UPVC Concentric Reducer

In UPVC concentric reducers, the area reduction is concentric, and the centerline of the pipe on the bigger end and the smaller end remains the same. These styles are normally used for vertical lines. In UPVC concentric reducers, the pipe axis remains the same. UPVC Concentric Reducers are reversible and can be used in any direction.

UPVC Concentric Reducer, the size reduction from a larger to a smaller size is uniform at a constant rate over a specified length, and different diameters on the same centreline axis are made possible by UPVC using concentric reducers.

UPVC Concentric Reducer Details

ID-1: Inside Diameter of (larger) opening.
OD-1 : Outside Diameter of (larger) opening.
WT-1: Wall Thickness of (larger) section.
SL-1 : Socket Length
ID-2 : Inside Diameter of (reduced) opening.
OD-2: Outside Diameter of (reduced) opening.
WT-2 : Wall Thickness of (reduced) section.
SL-2: Socket Length Reduced opening.
H: Total Overall Height (or Length) of the fitting.

Size (Inch)	ID-1 (mm)	OD-1 (mm)	WT-1 (mm)	SL-1 (mm)	ID-2 (mm)	OD-2 (mm)	WT-2 (mm)	SL-2 (mm)	H (mm)
¾ x ½	26.97	34.79	3.91	25.40	21.64	29.10	3.73	22.23	56
1 x ½	33.78	42.88	4.55	28.58	21.64	29.10	3.73	22.23	66
1 x ¾	33.78	42.88	4.55	28.58	26.97	34.79	3.91	25.40	65
1¼ x ½	42.55	52.25	4.85	31.75	21.64	29.10	3.73	22.23	69
1¼ x ¾	42.55	52.25	4.85	31.75	26.97	34.79	3.91	25.40	68
1¼ x 1	42.55	52.25	4.85	31.75	33.78	42.88	4.55	28.58	68
1½ x ½	48.72	58.88	5.08	34.93	21.64	29.10	3.73	22.23	74
1½ x ¾	48.72	58.88	5.08	34.93	26.97	34.79	3.91	25.40	76
1½ x 1	48.72	58.88	5.08	34.93	33.78	42.88	4.55	28.58	75
1½ x 1¼	48.72	58.88	5.08	34.93	42.55	52.25	4.85	31.75	74
2 x ½	60.78	71.86	5.54	38.10	21.64	29.10	3.73	22.23	85
2 x ¾	60.78	71.86	5.54	38.10	26.97	34.43	3.73	25.40	85
2 x 1	60.78	71.86	5.54	38.10	33.78	42.88	4.55	28.58	85
2 x 1¼	60.78	71.86	5.54	38.10	42.55	52.25	4.85	31.75	83
2 x 1½	60.78	71.86	5.54	38.10	48.72	58.88	5.08	34.93	83
2½ x 2	73.56	87.58	7.01	44.45	60.78	71.86	5.54	38.10	104
3 x 2	89.31	105.55	16.24	48.63	60.78	88.54	27.76	48.93	104
3 x 2½	89.51	104.75	7.62	47.63	73.38	83.70	5.16	44.45	107

Parameter	Details
Material	UPVC (Unplasticized Polyvinyl Chloride)
Type	Concentric (Centerline Reducer)
Size Range	½” × ¾” to 12” × 10” (15 mm × 20 mm to 315 mm × 250 mm)
Connection Type	Solvent Weld Socket Ends
Operating Pressure	Up to 10 bar (150 psi)
Temperature Range	0°C to 60°C (32°F to 140°F)
Color	Typically Grey
Standards Compliance	ASTM D2467, ISO, DIN

Smooth Size Transition: Allows direct reduction between different pipe diameters while maintaining flow alignment.
High Chemical Resistance: Ideal for transporting aggressive and corrosive fluids.
Strong and Rigid: Ensures long-lasting performance in high-pressure systems.
Compact and Lightweight: Easy to handle and install in tight spaces.
Solvent Weld Jointing: Provides a secure, leak-proof connection.
Corrosion-Free Construction: No risk of rust or scaling over time.

