HDPE Butt Fusion Rubber Gasket for Water

Rubber gasket for HDPE flange connections, providing watertight sealing between flanges.

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Category: HDPE Butt Fusion Fittings

HDPE Butt Fusion Fittings

Product Overview

Rubber gasket for HDPE flange connections, providing watertight sealing between flanges. Made from EPDM for potable water or NBR for oily service, this HDPE flange gasket sits between the HDPE stub end face and the metal backing-ring flange to create a bolted, leak-free joint. The HDPE flange gasket covers 20 - 1200 mm to ANSI, DIN and BS flange standards.

Quick Information

Type: Rubber Gasket
Material: EPDM / NBR
Size: 20 - 1200 mm
Standard: ANSI / DIN / BS
Stock: In stock

Specification Table

尺寸 Size DN	D0 (mm)	D1 (mm)	D2 (mm)	da (mm)	H (mm)	L (mm)	螺孔数 n Number of bolt holes
15	93	16	65	14	3	115	4
20	103	21	75	14	3	125	4
25	113	28	85	14	3	135	4
32	138	36	100	18	3	160	4
40	148	45	110	18	3	170	4
50	163	57	125	18	3	185	4
65	183	69	145	18	3	205	4
80	198	83	160	18	3	220	8
100	218	103	180	18	3	250	8
De125	248	117	210	18	3	280	8
125	248	131.5	210	18	3	280	8
150	283	151	240	22	3	315	8
De180	283	166	240	22	3	315	8
De200	338	190	295	22	3	370	8
200	338	203	295	22	3	370	8
De250	393	239.5	350	22	3	430	12
300	443	302	400	22	3	485	12
350	500	320	450	22	3	550	16
400	550	350	500	22	3	590	16

Key Features

Watertight Flange Seal: The HDPE flange gasket compresses evenly between flange faces to seal water under full line pressure.
EPDM or NBR Choice: EPDM HDPE flange gaskets suit potable water; NBR versions handle oils and hydrocarbon contact.
Multi-Standard Dimensions: The HDPE flange gasket is die-cut to ANSI, DIN and BS flange patterns from 20 to 1200 mm.
Potable-Water Safe: EPDM HDPE flange gaskets meet drinking-water contact requirements for municipal supply systems.
Resilient Compression Set: The HDPE flange gasket rebounds after bolt loading, maintaining seal even with minor flange face imperfections.
Aging and Ozone Resistance: The rubber compound of the HDPE flange gasket resists ozone, UV and aging for a long service life.

Production

Raw Material

Each HDPE flange gasket is vulcanized from premium EPDM or NBR rubber compound selected for water service and long compression-set resistance.

Molding Process

The HDPE flange gasket is compression molded in sheet form and precision die-cut to the exact inner, outer and bolt-circle dimensions of the target flange standard.

Quality Control

Batches of HDPE flange gaskets are checked for dimensional accuracy, hardness (Shore A), tensile strength and compression set before packing.

Applications

HDPE stub end flange joints use the HDPE flange gasket with backing rings for bolted water connections.
Valve and meter chambers install the EPDM HDPE flange gasket at every demountable joint.
Pump station piping relies on the HDPE flange gasket for sealed connections between HDPE lines and metal equipment.
Industrial water systems choose the NBR HDPE flange gasket where oils or hydrocarbon traces are present.