Product

Concentric / Eccentric Reducer

Our PFA lined reducers are available in sizes ranging from 25 mm to 300 mm in diameter, with lining thickness varying from 3 mm to 8 mm depending on size. Concentric reducers provide a symmetrical transition (centerline maintained), while eccentric reducers help avoid air entrapment or liquid accumulation by maintaining a flat side—ideal for horizontal piping. Lining options include PFA, FEP, PVDF, HDPE, and antistatic PTFE. Suitable for full vacuum applications.

Process ready Leak resistant Chemical duty

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Concentric / Eccentric Reducer main view

Product Overview

Application and service highlights

Introduction

Our PFA lined reducers are available in sizes ranging from 25 mm to 300 mm in diameter, with lining thickness varying from 3 mm to 8 mm depending on the size. Concentric reducers are used where a symmetrical flow transition is required (maintaining pipeline centerline), while eccentric reducers are designed to avoid air entrapment or liquid accumulation by maintaining a flat side—making them ideal for horizontal piping systems. A wide range of lining options is available beyond PFA, including FEP, PVDF, HDPE, and antistatic PTFE, with reducers suitable for full vacuum applications.

Key Features

Smoothly connects different nominal pipe sizes.
Concentric or eccentric geometry can be selected to suit service conditions.
Maintains corrosion resistance through the full transition section.

Specifications

Material, dimensions and testing standards

Material

Body: D.I. casting as per ASTM A 395, Gr. 60-40-18.
Lining: PFA conforming ASTM D3307; PP conforming ASTM D4101; PVDF conforming ASTM D3222; HDPE conforming ASTM D3350.

Dimensions

Flange as per ANSI B16.5, 150#.
Lining and other dimensional tolerance as per ASTM F1545.
Lining thickness: 3 mm to 8 mm.

Testing

100% visual and dimensional check.
100% spark test at 15 KVDC.
100% hydro test at 29 Kg/cm2, holding for 3 minutes, as per ASTM F1545.
100% lining thickness check (>80% of flaring thickness).

Technical Drawing

Cross-sectional reference

Dimensional Specifications

Dimensional table

Dimension detail

NB1	NB2	L	T
25	20	114	35
40	25	114	35
50	25	127	35
50	40	127	35
80	25	152	35
80	40	152	45
80	50	152	45
100	25	178	45
100	40	178	45
100	50	178	45
100	80	178	45
150	25	229	54
150	40	229	54

Dimension detail

NB1	NB2	L	T
150	50	229	54
150	80	229	54
150	100	229	54
200	80	279	54
200	100	279	54
200	150	279	54
250	100	305	54
250	150	305	54
250	200	305	54
300	150	356	54
300	200	356	54
350	300	406	60

Flange dimension detail (MM) ( ANSI CLASS 150# )

NB	R/F	P.C.D	D	T	No. of Hole (N)	Hole Dia. (Ø)
25	50.8	79.4	108.0	14.5	4	15.9
40	73.0	98.4	127.0	17.5	4	15.9
50	92.1	120.7	152.4	19.5	4	19
80	127.0	152.4	190.5	24.0	4	19
100	157.2	190.5	228.6	24.0	8	19
150	215.9	241.3	279.5	25.5	8	22.2
200	269.9	298.5	342.9	29.0	8	22.2
250	323.9	362.0	406.4	30.5	12	25.4
300	381.0	431.8	482.6	32.0	12	25.4

NB1	NB2	L	T
25	20	114	35
40	25	114	35
50	25	127	35
50	40	127	35
80	25	152	35
80	40	152	45
80	50	152	45
100	25	178	45
100	40	178	45
100	50	178	45
100	80	178	45
150	25	229	54
150	40	229	54

NB1	NB2	L	T
150	50	229	54
150	80	229	54
150	100	229	54
200	80	279	54
200	100	279	54
200	150	279	54
250	100	305	54
250	150	305	54
250	200	305	54
300	150	356	54
300	200	356	54
350	300	406	60

NB1	NB2	L	T
25	20	114	35
40	25	114	35
50	25	127	35
50	40	127	35
80	25	152	35
80	40	152	45
80	50	152	45
100	25	178	45
100	40	178	45
100	50	178	45
100	80	178	45
150	25	229	54
150	40	229	54

NB1	NB2	L	T
150	50	229	54
150	80	229	54
150	100	229	54
200	80	279	54
200	100	279	54
200	150	279	54
250	100	305	54
250	150	305	54
250	200	305	54
300	150	356	54
300	200	356	54
350	300	406	60

Concentric / Eccentric Reducer

Product Overview

Introduction

Key Features

Specifications

Material

Dimensions

Testing

Technical Drawing

Dimensional Specifications

Dimension detail

Dimension detail

Flange dimension detail (MM) ( ANSI CLASS 150# )

Related products

NB1	NB2	L	T
25	20	114	35
40	25	114	35
50	25	127	35
50	40	127	35
80	25	152	35
80	40	152	45
80	50	152	45
100	25	178	45
100	40	178	45
100	50	178	45
100	80	178	45
150	25	229	54
150	40	229	54

NB1	NB2	L	T
150	50	229	54
150	80	229	54
150	100	229	54
200	80	279	54
200	100	279	54
200	150	279	54
250	100	305	54
250	150	305	54
250	200	305	54
300	150	356	54
300	200	356	54
350	300	406	60