Schedule 40 uPVC

Nominal Size (Large × Small)	Pressure Rating (bar)	Pressure Rating (psi)
110 × 90 mm (4″ × 3″)	10.3	150
90 × 75 mm (3″ × 2½”)	12.4	180
75 × 63 mm (2½” × 2″)	13.8	200
63 × 50 mm (2″ × 1½”)	17.2	250
50 × 40 mm (1½” × 1¼”)	20.7	300
40 × 32 mm (1¼” × 1″)	24.1	350

Schedule 80 uPVC Pressure Ratings

Nominal Size (Large × Small)	Pressure Rating (bar)	Pressure Rating (psi)
110 × 90 mm (4″ × 3″)	17.2	250
90 × 75 mm (3″ × 2½”)	20.7	300
75 × 63 mm (2½” × 2″)	24.1	350
63 × 50 mm (2″ × 1½”)	27.6	400
50 × 40 mm (1½” × 1¼”)	31.0	450
40 × 32 mm (1¼” × 1″)	34.5	500

Property	Typical Value	Unit
Material	Unplasticized Polyvinyl Chloride (uPVC)	—
Density	1.38 – 1.45	g/cm³
Color	Grey / White / Blue (manufacturer specific)	—
Surface Finish	Smooth (low friction)	—
Hardness (Shore D)	80 – 85	—
Tensile Strength	45 – 55	MPa
Flexural Strength	80 – 90	MPa
Modulus of Elasticity	2,500 – 3,200	MPa
Impact Strength (Izod, notched)	5 – 10	kJ/m²
Thermal Conductivity	0.16	W/m·K
Coefficient of Linear Expansion	5 × 10⁻⁵	m/m·°C
Vicat Softening Temperature	80 – 85	°C
Max Continuous Service Temp.	60	°C
Min Service Temperature	0 to 5	°C
Electrical Conductivity	Non-conductive	—
Flame Resistance	Self-extinguishing	—

If you are searching for customized product designs that meet your requirements, don’t worry. Petron Thermoplast also offers custom product manufacturing services to meet the unique needs of various industries. Work with our expert engineers to create custom designs suited for your application.

Types of UPVC Concentric Reducer

Based on Pressure Class

PN 6 – Low-pressure applications
PN 10 – Medium-pressure applications
PN 16 – High-pressure applications
Schedule 40 – Standard industrial pressure
Schedule 80 – High-pressure industrial use

Based on End Connection

Solvent Cement Socket Type
- Permanent, leak-proof joint
- Most widely used type
Threaded Type (Male / Female)
- Used where dismantling is required
- Lower pressure rating than solvent-welded type
Spigot End Type
- Used with rubber ring or mechanical joints

Based on Size Reduction

Equal (Step) Concentric Reducer
- Small size difference between inlet and outlet
Unequal Concentric Reducer
- Large size difference between inlet and outlet

Based on Manufacturing Method

Injection-Molded Reducer
- Accurate dimensions and smooth finish
- Common for small and medium sizes
Fabricated Reducer
- Made from uPVC sections
- Used for large diameters

Based on Standards

ASTM (D2466 / D2467) – Industrial and chemical piping

Common Uses of UPVC Ball Valves

In power plants and chemical factories, Upvc concentric reducers are commonly used for vertical pipelines due to their symmetrical design, which allows for a smooth transition of steam, gases, or liquids, minimizing hydraulic disturbances. For example, in a power plant’s steam lines, Upvc concentric reducers ensure stable flow, which is crucial for efficient power generation and help prevent thermal distortion and sudden pressure shocks. Enhancing as pipelines benefit greatly from upvc concentric reducers. Their symmetrical shape maintains axis alignment and steady flow, reducing turbulence and pressure loss. This consistency is critical for the safe and efficient delivery of gas over long distances.

In HVAC systems, concentric reducers are used in vertical ducts to ensure smooth and even air distribution, maintaining consistent temperature and air quality throughout the building. In vertical water fluid lines, they prevent water hammer and protect pipes from damage.

Upvc concentric reducers are used in chemical processing plants and oil & gas refineries. Concentric reducers are used in vertical pipelines for the smooth flow of corrosive fluids and gases under high pressure. Their design helps in managing pressure transitions and reducing the risk of leaks.

Why Choose Petron Thermoplast?

Petron Thermoplast is a trusted manufacturer and supplier of high-quality UPVC Concentric Reducer, engineered to deliver reliable flow control in demanding industrial environments. Our reducers are designed to meet international standards while offering long-term performance and cost efficiency

UPVC Pipe Fittings

We offer UPVC Pipe Fittings products in all standard sizes and provide complete customization options to meet your specific project requirements across our entire product range.