2-1/2
80×25s	89×G1	150×80s	159×G3
80×32s	89×G1-1/4	150×100s	159×G4
80×40s	89×G1-1/2	150×25s	165×G1
80×50s	89×G2	150×32s	165×G1-1/4
80×65s	89×2-1/2	150×40s	165×G1-1/2
100×25s	108×G1	150×50s	165×G2
100×32s	108×G1-1/4	150×65s	165×G2-1/2
100×40s	108×G1-1/2	150×80s	165×G3
100×50s	108×G2	150×100s	165×G4
100×65s	108×G2-1/2	150×25s	168×G1
100×80s	108×G3	150×32s	168×G1-1/4
100×25s	114×G1	150×40s	168×G1-1/2
100×32s	114×G1-1/4	150×50s	168×G2
100×40s	114×G1-1/2	150×65s	168×G2-1/2
100×50s	114×G2	58 150×80s	168×G3
100×65s	114×G2-1/2	150×100s	168×G4
100×80s	114×G3	200×25s	219×G1
125×25s	133×G1	200×32s	219×G1-1/4
125×32s	133×G1-1/4	200×40s	219×G1-1/2
125×40s	133×G1-1/2	200×50s	219×G2
125×50s	133×G2	200×65s	219×G2-1/2
125×65s	133×G2-1/2	200×80s	219×G3
125×80s	133×G3	200×100s	219×G4
125×100s	133×G4	250×50s	273×G2
125×25s	140×G1	250×100s	273×G4
125×32s	140×G1-1/4

Main Features

Ductile iron cast body with red epoxy powder coating, anti‑corrosion for fire‑fighting piping system
Concentric reducing structure, used for transition between two different grooved pipe diameters
Both ends are grooved ends, directly connect with grooved couplings
Smooth inner concentric bore, low water flow resistance
UL & CE certified, comply with international fire‑safety standards
Grooved quick‑assembly design, no welding or threading required

Product Advantages

High‑strength ductile iron casting, resistant to pipeline water pressure and hydraulic shock
Red epoxy powder coating, excellent anti‑rust performance for indoor fire‑protection environment
Concentric smooth inner cavity, reduces turbulence and water‑flow loss
Grooved connection, fast on‑site installation, avoid hot‑welding operation, improve construction safety
UL Listed certification, satisfy acceptance requirements of overseas fire‑protection projects
Multiple size combinations available for different pipe diameter transition demands

Application Scenarios

‑ Fire sprinkler grooved steel pipe straight connection
‑ Building fire‑fighting water supply grooved piping system
‑ Shopping mall, hotel, hospital fire pipe network assembly
‑ Factory, warehouse fire‑protection piping project
‑ Overseas fire‑safety engineering with UL certification requirement

Precision Valve Manufacturing

Professional Valve Manufacturer | Integrated Manufacturing

Raw Material Inspection

We select high-quality raw materials according to product specifications and international standards. All incoming materials are carefully inspected to ensure chemical composition, mechanical properties and traceability.

Forging & Casting

Advanced forging and casting processes are used to produce strong and reliable fire hydrant valve bodies and components. Strict process control ensures uniform structure, dimensional accuracy and excellent mechanical performance.

CNC Machining

Our CNC machining equipment provides precise and consistent processing of fire hydrant valve components. Critical dimensions, threads and sealing surfaces are strictly controlled to ensure accurate assembly and reliable sealing performance.

Surface Treatment

fire hydrant valve surfaces are professionally shot blasted to remove rust, scale and impurities. by epoxy powder coating, red fire‑retardant painting or hot‑dip galvanizing for long‑term anti‑corrosion performance.

Pressure Testing

Every fire hydrant valve undergoes strict pressure testing before shipment. Body and seat tests are performed according to applicable standards and customer specifications to verify pressure resistance and sealing reliability.

Quality Inspection

Our quality control team conducts comprehensive inspections throughout the production process. Finished valves are checked for dimensions, appearance, materials, pressure performance and overall quality before final approval and shipment.

What is the function of grooved concentric reducer?

To connect grooved steel pipes of two different diameters for pipe size transition.

What is the difference between concentric reducer and eccentric reducer?

Concentric reducer keeps center‑line aligned; eccentric reducer is for avoiding air accumulation at pipe top.

What certifications does this reducer own?

UL Listed and CE certification for fire‑protection application.